Mercurial > hg > xemacs-beta
annotate src/eval.c @ 5555:a39cd9dc92ba
Correct a typo from Mats' merge, process.el, thank you the byte-compiler
lisp/ChangeLog addition:
2011-08-24 Aidan Kehoe <kehoea@parhasard.net>
* process.el (shell-command-on-region):
Correct typo from the merge, nnot -> not.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Wed, 24 Aug 2011 11:22:30 +0100 |
| parents | b0d87f92e60b |
| children | 56144c8593a8 |
| rev | line source |
|---|---|
| 428 | 1 /* Evaluator for XEmacs Lisp interpreter. |
| 2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
|
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4 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2010 Ben Wing. |
| 428 | 5 |
| 6 This file is part of XEmacs. | |
| 7 | |
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8 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 9 under the terms of the GNU General Public License as published by the |
|
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10 Free Software Foundation, either version 3 of the License, or (at your |
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11 option) any later version. |
| 428 | 12 |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
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19 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 20 |
| 21 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */ | |
| 22 | |
| 853 | 23 /* Authorship: |
| 24 | |
| 25 Based on code from pre-release FSF 19, c. 1991. | |
| 26 Some work by Richard Mlynarik long ago (c. 1993?) -- | |
| 27 added call-with-condition-handler; synch. up to released FSF 19.7 | |
| 28 for lemacs 19.8. some signal changes. | |
| 29 Various work by Ben Wing, 1995-1996: | |
| 30 added all stuff dealing with trapping errors, suspended-errors, etc. | |
| 31 added most Fsignal front ends. | |
| 32 added warning code. | |
| 33 reworked the Fsignal code and synched the rest up to FSF 19.30. | |
| 34 Some changes by Martin Buchholz c. 1999? | |
| 35 e.g. PRIMITIVE_FUNCALL macros. | |
| 36 New call_trapping_problems code and large comments below | |
| 37 by Ben Wing, Mar-Apr 2000. | |
| 38 */ | |
| 39 | |
| 40 /* This file has been Mule-ized. */ | |
| 41 | |
| 42 /* What is in this file? | |
| 43 | |
| 44 This file contains the engine for the ELisp interpreter in XEmacs. | |
| 45 The engine does the actual work of implementing function calls, | |
| 46 form evaluation, non-local exits (catch, throw, signal, | |
| 47 condition-case, call-with-condition-handler), unwind-protects, | |
| 48 dynamic bindings, let constructs, backtraces, etc. You might say | |
| 49 that this module is the very heart of XEmacs, and everything else | |
| 50 in XEmacs is merely an auxiliary module implementing some specific | |
| 51 functionality that may be called from the heart at an appropriate | |
| 52 time. | |
| 53 | |
| 54 The only exception is the alloc.c module, which implements the | |
| 55 framework upon which this module (eval.c) works. alloc.c works | |
| 56 with creating the actual Lisp objects themselves and garbage | |
| 1960 | 57 collecting them as necessary, presenting a nice, high-level |
| 853 | 58 interface for object creation, deletion, access, and modification. |
| 59 | |
| 60 The only other exception that could be cited is the event-handling | |
| 61 module in event-stream.c. From its perspective, it is also the | |
| 62 heart of XEmacs, and controls exactly what gets done at what time. | |
| 63 From its perspective, eval.c is merely one of the auxiliary modules | |
| 64 out there that can be invoked by event-stream.c. | |
| 65 | |
| 66 Although the event-stream-centric view is a convenient fiction that | |
| 67 makes sense particularly from the user's perspective and from the | |
| 68 perspective of time, the engine-centric view is actually closest to | |
| 69 the truth, because anywhere within the event-stream module, you are | |
| 70 still somewhere in a Lisp backtrace, and event-loops are begun by | |
| 71 functions such as `command-loop-1', a Lisp function. | |
| 72 | |
| 73 As the Lisp engine is doing its thing, it maintains the state of | |
| 1960 | 74 the engine primarily in five list-like items, which are: |
| 853 | 75 |
| 76 -- the backtrace list | |
| 77 -- the catchtag list | |
| 78 -- the condition-handler list | |
| 79 -- the specbind list | |
| 80 -- the GCPRO list. | |
| 81 | |
| 82 These are described in detail in the next comment. | |
| 83 | |
| 84 --ben | |
| 85 */ | |
| 86 | |
| 87 /* Note that there are five separate lists used to maintain state in | |
| 88 the evaluator. All of them conceptually are stacks (last-in, | |
| 89 first-out). All non-local exits happen ultimately through the | |
| 90 catch/throw mechanism, which uses one of the five lists (the | |
| 91 catchtag list) and records the current state of the others in each | |
| 92 frame of the list (some other information is recorded and restored | |
| 93 as well, such as the current eval depth), so that all the state of | |
| 94 the evaluator is restored properly when a non-local exit occurs. | |
| 95 (Note that the current state of the condition-handler list is not | |
| 96 recorded in the catchtag list. Instead, when a condition-case or | |
| 97 call-with-condition-handler is set up, it installs an | |
| 98 unwind-protect on the specbind list to restore the appropriate | |
| 99 setting for the condition-handler list. During the course of | |
| 100 handling the non-local exit, all entries on the specbind list that | |
| 101 are past the location stored in the catch frame are "unwound" | |
| 102 (i.e. variable bindings are restored and unwind-protects are | |
| 103 executed), so the condition-handler list gets reset properly. | |
| 104 | |
| 105 The five lists are | |
| 106 | |
| 107 1. The backtrace list, which is chained through `struct backtrace's | |
| 108 declared in the stack frames of various primitives, and keeps | |
| 109 track of all Lisp function call entries and exits. | |
| 110 2. The catchtag list, which is chained through `struct catchtag's | |
| 111 declared in the stack frames of internal_catch and condition_case_1, | |
| 112 and keeps track of information needed to reset the internal state | |
| 113 of the evaluator to the state that was current when the catch or | |
| 114 condition-case were established, in the event of a non-local exit. | |
| 115 3. The condition-handler list, which is a simple Lisp list with new | |
| 116 entries consed onto the front of the list. It records condition-cases | |
| 117 and call-with-condition-handlers established either from C or from | |
| 118 Lisp. Unlike with the other lists (but similar to everything else | |
| 119 of a similar nature in the rest of the C and Lisp code), it takes care | |
| 120 of restoring itself appropriately in the event of a non-local exit | |
| 121 through the use of the unwind-protect mechanism. | |
| 122 4. The specbind list, which is a contiguous array of `struct specbinding's, | |
| 123 expanded as necessary using realloc(). It holds dynamic variable | |
| 124 bindings (the only kind we currently have in ELisp) and unwind-protects. | |
| 125 5. The GCPRO list, which is chained through `struct gcpro's declared in | |
| 126 the stack frames of any functions that need to GC-protect Lisp_Objects | |
| 127 declared on the stack. This is one of the most fragile areas of the | |
| 128 entire scheme -- you must not forget to UNGCPRO at the end of your | |
| 129 function, you must make sure you GCPRO in many circumstances you don't | |
| 130 think you have to, etc. See the internals manual for more information | |
| 131 about this. | |
| 132 | |
| 133 --ben | |
| 134 */ | |
| 135 | |
| 428 | 136 #include <config.h> |
| 137 #include "lisp.h" | |
| 138 | |
| 139 #include "commands.h" | |
| 140 #include "backtrace.h" | |
| 141 #include "bytecode.h" | |
| 142 #include "buffer.h" | |
| 872 | 143 #include "console-impl.h" |
| 853 | 144 #include "device.h" |
| 145 #include "frame.h" | |
| 146 #include "lstream.h" | |
| 428 | 147 #include "opaque.h" |
| 1292 | 148 #include "profile.h" |
| 853 | 149 #include "window.h" |
| 428 | 150 |
| 151 struct backtrace *backtrace_list; | |
| 152 | |
| 153 /* Macros for calling subrs with an argument list whose length is only | |
| 154 known at runtime. See EXFUN and DEFUN for similar hackery. */ | |
| 155 | |
| 156 #define AV_0(av) | |
| 157 #define AV_1(av) av[0] | |
| 158 #define AV_2(av) AV_1(av), av[1] | |
| 159 #define AV_3(av) AV_2(av), av[2] | |
| 160 #define AV_4(av) AV_3(av), av[3] | |
| 161 #define AV_5(av) AV_4(av), av[4] | |
| 162 #define AV_6(av) AV_5(av), av[5] | |
| 163 #define AV_7(av) AV_6(av), av[6] | |
| 164 #define AV_8(av) AV_7(av), av[7] | |
| 165 | |
| 166 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \ | |
| 444 | 167 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av))) |
| 428 | 168 |
| 169 /* If subrs take more than 8 arguments, more cases need to be added | |
| 170 to this switch. (But wait - don't do it - if you really need | |
| 171 a SUBR with more than 8 arguments, use max_args == MANY. | |
| 853 | 172 Or better, considering using a property list as one of your args. |
| 428 | 173 See the DEFUN macro in lisp.h) */ |
| 174 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \ | |
| 175 void (*PF_fn)(void) = (void (*)(void)) fn; \ | |
| 176 Lisp_Object *PF_av = (av); \ | |
| 177 switch (ac) \ | |
| 178 { \ | |
| 436 | 179 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \ |
| 428 | 180 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \ |
| 181 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \ | |
| 182 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \ | |
| 183 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \ | |
| 184 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \ | |
| 185 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \ | |
| 186 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \ | |
| 187 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \ | |
| 188 } \ | |
| 189 } while (0) | |
| 190 | |
| 191 #define FUNCALL_SUBR(rv, subr, av, ac) \ | |
| 192 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac); | |
| 193 | |
| 194 | |
| 195 /* This is the list of current catches (and also condition-cases). | |
| 853 | 196 This is a stack: the most recent catch is at the head of the list. |
| 197 The list is threaded through the stack frames of the C functions | |
| 198 that set up the catches; this is similar to the way the GCPRO list | |
| 199 is handled, but different from the condition-handler list (which is | |
| 200 a simple Lisp list) and the specbind stack, which is a contiguous | |
| 201 array of `struct specbinding's, grown (using realloc()) as | |
| 202 necessary. (Note that all four of these lists behave as a stacks.) | |
| 203 | |
| 3025 | 204 Catches are created by declaring a `struct catchtag' locally, |
| 853 | 205 filling the .TAG field in with the tag, and doing a setjmp() on |
| 206 .JMP. Fthrow() will store the value passed to it in .VAL and | |
| 207 longjmp() back to .JMP, back to the function that established the | |
| 208 catch. This will always be either internal_catch() (catches | |
| 209 established internally or through `catch') or condition_case_1 | |
| 210 (condition-cases established internally or through | |
| 211 `condition-case'). | |
| 428 | 212 |
| 213 The catchtag also records the current position in the | |
| 214 call stack (stored in BACKTRACE_LIST), the current position | |
| 215 in the specpdl stack (used for variable bindings and | |
| 216 unwind-protects), the value of LISP_EVAL_DEPTH, and the | |
| 217 current position in the GCPRO stack. All of these are | |
| 218 restored by Fthrow(). | |
| 853 | 219 */ |
| 428 | 220 |
| 221 struct catchtag *catchlist; | |
| 222 | |
| 853 | 223 /* A special tag that can be used internally from C code to catch |
| 224 every attempt to throw past this level. */ | |
| 225 Lisp_Object Vcatch_everything_tag; | |
| 226 | |
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227 Lisp_Object Qautoload, Qmacro, Qexit, Qdeclare; |
| 428 | 228 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues; |
| 229 Lisp_Object Vquit_flag, Vinhibit_quit; | |
| 230 Lisp_Object Qand_rest, Qand_optional; | |
| 231 Lisp_Object Qdebug_on_error, Qstack_trace_on_error; | |
| 232 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal; | |
| 233 Lisp_Object Qdebugger; | |
| 234 Lisp_Object Qinhibit_quit; | |
| 887 | 235 Lisp_Object Qfinalize_list; |
| 428 | 236 Lisp_Object Qrun_hooks; |
| 237 Lisp_Object Qsetq; | |
| 238 Lisp_Object Qdisplay_warning; | |
| 239 Lisp_Object Vpending_warnings, Vpending_warnings_tail; | |
| 240 Lisp_Object Qif; | |
| 241 | |
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242 Lisp_Object Qthrow; |
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243 Lisp_Object Qobsolete_throw; |
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244 Lisp_Object Qmultiple_value_list_internal; |
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245 |
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246 static int first_desired_multiple_value; |
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247 /* Used outside this file, somewhat uncleanly, in the IGNORE_MULTIPLE_VALUES |
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248 macro: */ |
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249 int multiple_value_current_limit; |
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250 |
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251 Fixnum Vmultiple_values_limit; |
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252 |
| 853 | 253 /* Flags specifying which operations are currently inhibited. */ |
| 254 int inhibit_flags; | |
| 255 | |
| 256 /* Buffers, frames, windows, devices, and consoles created since most | |
| 257 recent active | |
| 258 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION). | |
| 259 */ | |
| 260 Lisp_Object Vdeletable_permanent_display_objects; | |
| 261 | |
| 262 /* Buffers created since most recent active | |
| 263 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */ | |
| 264 Lisp_Object Vmodifiable_buffers; | |
| 793 | 265 |
| 266 /* Minimum level at which warnings are logged. Below this, they're ignored | |
| 267 entirely -- not even generated. */ | |
| 268 Lisp_Object Vlog_warning_minimum_level; | |
| 269 | |
| 428 | 270 /* Non-nil means record all fset's and provide's, to be undone |
| 271 if the file being autoloaded is not fully loaded. | |
| 272 They are recorded by being consed onto the front of Vautoload_queue: | |
| 273 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
| 274 Lisp_Object Vautoload_queue; | |
| 275 | |
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276 Lisp_Object Vmacro_declaration_function; |
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277 |
| 428 | 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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421 |
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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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Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1098 |
|
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diff
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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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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
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4657
diff
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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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Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
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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. | |
|
4642
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Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
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4624
diff
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|
1140 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
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4624
diff
changeset
|
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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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
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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Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
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. | |
|
4642
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Aidan Kehoe <kehoea@parhasard.net>
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4624
diff
changeset
|
1209 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
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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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
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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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
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changeset
|
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)'). | |
|
5265
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
changeset
|
1273 |
|
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
changeset
|
1274 arguments: (OBJECT) |
| 428 | 1275 */ |
| 1276 (args)) | |
| 1277 { | |
|
5207
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1278 int nargs; |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1279 |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1280 GET_LIST_LENGTH (args, nargs); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1281 if (nargs != 1) |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1282 { |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1283 Fsignal (Qwrong_number_of_arguments, |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1284 list2 (Qquote, make_int (nargs))); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1285 } |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1286 |
| 428 | 1287 return XCAR (args); |
| 1288 } | |
| 1289 | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1290 /* Originally, this was just a function -- but `custom' used a garden- |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1291 variety version, so why not make it a subr? */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1292 DEFUN ("quote-maybe", Fquote_maybe, 1, 1, 0, /* |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1293 Quote EXPR if it is not self quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1294 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1295 In contrast with `quote', this is a function, not a special form; its |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1296 argument is evaluated before `quote-maybe' is called. It returns either |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1297 EXPR (if it is self-quoting) or a list `(quote EXPR)' if it is not |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1298 self-quoting. Lists starting with the symbol `lambda' are regarded as |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1299 self-quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1300 */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1301 (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1302 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1303 if ((XTYPE (expr)) == Lisp_Type_Record) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1304 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1305 switch (XRECORD_LHEADER (expr)->type) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1306 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1307 case lrecord_type_symbol: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1308 if (NILP (expr) || (EQ (expr, Qt)) || SYMBOL_IS_KEYWORD (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1309 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1310 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1311 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1312 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1313 case lrecord_type_cons: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1314 if (EQ (XCAR (expr), Qlambda)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1315 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1316 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1317 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1318 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1319 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1320 case lrecord_type_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1321 case lrecord_type_string: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1322 case lrecord_type_compiled_function: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1323 case lrecord_type_bit_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1324 case lrecord_type_float: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1325 case lrecord_type_hash_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1326 case lrecord_type_char_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1327 case lrecord_type_range_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1328 case lrecord_type_bignum: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1329 case lrecord_type_ratio: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1330 case lrecord_type_bigfloat: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1331 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1332 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1333 return list2 (Qquote, expr); |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1334 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1335 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1336 /* Fixnums and characters are self-quoting: */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1337 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1338 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1339 |
| 428 | 1340 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /* |
| 3842 | 1341 Return the argument, without evaluating it. `(function x)' yields `x'. |
| 1342 | |
| 1343 `function' differs from `quote' in that it is a hint that an expression is | |
| 1344 a function, not data. In particular, under some circumstances the byte | |
| 1345 compiler will compile an expression quoted with `function', but it will | |
| 1346 never do so for an expression quoted with `quote'. However, the byte | |
| 1347 compiler will not compile an expression buried in a data structure such as | |
| 1348 a vector or a list which is not syntactically a function. These issues are | |
| 1349 most important for lambda expressions (see `lambda'). | |
| 1350 | |
| 1351 There is an alternative, more readable, reader syntax for `function': a Lisp | |
| 1352 object preceded by `#''. Thus, #'x is equivalent to (function x), in all | |
| 1353 contexts. A print function may use either. Internally the expression is | |
| 1354 represented as `(function x)'). | |
|
5265
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
changeset
|
1355 |
|
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
changeset
|
1356 arguments: (SYMBOL-OR-LAMBDA) |
| 428 | 1357 */ |
| 1358 (args)) | |
| 1359 { | |
|
5207
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1360 int nargs; |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1361 |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1362 GET_LIST_LENGTH (args, nargs); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1363 if (nargs != 1) |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1364 { |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1365 Fsignal (Qwrong_number_of_arguments, |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1366 list2 (Qfunction, make_int (nargs))); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1367 } |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1368 |
| 428 | 1369 return XCAR (args); |
| 1370 } | |
| 1371 | |
| 1372 | |
| 1373 /************************************************************************/ | |
| 1374 /* Defining functions/variables */ | |
| 1375 /************************************************************************/ | |
| 1376 static Lisp_Object | |
| 1377 define_function (Lisp_Object name, Lisp_Object defn) | |
| 1378 { | |
| 1379 Ffset (name, defn); | |
|
4535
69a1eda3da06
Distinguish vars and functions in #'symbol-file, #'describe-{function,variable}
Aidan Kehoe <kehoea@parhasard.net>
parents:
4502
diff
changeset
|
1380 LOADHIST_ATTACH (Fcons (Qdefun, name)); |
| 428 | 1381 return name; |
| 1382 } | |
| 1383 | |
| 1384 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /* | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1385 Define NAME as a function. |
| 428 | 1386 The definition is (lambda ARGLIST [DOCSTRING] BODY...). |
| 1387 See also the function `interactive'. | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1388 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1389 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1390 */ |
| 1391 (args)) | |
| 1392 { | |
| 1393 /* This function can GC */ | |
| 1394 return define_function (XCAR (args), | |
| 1395 Fcons (Qlambda, XCDR (args))); | |
| 1396 } | |
| 1397 | |
| 1398 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /* | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1399 Define NAME as a macro. |
| 428 | 1400 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). |
| 1401 When the macro is called, as in (NAME ARGS...), | |
| 1402 the function (lambda ARGLIST BODY...) is applied to | |
| 1403 the list ARGS... as it appears in the expression, | |
| 1404 and the result should be a form to be evaluated instead of the original. | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1405 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1406 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1407 */ |
| 1408 (args)) | |
| 1409 { | |
| 1410 /* This function can GC */ | |
|
5506
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1411 if (!NILP (Vmacro_declaration_function)) |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1412 { |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1413 Lisp_Object declare = Fnth (make_int (2), args); |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1414 |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1415 /* Sigh. This GNU interface is incompatible with the CL declare macro, |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1416 and the latter is much older. |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1417 |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1418 GNU describe this syntax in their docstrings. It's sufficiently |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1419 ugly in the XEmacs context (and in general, but ...) that I'm not |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1420 rushing to document it. |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1421 |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1422 The GNU interface accepts multiple (declare ...) sexps at the |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1423 beginning of a macro. Nothing uses this, and the XEmacs byte |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1424 compiler (will) warn(s) if it encounters code that attempts to use |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1425 it. */ |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1426 |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1427 if (STRINGP (declare)) |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1428 { |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1429 declare = Fnth (make_int (3), args); |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1430 } |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1431 |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1432 if (CONSP (declare) && EQ (Qdeclare, XCAR (declare))) |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1433 { |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1434 call2 (Vmacro_declaration_function, XCAR (args), declare); |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1435 } |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1436 } |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
1437 |
| 428 | 1438 return define_function (XCAR (args), |
| 1439 Fcons (Qmacro, Fcons (Qlambda, XCDR (args)))); | |
| 1440 } | |
| 1441 | |
| 1442 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /* | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
1443 Define SYMBOL as a variable. |
| 428 | 1444 You are not required to define a variable in order to use it, |
| 1445 but the definition can supply documentation and an initial value | |
| 1446 in a way that tags can recognize. | |
| 1447 | |
| 1448 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is | |
| 1449 void. (However, when you evaluate a defvar interactively, it acts like a | |
| 1450 defconst: SYMBOL's value is always set regardless of whether it's currently | |
| 1451 void.) | |
| 1452 If SYMBOL is buffer-local, its default value is what is set; | |
| 1453 buffer-local values are not affected. | |
| 1454 INITVALUE and DOCSTRING are optional. | |
| 1455 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1456 This means that M-x set-variable recognizes it. |
| 428 | 1457 If INITVALUE is missing, SYMBOL's value is not set. |
| 1458 | |
| 1459 In lisp-interaction-mode defvar is treated as defconst. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
1460 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
1461 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1462 */ |
| 1463 (args)) | |
| 1464 { | |
| 1465 /* This function can GC */ | |
| 1466 Lisp_Object sym = XCAR (args); | |
| 1467 | |
| 1468 if (!NILP (args = XCDR (args))) | |
| 1469 { | |
| 1470 Lisp_Object val = XCAR (args); | |
| 1471 | |
| 1472 if (NILP (Fdefault_boundp (sym))) | |
| 1473 { | |
| 1474 struct gcpro gcpro1; | |
| 1475 GCPRO1 (val); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
1476 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 1477 Fset_default (sym, val); |
| 1478 UNGCPRO; | |
| 1479 } | |
| 1480 | |
| 1481 if (!NILP (args = XCDR (args))) | |
| 1482 { | |
| 1483 Lisp_Object doc = XCAR (args); | |
| 1484 Fput (sym, Qvariable_documentation, doc); | |
| 1485 if (!NILP (args = XCDR (args))) | |
| 563 | 1486 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1487 } |
| 1488 } | |
| 1489 | |
| 1490 #ifdef I18N3 | |
| 1491 if (!NILP (Vfile_domain)) | |
| 1492 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1493 #endif | |
| 1494 | |
| 1495 LOADHIST_ATTACH (sym); | |
| 1496 return sym; | |
| 1497 } | |
| 1498 | |
| 1499 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /* | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
1500 Define SYMBOL as a constant variable. |
| 428 | 1501 The intent is that programs do not change this value, but users may. |
| 1502 Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
| 1503 If SYMBOL is buffer-local, its default value is what is set; | |
| 1504 buffer-local values are not affected. | |
| 1505 DOCSTRING is optional. | |
| 1506 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1507 This means that M-x set-variable recognizes it. |
| 428 | 1508 |
| 1509 Note: do not use `defconst' for user options in libraries that are not | |
| 1510 normally loaded, since it is useful for users to be able to specify | |
| 1511 their own values for such variables before loading the library. | |
| 1512 Since `defconst' unconditionally assigns the variable, | |
| 1513 it would override the user's choice. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
1514 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
1515 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1516 */ |
| 1517 (args)) | |
| 1518 { | |
| 1519 /* This function can GC */ | |
| 1520 Lisp_Object sym = XCAR (args); | |
| 1521 Lisp_Object val = Feval (XCAR (args = XCDR (args))); | |
| 1522 struct gcpro gcpro1; | |
| 1523 | |
| 1524 GCPRO1 (val); | |
| 1525 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
1526 val = IGNORE_MULTIPLE_VALUES (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
1527 |
| 428 | 1528 Fset_default (sym, val); |
| 1529 | |
| 1530 UNGCPRO; | |
| 1531 | |
| 1532 if (!NILP (args = XCDR (args))) | |
| 1533 { | |
| 1534 Lisp_Object doc = XCAR (args); | |
| 1535 Fput (sym, Qvariable_documentation, doc); | |
| 1536 if (!NILP (args = XCDR (args))) | |
| 563 | 1537 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1538 } |
| 1539 | |
| 1540 #ifdef I18N3 | |
| 1541 if (!NILP (Vfile_domain)) | |
| 1542 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1543 #endif | |
| 1544 | |
| 1545 LOADHIST_ATTACH (sym); | |
| 1546 return sym; | |
| 1547 } | |
| 1548 | |
|
4502
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4162
diff
changeset
|
1549 /* XEmacs: user-variable-p is in symbols.c, since it needs to mess around |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4162
diff
changeset
|
1550 with the symbol variable aliases. */ |
| 428 | 1551 |
| 1552 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /* | |
| 1553 Return result of expanding macros at top level of FORM. | |
| 1554 If FORM is not a macro call, it is returned unchanged. | |
| 1555 Otherwise, the macro is expanded and the expansion is considered | |
| 1556 in place of FORM. When a non-macro-call results, it is returned. | |
| 1557 | |
| 442 | 1558 The second optional arg ENVIRONMENT specifies an environment of macro |
| 428 | 1559 definitions to shadow the loaded ones for use in file byte-compilation. |
| 1560 */ | |
| 442 | 1561 (form, environment)) |
| 428 | 1562 { |
| 1563 /* This function can GC */ | |
| 1564 /* With cleanups from Hallvard Furuseth. */ | |
| 1565 REGISTER Lisp_Object expander, sym, def, tem; | |
| 1566 | |
| 1567 while (1) | |
| 1568 { | |
| 1569 /* Come back here each time we expand a macro call, | |
| 1570 in case it expands into another macro call. */ | |
| 1571 if (!CONSP (form)) | |
| 1572 break; | |
| 1573 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ | |
| 1574 def = sym = XCAR (form); | |
| 1575 tem = Qnil; | |
| 1576 /* Trace symbols aliases to other symbols | |
| 1577 until we get a symbol that is not an alias. */ | |
| 1578 while (SYMBOLP (def)) | |
| 1579 { | |
| 1580 QUIT; | |
| 1581 sym = def; | |
| 442 | 1582 tem = Fassq (sym, environment); |
| 428 | 1583 if (NILP (tem)) |
| 1584 { | |
| 1585 def = XSYMBOL (sym)->function; | |
| 1586 if (!UNBOUNDP (def)) | |
| 1587 continue; | |
| 1588 } | |
| 1589 break; | |
| 1590 } | |
| 442 | 1591 /* Right now TEM is the result from SYM in ENVIRONMENT, |
| 428 | 1592 and if TEM is nil then DEF is SYM's function definition. */ |
| 1593 if (NILP (tem)) | |
| 1594 { | |
| 442 | 1595 /* SYM is not mentioned in ENVIRONMENT. |
| 428 | 1596 Look at its function definition. */ |
| 1597 if (UNBOUNDP (def) | |
| 1598 || !CONSP (def)) | |
| 1599 /* Not defined or definition not suitable */ | |
| 1600 break; | |
| 1601 if (EQ (XCAR (def), Qautoload)) | |
| 1602 { | |
| 1603 /* Autoloading function: will it be a macro when loaded? */ | |
| 1604 tem = Felt (def, make_int (4)); | |
| 1605 if (EQ (tem, Qt) || EQ (tem, Qmacro)) | |
| 1606 { | |
| 1607 /* Yes, load it and try again. */ | |
| 970 | 1608 /* do_autoload GCPROs both arguments */ |
| 428 | 1609 do_autoload (def, sym); |
| 1610 continue; | |
| 1611 } | |
| 1612 else | |
| 1613 break; | |
| 1614 } | |
| 1615 else if (!EQ (XCAR (def), Qmacro)) | |
| 1616 break; | |
| 1617 else expander = XCDR (def); | |
| 1618 } | |
| 1619 else | |
| 1620 { | |
| 1621 expander = XCDR (tem); | |
| 1622 if (NILP (expander)) | |
| 1623 break; | |
| 1624 } | |
| 1625 form = apply1 (expander, XCDR (form)); | |
| 1626 } | |
| 1627 return form; | |
| 1628 } | |
| 1629 | |
| 1630 | |
| 1631 /************************************************************************/ | |
| 1632 /* Non-local exits */ | |
| 1633 /************************************************************************/ | |
| 1634 | |
| 1318 | 1635 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1636 | |
| 1637 int | |
| 1638 proper_redisplay_wrapping_in_place (void) | |
| 1639 { | |
| 1640 return !in_display | |
| 1641 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS) | |
| 1642 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS)); | |
| 1643 } | |
| 1644 | |
| 1645 static void | |
| 1646 check_proper_critical_section_nonlocal_exit_protection (void) | |
| 1647 { | |
| 1648 assert_with_message | |
| 1649 (proper_redisplay_wrapping_in_place (), | |
| 1650 "Attempted non-local exit from within redisplay without being properly wrapped"); | |
| 1651 } | |
| 1652 | |
| 1653 static void | |
| 1654 check_proper_critical_section_lisp_protection (void) | |
| 1655 { | |
| 1656 assert_with_message | |
| 1657 (proper_redisplay_wrapping_in_place (), | |
| 1658 "Attempt to call Lisp code from within redisplay without being properly wrapped"); | |
| 1659 } | |
| 1660 | |
| 1661 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */ | |
| 1662 | |
| 428 | 1663 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /* |
|
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1664 Eval BODY allowing nonlocal exits using `throw'. |
| 428 | 1665 TAG is evalled to get the tag to use. Then the BODY is executed. |
| 3577 | 1666 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'. |
| 428 | 1667 If no throw happens, `catch' returns the value of the last BODY form. |
| 1668 If a throw happens, it specifies the value to return from `catch'. | |
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1669 |
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1670 arguments: (TAG &rest BODY) |
| 428 | 1671 */ |
| 1672 (args)) | |
| 1673 { | |
| 1674 /* This function can GC */ | |
| 1675 Lisp_Object tag = Feval (XCAR (args)); | |
| 1676 Lisp_Object body = XCDR (args); | |
| 2532 | 1677 return internal_catch (tag, Fprogn, body, 0, 0, 0); |
| 428 | 1678 } |
| 1679 | |
| 1680 /* Set up a catch, then call C function FUNC on argument ARG. | |
| 1681 FUNC should return a Lisp_Object. | |
| 1682 This is how catches are done from within C code. */ | |
| 1683 | |
| 1684 Lisp_Object | |
| 1685 internal_catch (Lisp_Object tag, | |
| 1686 Lisp_Object (*func) (Lisp_Object arg), | |
| 1687 Lisp_Object arg, | |
| 853 | 1688 int * volatile threw, |
| 2532 | 1689 Lisp_Object * volatile thrown_tag, |
| 1690 Lisp_Object * volatile backtrace_before_throw) | |
| 428 | 1691 { |
| 1692 /* This structure is made part of the chain `catchlist'. */ | |
| 1693 struct catchtag c; | |
| 1694 | |
| 1695 /* Fill in the components of c, and put it on the list. */ | |
| 1696 c.next = catchlist; | |
| 1697 c.tag = tag; | |
| 853 | 1698 c.actual_tag = Qnil; |
| 2532 | 1699 c.backtrace = Qnil; |
| 428 | 1700 c.val = Qnil; |
| 1701 c.backlist = backtrace_list; | |
| 1702 #if 0 /* FSFmacs */ | |
| 1703 /* #### */ | |
| 1704 c.handlerlist = handlerlist; | |
| 1705 #endif | |
| 1706 c.lisp_eval_depth = lisp_eval_depth; | |
| 1707 c.pdlcount = specpdl_depth(); | |
| 1708 #if 0 /* FSFmacs */ | |
| 1709 c.poll_suppress_count = async_timer_suppress_count; | |
| 1710 #endif | |
| 1711 c.gcpro = gcprolist; | |
| 1712 catchlist = &c; | |
| 1713 | |
| 1714 /* Call FUNC. */ | |
| 1715 if (SETJMP (c.jmp)) | |
| 1716 { | |
| 1717 /* Throw works by a longjmp that comes right here. */ | |
| 1718 if (threw) *threw = 1; | |
| 853 | 1719 if (thrown_tag) *thrown_tag = c.actual_tag; |
| 2532 | 1720 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace; |
| 428 | 1721 return c.val; |
| 1722 } | |
| 1723 c.val = (*func) (arg); | |
| 1724 if (threw) *threw = 0; | |
| 853 | 1725 if (thrown_tag) *thrown_tag = Qnil; |
| 428 | 1726 catchlist = c.next; |
| 853 | 1727 check_catchlist_sanity (); |
| 428 | 1728 return c.val; |
| 1729 } | |
| 1730 | |
| 1731 | |
| 1732 /* Unwind the specbind, catch, and handler stacks back to CATCH, and | |
| 1733 jump to that CATCH, returning VALUE as the value of that catch. | |
| 1734 | |
| 2297 | 1735 This is the guts of Fthrow and Fsignal; they differ only in the |
| 1736 way they choose the catch tag to throw to. A catch tag for a | |
| 428 | 1737 condition-case form has a TAG of Qnil. |
| 1738 | |
| 1739 Before each catch is discarded, unbind all special bindings and | |
| 1740 execute all unwind-protect clauses made above that catch. Unwind | |
| 1741 the handler stack as we go, so that the proper handlers are in | |
| 1742 effect for each unwind-protect clause we run. At the end, restore | |
| 1743 some static info saved in CATCH, and longjmp to the location | |
| 1744 specified in the | |
| 1745 | |
| 1746 This is used for correct unwinding in Fthrow and Fsignal. */ | |
| 1747 | |
| 2268 | 1748 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object, |
| 1749 Lisp_Object)); | |
| 1750 | |
| 1751 static DOESNT_RETURN | |
| 853 | 1752 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag) |
| 428 | 1753 { |
| 1754 REGISTER int last_time; | |
| 1755 | |
| 1756 /* Unwind the specbind, catch, and handler stacks back to CATCH | |
| 1757 Before each catch is discarded, unbind all special bindings | |
| 1758 and execute all unwind-protect clauses made above that catch. | |
| 1759 At the end, restore some static info saved in CATCH, | |
| 1760 and longjmp to the location specified. | |
| 1761 */ | |
| 1762 | |
| 1763 /* Save the value somewhere it will be GC'ed. | |
| 1764 (Can't overwrite tag slot because an unwind-protect may | |
| 1765 want to throw to this same tag, which isn't yet invalid.) */ | |
| 1766 c->val = val; | |
| 853 | 1767 c->actual_tag = tag; |
| 428 | 1768 |
| 1769 #if 0 /* FSFmacs */ | |
| 1770 /* Restore the polling-suppression count. */ | |
| 1771 set_poll_suppress_count (catch->poll_suppress_count); | |
| 1772 #endif | |
| 1773 | |
| 617 | 1774 #if 1 |
| 428 | 1775 do |
| 1776 { | |
| 1777 last_time = catchlist == c; | |
| 1778 | |
| 1779 /* Unwind the specpdl stack, and then restore the proper set of | |
| 1780 handlers. */ | |
| 771 | 1781 unbind_to (catchlist->pdlcount); |
| 428 | 1782 catchlist = catchlist->next; |
| 853 | 1783 check_catchlist_sanity (); |
| 428 | 1784 } |
| 1785 while (! last_time); | |
| 617 | 1786 #else |
| 1787 /* Former XEmacs code. This is definitely not as correct because | |
| 1788 there may be a number of catches we're unwinding, and a number | |
| 1789 of unwind-protects in the process. By not undoing the catches till | |
| 1790 the end, there may be invalid catches still current. (This would | |
| 1791 be a particular problem with code like this: | |
| 1792 | |
| 1793 (catch 'foo | |
| 1794 (call-some-code-which-does... | |
| 1795 (catch 'bar | |
| 1796 (unwind-protect | |
| 1797 (call-some-code-which-does... | |
| 1798 (catch 'bar | |
| 1799 (call-some-code-which-does... | |
| 1800 (throw 'foo nil)))) | |
| 1801 (throw 'bar nil))))) | |
| 1802 | |
| 1803 This would try to throw to the inner (catch 'bar)! | |
| 1804 | |
| 1805 --ben | |
| 1806 */ | |
| 428 | 1807 /* Unwind the specpdl stack */ |
| 771 | 1808 unbind_to (c->pdlcount); |
| 428 | 1809 catchlist = c->next; |
| 853 | 1810 check_catchlist_sanity (); |
| 617 | 1811 #endif /* Former code */ |
| 428 | 1812 |
| 1204 | 1813 UNWIND_GCPRO_TO (c->gcpro); |
| 1292 | 1814 if (profiling_active) |
| 1815 { | |
| 1816 while (backtrace_list != c->backlist) | |
| 1817 { | |
| 1818 profile_record_unwind (backtrace_list); | |
| 1819 backtrace_list = backtrace_list->next; | |
| 1820 } | |
| 1821 } | |
| 1822 else | |
| 1823 backtrace_list = c->backlist; | |
| 428 | 1824 lisp_eval_depth = c->lisp_eval_depth; |
| 1825 | |
| 442 | 1826 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1827 throw_level = 0; |
| 1828 #endif | |
| 1829 LONGJMP (c->jmp, 1); | |
| 1830 } | |
| 1831 | |
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1832 DECLARE_DOESNT_RETURN (throw_or_bomb_out_unsafe (Lisp_Object, Lisp_Object, int, |
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1833 Lisp_Object, Lisp_Object)); |
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1834 |
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1835 DOESNT_RETURN |
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1836 throw_or_bomb_out_unsafe (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
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1837 Lisp_Object sig, Lisp_Object data) |
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1838 { |
| 428 | 1839 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1840 "last resort" when there is no handler for this error and | |
| 1841 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1842 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1843 initialization stages) we would get in an infinite recursive |
| 1844 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1845 really-early-error-handler. | |
| 1846 | |
| 1847 Note that in fact the only time that the "last resort" | |
| 3025 | 1848 occurs is when there's no catch for `top-level' -- the |
| 1849 `top-level' catch and the catch-all error handler are | |
| 428 | 1850 established at the same time, in initial_command_loop/ |
| 1851 top_level_1. | |
| 1852 | |
| 853 | 1853 [[#### Fix this horrifitude!]] |
| 1854 | |
| 1855 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1856 */ |
| 1857 | |
| 1858 while (1) | |
| 1859 { | |
| 1860 REGISTER struct catchtag *c; | |
| 1861 | |
| 1862 #if 0 /* FSFmacs */ | |
| 1863 if (!NILP (tag)) /* #### */ | |
| 1864 #endif | |
| 1865 for (c = catchlist; c; c = c->next) | |
| 1866 { | |
| 2532 | 1867 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1868 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1869 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1870 unwind_to_catch (c, val, tag); | |
| 428 | 1871 } |
| 1872 if (!bomb_out_p) | |
| 1873 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1874 else | |
| 1875 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1876 } | |
| 1877 } | |
|
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1878 |
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1879 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
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1880 Lisp_Object, Lisp_Object)); |
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1881 |
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1882 DOESNT_RETURN |
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1883 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
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1884 Lisp_Object sig, Lisp_Object data) |
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1885 { |
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1886 #ifdef DEFEND_AGAINST_THROW_RECURSION |
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1887 /* die if we recurse more than is reasonable */ |
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1888 assert (++throw_level <= 20); |
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1889 #endif |
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1890 |
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1891 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
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1892 check_proper_critical_section_nonlocal_exit_protection (); |
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1893 #endif |
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1894 throw_or_bomb_out_unsafe (tag, val, bomb_out_p, sig, data); |
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1895 } |
| 428 | 1896 |
| 1897 /* See above, where CATCHLIST is defined, for a description of how | |
| 1898 Fthrow() works. | |
| 1899 | |
| 1900 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1901 back to the appropriate condition-case handler after (maybe) | |
| 1902 the debugger is entered. In that case, TAG is the value | |
| 1903 of Vcondition_handlers that was in place just after the | |
| 1904 condition-case handler was set up. The car of this will be | |
| 1905 some data referring to the handler: Its car will be Qunbound | |
| 1906 (thus, this tag can never be generated by Lisp code), and | |
| 1907 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1908 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1909 This works fine because Fthrow() does not care what TAG was | |
| 1910 passed to it: it just looks up the catch list for something | |
| 1911 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1912 back to the place that established the catch (in this case, | |
| 1913 condition_case_1). See below for more info. | |
| 1914 */ | |
| 1915 | |
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1916 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1917 Throw to the catch for TAG and return VALUE from it. |
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1918 |
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1919 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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1920 back. Tags are the same if and only if they are `eq'. |
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1921 |
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1922 arguments: (TAG VALUE) |
| 428 | 1923 */ |
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1924 (args)) |
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1925 { |
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1926 int nargs; |
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1927 Lisp_Object tag, value; |
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1928 |
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1929 GET_LIST_LENGTH (args, nargs); |
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1930 if (nargs != 2) |
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1931 { |
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1932 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1933 } |
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1934 |
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1935 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1936 |
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1937 value = Feval (XCAR (XCDR (args))); |
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4657
diff
changeset
|
1938 |
| 444 | 1939 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1940 RETURN_NOT_REACHED (Qnil); |
| 428 | 1941 } |
| 1942 | |
| 1943 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1944 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1945 If BODYFORM completes normally, its value is returned | |
| 1946 after executing the UNWINDFORMS. | |
| 1947 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
|
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parents:
4686
diff
changeset
|
1948 |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1949 arguments: (BODYFORM &rest UNWINDFORMS) |
| 428 | 1950 */ |
| 1951 (args)) | |
| 1952 { | |
| 1953 /* This function can GC */ | |
| 1954 int speccount = specpdl_depth(); | |
| 1955 | |
| 1956 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1957 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1958 } |
| 1959 | |
| 1960 | |
| 1961 /************************************************************************/ | |
| 1292 | 1962 /* Trapping errors */ |
| 428 | 1963 /************************************************************************/ |
| 1964 | |
| 1965 static Lisp_Object | |
| 1966 condition_bind_unwind (Lisp_Object loser) | |
| 1967 { | |
| 617 | 1968 /* There is no problem freeing stuff here like there is in |
| 1969 condition_case_unwind(), because there are no outside pointers | |
| 1970 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1971 |
| 428 | 1972 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1973 Lisp_Object tem = XCAR (loser); | |
| 853 | 1974 int first = 1; |
| 428 | 1975 |
| 1976 while (CONSP (tem)) | |
| 1977 { | |
| 853 | 1978 Lisp_Object victim = tem; |
| 1979 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1980 free_opaque_ptr (XCAR (victim)); | |
| 1981 first = 0; | |
| 1982 tem = XCDR (victim); | |
| 428 | 1983 free_cons (victim); |
| 1984 } | |
| 1985 | |
| 1986 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1987 Vcondition_handlers = XCDR (loser); |
| 1988 | |
| 1989 free_cons (loser); | |
| 428 | 1990 return Qnil; |
| 1991 } | |
| 1992 | |
| 1993 static Lisp_Object | |
| 1994 condition_case_unwind (Lisp_Object loser) | |
| 1995 { | |
| 1996 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1997 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1998 catch. With the recent changes to unwind_to_catch(), the | |
| 1999 evil situation might not happen any more; it certainly could | |
| 2000 happen before because it did. But it's very precarious to rely | |
| 2001 on something like this. #### Instead we should rewrite, adopting | |
| 2002 the FSF's mechanism with a struct handler instead of | |
| 2003 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 2004 to hold all of the values, and there's no possibility either of | |
| 2005 crashes from freeing objects too quickly, or objects not getting | |
| 2006 freed and hanging around till the next GC. | |
| 2007 | |
| 2008 In practice, the extra consing here should not matter because | |
| 2009 it only happens when we throw past the condition-case, which almost | |
| 2010 always is the result of an error. Most of the time, there will be | |
| 2011 no error, and we will free the objects below in the main function. | |
| 2012 | |
| 2013 --ben | |
| 2014 | |
| 2015 DO NOT DO: free_cons (XCAR (loser)); | |
| 2016 */ | |
| 2017 | |
| 428 | 2018 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 2019 Vcondition_handlers = XCDR (loser); |
| 2020 | |
| 2021 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 2022 return Qnil; |
| 2023 } | |
| 2024 | |
| 2025 /* Split out from condition_case_3 so that primitive C callers | |
| 2026 don't have to cons up a lisp handler form to be evaluated. */ | |
| 2027 | |
| 2028 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 2029 specified by HANDLERS. If no error occurs that is indicated by | |
| 2030 HANDLERS as something to be caught, the return value of this | |
| 2031 function is the return value from BFUN. If such an error does | |
| 2032 occur, HFUN is called, and its return value becomes the | |
| 2033 return value of condition_case_1(). The second argument passed | |
| 2034 to HFUN will always be HARG. The first argument depends on | |
| 2035 HANDLERS: | |
| 2036 | |
| 2037 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 2038 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 2039 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 2040 arguments passed to `signal'. The debugger is not invoked even if | |
| 2041 `debug-on-error' was set. | |
| 2042 | |
| 2043 A HANDLERS value of Qerror is the same as Qt except that the | |
| 2044 debugger is invoked if `debug-on-error' was set. | |
| 2045 | |
| 2046 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 2047 exactly as in `condition-case', and errors will be trapped | |
| 2048 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 2049 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 2050 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 2051 | |
| 2052 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 2053 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 2054 for why), establishes a catch whose tag is this new value of | |
| 2055 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 2056 it calls Fthrow(), setting TAG to this same new value of | |
| 2057 Vcondition_handlers and setting VAL to the same thing that will | |
| 2058 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 2059 jump point we just established, and we in turn just call the | |
| 2060 HFUN and return its value. | |
| 2061 | |
| 2062 For a real condition-case, HFUN will always be | |
| 2063 run_condition_case_handlers() and HARG is the argument VAR | |
| 2064 to condition-case. That function just binds VAR to the cons | |
| 2065 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 2066 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 2067 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 2068 it had *before* condition_case_1() was called. This maintains | |
| 2069 consistency (so that the state of things at exit of | |
| 2070 condition_case_1() is the same as at entry), and implies | |
| 2071 that the handler can signal the same error again (possibly | |
| 2072 after processing of its own), without getting in an infinite | |
| 2073 loop. */ | |
| 2074 | |
| 2075 Lisp_Object | |
| 2076 condition_case_1 (Lisp_Object handlers, | |
| 2077 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 2078 Lisp_Object barg, | |
| 2079 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 2080 Lisp_Object harg) | |
| 2081 { | |
| 2082 int speccount = specpdl_depth(); | |
| 2083 struct catchtag c; | |
| 617 | 2084 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 2085 |
| 2086 #if 0 /* FSFmacs */ | |
| 2087 c.tag = Qnil; | |
| 2088 #else | |
| 2089 /* Do consing now so out-of-memory error happens up front */ | |
| 2090 /* (unbound . stuff) is a special condition-case kludge marker | |
| 2091 which is known specially by Fsignal. | |
| 617 | 2092 [[ This is an abomination, but to fix it would require either |
| 428 | 2093 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 2094 or changing the byte-compiler output (no thanks).]] |
| 2095 | |
| 2096 The above comment is clearly wrong. FSF does not do it this way | |
| 2097 and did not change the byte-compiler output. Instead they use a | |
| 2098 `struct handler' to hold the various values (in place of our | |
| 2099 Vcondition_handlers) and chain them together, with pointers from | |
| 2100 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 2101 consider moving to something similar, but not before I merge my | |
| 2102 stderr-proc workspace, which contains changes to these | |
| 2103 functions. --ben */ | |
| 428 | 2104 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 2105 Vcondition_handlers); | |
| 2106 #endif | |
| 2107 c.val = Qnil; | |
| 853 | 2108 c.actual_tag = Qnil; |
| 2532 | 2109 c.backtrace = Qnil; |
| 428 | 2110 c.backlist = backtrace_list; |
| 2111 #if 0 /* FSFmacs */ | |
| 2112 /* #### */ | |
| 2113 c.handlerlist = handlerlist; | |
| 2114 #endif | |
| 2115 c.lisp_eval_depth = lisp_eval_depth; | |
| 2116 c.pdlcount = specpdl_depth(); | |
| 2117 #if 0 /* FSFmacs */ | |
| 2118 c.poll_suppress_count = async_timer_suppress_count; | |
| 2119 #endif | |
| 2120 c.gcpro = gcprolist; | |
| 2121 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 2122 c.next = catchlist; | |
| 2123 | |
| 2124 if (SETJMP (c.jmp)) | |
| 2125 { | |
| 2126 /* throw does ungcpro, etc */ | |
| 2127 return (*hfun) (c.val, harg); | |
| 2128 } | |
| 2129 | |
| 2130 record_unwind_protect (condition_case_unwind, c.tag); | |
| 2131 | |
| 2132 catchlist = &c; | |
| 2133 #if 0 /* FSFmacs */ | |
| 2134 h.handler = handlers; | |
| 2135 h.var = Qnil; | |
| 2136 h.next = handlerlist; | |
| 2137 h.tag = &c; | |
| 2138 handlerlist = &h; | |
| 2139 #else | |
| 2140 Vcondition_handlers = c.tag; | |
| 2141 #endif | |
| 2142 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2143 c.val = ((*bfun) (barg)); | |
| 2144 UNGCPRO; | |
| 617 | 2145 |
| 2146 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2147 GCPRO3 (harg, c.val, c.tag); | |
| 2148 | |
| 428 | 2149 catchlist = c.next; |
| 853 | 2150 check_catchlist_sanity (); |
| 617 | 2151 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2152 delete this here. */ | |
| 428 | 2153 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2154 unbind_to (speccount); |
| 617 | 2155 |
| 2156 UNGCPRO; | |
| 2157 /* free the conses *after* the unbind, because the unbind will run | |
| 2158 condition_case_unwind above. */ | |
| 853 | 2159 free_cons (XCAR (c.tag)); |
| 2160 free_cons (c.tag); | |
| 617 | 2161 return c.val; |
| 428 | 2162 } |
| 2163 | |
| 2164 static Lisp_Object | |
| 2165 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2166 { | |
| 2167 /* This function can GC */ | |
| 2168 #if 0 /* FSFmacs */ | |
| 2169 if (!NILP (h.var)) | |
| 2170 specbind (h.var, c.val); | |
| 2171 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2172 | |
| 2173 /* Note that this just undoes the binding of h.var; whoever | |
| 2174 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2175 throwing. */ | |
| 771 | 2176 unbind_to (c.pdlcount); |
| 428 | 2177 return val; |
| 2178 #else | |
| 2179 int speccount; | |
| 2180 | |
| 2181 CHECK_TRUE_LIST (val); | |
| 2182 if (NILP (var)) | |
| 2183 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2184 | |
| 2185 speccount = specpdl_depth(); | |
| 2186 specbind (var, Fcar (val)); | |
| 2187 val = Fprogn (Fcdr (val)); | |
| 771 | 2188 return unbind_to_1 (speccount, val); |
| 428 | 2189 #endif |
| 2190 } | |
| 2191 | |
| 2192 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2193 condition-case except that it takes three arguments rather | |
| 2194 than a single list of arguments. */ | |
| 2195 Lisp_Object | |
| 2196 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2197 { | |
| 2198 /* This function can GC */ | |
| 2199 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2200 { | |
| 2201 if (NILP (handler)) | |
| 2202 ; | |
| 2203 else if (CONSP (handler)) | |
| 2204 { | |
| 2205 Lisp_Object conditions = XCAR (handler); | |
| 2206 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2207 if (SYMBOLP (conditions)) | |
| 2208 ; | |
| 2209 else | |
| 2210 { | |
| 2211 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2212 if (!SYMBOLP (condition)) | |
| 2213 goto invalid_condition_handler; | |
| 2214 } | |
| 2215 } | |
| 2216 else | |
| 2217 { | |
| 2218 invalid_condition_handler: | |
| 563 | 2219 sferror ("Invalid condition handler", handler); |
| 428 | 2220 } |
| 2221 } | |
| 2222 | |
| 2223 CHECK_SYMBOL (var); | |
| 2224 | |
| 2225 return condition_case_1 (handlers, | |
| 2226 Feval, bodyform, | |
| 2227 run_condition_case_handlers, | |
| 2228 var); | |
| 2229 } | |
| 2230 | |
| 2231 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2232 Regain control when an error is signalled. | |
| 2233 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2234 Executes BODYFORM and returns its value if no error happens. | |
| 2235 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2236 where the BODY is made of Lisp expressions. | |
| 2237 | |
| 771 | 2238 A typical usage of `condition-case' looks like this: |
| 2239 | |
| 2240 (condition-case nil | |
| 2241 ;; you need a progn here if you want more than one statement ... | |
| 2242 (progn | |
| 2243 (do-something) | |
| 2244 (do-something-else)) | |
| 2245 (error | |
| 2246 (issue-warning-or) | |
| 2247 ;; but strangely, you don't need one here. | |
| 2248 (return-a-value-etc) | |
| 2249 )) | |
| 2250 | |
| 428 | 2251 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2252 error's condition names. If an error happens, the first applicable | |
| 2253 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2254 all errors, even those without the `error' condition name on them | |
| 2255 \(e.g. `quit'). | |
| 2256 | |
| 2257 The car of a handler may be a list of condition names | |
| 2258 instead of a single condition name. | |
| 2259 | |
| 2260 When a handler handles an error, | |
| 2261 control returns to the condition-case and the handler BODY... is executed | |
| 2262 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2263 VAR may be nil; then you do not get access to the signal information. | |
| 2264 | |
| 2265 The value of the last BODY form is returned from the condition-case. | |
| 2266 See also the function `signal' for more info. | |
| 2267 | |
| 2268 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2269 and the current catches, condition-cases, and bindings have all been | |
| 2270 popped back to the state they were in just before the call to | |
| 2271 `condition-case'. This means that resignalling the error from | |
| 2272 within the handler will not result in an infinite loop. | |
| 2273 | |
| 2274 If you want to establish an error handler that is called with the | |
| 2275 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2276 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2277 */ | |
| 2278 (args)) | |
| 2279 { | |
| 2280 /* This function can GC */ | |
| 2281 Lisp_Object var = XCAR (args); | |
| 2282 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2283 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2284 return condition_case_3 (bodyform, var, handlers); | |
| 2285 } | |
| 2286 | |
| 2287 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2288 Call FUNCTION with arguments ARGS, regaining control on error. |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2289 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2290 This function is similar to `condition-case', but HANDLER is invoked |
| 428 | 2291 with the same environment (Lisp stack, bindings, catches, condition-cases) |
| 2292 that was current when `signal' was called, rather than when the handler | |
| 2293 was established. | |
| 2294 | |
| 2295 HANDLER should be a function of one argument, which is a cons of the args | |
| 2296 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2297 `signal' is called (this differs from `condition-case', which allows | |
| 2298 you to specify which errors are trapped). If the handler function | |
| 2299 returns, `signal' continues as if the handler were never invoked. | |
| 2300 \(It continues to look for handlers established earlier than this one, | |
| 2301 and invokes the standard error-handler if none is found.) | |
|
4693
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2302 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2303 arguments: (HANDLER FUNCTION &rest ARGS) |
| 428 | 2304 */ |
| 2305 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2306 { | |
| 2307 /* This function can GC */ | |
| 2308 int speccount = specpdl_depth(); | |
| 2309 Lisp_Object tem; | |
| 2310 | |
| 853 | 2311 tem = Ffunction_max_args (args[0]); |
| 2312 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2313 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2314 invalid_argument ("Must be function of one argument", args[0]); | |
| 2315 | |
| 2316 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2317 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2318 record_unwind_protect (condition_bind_unwind, tem); | |
| 2319 Vcondition_handlers = tem; | |
| 2320 | |
| 2321 /* Caller should have GC-protected args */ | |
| 771 | 2322 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2323 } |
| 2324 | |
| 853 | 2325 /* This is the C version of the above function. It calls FUN, passing it |
| 2326 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2327 which they were signalled. (HANDLER is only invoked if there was no | |
| 2328 handler (either from condition-case or call-with-condition-handler) set | |
| 2329 later on that handled the signal; therefore, this is a real error. | |
| 2330 | |
| 2331 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2332 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2333 ARG be void * to facilitate passing structures, but I changed to | |
| 2334 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2335 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2336 to convert between Lisp_Objects and structure pointers. */ | |
| 2337 | |
| 2338 Lisp_Object | |
| 2339 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2340 Lisp_Object), | |
| 2341 Lisp_Object handler_arg, | |
| 2342 Lisp_Object (*fun) (Lisp_Object), | |
| 2343 Lisp_Object arg) | |
| 2344 { | |
| 2345 /* This function can GC */ | |
| 1111 | 2346 int speccount = specpdl_depth (); |
| 853 | 2347 Lisp_Object tem; |
| 2348 | |
| 2349 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2350 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2351 noseeum_cons (handler_arg, Qnil)), |
| 2352 Vcondition_handlers); | |
| 2353 record_unwind_protect (condition_bind_unwind, tem); | |
| 2354 Vcondition_handlers = tem; | |
| 2355 | |
| 2356 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2357 } | |
| 2358 | |
| 428 | 2359 static int |
| 2360 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2361 { | |
| 2362 if (EQ (type, Qt)) | |
| 2363 /* (condition-case c # (t c)) catches -all- signals | |
| 2364 * Use with caution! */ | |
| 2365 return 1; | |
| 2366 | |
| 2367 if (SYMBOLP (type)) | |
| 2368 return !NILP (Fmemq (type, conditions)); | |
| 2369 | |
| 2370 for (; CONSP (type); type = XCDR (type)) | |
| 2371 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2372 return 1; | |
| 2373 | |
| 2374 return 0; | |
| 2375 } | |
| 2376 | |
| 2377 static Lisp_Object | |
| 2378 return_from_signal (Lisp_Object value) | |
| 2379 { | |
| 2380 #if 1 | |
| 2381 /* Most callers are not prepared to handle gc if this | |
| 2382 returns. So, since this feature is not very useful, | |
| 2383 take it out. */ | |
| 2384 /* Have called debugger; return value to signaller */ | |
| 2385 return value; | |
| 2386 #else /* But the reality is that that stinks, because: */ | |
| 2387 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2388 to be continuable!! */ | |
| 563 | 2389 signal_error (Qunimplemented, |
| 2390 "Returning a value from an error is no longer supported", | |
| 2391 Qunbound); | |
| 428 | 2392 #endif |
| 2393 } | |
| 2394 | |
| 2395 | |
| 2396 /************************************************************************/ | |
| 2397 /* the workhorse error-signaling function */ | |
| 2398 /************************************************************************/ | |
| 2399 | |
| 853 | 2400 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2401 that won't get signalled for errors occurring when | |
| 2402 call_with_suspended_errors() was invoked. */ | |
| 2403 | |
| 872 | 2404 /* Don't make static or it might be compiled away */ |
| 2405 void signal_1 (void); | |
| 2406 | |
| 2407 void | |
| 853 | 2408 signal_1 (void) |
| 2409 { | |
| 2410 } | |
| 2411 | |
| 428 | 2412 /* #### This function has not been synched with FSF. It diverges |
| 2413 significantly. */ | |
| 2414 | |
| 853 | 2415 /* The simplest external error function: it would be called |
| 2416 signal_continuable_error() in the terminology below, but it's | |
| 2417 Lisp-callable. */ | |
| 2418 | |
| 2419 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2420 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2421 An error symbol is a symbol defined using `define-error'. | |
| 2422 DATA should be a list. Its elements are printed as part of the error message. | |
| 2423 If the signal is handled, DATA is made available to the handler. | |
| 2424 See also the function `signal-error', and the functions to handle errors: | |
| 2425 `condition-case' and `call-with-condition-handler'. | |
| 2426 | |
| 2427 Note that this function can return, if the debugger is invoked and the | |
| 2428 user invokes the "return from signal" option. | |
| 2429 */ | |
| 2430 (error_symbol, data)) | |
| 428 | 2431 { |
| 2432 /* This function can GC */ | |
| 853 | 2433 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2434 Lisp_Object conditions = Qnil; | |
| 2435 Lisp_Object handlers = Qnil; | |
| 428 | 2436 /* signal_call_debugger() could get called more than once |
| 2437 (once when a call-with-condition-handler is about to | |
| 2438 be dealt with, and another when a condition-case handler | |
| 2439 is about to be invoked). So make sure the debugger and/or | |
| 2440 stack trace aren't done more than once. */ | |
| 2441 int stack_trace_displayed = 0; | |
| 2442 int debugger_entered = 0; | |
| 853 | 2443 |
| 2444 /* Fsignal() is one of these functions that's called all the time | |
| 2445 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2446 protect the objects because all sorts of weird stuff could | |
| 2447 happen. */ | |
| 2448 | |
| 2449 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2450 | |
| 2451 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2452 signal_1 (); | |
| 428 | 2453 |
| 2454 if (!initialized) | |
| 2455 { | |
| 2456 /* who knows how much has been initialized? Safest bet is | |
| 2457 just to bomb out immediately. */ | |
| 771 | 2458 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2459 ABORT (); |
| 428 | 2460 } |
| 2461 | |
| 3092 | 2462 #ifndef NEW_GC |
| 1123 | 2463 assert (!gc_in_progress); |
| 3092 | 2464 #endif /* not NEW_GC */ |
| 1123 | 2465 |
| 2466 /* We abort if in_display and we are not protected, as garbage | |
| 2467 collections and non-local exits will invariably be fatal, but in | |
| 2468 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2469 */ | |
| 2470 | |
| 1318 | 2471 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2472 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2473 #endif |
| 428 | 2474 |
| 853 | 2475 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2476 |
| 2477 for (handlers = Vcondition_handlers; | |
| 2478 CONSP (handlers); | |
| 2479 handlers = XCDR (handlers)) | |
| 2480 { | |
| 2481 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2482 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2483 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2484 | |
| 2485 if (!UNBOUNDP (handler_fun)) | |
| 2486 { | |
| 2487 /* call-with-condition-handler */ | |
| 2488 Lisp_Object tem; | |
| 2489 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2490 struct gcpro ngcpro1; | |
| 2491 NGCPRO1 (all_handlers); | |
| 2492 Vcondition_handlers = outer_handlers; | |
| 2493 | |
| 853 | 2494 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2495 outer_handlers, 1, |
| 2496 &stack_trace_displayed, | |
| 2497 &debugger_entered); | |
| 2498 if (!UNBOUNDP (tem)) | |
| 2499 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2500 | |
| 853 | 2501 if (OPAQUE_PTRP (handler_fun)) |
| 2502 { | |
| 2503 if (NILP (handler_data)) | |
| 2504 { | |
| 2505 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2506 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2507 (get_opaque_ptr (handler_fun)); | |
| 2508 | |
| 2509 tem = (*hfun) (error_symbol, data); | |
| 2510 } | |
| 2511 else | |
| 2512 { | |
| 2513 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2514 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2515 (get_opaque_ptr (handler_fun)); | |
| 2516 | |
| 2517 assert (NILP (XCDR (handler_data))); | |
| 2518 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2519 } | |
| 2520 } | |
| 2521 else | |
| 2522 { | |
| 2523 tem = Fcons (error_symbol, data); | |
| 2524 if (NILP (handler_data)) | |
| 2525 tem = call1 (handler_fun, tem); | |
| 2526 else | |
| 2527 { | |
| 2528 /* (This code won't be used (for now?).) */ | |
| 2529 struct gcpro nngcpro1; | |
| 2530 Lisp_Object args[3]; | |
| 2531 NNGCPRO1 (args[0]); | |
| 2532 nngcpro1.nvars = 3; | |
| 2533 args[0] = handler_fun; | |
| 2534 args[1] = tem; | |
| 2535 args[2] = handler_data; | |
| 2536 nngcpro1.var = args; | |
| 2537 tem = Fapply (3, args); | |
| 2538 NNUNGCPRO; | |
| 2539 } | |
| 2540 } | |
| 428 | 2541 NUNGCPRO; |
| 2542 #if 0 | |
| 2543 if (!EQ (tem, Qsignal)) | |
| 2544 return return_from_signal (tem); | |
| 2545 #endif | |
| 2546 /* If handler didn't throw, try another handler */ | |
| 2547 Vcondition_handlers = all_handlers; | |
| 2548 } | |
| 2549 | |
| 2550 /* It's a condition-case handler */ | |
| 2551 | |
| 2552 /* t is used by handlers for all conditions, set up by C code. | |
| 2553 * debugger is not called even if debug_on_error */ | |
| 2554 else if (EQ (handler_data, Qt)) | |
| 2555 { | |
| 2556 UNGCPRO; | |
|
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|
2557 throw_or_bomb_out (handlers, Fcons (error_symbol, data), |
|
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diff
changeset
|
2558 0, Qnil, Qnil); |
| 428 | 2559 } |
| 2560 /* `error' is used similarly to the way `t' is used, but in | |
| 2561 addition it invokes the debugger if debug_on_error. | |
| 2562 This is normally used for the outer command-loop error | |
| 2563 handler. */ | |
| 2564 else if (EQ (handler_data, Qerror)) | |
| 2565 { | |
| 853 | 2566 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2567 data, | |
| 428 | 2568 outer_handlers, 0, |
| 2569 &stack_trace_displayed, | |
| 2570 &debugger_entered); | |
| 2571 | |
| 2572 UNGCPRO; | |
| 2573 if (!UNBOUNDP (tem)) | |
| 2574 return return_from_signal (tem); | |
| 2575 | |
| 853 | 2576 tem = Fcons (error_symbol, data); |
|
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changeset
|
2577 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2578 } |
| 2579 else | |
| 2580 { | |
| 2581 /* handler established by real (Lisp) condition-case */ | |
| 2582 Lisp_Object h; | |
| 2583 | |
| 2584 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2585 { | |
| 2586 Lisp_Object clause = Fcar (h); | |
| 2587 Lisp_Object tem = Fcar (clause); | |
| 2588 | |
| 2589 if (condition_type_p (tem, conditions)) | |
| 2590 { | |
| 853 | 2591 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2592 outer_handlers, 1, |
| 2593 &stack_trace_displayed, | |
| 2594 &debugger_entered); | |
| 2595 UNGCPRO; | |
| 2596 if (!UNBOUNDP (tem)) | |
| 2597 return return_from_signal (tem); | |
| 2598 | |
| 2599 /* Doesn't return */ | |
| 853 | 2600 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause)); |
|
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diff
changeset
|
2601 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2602 } |
| 2603 } | |
| 2604 } | |
| 2605 } | |
| 2606 | |
| 2607 /* If no handler is present now, try to run the debugger, | |
| 2608 and if that fails, throw to top level. | |
| 2609 | |
| 2610 #### The only time that no handler is present is during | |
| 2611 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2612 there is no `top-level' catch. (That's why the |
| 428 | 2613 "bomb-out" hack was added.) |
| 2614 | |
| 853 | 2615 [[#### Fix this horrifitude!]] |
| 2616 | |
| 2617 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2618 | |
| 2619 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2620 &stack_trace_displayed, |
| 2621 &debugger_entered); | |
| 2622 UNGCPRO; | |
| 853 | 2623 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2624 data); /* Doesn't return */ | |
| 2268 | 2625 RETURN_NOT_REACHED (Qnil); |
| 428 | 2626 } |
| 2627 | |
| 2628 /****************** Error functions class 1 ******************/ | |
| 2629 | |
| 2630 /* Class 1: General functions that signal an error. | |
| 2631 These functions take an error type and a list of associated error | |
| 2632 data. */ | |
| 2633 | |
| 853 | 2634 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2635 |
| 2636 /* Signal a non-continuable error. */ | |
| 2637 | |
| 2638 DOESNT_RETURN | |
| 563 | 2639 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2640 { |
| 2641 for (;;) | |
| 2642 Fsignal (sig, data); | |
| 2643 } | |
| 853 | 2644 |
| 2645 #ifdef ERROR_CHECK_CATCH | |
| 2646 | |
| 2647 void | |
| 2648 check_catchlist_sanity (void) | |
| 2649 { | |
| 2650 #if 0 | |
| 2651 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2652 bug! */ | |
| 442 | 2653 struct catchtag *c; |
| 2654 int found_error_tag = 0; | |
| 2655 | |
| 2656 for (c = catchlist; c; c = c->next) | |
| 2657 { | |
| 2658 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2659 { | |
| 2660 found_error_tag = 1; | |
| 2661 break; | |
| 2662 } | |
| 2663 } | |
| 2664 | |
| 2665 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2666 #endif /* vou me tomar no cul */ |
| 2667 } | |
| 2668 | |
| 2669 void | |
| 2670 check_specbind_stack_sanity (void) | |
| 2671 { | |
| 2672 } | |
| 2673 | |
| 2674 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2675 |
| 2676 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2677 according to ERRB. CLASS is the class of warning and should | |
| 2678 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2679 Qresource, etc.). */ | |
| 2680 | |
| 2681 void | |
| 1204 | 2682 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2683 Error_Behavior errb) |
| 428 | 2684 { |
| 2685 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2686 return; | |
| 793 | 2687 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2688 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2689 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2690 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2691 else |
|
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|
2692 signal_error_1 (sig, data); |
| 428 | 2693 } |
| 2694 | |
| 2695 /* Signal a continuable error or display a warning or do nothing, | |
| 2696 according to ERRB. */ | |
| 2697 | |
| 2698 Lisp_Object | |
| 563 | 2699 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2700 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2701 { |
| 2702 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2703 return Qnil; | |
| 793 | 2704 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2705 { | |
| 1204 | 2706 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2707 return Qnil; |
| 2708 } | |
| 428 | 2709 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2710 { | |
| 1204 | 2711 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2712 return Qnil; |
| 2713 } | |
| 2714 else | |
| 2715 return Fsignal (sig, data); | |
| 2716 } | |
| 2717 | |
| 2718 | |
| 2719 /****************** Error functions class 2 ******************/ | |
| 2720 | |
| 563 | 2721 /* Class 2: Signal an error with a string and an associated object. |
| 2722 Normally these functions are used to attach one associated object, | |
| 2723 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2724 than one object, make a list of the objects with Qunbound as the | |
| 2725 first element. (If you have specifically two objects to attach, | |
| 2726 consider using the function in class 3 below.) These functions | |
| 2727 signal an error of a specified type, whose data is one or more | |
| 2728 objects (usually two), a string the related Lisp object(s) | |
| 2729 specified as FROB. */ | |
| 2730 | |
| 2731 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2732 to signal_error_1(). */ | |
| 2733 | |
| 2734 Lisp_Object | |
|
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diff
changeset
|
2735 build_error_data (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2736 { |
| 2737 if (EQ (frob, Qunbound)) | |
| 2738 frob = Qnil; | |
| 2739 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2740 frob = XCDR (frob); | |
| 2741 else | |
| 2742 frob = list1 (frob); | |
| 2743 if (!reason) | |
| 2744 return frob; | |
| 2745 else | |
| 771 | 2746 return Fcons (build_msg_string (reason), frob); |
| 563 | 2747 } |
| 2748 | |
| 2749 DOESNT_RETURN | |
|
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diff
changeset
|
2750 signal_error (Lisp_Object type, const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2751 { |
| 2752 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2753 } | |
| 2754 | |
|
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|
2755 /* NOTE NOTE NOTE: If you feel you need signal_ierror() or something |
|
4aebb0131297
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diff
changeset
|
2756 similar when reason is a non-ASCII message, you're probably doing |
|
4aebb0131297
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changeset
|
2757 something wrong. When you have an error message from an external |
|
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
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changeset
|
2758 source, you should put the error message as the first item in FROB and |
|
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
Ben Wing <ben@xemacs.org>
parents:
4969
diff
changeset
|
2759 put a string in REASON indicating what you were doing when the error |
|
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
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diff
changeset
|
2760 message occurred. Use signal_error_2() for such a case. */ |
|
4aebb0131297
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diff
changeset
|
2761 |
| 563 | 2762 void |
|
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Mule-izing, various fixes related to char * arguments
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diff
changeset
|
2763 maybe_signal_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2764 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2765 Error_Behavior errb) |
| 563 | 2766 { |
| 2767 /* Optimization: */ | |
| 2768 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2769 return; | |
| 1204 | 2770 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2771 } |
| 2772 | |
| 2773 Lisp_Object | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
2774 signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2775 Lisp_Object frob) |
| 2776 { | |
| 2777 return Fsignal (type, build_error_data (reason, frob)); | |
| 2778 } | |
| 2779 | |
| 2780 Lisp_Object | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
2781 maybe_signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2782 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2783 Error_Behavior errb) |
| 563 | 2784 { |
| 2785 /* Optimization: */ | |
| 2786 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2787 return Qnil; | |
| 2788 return maybe_signal_continuable_error_1 (type, | |
| 2789 build_error_data (reason, frob), | |
| 1204 | 2790 class_, errb); |
| 563 | 2791 } |
| 2792 | |
| 2793 | |
| 2794 /****************** Error functions class 3 ******************/ | |
| 2795 | |
| 2796 /* Class 3: Signal an error with a string and two associated objects. | |
| 2797 These functions signal an error of a specified type, whose data | |
| 2798 is three objects, a string and two related Lisp objects. | |
| 2799 (The equivalent could be accomplished using the class 2 functions, | |
| 2800 but these are more convenient in this particular case.) */ | |
| 2801 | |
| 2802 DOESNT_RETURN | |
|
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|
2803 signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2804 Lisp_Object frob0, Lisp_Object frob1) |
| 2805 { | |
| 771 | 2806 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2807 frob1)); |
| 2808 } | |
| 2809 | |
| 2810 void | |
|
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Mule-izing, various fixes related to char * arguments
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diff
changeset
|
2811 maybe_signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2812 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2813 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2814 { |
| 2815 /* Optimization: */ | |
| 2816 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2817 return; | |
| 771 | 2818 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2819 frob1), class_, errb); |
| 563 | 2820 } |
| 2821 | |
| 2822 Lisp_Object | |
|
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changeset
|
2823 signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2824 Lisp_Object frob0, Lisp_Object frob1) |
| 2825 { | |
| 771 | 2826 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2827 frob1)); |
| 2828 } | |
| 2829 | |
| 2830 Lisp_Object | |
|
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diff
changeset
|
2831 maybe_signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2832 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2833 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2834 { |
| 2835 /* Optimization: */ | |
| 2836 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2837 return Qnil; | |
| 2838 return maybe_signal_continuable_error_1 | |
| 771 | 2839 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2840 class_, errb); |
| 563 | 2841 } |
| 2842 | |
| 2843 | |
| 2844 /****************** Error functions class 4 ******************/ | |
| 2845 | |
| 2846 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2847 These functions signal an error of a specified type, whose data |
| 428 | 2848 is a single string, created using the arguments. */ |
| 2849 | |
| 2850 DOESNT_RETURN | |
|
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|
2851 signal_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 442 | 2852 { |
| 2853 Lisp_Object obj; | |
| 2854 va_list args; | |
| 2855 | |
| 2856 va_start (args, fmt); | |
|
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|
2857 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2858 va_end (args); |
| 2859 | |
| 2860 /* Fsignal GC-protects its args */ | |
| 563 | 2861 signal_error (type, 0, obj); |
| 442 | 2862 } |
| 2863 | |
| 2864 void | |
| 1204 | 2865 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
|
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|
2866 const Ascbyte *fmt, ...) |
| 442 | 2867 { |
| 2868 Lisp_Object obj; | |
| 2869 va_list args; | |
| 2870 | |
| 2871 /* Optimization: */ | |
| 2872 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2873 return; | |
| 2874 | |
| 2875 va_start (args, fmt); | |
|
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|
2876 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2877 va_end (args); |
| 2878 | |
| 2879 /* Fsignal GC-protects its args */ | |
| 1204 | 2880 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2881 } |
| 2882 | |
| 2883 Lisp_Object | |
|
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|
2884 signal_continuable_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 428 | 2885 { |
| 2886 Lisp_Object obj; | |
| 2887 va_list args; | |
| 2888 | |
| 2889 va_start (args, fmt); | |
|
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|
2890 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2891 va_end (args); |
| 2892 | |
| 2893 /* Fsignal GC-protects its args */ | |
| 2894 return Fsignal (type, list1 (obj)); | |
| 2895 } | |
| 2896 | |
| 2897 Lisp_Object | |
| 1204 | 2898 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
|
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|
2899 Error_Behavior errb, const Ascbyte *fmt, ...) |
| 442 | 2900 { |
| 2901 Lisp_Object obj; | |
| 2902 va_list args; | |
| 2903 | |
| 2904 /* Optimization: */ | |
| 2905 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2906 return Qnil; | |
| 2907 | |
| 2908 va_start (args, fmt); | |
|
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Ben Wing <ben@xemacs.org>
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diff
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|
2909 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2910 va_end (args); |
| 2911 | |
| 2912 /* Fsignal GC-protects its args */ | |
| 1204 | 2913 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2914 } |
| 2915 | |
| 2916 | |
| 2917 /****************** Error functions class 5 ******************/ | |
| 2918 | |
| 563 | 2919 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2920 These functions signal an error of a specified type, whose data |
| 563 | 2921 is a one or more objects, a string (created using the arguments) |
| 2922 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2923 is the same as for class 2.) | |
| 2924 | |
| 2925 There is no need for a class 6 because you can always attach 2 | |
| 2926 objects using class 5 (for FROB, specify a list with three | |
| 2927 elements, the first of which is Qunbound), and these functions are | |
| 2928 not commonly used. | |
| 2929 */ | |
| 442 | 2930 |
| 2931 DOESNT_RETURN | |
|
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
2932 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const Ascbyte *fmt, |
| 563 | 2933 ...) |
| 442 | 2934 { |
| 2935 Lisp_Object obj; | |
| 2936 va_list args; | |
| 2937 | |
| 2938 va_start (args, fmt); | |
|
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|
2939 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2940 va_end (args); |
| 2941 | |
| 2942 /* Fsignal GC-protects its args */ | |
| 563 | 2943 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2944 } |
| 2945 | |
| 2946 void | |
| 563 | 2947 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2948 Lisp_Object class_, Error_Behavior errb, |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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|
2949 const Ascbyte *fmt, ...) |
| 442 | 2950 { |
| 2951 Lisp_Object obj; | |
| 2952 va_list args; | |
| 2953 | |
| 2954 /* Optimization: */ | |
| 2955 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2956 return; | |
| 2957 | |
| 2958 va_start (args, fmt); | |
|
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|
2959 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2960 va_end (args); |
| 2961 | |
| 2962 /* Fsignal GC-protects its args */ | |
| 1204 | 2963 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2964 errb); |
| 428 | 2965 } |
| 2966 | |
| 2967 Lisp_Object | |
| 563 | 2968 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
|
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|
2969 const Ascbyte *fmt, ...) |
| 428 | 2970 { |
| 2971 Lisp_Object obj; | |
| 2972 va_list args; | |
| 2973 | |
| 2974 va_start (args, fmt); | |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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|
2975 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2976 va_end (args); |
| 2977 | |
| 2978 /* Fsignal GC-protects its args */ | |
| 563 | 2979 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2980 } |
| 2981 | |
| 2982 Lisp_Object | |
| 563 | 2983 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2984 Lisp_Object class_, |
| 578 | 2985 Error_Behavior errb, |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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changeset
|
2986 const Ascbyte *fmt, ...) |
| 428 | 2987 { |
| 2988 Lisp_Object obj; | |
| 2989 va_list args; | |
| 2990 | |
| 2991 /* Optimization: */ | |
| 2992 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2993 return Qnil; | |
| 2994 | |
| 2995 va_start (args, fmt); | |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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|
2996 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2997 va_end (args); |
| 2998 | |
| 2999 /* Fsignal GC-protects its args */ | |
| 563 | 3000 return maybe_signal_continuable_error_1 (type, |
| 3001 Fcons (obj, | |
| 3002 build_error_data (0, frob)), | |
| 1204 | 3003 class_, errb); |
| 428 | 3004 } |
| 3005 | |
| 3006 | |
| 3007 /* This is what the QUIT macro calls to signal a quit */ | |
| 3008 void | |
| 3009 signal_quit (void) | |
| 3010 { | |
| 853 | 3011 /* This function cannot GC. GC is prohibited because most callers do |
| 3012 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 3013 --ben */ | |
| 3014 | |
| 3015 int count; | |
| 3016 | |
| 428 | 3017 if (EQ (Vquit_flag, Qcritical)) |
| 3018 debug_on_quit |= 2; /* set critical bit. */ | |
| 3019 Vquit_flag = Qnil; | |
| 853 | 3020 count = begin_gc_forbidden (); |
| 428 | 3021 /* note that this is continuable. */ |
| 3022 Fsignal (Qquit, Qnil); | |
| 853 | 3023 unbind_to (count); |
| 428 | 3024 } |
| 3025 | |
| 3026 | |
| 563 | 3027 /************************ convenience error functions ***********************/ |
| 3028 | |
| 436 | 3029 Lisp_Object |
| 428 | 3030 signal_void_function_error (Lisp_Object function) |
| 3031 { | |
| 436 | 3032 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 3033 } |
| 3034 | |
| 436 | 3035 Lisp_Object |
| 428 | 3036 signal_invalid_function_error (Lisp_Object function) |
| 3037 { | |
| 436 | 3038 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 3039 } |
| 3040 | |
| 436 | 3041 Lisp_Object |
| 428 | 3042 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 3043 { | |
| 436 | 3044 return Fsignal (Qwrong_number_of_arguments, |
| 3045 list2 (function, make_int (nargs))); | |
| 428 | 3046 } |
| 3047 | |
| 3048 /* Used in list traversal macros for efficiency. */ | |
| 436 | 3049 DOESNT_RETURN |
| 428 | 3050 signal_malformed_list_error (Lisp_Object list) |
| 3051 { | |
| 563 | 3052 signal_error (Qmalformed_list, 0, list); |
| 428 | 3053 } |
| 3054 | |
| 436 | 3055 DOESNT_RETURN |
| 428 | 3056 signal_malformed_property_list_error (Lisp_Object list) |
| 3057 { | |
| 563 | 3058 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 3059 } |
| 3060 | |
| 436 | 3061 DOESNT_RETURN |
| 428 | 3062 signal_circular_list_error (Lisp_Object list) |
| 3063 { | |
| 563 | 3064 signal_error (Qcircular_list, 0, list); |
| 428 | 3065 } |
| 3066 | |
| 436 | 3067 DOESNT_RETURN |
| 428 | 3068 signal_circular_property_list_error (Lisp_Object list) |
| 3069 { | |
| 563 | 3070 signal_error (Qcircular_property_list, 0, list); |
| 428 | 3071 } |
| 442 | 3072 |
| 2267 | 3073 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 3074 DOESNT_RETURN |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
3075 syntax_error (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3076 { |
| 563 | 3077 signal_error (Qsyntax_error, reason, frob); |
| 442 | 3078 } |
| 3079 | |
| 3080 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3081 syntax_error_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3082 { |
| 563 | 3083 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 3084 } | |
| 3085 | |
| 3086 void | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3087 maybe_syntax_error (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3088 Lisp_Object class_, Error_Behavior errb) |
| 3089 { | |
| 3090 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 3091 } |
| 3092 | |
| 3093 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3094 sferror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3095 { |
| 3096 signal_error (Qstructure_formation_error, reason, frob); | |
| 3097 } | |
| 3098 | |
| 3099 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3100 sferror_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3101 { |
| 3102 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 3103 } | |
| 3104 | |
| 3105 void | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3106 maybe_sferror (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3107 Lisp_Object class_, Error_Behavior errb) |
| 3108 { | |
| 3109 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 3110 } |
| 3111 | |
| 3112 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3113 invalid_argument (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3114 { |
| 563 | 3115 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 3116 } |
| 3117 | |
| 3118 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
|
3119 invalid_argument_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3120 Lisp_Object frob2) |
| 442 | 3121 { |
| 563 | 3122 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 3123 } | |
| 3124 | |
| 3125 void | |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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changeset
|
3126 maybe_invalid_argument (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3127 Lisp_Object class_, Error_Behavior errb) |
| 3128 { | |
| 3129 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 3130 } |
| 3131 | |
| 3132 DOESNT_RETURN | |
|
5084
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
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5050
diff
changeset
|
3133 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>
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5050
diff
changeset
|
3134 { |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
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5050
diff
changeset
|
3135 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>
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5050
diff
changeset
|
3136 } |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3137 |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
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5050
diff
changeset
|
3138 DOESNT_RETURN |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3139 invalid_constant (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3140 { |
| 3141 signal_error (Qinvalid_constant, reason, frob); | |
| 3142 } | |
| 3143 | |
| 3144 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3145 invalid_constant_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3146 Lisp_Object frob2) |
| 563 | 3147 { |
| 3148 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 3149 } | |
| 3150 | |
| 3151 void | |
|
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Ben Wing <ben@xemacs.org>
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|
3152 maybe_invalid_constant (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3153 Lisp_Object class_, Error_Behavior errb) |
| 3154 { | |
| 3155 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3156 } |
| 3157 | |
| 3158 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3159 invalid_operation (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3160 { |
| 563 | 3161 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3162 } |
| 3163 | |
| 3164 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3165 invalid_operation_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3166 Lisp_Object frob2) |
| 442 | 3167 { |
| 563 | 3168 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3169 } | |
| 3170 | |
| 3171 void | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3172 maybe_invalid_operation (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3173 Lisp_Object class_, Error_Behavior errb) |
| 3174 { | |
| 3175 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3176 } |
| 3177 | |
| 3178 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3179 invalid_change (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3180 { |
| 563 | 3181 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3182 } |
| 3183 | |
| 3184 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3185 invalid_change_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3186 { |
| 563 | 3187 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3188 } | |
| 3189 | |
| 3190 void | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3191 maybe_invalid_change (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3192 Lisp_Object class_, Error_Behavior errb) |
| 3193 { | |
| 3194 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3195 } |
| 3196 | |
| 3197 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3198 invalid_state (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3199 { |
| 3200 signal_error (Qinvalid_state, reason, frob); | |
| 3201 } | |
| 3202 | |
| 3203 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3204 invalid_state_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3205 { |
| 3206 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3207 } | |
| 3208 | |
| 3209 void | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3210 maybe_invalid_state (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3211 Lisp_Object class_, Error_Behavior errb) |
| 3212 { | |
| 3213 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3214 } |
| 3215 | |
| 3216 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3217 wtaerror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3218 { |
| 3219 signal_error (Qwrong_type_argument, reason, frob); | |
| 3220 } | |
| 3221 | |
| 3222 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3223 stack_overflow (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3224 { |
| 3225 signal_error (Qstack_overflow, reason, frob); | |
| 3226 } | |
| 3227 | |
| 3228 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
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changeset
|
3229 out_of_memory (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3230 { |
| 3231 signal_error (Qout_of_memory, reason, frob); | |
| 3232 } | |
| 3233 | |
| 428 | 3234 |
| 3235 /************************************************************************/ | |
| 3236 /* User commands */ | |
| 3237 /************************************************************************/ | |
| 3238 | |
| 3239 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3240 Return t if FUNCTION makes provisions for interactive calling. | |
| 3241 This means it contains a description for how to read arguments to give it. | |
| 3242 The value is nil for an invalid function or a symbol with no function | |
| 3243 definition. | |
| 3244 | |
| 3245 Interactively callable functions include | |
| 3246 | |
| 3247 -- strings and vectors (treated as keyboard macros) | |
| 3248 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3249 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3250 (i.e. the interactive flag) | |
| 3251 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3252 value | |
| 3253 -- subrs (built-in functions) that are interactively callable | |
| 3254 | |
| 3255 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3256 */ | |
| 3257 (function)) | |
| 3258 { | |
| 3259 Lisp_Object fun = indirect_function (function, 0); | |
| 3260 | |
| 3261 if (COMPILED_FUNCTIONP (fun)) | |
| 3262 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3263 | |
| 3264 /* Lists may represent commands. */ | |
| 3265 if (CONSP (fun)) | |
| 3266 { | |
| 3267 Lisp_Object funcar = XCAR (fun); | |
| 3268 if (EQ (funcar, Qlambda)) | |
| 3269 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3270 if (EQ (funcar, Qautoload)) | |
| 3271 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3272 else | |
| 3273 return Qnil; | |
| 3274 } | |
| 3275 | |
| 3276 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3277 interactive spec. */ | |
| 3278 if (SUBRP (fun)) | |
| 3279 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3280 | |
| 3281 /* Strings and vectors are keyboard macros. */ | |
| 3282 if (VECTORP (fun) || STRINGP (fun)) | |
| 3283 return Qt; | |
| 3284 | |
| 3285 /* Everything else (including Qunbound) is not a command. */ | |
| 3286 return Qnil; | |
| 3287 } | |
| 3288 | |
| 3289 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3290 Execute CMD as an editor command. | |
| 3291 CMD must be an object that satisfies the `commandp' predicate. | |
| 3292 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3293 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3294 when reading the arguments. | |
| 3295 */ | |
| 444 | 3296 (cmd, record_flag, keys)) |
| 428 | 3297 { |
| 3298 /* This function can GC */ | |
| 3299 Lisp_Object prefixarg; | |
| 3300 Lisp_Object final = cmd; | |
| 4162 | 3301 PROFILE_DECLARE(); |
| 428 | 3302 struct console *con = XCONSOLE (Vselected_console); |
| 3303 | |
| 3304 prefixarg = con->prefix_arg; | |
| 3305 con->prefix_arg = Qnil; | |
| 3306 Vcurrent_prefix_arg = prefixarg; | |
| 3307 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3308 | |
| 3309 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3310 return run_hook (Qdisabled_command_hook); |
| 428 | 3311 |
| 3312 for (;;) | |
| 3313 { | |
| 3314 final = indirect_function (cmd, 1); | |
| 3315 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3316 { |
| 3317 /* do_autoload GCPROs both arguments */ | |
| 3318 do_autoload (final, cmd); | |
| 3319 } | |
| 428 | 3320 else |
| 3321 break; | |
| 3322 } | |
| 3323 | |
| 3324 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3325 { | |
| 3326 backtrace.function = &Qcall_interactively; | |
| 3327 backtrace.args = &cmd; | |
| 3328 backtrace.nargs = 1; | |
| 3329 backtrace.evalargs = 0; | |
| 1292 | 3330 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3331 backtrace.debug_on_exit = 0; |
| 1292 | 3332 backtrace.function_being_called = 0; |
| 428 | 3333 PUSH_BACKTRACE (backtrace); |
| 3334 | |
| 1292 | 3335 PROFILE_ENTER_FUNCTION (); |
| 444 | 3336 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3337 PROFILE_EXIT_FUNCTION (); |
| 428 | 3338 |
| 3339 POP_BACKTRACE (backtrace); | |
| 3340 return final; | |
| 3341 } | |
| 3342 else if (STRINGP (final) || VECTORP (final)) | |
| 3343 { | |
| 3344 return Fexecute_kbd_macro (final, prefixarg); | |
| 3345 } | |
| 3346 else | |
| 3347 { | |
| 3348 Fsignal (Qwrong_type_argument, | |
| 3349 Fcons (Qcommandp, | |
| 3350 (EQ (cmd, final) | |
| 3351 ? list1 (cmd) | |
| 3352 : list2 (cmd, final)))); | |
| 3353 return Qnil; | |
| 3354 } | |
| 3355 } | |
| 3356 | |
| 3357 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3358 Return t if function in which this appears was called interactively. | |
| 3359 This means that the function was called with call-interactively (which | |
| 3360 includes being called as the binding of a key) | |
| 3361 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3362 */ | |
| 3363 ()) | |
| 3364 { | |
| 3365 REGISTER struct backtrace *btp; | |
| 3366 REGISTER Lisp_Object fun; | |
| 3367 | |
| 3368 if (!INTERACTIVE) | |
| 3369 return Qnil; | |
| 3370 | |
| 3371 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3372 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3373 function). Note that *btp->function may be a symbol pointing at a | |
| 3374 compiled function. */ | |
| 3375 btp = backtrace_list; | |
| 3376 | |
| 3377 #if 0 /* FSFmacs */ | |
| 3378 | |
| 3379 /* #### FSFmacs does the following instead. I can't figure | |
| 3380 out which one is more correct. */ | |
| 3381 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3382 the top for Finteractive_p itself. If so, skip it. */ | |
| 3383 fun = Findirect_function (*btp->function); | |
| 3384 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3385 btp = btp->next; | |
| 3386 | |
| 3387 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3388 may be a frame for Fbyte_code. Now, given the strictest | |
| 3389 definition, this function isn't really being called | |
| 3390 interactively, but because that's the way Emacs 18 always builds | |
| 3391 byte-compiled functions, we'll accept it for now. */ | |
| 3392 if (EQ (*btp->function, Qbyte_code)) | |
| 3393 btp = btp->next; | |
| 3394 | |
| 3395 /* 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
|
3396 looking at several frames for special operators. Skip past them. */ |
| 428 | 3397 while (btp && |
| 3398 btp->nargs == UNEVALLED) | |
| 3399 btp = btp->next; | |
| 3400 | |
| 3401 #else | |
| 3402 | |
| 3403 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3404 btp = btp->next; | |
| 3405 for (; | |
| 3406 btp && (btp->nargs == UNEVALLED | |
| 3407 || EQ (*btp->function, Qbyte_code)); | |
| 3408 btp = btp->next) | |
| 3409 {} | |
| 3410 /* btp now points at the frame of the innermost function | |
| 3411 that DOES eval its args. | |
| 3412 If it is a built-in function (such as load or eval-region) | |
| 3413 return nil. */ | |
| 3414 /* Beats me why this is necessary, but it is */ | |
| 3415 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3416 return Qt; | |
| 3417 | |
| 3418 #endif | |
| 3419 | |
| 3420 fun = Findirect_function (*btp->function); | |
| 3421 if (SUBRP (fun)) | |
| 3422 return Qnil; | |
| 3423 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3424 Return t if that function was called interactively. */ | |
| 3425 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3426 return Qt; | |
| 3427 return Qnil; | |
| 3428 } | |
| 3429 | |
| 3430 | |
| 3431 /************************************************************************/ | |
| 3432 /* Autoloading */ | |
| 3433 /************************************************************************/ | |
| 3434 | |
| 3435 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3436 Define FUNCTION to autoload from FILENAME. |
| 3437 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3438 The remaining optional arguments provide additional info about the | |
| 3439 real definition. | |
| 3440 DOCSTRING is documentation for FUNCTION. | |
| 3441 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3442 TYPE indicates the type of the object: | |
| 428 | 3443 nil or omitted says FUNCTION is a function, |
| 3444 `keymap' says FUNCTION is really a keymap, and | |
| 3445 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3446 If FUNCTION already has a non-void function definition that is not an |
| 3447 autoload object, this function does nothing and returns nil. | |
| 428 | 3448 */ |
| 444 | 3449 (function, filename, docstring, interactive, type)) |
| 428 | 3450 { |
| 3451 /* This function can GC */ | |
| 3452 CHECK_SYMBOL (function); | |
| 444 | 3453 CHECK_STRING (filename); |
| 428 | 3454 |
| 3455 /* If function is defined and not as an autoload, don't override */ | |
| 3456 { | |
| 3457 Lisp_Object f = XSYMBOL (function)->function; | |
| 3458 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3459 return Qnil; | |
| 3460 } | |
| 3461 | |
| 3462 if (purify_flag) | |
| 3463 { | |
| 3464 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3465 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3466 } |
| 440 | 3467 |
| 444 | 3468 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3469 docstring, |
| 3470 interactive, | |
| 3471 type))); | |
| 3472 } | |
| 3473 | |
| 3474 Lisp_Object | |
| 3475 un_autoload (Lisp_Object oldqueue) | |
| 3476 { | |
| 3477 /* This function can GC */ | |
| 3478 REGISTER Lisp_Object queue, first, second; | |
| 3479 | |
| 3480 /* Queue to unwind is current value of Vautoload_queue. | |
| 3481 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3482 queue = Vautoload_queue; | |
| 3483 Vautoload_queue = oldqueue; | |
| 3484 while (CONSP (queue)) | |
| 3485 { | |
| 3486 first = XCAR (queue); | |
| 3487 second = Fcdr (first); | |
| 3488 first = Fcar (first); | |
| 3489 if (NILP (second)) | |
| 3490 Vfeatures = first; | |
| 3491 else | |
| 3492 Ffset (first, second); | |
| 3493 queue = Fcdr (queue); | |
| 3494 } | |
| 3495 return Qnil; | |
| 3496 } | |
| 3497 | |
| 970 | 3498 /* do_autoload GCPROs both arguments */ |
| 428 | 3499 void |
| 3500 do_autoload (Lisp_Object fundef, | |
| 3501 Lisp_Object funname) | |
| 3502 { | |
| 3503 /* This function can GC */ | |
| 3504 int speccount = specpdl_depth(); | |
| 3505 Lisp_Object fun = funname; | |
| 970 | 3506 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3507 |
| 3508 CHECK_SYMBOL (funname); | |
| 970 | 3509 GCPRO3 (fundef, funname, fun); |
| 428 | 3510 |
| 3511 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3512 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3513 Vautoload_queue = Qt; | |
| 3514 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3515 | |
| 3516 { | |
| 3517 Lisp_Object queue; | |
| 3518 | |
| 3519 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3520 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3521 { | |
| 3522 Lisp_Object first = XCAR (queue); | |
| 3523 Lisp_Object second = Fcdr (first); | |
| 3524 | |
| 3525 first = Fcar (first); | |
| 3526 | |
| 3527 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3528 may be an atom if the autoload entry was generated by a defalias | |
| 3529 or fset. */ | |
| 3530 if (CONSP (second)) | |
| 3531 Fput (first, Qautoload, (XCDR (second))); | |
| 3532 } | |
| 3533 } | |
| 3534 | |
| 3535 /* Once loading finishes, don't undo it. */ | |
| 3536 Vautoload_queue = Qt; | |
| 771 | 3537 unbind_to (speccount); |
| 428 | 3538 |
| 3539 fun = indirect_function (fun, 0); | |
| 3540 | |
| 3541 #if 0 /* FSFmacs */ | |
| 3542 if (!NILP (Fequal (fun, fundef))) | |
| 3543 #else | |
| 3544 if (UNBOUNDP (fun) | |
| 3545 || (CONSP (fun) | |
| 3546 && EQ (XCAR (fun), Qautoload))) | |
| 3547 #endif | |
| 563 | 3548 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3549 UNGCPRO; |
| 3550 } | |
| 3551 | |
| 3552 | |
| 3553 /************************************************************************/ | |
| 3554 /* eval, funcall, apply */ | |
| 3555 /************************************************************************/ | |
| 3556 | |
| 814 | 3557 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3558 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3559 -- in particular, the calling of subrs and compiled functions, the most | |
| 3560 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3561 to do to squeeze more speed out except by switching to lexical | |
| 3562 variables, which would eliminate the specbind loop. (But the real gain | |
| 3563 from lexical variables would come from better optimization -- with | |
| 3564 dynamic binding, you have the constant problem that any function call | |
| 3565 that you haven't explicitly proven to be side-effect-free might | |
| 3566 potentially side effect your local variables, which makes optimization | |
| 3567 extremely difficult when there are function calls anywhere in a chunk of | |
| 3568 code to be optimized. Even worse, you don't know that *your* local | |
| 3569 variables aren't side-effecting an outer function's local variables, so | |
| 3570 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3571 | |
| 428 | 3572 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3573 int nargs, Lisp_Object args[]); |
| 428 | 3574 static int in_warnings; |
| 3575 | |
| 3576 | |
| 814 | 3577 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3578 int nargs, | |
| 3579 Lisp_Object args[]); | |
| 3580 | |
| 3581 /* The theory behind making this a separate function is to shrink | |
| 3582 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3583 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3584 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3585 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3586 | |
| 3587 void | |
| 3588 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3589 Lisp_Object args[]) | |
| 3590 { | |
| 3591 REGISTER int i = 0; | |
| 3592 int max_non_rest_args = f->args_in_array - 1; | |
| 3593 int bindargs = min (nargs, max_non_rest_args); | |
| 3594 | |
| 3595 for (i = 0; i < bindargs; i++) | |
| 3092 | 3596 #ifdef NEW_GC |
| 3597 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3598 args[i]); | |
| 3599 #else /* not NEW_GC */ | |
| 814 | 3600 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3601 #endif /* not NEW_GC */ |
| 814 | 3602 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3603 #ifdef NEW_GC |
| 3604 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3605 Qnil); | |
| 3606 #else /* not NEW_GC */ | |
| 814 | 3607 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3608 #endif /* not NEW_GC */ |
| 3609 #ifdef NEW_GC | |
| 3610 SPECBIND_FAST_UNSAFE | |
| 3611 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3612 nargs > max_non_rest_args ? | |
| 3613 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3614 Qnil); | |
| 3615 #else /* not NEW_GC */ | |
| 814 | 3616 SPECBIND_FAST_UNSAFE |
| 3617 (f->args[max_non_rest_args], | |
| 3618 nargs > max_non_rest_args ? | |
| 3619 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3620 Qnil); | |
| 3092 | 3621 #endif /* not NEW_GC */ |
| 814 | 3622 } |
| 3623 | |
| 3624 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3625 in ARGS, and return the result of evaluation. */ | |
| 3626 inline static Lisp_Object | |
| 3627 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3628 { | |
| 3629 /* This function can GC */ | |
| 3630 int speccount = specpdl_depth(); | |
| 3631 REGISTER int i = 0; | |
| 3632 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3633 | |
| 3634 if (!OPAQUEP (f->instructions)) | |
| 3635 /* Lazily munge the instructions into a more efficient form */ | |
| 3636 optimize_compiled_function (fun); | |
| 3637 | |
| 3638 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3639 the required space on the specbinding stack for binding the args | |
| 3640 and local variables of fun. So just reserve it once. */ | |
| 3641 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3642 | |
| 3643 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3644 optional arguments. */ | |
| 3645 { | |
| 3646 #if 1 | |
| 3647 for (i = 0; i < nargs; i++) | |
| 3092 | 3648 #ifdef NEW_GC |
| 3649 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3650 args[i]); | |
| 3651 #else /* not NEW_GC */ | |
| 814 | 3652 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3653 #endif /* not NEW_GC */ |
| 814 | 3654 #else |
| 3655 /* Here's an alternate way to write the loop that tries to further | |
| 3656 optimize funcalls for functions with few arguments by partially | |
| 3657 unrolling the loop. It's not clear whether this is a win since it | |
| 3658 increases the size of the function and the possibility of L1 cache | |
| 3659 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3660 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3661 compiler repeatedly and looking at the total time, show very | |
| 3662 little difference between the simple loop above, the unrolled code | |
| 3663 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3664 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3665 because it's smaller. */ | |
| 3666 switch (nargs) | |
| 3667 { | |
| 3668 default: | |
| 3669 for (i = nargs - 1; i >= 4; i--) | |
| 3670 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3671 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3672 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3673 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3674 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3675 case 0: break; | |
| 3676 } | |
| 3677 #endif | |
| 3678 } | |
| 3679 else if (nargs < f->min_args) | |
| 3680 goto wrong_number_of_arguments; | |
| 3681 else if (nargs < f->max_args) | |
| 3682 { | |
| 3683 for (i = 0; i < nargs; i++) | |
| 3092 | 3684 #ifdef NEW_GC |
| 3685 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3686 args[i]); | |
| 3687 #else /* not NEW_GC */ | |
| 814 | 3688 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3689 #endif /* not NEW_GC */ |
| 814 | 3690 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3691 #ifdef NEW_GC |
| 3692 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3693 Qnil); | |
| 3694 #else /* not NEW_GC */ | |
| 814 | 3695 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3696 #endif /* not NEW_GC */ |
| 814 | 3697 } |
| 3698 else if (f->max_args == MANY) | |
| 3699 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3700 else | |
| 3701 { | |
| 3702 wrong_number_of_arguments: | |
| 3703 /* The actual printed compiled_function object is incomprehensible. | |
| 3704 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3705 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3706 fun = *backtrace_list->function; | |
| 3707 return Fsignal (Qwrong_number_of_arguments, | |
| 3708 list2 (fun, make_int (nargs))); | |
| 3709 } | |
| 3710 | |
| 3711 { | |
| 3712 Lisp_Object value = | |
| 3713 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
|
3714 #ifdef ERROR_CHECK_BYTE_CODE |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3715 XOPAQUE_SIZE (f->instructions) / |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3716 sizeof (Opbyte), |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3717 #endif |
| 814 | 3718 f->stack_depth, |
| 3719 XVECTOR_DATA (f->constants)); | |
| 3720 | |
| 3721 /* The attempt to optimize this by only unbinding variables failed | |
| 3722 because using buffer-local variables as function parameters | |
| 3723 leads to specpdl_ptr->func != 0 */ | |
| 3724 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3725 UNBIND_TO_GCPRO (speccount, value); | |
| 3726 return value; | |
| 3727 } | |
| 3728 } | |
| 3729 | |
| 428 | 3730 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3731 Evaluate FORM and return its value. | |
| 3732 */ | |
| 3733 (form)) | |
| 3734 { | |
| 3735 /* This function can GC */ | |
| 3736 Lisp_Object fun, val, original_fun, original_args; | |
| 3737 int nargs; | |
| 4162 | 3738 PROFILE_DECLARE(); |
| 428 | 3739 |
| 1318 | 3740 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3741 check_proper_critical_section_lisp_protection (); | |
| 3742 #endif | |
| 3743 | |
| 3989 | 3744 if (!CONSP (form)) |
| 3745 { | |
| 3746 if (SYMBOLP (form)) | |
| 3747 { | |
| 3748 return Fsymbol_value (form); | |
| 3749 } | |
| 3750 | |
| 3751 return form; | |
| 3752 } | |
| 3753 | |
| 428 | 3754 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3755 while (!in_warnings && !NILP (Vpending_warnings) |
| 3756 /* well, perhaps not so safe after all! */ | |
| 3757 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3758 { |
| 3759 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3760 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3761 int speccount = internal_bind_int (&in_warnings, 1); |
| 3762 | |
| 428 | 3763 this_warning_cons = Vpending_warnings; |
| 3764 this_warning = XCAR (this_warning_cons); | |
| 3765 /* in case an error occurs in the warn function, at least | |
| 3766 it won't happen infinitely */ | |
| 3767 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3768 free_cons (this_warning_cons); |
| 1204 | 3769 class_ = XCAR (this_warning); |
| 428 | 3770 level = XCAR (XCDR (this_warning)); |
| 3771 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3772 free_list (this_warning); | |
| 3773 | |
| 3774 if (NILP (Vpending_warnings)) | |
| 3775 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3776 but safer */ | |
| 3777 | |
| 1204 | 3778 GCPRO4 (form, class_, level, messij); |
| 428 | 3779 if (!STRINGP (messij)) |
| 3780 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3781 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3782 UNGCPRO; |
| 771 | 3783 unbind_to (speccount); |
| 428 | 3784 } |
| 3785 | |
| 3786 QUIT; | |
| 814 | 3787 if (need_to_garbage_collect) |
| 428 | 3788 { |
| 3789 struct gcpro gcpro1; | |
| 3790 GCPRO1 (form); | |
| 3092 | 3791 #ifdef NEW_GC |
| 3792 gc_incremental (); | |
| 3793 #else /* not NEW_GC */ | |
| 428 | 3794 garbage_collect_1 (); |
| 3092 | 3795 #endif /* not NEW_GC */ |
| 428 | 3796 UNGCPRO; |
| 3797 } | |
| 3798 | |
| 3799 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3800 { | |
| 3801 if (max_lisp_eval_depth < 100) | |
| 3802 max_lisp_eval_depth = 100; | |
| 3803 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3804 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3805 Qunbound); | |
| 428 | 3806 } |
| 3807 | |
| 3808 /* We guaranteed CONSP (form) above */ | |
| 3809 original_fun = XCAR (form); | |
| 3810 original_args = XCDR (form); | |
| 3811 | |
| 3812 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3813 | |
| 3814 backtrace.pdlcount = specpdl_depth(); | |
| 3815 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3816 backtrace.args = &original_args; | |
| 3817 backtrace.nargs = UNEVALLED; | |
| 3818 backtrace.evalargs = 1; | |
| 3819 backtrace.debug_on_exit = 0; | |
| 1292 | 3820 backtrace.function_being_called = 0; |
| 428 | 3821 PUSH_BACKTRACE (backtrace); |
| 3822 | |
| 3823 if (debug_on_next_call) | |
| 3824 do_debug_on_call (Qt); | |
| 3825 | |
| 3826 /* At this point, only original_fun and original_args | |
| 3827 have values that will be used below. */ | |
| 3828 retry: | |
| 3989 | 3829 /* Optimise for no indirection. */ |
| 3830 fun = original_fun; | |
| 3831 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3832 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3833 { | |
| 3834 fun = indirect_function(original_fun, 1); | |
| 3835 } | |
| 428 | 3836 |
| 3837 if (SUBRP (fun)) | |
| 3838 { | |
| 3839 Lisp_Subr *subr = XSUBR (fun); | |
| 3840 int max_args = subr->max_args; | |
| 3841 | |
| 3842 if (nargs < subr->min_args) | |
| 3843 goto wrong_number_of_arguments; | |
| 3844 | |
| 3845 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3846 { | |
| 3847 backtrace.evalargs = 0; | |
| 1292 | 3848 PROFILE_ENTER_FUNCTION (); |
| 428 | 3849 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3850 (original_args)); | |
| 1292 | 3851 PROFILE_EXIT_FUNCTION (); |
| 428 | 3852 } |
| 3853 else if (nargs <= max_args) | |
| 3854 { | |
| 3855 struct gcpro gcpro1; | |
| 3856 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3857 REGISTER Lisp_Object *p = args; | |
| 3858 | |
| 3859 GCPRO1 (args[0]); | |
| 3860 gcpro1.nvars = 0; | |
| 3861 | |
| 3862 { | |
| 3863 LIST_LOOP_2 (arg, original_args) | |
| 3864 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3865 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3866 gcpro1.nvars++; |
| 3867 } | |
| 3868 } | |
| 3869 | |
| 3870 /* &optional args default to nil. */ | |
| 3871 while (p - args < max_args) | |
| 3872 *p++ = Qnil; | |
| 3873 | |
| 3874 backtrace.args = args; | |
| 3875 backtrace.nargs = nargs; | |
| 3876 | |
| 1292 | 3877 PROFILE_ENTER_FUNCTION (); |
| 428 | 3878 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3879 PROFILE_EXIT_FUNCTION (); |
| 428 | 3880 |
| 3881 UNGCPRO; | |
| 3882 } | |
| 3883 else if (max_args == MANY) | |
| 3884 { | |
| 3885 /* Pass a vector of evaluated arguments */ | |
| 3886 struct gcpro gcpro1; | |
| 3887 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3888 REGISTER Lisp_Object *p = args; | |
| 3889 | |
| 3890 GCPRO1 (args[0]); | |
| 3891 gcpro1.nvars = 0; | |
| 3892 | |
| 3893 { | |
| 3894 LIST_LOOP_2 (arg, original_args) | |
| 3895 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3896 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3897 gcpro1.nvars++; |
| 3898 } | |
| 3899 } | |
| 3900 | |
| 3901 backtrace.args = args; | |
| 3902 backtrace.nargs = nargs; | |
| 3903 | |
| 1292 | 3904 PROFILE_ENTER_FUNCTION (); |
| 428 | 3905 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3906 (nargs, args)); | |
| 1292 | 3907 PROFILE_EXIT_FUNCTION (); |
| 428 | 3908 |
| 3909 UNGCPRO; | |
| 3910 } | |
| 3911 else | |
| 3912 { | |
| 3913 wrong_number_of_arguments: | |
| 440 | 3914 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3915 } |
| 3916 } | |
| 3917 else if (COMPILED_FUNCTIONP (fun)) | |
| 3918 { | |
| 3919 struct gcpro gcpro1; | |
| 3920 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3921 REGISTER Lisp_Object *p = args; | |
| 3922 | |
| 3923 GCPRO1 (args[0]); | |
| 3924 gcpro1.nvars = 0; | |
| 3925 | |
| 3926 { | |
| 3927 LIST_LOOP_2 (arg, original_args) | |
| 3928 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3929 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3930 gcpro1.nvars++; |
| 3931 } | |
| 3932 } | |
| 3933 | |
| 3934 backtrace.args = args; | |
| 3935 backtrace.nargs = nargs; | |
| 3936 backtrace.evalargs = 0; | |
| 3937 | |
| 1292 | 3938 PROFILE_ENTER_FUNCTION (); |
| 428 | 3939 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3940 PROFILE_EXIT_FUNCTION (); |
| 428 | 3941 |
| 3942 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3943 if (backtrace.debug_on_exit) | |
| 3944 val = do_debug_on_exit (val); | |
| 3945 /* Don't do it again when we return to eval. */ | |
| 3946 backtrace.debug_on_exit = 0; | |
| 3947 | |
| 3948 UNGCPRO; | |
| 3949 } | |
| 3950 else if (CONSP (fun)) | |
| 3951 { | |
| 3952 Lisp_Object funcar = XCAR (fun); | |
| 3953 | |
| 3954 if (EQ (funcar, Qautoload)) | |
| 3955 { | |
| 970 | 3956 /* do_autoload GCPROs both arguments */ |
| 428 | 3957 do_autoload (fun, original_fun); |
| 3958 goto retry; | |
| 3959 } | |
| 3960 else if (EQ (funcar, Qmacro)) | |
| 3961 { | |
| 1292 | 3962 PROFILE_ENTER_FUNCTION (); |
| 428 | 3963 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3964 PROFILE_EXIT_FUNCTION (); |
| 428 | 3965 } |
| 3966 else if (EQ (funcar, Qlambda)) | |
| 3967 { | |
| 3968 struct gcpro gcpro1; | |
| 3969 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3970 REGISTER Lisp_Object *p = args; | |
| 3971 | |
| 3972 GCPRO1 (args[0]); | |
| 3973 gcpro1.nvars = 0; | |
| 3974 | |
| 3975 { | |
| 3976 LIST_LOOP_2 (arg, original_args) | |
| 3977 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3978 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3979 gcpro1.nvars++; |
| 3980 } | |
| 3981 } | |
| 3982 | |
| 3983 UNGCPRO; | |
| 3984 | |
| 3985 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3986 backtrace.nargs = nargs; | |
| 3987 backtrace.evalargs = 0; | |
| 3988 | |
| 1292 | 3989 PROFILE_ENTER_FUNCTION (); |
| 428 | 3990 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3991 PROFILE_EXIT_FUNCTION (); |
| 428 | 3992 |
| 3993 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3994 if (backtrace.debug_on_exit) | |
| 3995 val = do_debug_on_exit (val); | |
| 3996 /* Don't do it again when we return to eval. */ | |
| 3997 backtrace.debug_on_exit = 0; | |
| 3998 } | |
| 3999 else | |
| 4000 { | |
| 4001 goto invalid_function; | |
| 4002 } | |
| 4003 } | |
| 4104 | 4004 else if (UNBOUNDP (fun)) |
| 4005 { | |
| 4006 val = signal_void_function_error (original_fun); | |
| 4007 } | |
| 4008 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 4009 UNBOUNDP (fun)) */ | |
| 428 | 4010 { |
| 4011 invalid_function: | |
| 436 | 4012 val = signal_invalid_function_error (fun); |
| 428 | 4013 } |
| 4014 | |
| 4015 lisp_eval_depth--; | |
| 4016 if (backtrace.debug_on_exit) | |
| 4017 val = do_debug_on_exit (val); | |
| 4018 POP_BACKTRACE (backtrace); | |
| 4019 return val; | |
| 4020 } | |
| 4021 | |
| 4022 | |
| 1111 | 4023 |
| 4024 static void | |
| 4025 run_post_gc_hook (void) | |
| 4026 { | |
| 4027 Lisp_Object args[2]; | |
| 4028 | |
| 4029 args[0] = Qpost_gc_hook; | |
| 4030 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 4031 | |
| 4032 run_hook_with_args_trapping_problems | |
| 1333 | 4033 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 4034 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 4035 } | |
| 4036 | |
| 428 | 4037 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
|
4038 Call FUNCTION as a function, passing the remaining arguments to it. |
| 428 | 4039 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
|
4040 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4041 arguments: (FUNCTION &rest ARGS) |
| 428 | 4042 */ |
| 4043 (int nargs, Lisp_Object *args)) | |
| 4044 { | |
| 4045 /* This function can GC */ | |
| 4046 Lisp_Object fun; | |
| 4047 Lisp_Object val; | |
| 4162 | 4048 PROFILE_DECLARE(); |
| 428 | 4049 int fun_nargs = nargs - 1; |
| 4050 Lisp_Object *fun_args = args + 1; | |
| 4051 | |
| 1318 | 4052 /* QUIT will check for proper redisplay wrapping */ |
| 4053 | |
| 428 | 4054 QUIT; |
| 851 | 4055 |
| 4056 if (funcall_allocation_flag) | |
| 4057 { | |
| 4058 if (need_to_garbage_collect) | |
| 4059 /* Callers should gcpro lexpr args */ | |
| 3092 | 4060 #ifdef NEW_GC |
| 4061 gc_incremental (); | |
| 4062 #else /* not NEW_GC */ | |
| 851 | 4063 garbage_collect_1 (); |
| 3092 | 4064 #endif /* not NEW_GC */ |
| 851 | 4065 if (need_to_check_c_alloca) |
| 4066 { | |
| 4067 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 4068 { | |
| 4069 xemacs_c_alloca (0); | |
| 4070 funcall_alloca_count = 0; | |
| 4071 } | |
| 4072 } | |
| 887 | 4073 if (need_to_signal_post_gc) |
| 4074 { | |
| 4075 need_to_signal_post_gc = 0; | |
| 1111 | 4076 recompute_funcall_allocation_flag (); |
| 3263 | 4077 #ifdef NEW_GC |
| 4078 run_finalizers (); | |
| 4079 #endif /* NEW_GC */ | |
| 1111 | 4080 run_post_gc_hook (); |
| 887 | 4081 } |
| 851 | 4082 } |
| 428 | 4083 |
| 4084 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 4085 { | |
| 4086 if (max_lisp_eval_depth < 100) | |
| 4087 max_lisp_eval_depth = 100; | |
| 4088 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 4089 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 4090 Qunbound); | |
| 428 | 4091 } |
| 4092 | |
| 1292 | 4093 backtrace.pdlcount = specpdl_depth (); |
| 428 | 4094 backtrace.function = &args[0]; |
| 4095 backtrace.args = fun_args; | |
| 4096 backtrace.nargs = fun_nargs; | |
| 4097 backtrace.evalargs = 0; | |
| 4098 backtrace.debug_on_exit = 0; | |
| 1292 | 4099 backtrace.function_being_called = 0; |
| 428 | 4100 PUSH_BACKTRACE (backtrace); |
| 4101 | |
| 4102 if (debug_on_next_call) | |
| 4103 do_debug_on_call (Qlambda); | |
| 4104 | |
| 4105 retry: | |
| 4106 | |
| 4107 fun = args[0]; | |
| 4108 | |
| 4109 /* We could call indirect_function directly, but profiling shows | |
| 4110 this is worth optimizing by partially unrolling the loop. */ | |
| 4111 if (SYMBOLP (fun)) | |
| 4112 { | |
| 4113 fun = XSYMBOL (fun)->function; | |
| 4114 if (SYMBOLP (fun)) | |
| 4115 { | |
| 4116 fun = XSYMBOL (fun)->function; | |
| 4117 if (SYMBOLP (fun)) | |
| 4118 fun = indirect_function (fun, 1); | |
| 4119 } | |
| 4120 } | |
| 4121 | |
| 4122 if (SUBRP (fun)) | |
| 4123 { | |
| 4124 Lisp_Subr *subr = XSUBR (fun); | |
| 4125 int max_args = subr->max_args; | |
| 4126 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 4127 | |
| 4128 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 4129 { | |
| 4130 funcall_subr: | |
| 1292 | 4131 PROFILE_ENTER_FUNCTION (); |
| 428 | 4132 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 4133 PROFILE_EXIT_FUNCTION (); |
| 428 | 4134 } |
| 436 | 4135 else if (fun_nargs < subr->min_args) |
| 4136 { | |
| 4137 goto wrong_number_of_arguments; | |
| 4138 } | |
| 428 | 4139 else if (fun_nargs < max_args) |
| 4140 { | |
| 4141 Lisp_Object *p = spacious_args; | |
| 4142 | |
| 4143 /* Default optionals to nil */ | |
| 4144 while (fun_nargs--) | |
| 4145 *p++ = *fun_args++; | |
| 4146 while (p - spacious_args < max_args) | |
| 4147 *p++ = Qnil; | |
| 4148 | |
| 4149 fun_args = spacious_args; | |
| 4150 goto funcall_subr; | |
| 4151 } | |
| 4152 else if (max_args == MANY) | |
| 4153 { | |
| 1292 | 4154 PROFILE_ENTER_FUNCTION (); |
| 436 | 4155 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4156 PROFILE_EXIT_FUNCTION (); |
| 428 | 4157 } |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4158 else if (max_args == UNEVALLED) /* Can't funcall a special operator */ |
| 428 | 4159 { |
|
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
|
4160 |
|
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4161 #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
|
4162 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4163 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4164 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4165 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4166 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4167 } |
|
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
|
4168 #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
|
4169 |
| 428 | 4170 goto invalid_function; |
| 4171 } | |
| 4172 else | |
| 4173 { | |
| 4174 wrong_number_of_arguments: | |
| 436 | 4175 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4176 } |
| 4177 } | |
| 4178 else if (COMPILED_FUNCTIONP (fun)) | |
| 4179 { | |
| 1292 | 4180 PROFILE_ENTER_FUNCTION (); |
| 428 | 4181 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4182 PROFILE_EXIT_FUNCTION (); |
| 428 | 4183 } |
| 4184 else if (CONSP (fun)) | |
| 4185 { | |
| 4186 Lisp_Object funcar = XCAR (fun); | |
| 4187 | |
| 4188 if (EQ (funcar, Qlambda)) | |
| 4189 { | |
| 1292 | 4190 PROFILE_ENTER_FUNCTION (); |
| 428 | 4191 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4192 PROFILE_EXIT_FUNCTION (); |
| 428 | 4193 } |
| 4194 else if (EQ (funcar, Qautoload)) | |
| 4195 { | |
| 970 | 4196 /* do_autoload GCPROs both arguments */ |
| 428 | 4197 do_autoload (fun, args[0]); |
| 4198 goto retry; | |
| 4199 } | |
| 4200 else /* Can't funcall a macro */ | |
| 4201 { | |
| 4202 goto invalid_function; | |
| 4203 } | |
| 4204 } | |
| 4205 else if (UNBOUNDP (fun)) | |
| 4206 { | |
| 436 | 4207 val = signal_void_function_error (args[0]); |
| 428 | 4208 } |
| 4209 else | |
| 4210 { | |
| 4211 invalid_function: | |
| 436 | 4212 val = signal_invalid_function_error (fun); |
| 428 | 4213 } |
| 4214 | |
| 4215 lisp_eval_depth--; | |
| 4216 if (backtrace.debug_on_exit) | |
| 4217 val = do_debug_on_exit (val); | |
| 4218 POP_BACKTRACE (backtrace); | |
| 4219 return val; | |
| 4220 } | |
| 4221 | |
| 4222 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4223 Return t if OBJECT can be called as a function, else nil. | |
| 4224 A function is an object that can be applied to arguments, | |
| 4225 using for example `funcall' or `apply'. | |
| 4226 */ | |
| 4227 (object)) | |
| 4228 { | |
| 4229 if (SYMBOLP (object)) | |
| 4230 object = indirect_function (object, 0); | |
| 4231 | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4232 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
|
4233 || (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
|
4234 && (XSUBR (object)->max_args != UNEVALLED))) |
| 919 | 4235 return Qt; |
| 4236 if (CONSP (object)) | |
| 4237 { | |
| 4238 Lisp_Object car = XCAR (object); | |
| 4239 if (EQ (car, Qlambda)) | |
| 4240 return Qt; | |
| 4241 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
|
4242 && 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
|
4243 (Fcdr_safe (XCDR (object))))))) |
| 919 | 4244 return Qt; |
| 4245 } | |
| 4246 return Qnil; | |
| 428 | 4247 } |
| 4248 | |
| 4249 static Lisp_Object | |
| 4250 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4251 { | |
| 4252 Lisp_Object orig_function = function; | |
| 4253 Lisp_Object arglist; | |
| 4254 | |
| 4255 retry: | |
| 4256 | |
| 4257 if (SYMBOLP (function)) | |
| 4258 function = indirect_function (function, 1); | |
| 4259 | |
| 4260 if (SUBRP (function)) | |
| 4261 { | |
| 442 | 4262 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4263 if (function_min_args_p) | |
| 4264 return Fsubr_min_args (function); | |
| 4265 else | |
| 4266 return Fsubr_max_args (function); | |
| 428 | 4267 } |
| 4268 else if (COMPILED_FUNCTIONP (function)) | |
| 4269 { | |
| 814 | 4270 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4271 | |
| 1737 | 4272 if (!OPAQUEP (f->instructions)) |
| 4273 /* Lazily munge the instructions into a more efficient form */ | |
| 4274 /* Needed to set max_args */ | |
| 4275 optimize_compiled_function (function); | |
| 4276 | |
| 814 | 4277 if (function_min_args_p) |
| 4278 return make_int (f->min_args); | |
| 4279 else if (f->max_args == MANY) | |
| 4280 return Qnil; | |
| 4281 else | |
| 4282 return make_int (f->max_args); | |
| 428 | 4283 } |
| 4284 else if (CONSP (function)) | |
| 4285 { | |
| 4286 Lisp_Object funcar = XCAR (function); | |
| 4287 | |
| 4288 if (EQ (funcar, Qmacro)) | |
| 4289 { | |
| 4290 function = XCDR (function); | |
| 4291 goto retry; | |
| 4292 } | |
| 4293 else if (EQ (funcar, Qautoload)) | |
| 4294 { | |
| 970 | 4295 /* do_autoload GCPROs both arguments */ |
| 428 | 4296 do_autoload (function, orig_function); |
| 442 | 4297 function = orig_function; |
| 428 | 4298 goto retry; |
| 4299 } | |
| 4300 else if (EQ (funcar, Qlambda)) | |
| 4301 { | |
| 4302 arglist = Fcar (XCDR (function)); | |
| 4303 } | |
| 4304 else | |
| 4305 { | |
| 4306 goto invalid_function; | |
| 4307 } | |
| 4308 } | |
| 4309 else | |
| 4310 { | |
| 4311 invalid_function: | |
| 442 | 4312 return signal_invalid_function_error (orig_function); |
| 428 | 4313 } |
| 4314 | |
| 4315 { | |
| 4316 int argcount = 0; | |
| 4317 | |
| 4318 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4319 { | |
| 4320 if (EQ (arg, Qand_optional)) | |
| 4321 { | |
| 4322 if (function_min_args_p) | |
| 4323 break; | |
| 4324 } | |
| 4325 else if (EQ (arg, Qand_rest)) | |
| 4326 { | |
| 4327 if (function_min_args_p) | |
| 4328 break; | |
| 4329 else | |
| 4330 return Qnil; | |
| 4331 } | |
| 4332 else | |
| 4333 { | |
| 4334 argcount++; | |
| 4335 } | |
| 4336 } | |
| 4337 | |
| 4338 return make_int (argcount); | |
| 4339 } | |
| 4340 } | |
| 4341 | |
| 4342 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4343 Return the minimum number of arguments a function may be called with. |
| 428 | 4344 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
|
4345 any special operator, or any macro. |
| 853 | 4346 |
| 4347 To check if a function can be called with a specified number of | |
| 4348 arguments, use `function-allows-args'. | |
| 428 | 4349 */ |
| 4350 (function)) | |
| 4351 { | |
| 4352 return function_argcount (function, 1); | |
| 4353 } | |
| 4354 | |
| 4355 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4356 Return the maximum number of arguments a function may be called with. |
| 428 | 4357 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
|
4358 any special operator, or any macro. |
| 428 | 4359 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
|
4360 a built-in special operator, nil is returned. |
| 853 | 4361 |
| 4362 To check if a function can be called with a specified number of | |
| 4363 arguments, use `function-allows-args'. | |
| 428 | 4364 */ |
| 4365 (function)) | |
| 4366 { | |
| 4367 return function_argcount (function, 0); | |
| 4368 } | |
| 4369 | |
| 4370 | |
| 4371 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4372 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4373 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
|
4374 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4375 arguments: (FUNCTION &rest ARGS) |
| 428 | 4376 */ |
| 4377 (int nargs, Lisp_Object *args)) | |
| 4378 { | |
| 4379 /* This function can GC */ | |
| 4380 Lisp_Object fun = args[0]; | |
| 4381 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4382 int numargs; | |
| 4383 int funcall_nargs; | |
| 4384 | |
| 4385 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4386 | |
| 4387 if (numargs == 0) | |
| 4388 /* (apply foo 0 1 '()) */ | |
| 4389 return Ffuncall (nargs - 1, args); | |
| 4390 else if (numargs == 1) | |
| 4391 { | |
| 4392 /* (apply foo 0 1 '(2)) */ | |
| 4393 args [nargs - 1] = XCAR (spread_arg); | |
| 4394 return Ffuncall (nargs, args); | |
| 4395 } | |
| 4396 | |
| 4397 /* -1 for function, -1 for spread arg */ | |
| 4398 numargs = nargs - 2 + numargs; | |
| 4399 /* +1 for function */ | |
| 4400 funcall_nargs = 1 + numargs; | |
| 4401 | |
| 4402 if (SYMBOLP (fun)) | |
| 4403 fun = indirect_function (fun, 0); | |
| 4404 | |
| 4405 if (SUBRP (fun)) | |
| 4406 { | |
| 4407 Lisp_Subr *subr = XSUBR (fun); | |
| 4408 int max_args = subr->max_args; | |
| 4409 | |
| 4410 if (numargs < subr->min_args | |
| 4411 || (max_args >= 0 && max_args < numargs)) | |
| 4412 { | |
| 4413 /* Let funcall get the error */ | |
| 4414 } | |
| 4415 else if (max_args > numargs) | |
| 4416 { | |
| 4417 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4418 by explicitly supplying nil's for optional values */ | |
| 4419 funcall_nargs += (max_args - numargs); | |
| 4420 } | |
| 4421 } | |
| 4422 else if (UNBOUNDP (fun)) | |
| 4423 { | |
| 4424 /* Let funcall get the error */ | |
| 4425 fun = args[0]; | |
| 4426 } | |
| 4427 | |
| 4428 { | |
| 4429 REGISTER int i; | |
| 4430 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4431 struct gcpro gcpro1; | |
| 4432 | |
| 4433 GCPRO1 (*funcall_args); | |
| 4434 gcpro1.nvars = funcall_nargs; | |
| 4435 | |
| 4436 /* Copy in the unspread args */ | |
| 4437 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4438 /* Spread the last arg we got. Its first element goes in | |
| 4439 the slot that it used to occupy, hence this value of I. */ | |
| 4440 for (i = nargs - 1; | |
| 4441 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4442 i++, spread_arg = XCDR (spread_arg)) | |
| 4443 { | |
| 4444 funcall_args [i] = XCAR (spread_arg); | |
| 4445 } | |
| 4446 /* Supply nil for optional args (to subrs) */ | |
| 4447 for (; i < funcall_nargs; i++) | |
| 4448 funcall_args[i] = Qnil; | |
| 4449 | |
| 4450 | |
| 4451 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4452 } | |
| 4453 } | |
| 4454 | |
| 4455 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4456 return the result of evaluation. */ | |
| 4457 | |
| 4458 static Lisp_Object | |
| 4459 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4460 { | |
| 4461 /* This function can GC */ | |
| 442 | 4462 Lisp_Object arglist, body, tail; |
| 428 | 4463 int speccount = specpdl_depth(); |
| 4464 REGISTER int i = 0; | |
| 4465 | |
| 4466 tail = XCDR (fun); | |
| 4467 | |
| 4468 if (!CONSP (tail)) | |
| 4469 goto invalid_function; | |
| 4470 | |
| 4471 arglist = XCAR (tail); | |
| 4472 body = XCDR (tail); | |
| 4473 | |
| 4474 { | |
| 4475 int optional = 0, rest = 0; | |
| 4476 | |
| 442 | 4477 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4478 { |
| 4479 if (!SYMBOLP (symbol)) | |
| 4480 goto invalid_function; | |
| 4481 if (EQ (symbol, Qand_rest)) | |
| 4482 rest = 1; | |
| 4483 else if (EQ (symbol, Qand_optional)) | |
| 4484 optional = 1; | |
| 4485 else if (rest) | |
| 4486 { | |
| 4487 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4488 i = nargs; | |
| 4489 } | |
| 4490 else if (i < nargs) | |
| 4491 specbind (symbol, args[i++]); | |
| 4492 else if (!optional) | |
| 4493 goto wrong_number_of_arguments; | |
| 4494 else | |
| 4495 specbind (symbol, Qnil); | |
| 4496 } | |
| 4497 } | |
| 4498 | |
| 4499 if (i < nargs) | |
| 4500 goto wrong_number_of_arguments; | |
| 4501 | |
| 771 | 4502 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4503 |
| 4504 wrong_number_of_arguments: | |
| 436 | 4505 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4506 |
| 4507 invalid_function: | |
| 436 | 4508 return signal_invalid_function_error (fun); |
| 428 | 4509 } |
| 4510 | |
| 4511 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4512 /* Multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4513 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4514 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
|
4515 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4516 -- 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
|
4517 -- 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
|
4518 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4519 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4520 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
|
4521 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4522 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
|
4523 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
|
4524 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
|
4525 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
|
4526 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
|
4527 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
|
4528 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
|
4529 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
|
4530 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4531 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
|
4532 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
|
4533 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
|
4534 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
|
4535 #'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
|
4536 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
|
4537 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4538 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4539 (#'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
|
4540 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
|
4541 #'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
|
4542 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
|
4543 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
|
4544 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4545 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
|
4546 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
|
4547 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
|
4548 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
|
4549 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4550 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
|
4551 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
|
4552 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
|
4553 on being printed from within GDB. |
|
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 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
|
4556 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
|
4557 #'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
|
4558 #'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
|
4559 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
|
4560 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
|
4561 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
|
4562 *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
|
4563 not have this penalty. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4564 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4565 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
|
4566 admirable clarity by CLTL2: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4567 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4568 "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
|
4569 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
|
4570 used." |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4571 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4572 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
|
4573 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
|
4574 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
|
4575 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
|
4576 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4577 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4578 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
|
4579 Elemcount first_desired, Elemcount upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4580 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4581 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4582 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4583 Elemcount i, allocated_count; |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4584 Lisp_Object mvobj; |
|
4677
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 assert (count != 1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4588 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
|
4589 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4590 /* 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
|
4591 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4592 first_desired = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4593 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4594 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4595 if (first_desired >= count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4596 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4597 /* 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
|
4598 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4599 allocated_count = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4600 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4601 else |
|
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 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
|
4604 - first_desired); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4607 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
|
4608 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4609 contents, allocated_count); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4610 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
|
4611 mv = XMULTIPLE_VALUE (mvobj); |
|
4677
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 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4614 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4615 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4616 mv->contents[0] = first_value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4617 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4618 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
|
4619 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4620 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
|
4621 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4622 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4623 return mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4624 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4625 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4626 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4627 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
|
4628 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4629 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
|
4630 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4631 Elemcount allocated_count = mv->allocated_count; |
|
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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4634 (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
|
4635 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4636 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
|
4637 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4638 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4639 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4640 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
|
4641 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4642 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4643 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4644 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
|
4645 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4646 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
|
4647 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4648 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4649 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4650 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4651 (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
|
4652 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4653 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
|
4654 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4655 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4656 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4657 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
|
4658 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4659 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4660 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4661 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
|
4662 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4663 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
|
4664 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4665 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4666 Elemcount count = mv->count, index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4667 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4668 if (print_readably) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4669 { |
|
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
|
4670 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
|
4671 LISP_OBJECT_UID (obj)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4672 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4673 |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4674 write_fmt_string (printcharfun, |
|
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4675 "#<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
|
4676 " data (", count); |
|
4677
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 for (index = 0; index < count;) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4679 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4680 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4681 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4682 index >= (first_desired + (allocated_count - 1)))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4683 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4684 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
|
4685 index); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4686 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4687 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4688 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4689 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
|
4690 printcharfun, escapeflag); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4691 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4692 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4693 ++index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4694 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4695 if (count > 1 && index < count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4696 { |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4697 write_ascstring (printcharfun, " "); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4698 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4699 } |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4700 |
|
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
|
4701 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
|
4702 } |
|
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 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4705 mark_multiple_value (Lisp_Object obj) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4706 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4707 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
|
4708 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
|
4709 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4710 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
|
4711 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4712 mark_object (mv->contents[index]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4713 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4714 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4715 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4716 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4717 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4718 static Bytecount |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4719 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
|
4720 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4721 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
|
4722 Lisp_Object, contents, |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4723 XMULTIPLE_VALUE (obj)->allocated_count); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4724 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4725 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4726 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
|
4727 { 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
|
4728 { 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
|
4729 { 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
|
4730 { 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
|
4731 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4732 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4733 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4734 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4735 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
|
4736 mark_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4737 print_multiple_value, 0, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4738 0, /* No equal method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4739 0, /* No hash method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4740 multiple_value_description, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4741 size_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4742 struct multiple_value); |
|
4677
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 /* 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
|
4745 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
|
4746 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
|
4747 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
|
4748 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4749 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
|
4750 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4751 int result = specpdl_depth(); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4753 if (!(upper > first)) |
|
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 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
|
4756 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4757 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4758 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4759 if (upper > Vmultiple_values_limit) |
|
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 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
|
4762 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4763 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4764 /* 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
|
4765 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
|
4766 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
|
4767 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
|
4768 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4769 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
|
4770 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
|
4771 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4772 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
|
4773 if (0 == first) |
|
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 first = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4776 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4777 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4778 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4779 || first < first_desired_multiple_value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4780 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4781 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
|
4782 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4783 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4784 if (upper > multiple_value_current_limit) |
|
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 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
|
4787 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4788 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4789 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4790 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4791 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4792 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4793 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
|
4794 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4795 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4796 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4797 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
|
4798 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4799 Lisp_Object apply_args[2]; |
|
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 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4802 list_offset = head; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4803 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4804 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4805 CHECK_FUNCTION (args[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4806 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4807 /* 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
|
4808 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
|
4809 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4810 for (i = 4; i < nargs; ++i) |
|
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 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4813 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4814 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4815 Lisp_Object val; |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4816 Elemcount j, count = XMULTIPLE_VALUE_COUNT (result); |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4817 |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4818 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
|
4819 { |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4820 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
|
4821 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4822 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4823 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4824 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4825 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4826 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4827 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4828 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4830 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4831 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4832 } |
|
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 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4835 apply_args [1] = XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4836 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4837 unbind_to (speccount); |
|
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 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
|
4840 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4841 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4842 DEFUN ("multiple-value-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
|
4843 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
|
4844 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4845 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
|
4846 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
|
4847 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
|
4848 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
|
4849 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4850 arguments: (FUNCTION &rest FORMS) |
|
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 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4853 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4854 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4855 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4856 struct gcpro gcpro1; |
|
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 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
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 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
|
4861 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4862 /* 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
|
4863 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
|
4864 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4865 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4866 gcpro1.nvars = ++i; |
|
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 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4869 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4870 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4871 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
|
4872 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4873 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4874 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
|
4875 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4876 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4877 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4878 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4879 LIST_LOOP_2 (elt, XCDR (args)) |
|
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 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4882 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4883 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4884 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4885 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4886 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
|
4887 } |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4890 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
|
4891 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4892 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
|
4893 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4894 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4895 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4896 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4897 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4898 result = args[3]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4899 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4900 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4901 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4902 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4903 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4904 Lisp_Object head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4905 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4906 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
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 for (; first < upper && first < count; ++first) |
|
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 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4911 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4912 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4913 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4914 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4915 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4916 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4917 return XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4918 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4919 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4920 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4921 if (first == 0) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4922 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 return Fcons (result, Qnil); |
|
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 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4926 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4927 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4928 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4929 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4930 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4931 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4932 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
|
4933 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4934 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
|
4935 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4936 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
|
4937 Lisp, instead. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4938 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4939 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
|
4940 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
|
4941 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
|
4942 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
|
4943 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
|
4944 `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
|
4945 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4946 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
|
4947 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4948 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4949 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4950 Lisp_Object argv[4]; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4951 int first, upper, nargs; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4952 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4953 |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4954 GET_LIST_LENGTH (args, nargs); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4955 if (nargs != 3) |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4956 { |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4957 Fsignal (Qwrong_number_of_arguments, |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4958 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
|
4959 } |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4960 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4961 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
|
4962 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4963 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4964 gcpro1.nvars = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4965 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4966 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4967 argv[1] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4968 |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4969 check_integer_range (argv[1], Qzero, make_int (EMACS_INT_MAX)); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4970 check_integer_range (argv[0], Qzero, argv[1]); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4971 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4972 upper = XINT (argv[1]); |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4973 first = XINT (argv[0]); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4974 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4975 gcpro1.nvars = 2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4976 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4977 /* 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
|
4978 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
|
4979 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
|
4980 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4981 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
|
4982 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4983 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4984 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4985 /* 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
|
4986 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
|
4987 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
|
4988 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
|
4989 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
|
4990 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4991 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4992 gcpro1.nvars = 4; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4993 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4994 RETURN_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
|
4995 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4996 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4997 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
|
4998 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
|
4999 `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
|
5000 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5001 arguments: (FIRST &rest BODY) |
|
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 (args)) |
|
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 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5006 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5007 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5008 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5009 val = Feval (XCAR (args)); |
|
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 GCPRO1 (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5012 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5013 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5014 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5015 Feval (form); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5016 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5017 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5018 RETURN_UNGCPRO (val); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5021 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5022 Return all ARGS as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5023 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5024 arguments: (&rest ARGS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5025 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5026 (int nargs, Lisp_Object *args)) |
|
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 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5029 int counting = 1; |
|
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 /* 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
|
5032 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
|
5033 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5034 return nargs ? args[0] : Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5035 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5036 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5037 /* 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
|
5038 #'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
|
5039 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
|
5040 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5041 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
|
5042 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5043 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5044 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5045 for (; counting < nargs; ++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 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5048 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5049 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5050 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
|
5051 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5052 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5053 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5054 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5055 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5056 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5057 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
|
5058 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
|
5059 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5060 (list)) |
|
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 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5063 int counting = 1, listcount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5064 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5065 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5066 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5067 /* 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
|
5068 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
|
5069 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5070 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5071 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5072 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5073 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
|
5074 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5075 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5076 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5077 list = Fcdr_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5078 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5079 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5080 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5081 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5082 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5083 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5084 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5085 multiple_value_aset (result, counting, elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5086 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5087 ++counting; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5088 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5089 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5090 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5091 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5092 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5093 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5094 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5095 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
|
5096 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5097 Lisp_Object argv[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5098 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5099 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5100 argv[1] = second; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5101 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5102 return Fvalues (countof (argv), argv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5103 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5104 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5105 |
| 428 | 5106 /************************************************************************/ |
| 5107 /* Run hook variables in various ways. */ | |
| 5108 /************************************************************************/ | |
| 5109 | |
| 5110 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 5111 Run each hook in HOOKS. Major mode functions use this. | |
| 5112 Each argument should be a symbol, a hook variable. | |
| 5113 These symbols are processed in the order specified. | |
| 5114 If a hook symbol has a non-nil value, that value may be a function | |
| 5115 or a list of functions to be called to run the hook. | |
| 5116 If the value is a function, it is called with no arguments. | |
| 5117 If it is a list, the elements are called, in order, with no arguments. | |
| 5118 | |
| 5119 To make a hook variable buffer-local, use `make-local-hook', | |
| 5120 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5121 |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
5122 arguments: (FIRST &rest REST) |
| 428 | 5123 */ |
| 5124 (int nargs, Lisp_Object *args)) | |
| 5125 { | |
| 5126 REGISTER int i; | |
| 5127 | |
| 5128 for (i = 0; i < nargs; i++) | |
| 5129 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 5130 | |
| 5131 return Qnil; | |
| 5132 } | |
| 5133 | |
| 5134 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 5135 Run HOOK with the specified arguments ARGS. | |
| 5136 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 5137 value, that value may be a function or a list of functions to be | |
| 5138 called to run the hook. If the value is a function, it is called with | |
| 5139 the given arguments and its return value is returned. If it is a list | |
| 5140 of functions, those functions are called, in order, | |
| 5141 with the given arguments ARGS. | |
| 444 | 5142 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 5143 as that may change. |
| 5144 | |
| 5145 To make a hook variable buffer-local, use `make-local-hook', | |
| 5146 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5147 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5148 arguments: (HOOK &rest ARGS) |
| 428 | 5149 */ |
| 5150 (int nargs, Lisp_Object *args)) | |
| 5151 { | |
| 5152 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 5153 } | |
| 5154 | |
| 5155 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 5156 Run HOOK with the specified arguments ARGS. | |
| 5157 HOOK should be a symbol, a hook variable. Its value should | |
| 5158 be a list of functions. We call those functions, one by one, | |
| 5159 passing arguments ARGS to each of them, until one of them | |
| 5160 returns a non-nil value. Then we return that value. | |
| 5161 If all the functions return nil, we return nil. | |
| 5162 | |
| 5163 To make a hook variable buffer-local, use `make-local-hook', | |
| 5164 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5165 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5166 arguments: (HOOK &rest ARGS) |
| 428 | 5167 */ |
| 5168 (int nargs, Lisp_Object *args)) | |
| 5169 { | |
| 5170 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5171 } | |
| 5172 | |
| 5173 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5174 Run HOOK with the specified arguments ARGS. | |
| 5175 HOOK should be a symbol, a hook variable. Its value should | |
| 5176 be a list of functions. We call those functions, one by one, | |
| 5177 passing arguments ARGS to each of them, until one of them | |
| 5178 returns nil. Then we return nil. | |
| 5179 If all the functions return non-nil, we return non-nil. | |
| 5180 | |
| 5181 To make a hook variable buffer-local, use `make-local-hook', | |
| 5182 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5183 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5184 arguments: (HOOK &rest ARGS) |
| 428 | 5185 */ |
| 5186 (int nargs, Lisp_Object *args)) | |
| 5187 { | |
| 5188 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5189 } | |
| 5190 | |
| 5191 /* ARGS[0] should be a hook symbol. | |
| 5192 Call each of the functions in the hook value, passing each of them | |
| 5193 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5194 COND specifies a condition to test after each call | |
| 5195 to decide whether to stop. | |
| 5196 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5197 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5198 | |
| 5199 Lisp_Object | |
| 5200 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5201 enum run_hooks_condition cond) | |
| 5202 { | |
| 5203 Lisp_Object sym, val, ret; | |
| 5204 | |
| 5205 if (!initialized || preparing_for_armageddon) | |
| 5206 /* We need to bail out of here pronto. */ | |
| 5207 return Qnil; | |
| 5208 | |
| 3092 | 5209 #ifndef NEW_GC |
| 428 | 5210 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5211 will also be true unless something is really hosed. */ | |
| 5212 assert (!gc_in_progress); | |
| 3092 | 5213 #endif /* not NEW_GC */ |
| 428 | 5214 |
| 5215 sym = args[0]; | |
| 771 | 5216 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5217 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5218 | |
| 5219 if (UNBOUNDP (val) || NILP (val)) | |
| 5220 return ret; | |
| 5221 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5222 { | |
| 5223 args[0] = val; | |
| 5224 return Ffuncall (nargs, args); | |
| 5225 } | |
| 5226 else | |
| 5227 { | |
| 5228 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5229 Lisp_Object globals = Qnil; | |
| 5230 GCPRO3 (sym, val, globals); | |
| 5231 | |
| 5232 for (; | |
| 5233 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5234 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5235 : !NILP (ret))); | |
| 5236 val = XCDR (val)) | |
| 5237 { | |
| 5238 if (EQ (XCAR (val), Qt)) | |
| 5239 { | |
| 5240 /* t indicates this hook has a local binding; | |
| 5241 it means to run the global binding too. */ | |
| 5242 globals = Fdefault_value (sym); | |
| 5243 | |
| 5244 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5245 ! NILP (globals)) | |
| 5246 { | |
| 5247 args[0] = globals; | |
| 5248 ret = Ffuncall (nargs, args); | |
| 5249 } | |
| 5250 else | |
| 5251 { | |
| 5252 for (; | |
| 5253 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5254 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5255 ? NILP (ret) | |
| 5256 : !NILP (ret))); | |
| 5257 globals = XCDR (globals)) | |
| 5258 { | |
| 5259 args[0] = XCAR (globals); | |
| 5260 /* In a global value, t should not occur. If it does, we | |
| 5261 must ignore it to avoid an endless loop. */ | |
| 5262 if (!EQ (args[0], Qt)) | |
| 5263 ret = Ffuncall (nargs, args); | |
| 5264 } | |
| 5265 } | |
| 5266 } | |
| 5267 else | |
| 5268 { | |
| 5269 args[0] = XCAR (val); | |
| 5270 ret = Ffuncall (nargs, args); | |
| 5271 } | |
| 5272 } | |
| 5273 | |
| 5274 UNGCPRO; | |
| 5275 return ret; | |
| 5276 } | |
| 5277 } | |
| 5278 | |
| 5279 Lisp_Object | |
| 5280 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5281 enum run_hooks_condition cond) | |
| 5282 { | |
| 5283 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5284 } | |
| 5285 | |
| 5286 #if 0 | |
| 5287 | |
| 853 | 5288 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5289 |
| 5290 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5291 present value of that symbol. | |
| 5292 Call each element of FUNLIST, | |
| 5293 passing each of them the rest of ARGS. | |
| 5294 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5295 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5296 | |
| 5297 Lisp_Object | |
| 5298 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5299 { | |
| 853 | 5300 omitted; |
| 428 | 5301 } |
| 5302 | |
| 5303 #endif /* 0 */ | |
| 5304 | |
| 5305 void | |
| 5306 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5307 { | |
| 5308 /* This function can GC */ | |
| 5309 struct gcpro gcpro1; | |
| 5310 int i; | |
| 5311 va_list vargs; | |
| 5312 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5313 | |
| 5314 va_start (vargs, nargs); | |
| 5315 funcall_args[0] = hook_var; | |
| 5316 for (i = 0; i < nargs; i++) | |
| 5317 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5318 va_end (vargs); | |
| 5319 | |
| 5320 GCPRO1 (*funcall_args); | |
| 5321 gcpro1.nvars = nargs + 1; | |
| 5322 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5323 UNGCPRO; | |
| 5324 } | |
| 5325 | |
| 5326 void | |
| 5327 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5328 int nargs, ...) | |
| 5329 { | |
| 5330 /* This function can GC */ | |
| 5331 struct gcpro gcpro1; | |
| 5332 int i; | |
| 5333 va_list vargs; | |
| 5334 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5335 | |
| 5336 va_start (vargs, nargs); | |
| 5337 funcall_args[0] = hook_var; | |
| 5338 for (i = 0; i < nargs; i++) | |
| 5339 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5340 va_end (vargs); | |
| 5341 | |
| 5342 GCPRO1 (*funcall_args); | |
| 5343 gcpro1.nvars = nargs + 1; | |
| 5344 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5345 RUN_HOOKS_TO_COMPLETION); | |
| 5346 UNGCPRO; | |
| 5347 } | |
| 5348 | |
| 5349 Lisp_Object | |
| 5350 run_hook (Lisp_Object hook) | |
| 5351 { | |
| 853 | 5352 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5353 } |
| 5354 | |
| 5355 | |
| 5356 /************************************************************************/ | |
| 5357 /* Front-ends to eval, funcall, apply */ | |
| 5358 /************************************************************************/ | |
| 5359 | |
| 5360 /* Apply fn to arg */ | |
| 5361 Lisp_Object | |
| 5362 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5363 { | |
| 5364 /* This function can GC */ | |
| 5365 struct gcpro gcpro1; | |
| 5366 Lisp_Object args[2]; | |
| 5367 | |
| 5368 if (NILP (arg)) | |
| 5369 return Ffuncall (1, &fn); | |
| 5370 GCPRO1 (args[0]); | |
| 5371 gcpro1.nvars = 2; | |
| 5372 args[0] = fn; | |
| 5373 args[1] = arg; | |
| 5374 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5375 } | |
| 5376 | |
| 5377 /* Call function fn on no arguments */ | |
| 5378 Lisp_Object | |
| 5379 call0 (Lisp_Object fn) | |
| 5380 { | |
| 5381 /* This function can GC */ | |
| 5382 struct gcpro gcpro1; | |
| 5383 | |
| 5384 GCPRO1 (fn); | |
| 5385 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5386 } | |
| 5387 | |
| 5388 /* Call function fn with argument arg0 */ | |
| 5389 Lisp_Object | |
| 5390 call1 (Lisp_Object fn, | |
| 5391 Lisp_Object arg0) | |
| 5392 { | |
| 5393 /* This function can GC */ | |
| 5394 struct gcpro gcpro1; | |
| 5395 Lisp_Object args[2]; | |
| 5396 args[0] = fn; | |
| 5397 args[1] = arg0; | |
| 5398 GCPRO1 (args[0]); | |
| 5399 gcpro1.nvars = 2; | |
| 5400 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5401 } | |
| 5402 | |
| 5403 /* Call function fn with arguments arg0, arg1 */ | |
| 5404 Lisp_Object | |
| 5405 call2 (Lisp_Object fn, | |
| 5406 Lisp_Object arg0, Lisp_Object arg1) | |
| 5407 { | |
| 5408 /* This function can GC */ | |
| 5409 struct gcpro gcpro1; | |
| 5410 Lisp_Object args[3]; | |
| 5411 args[0] = fn; | |
| 5412 args[1] = arg0; | |
| 5413 args[2] = arg1; | |
| 5414 GCPRO1 (args[0]); | |
| 5415 gcpro1.nvars = 3; | |
| 5416 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5417 } | |
| 5418 | |
| 5419 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5420 Lisp_Object | |
| 5421 call3 (Lisp_Object fn, | |
| 5422 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5423 { | |
| 5424 /* This function can GC */ | |
| 5425 struct gcpro gcpro1; | |
| 5426 Lisp_Object args[4]; | |
| 5427 args[0] = fn; | |
| 5428 args[1] = arg0; | |
| 5429 args[2] = arg1; | |
| 5430 args[3] = arg2; | |
| 5431 GCPRO1 (args[0]); | |
| 5432 gcpro1.nvars = 4; | |
| 5433 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5434 } | |
| 5435 | |
| 5436 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5437 Lisp_Object | |
| 5438 call4 (Lisp_Object fn, | |
| 5439 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5440 Lisp_Object arg3) | |
| 5441 { | |
| 5442 /* This function can GC */ | |
| 5443 struct gcpro gcpro1; | |
| 5444 Lisp_Object args[5]; | |
| 5445 args[0] = fn; | |
| 5446 args[1] = arg0; | |
| 5447 args[2] = arg1; | |
| 5448 args[3] = arg2; | |
| 5449 args[4] = arg3; | |
| 5450 GCPRO1 (args[0]); | |
| 5451 gcpro1.nvars = 5; | |
| 5452 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5453 } | |
| 5454 | |
| 5455 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5456 Lisp_Object | |
| 5457 call5 (Lisp_Object fn, | |
| 5458 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5459 Lisp_Object arg3, Lisp_Object arg4) | |
| 5460 { | |
| 5461 /* This function can GC */ | |
| 5462 struct gcpro gcpro1; | |
| 5463 Lisp_Object args[6]; | |
| 5464 args[0] = fn; | |
| 5465 args[1] = arg0; | |
| 5466 args[2] = arg1; | |
| 5467 args[3] = arg2; | |
| 5468 args[4] = arg3; | |
| 5469 args[5] = arg4; | |
| 5470 GCPRO1 (args[0]); | |
| 5471 gcpro1.nvars = 6; | |
| 5472 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5473 } | |
| 5474 | |
| 5475 Lisp_Object | |
| 5476 call6 (Lisp_Object fn, | |
| 5477 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5478 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5479 { | |
| 5480 /* This function can GC */ | |
| 5481 struct gcpro gcpro1; | |
| 5482 Lisp_Object args[7]; | |
| 5483 args[0] = fn; | |
| 5484 args[1] = arg0; | |
| 5485 args[2] = arg1; | |
| 5486 args[3] = arg2; | |
| 5487 args[4] = arg3; | |
| 5488 args[5] = arg4; | |
| 5489 args[6] = arg5; | |
| 5490 GCPRO1 (args[0]); | |
| 5491 gcpro1.nvars = 7; | |
| 5492 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5493 } | |
| 5494 | |
| 5495 Lisp_Object | |
| 5496 call7 (Lisp_Object fn, | |
| 5497 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5498 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5499 Lisp_Object arg6) | |
| 5500 { | |
| 5501 /* This function can GC */ | |
| 5502 struct gcpro gcpro1; | |
| 5503 Lisp_Object args[8]; | |
| 5504 args[0] = fn; | |
| 5505 args[1] = arg0; | |
| 5506 args[2] = arg1; | |
| 5507 args[3] = arg2; | |
| 5508 args[4] = arg3; | |
| 5509 args[5] = arg4; | |
| 5510 args[6] = arg5; | |
| 5511 args[7] = arg6; | |
| 5512 GCPRO1 (args[0]); | |
| 5513 gcpro1.nvars = 8; | |
| 5514 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5515 } | |
| 5516 | |
| 5517 Lisp_Object | |
| 5518 call8 (Lisp_Object fn, | |
| 5519 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5520 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5521 Lisp_Object arg6, Lisp_Object arg7) | |
| 5522 { | |
| 5523 /* This function can GC */ | |
| 5524 struct gcpro gcpro1; | |
| 5525 Lisp_Object args[9]; | |
| 5526 args[0] = fn; | |
| 5527 args[1] = arg0; | |
| 5528 args[2] = arg1; | |
| 5529 args[3] = arg2; | |
| 5530 args[4] = arg3; | |
| 5531 args[5] = arg4; | |
| 5532 args[6] = arg5; | |
| 5533 args[7] = arg6; | |
| 5534 args[8] = arg7; | |
| 5535 GCPRO1 (args[0]); | |
| 5536 gcpro1.nvars = 9; | |
| 5537 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5538 } | |
| 5539 | |
| 5540 Lisp_Object | |
| 5541 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5542 { | |
| 5543 if (current_buffer == buf) | |
| 5544 return call0 (fn); | |
| 5545 else | |
| 5546 { | |
| 5547 Lisp_Object val; | |
| 5548 int speccount = specpdl_depth(); | |
| 5549 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5550 set_buffer_internal (buf); | |
| 5551 val = call0 (fn); | |
| 771 | 5552 unbind_to (speccount); |
| 428 | 5553 return val; |
| 5554 } | |
| 5555 } | |
| 5556 | |
| 5557 Lisp_Object | |
| 5558 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5559 Lisp_Object arg0) | |
| 5560 { | |
| 5561 if (current_buffer == buf) | |
| 5562 return call1 (fn, arg0); | |
| 5563 else | |
| 5564 { | |
| 5565 Lisp_Object val; | |
| 5566 int speccount = specpdl_depth(); | |
| 5567 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5568 set_buffer_internal (buf); | |
| 5569 val = call1 (fn, arg0); | |
| 771 | 5570 unbind_to (speccount); |
| 428 | 5571 return val; |
| 5572 } | |
| 5573 } | |
| 5574 | |
| 5575 Lisp_Object | |
| 5576 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5577 Lisp_Object arg0, Lisp_Object arg1) | |
| 5578 { | |
| 5579 if (current_buffer == buf) | |
| 5580 return call2 (fn, arg0, arg1); | |
| 5581 else | |
| 5582 { | |
| 5583 Lisp_Object val; | |
| 5584 int speccount = specpdl_depth(); | |
| 5585 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5586 set_buffer_internal (buf); | |
| 5587 val = call2 (fn, arg0, arg1); | |
| 771 | 5588 unbind_to (speccount); |
| 428 | 5589 return val; |
| 5590 } | |
| 5591 } | |
| 5592 | |
| 5593 Lisp_Object | |
| 5594 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5595 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5596 { | |
| 5597 if (current_buffer == buf) | |
| 5598 return call3 (fn, arg0, arg1, arg2); | |
| 5599 else | |
| 5600 { | |
| 5601 Lisp_Object val; | |
| 5602 int speccount = specpdl_depth(); | |
| 5603 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5604 set_buffer_internal (buf); | |
| 5605 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5606 unbind_to (speccount); |
| 428 | 5607 return val; |
| 5608 } | |
| 5609 } | |
| 5610 | |
| 5611 Lisp_Object | |
| 5612 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5613 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5614 Lisp_Object arg3) | |
| 5615 { | |
| 5616 if (current_buffer == buf) | |
| 5617 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5618 else | |
| 5619 { | |
| 5620 Lisp_Object val; | |
| 5621 int speccount = specpdl_depth(); | |
| 5622 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5623 set_buffer_internal (buf); | |
| 5624 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5625 unbind_to (speccount); |
| 428 | 5626 return val; |
| 5627 } | |
| 5628 } | |
| 5629 | |
| 5630 Lisp_Object | |
| 5631 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5632 { | |
| 5633 if (current_buffer == buf) | |
| 5634 return Feval (form); | |
| 5635 else | |
| 5636 { | |
| 5637 Lisp_Object val; | |
| 5638 int speccount = specpdl_depth(); | |
| 5639 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5640 set_buffer_internal (buf); | |
| 5641 val = Feval (form); | |
| 771 | 5642 unbind_to (speccount); |
| 428 | 5643 return val; |
| 5644 } | |
| 5645 } | |
| 5646 | |
| 5647 | |
| 5648 /************************************************************************/ | |
| 5649 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5650 /************************************************************************/ | |
| 5651 | |
| 853 | 5652 int |
| 5653 get_inhibit_flags (void) | |
| 5654 { | |
| 5655 return inhibit_flags; | |
| 5656 } | |
| 5657 | |
| 5658 void | |
| 2286 | 5659 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5660 { |
| 5661 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5662 { | |
| 5663 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5664 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5665 invalid_change | |
| 5666 ("Modification of this buffer not currently permitted", obj); | |
| 5667 } | |
| 5668 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5669 { | |
| 5670 if (what == OPERATION_DELETE_OBJECT | |
| 5671 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5672 || CONSOLEP (obj)) | |
| 5673 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5674 invalid_change | |
| 5675 ("Deletion of this object not currently permitted", obj); | |
| 5676 } | |
| 5677 } | |
| 5678 | |
| 5679 void | |
| 5680 note_object_created (Lisp_Object obj) | |
| 5681 { | |
| 5682 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5683 { | |
| 5684 if (BUFFERP (obj)) | |
| 5685 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5686 } | |
| 5687 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5688 { | |
| 5689 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5690 || CONSOLEP (obj)) | |
| 5691 Vdeletable_permanent_display_objects = | |
| 5692 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5693 } | |
| 5694 } | |
| 5695 | |
| 5696 void | |
| 5697 note_object_deleted (Lisp_Object obj) | |
| 5698 { | |
| 5699 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5700 { | |
| 5701 if (BUFFERP (obj)) | |
| 5702 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5703 } | |
| 5704 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5705 { | |
| 5706 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5707 || CONSOLEP (obj)) | |
| 5708 Vdeletable_permanent_display_objects = | |
| 5709 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5710 } | |
| 5711 } | |
| 5712 | |
| 5713 struct call_trapping_problems | |
| 5714 { | |
| 5715 Lisp_Object catchtag; | |
| 5716 Lisp_Object error_conditions; | |
| 5717 Lisp_Object data; | |
| 5718 Lisp_Object backtrace; | |
| 5719 Lisp_Object warning_class; | |
| 5720 | |
| 867 | 5721 const CIbyte *warning_string; |
| 853 | 5722 Lisp_Object (*fun) (void *); |
| 5723 void *arg; | |
| 5724 }; | |
| 428 | 5725 |
| 2532 | 5726 static Lisp_Object |
| 5727 maybe_get_trapping_problems_backtrace (void) | |
| 5728 { | |
| 5729 Lisp_Object backtrace; | |
| 853 | 5730 |
| 1123 | 5731 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5732 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5733 { |
| 1333 | 5734 struct gcpro gcpro1; |
| 5735 Lisp_Object lstream = Qnil; | |
| 5736 int speccount = specpdl_depth (); | |
| 5737 | |
| 853 | 5738 /* We're no longer protected against errors or quit here, so at |
| 5739 least let's temporarily inhibit quit. We definitely do not | |
| 5740 want to inhibit quit during the calling of the function | |
| 5741 itself!!!!!!!!!!! */ | |
| 5742 | |
| 5743 specbind (Qinhibit_quit, Qt); | |
| 5744 | |
| 5745 GCPRO1 (lstream); | |
| 5746 lstream = make_resizing_buffer_output_stream (); | |
| 5747 Fbacktrace (lstream, Qt); | |
| 5748 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5749 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5750 Lstream_delete (XLSTREAM (lstream)); |
| 5751 UNGCPRO; | |
| 5752 | |
| 5753 unbind_to (speccount); | |
| 428 | 5754 } |
| 853 | 5755 else |
| 2532 | 5756 backtrace = Qnil; |
| 5757 | |
| 5758 return backtrace; | |
| 5759 } | |
| 5760 | |
| 5761 static DECLARE_DOESNT_RETURN_TYPE | |
| 5762 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5763 | |
| 5764 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5765 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5766 Lisp_Object opaque) | |
| 5767 { | |
| 5768 struct call_trapping_problems *p = | |
| 5769 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5770 | |
| 5771 if (!EQ (error_conditions, Qquit)) | |
| 5772 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5773 else | |
| 853 | 5774 p->backtrace = Qnil; |
| 5775 p->error_conditions = error_conditions; | |
| 5776 p->data = data; | |
| 5777 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5778 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5779 RETURN_NOT_REACHED (Qnil); |
| 853 | 5780 } |
| 5781 | |
| 5782 static Lisp_Object | |
| 5783 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5784 { | |
| 5785 struct call_trapping_problems *p = | |
| 5786 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5787 | |
| 5788 return (p->fun) (p->arg); | |
| 428 | 5789 } |
| 5790 | |
| 5791 static Lisp_Object | |
| 853 | 5792 call_trapping_problems_1 (Lisp_Object opaque) |
| 5793 { | |
| 5794 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5795 call_trapping_problems_2, opaque); | |
| 5796 } | |
| 5797 | |
| 1333 | 5798 static void |
| 5799 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5800 const CIbyte *warning_string, | |
| 5801 struct call_trapping_problems_result *p) | |
| 5802 { | |
| 5803 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5804 { | |
| 5805 int depth = specpdl_depth (); | |
| 5806 | |
| 5807 /* We're no longer protected against errors or quit here, so at | |
| 5808 least let's temporarily inhibit quit. */ | |
| 5809 specbind (Qinhibit_quit, Qt); | |
| 5810 | |
| 5811 if (p->caught_throw) | |
| 5812 { | |
| 5813 Lisp_Object errstr = | |
| 5814 emacs_sprintf_string_lisp | |
| 2532 | 5815 ("%s: Attempt to throw outside of function:" |
| 5816 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5817 Qnil, 4, |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5818 build_msg_cistring (warning_string ? warning_string : "error"), |
| 2532 | 5819 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5820 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5821 } | |
| 2421 | 5822 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5823 { |
| 5824 Lisp_Object errstr; | |
| 5825 /* #### This should call | |
| 5826 (with-output-to-string (display-error (cons error_conditions | |
| 5827 data)) | |
| 5828 but that stuff is all in Lisp currently. */ | |
| 5829 errstr = | |
| 5830 emacs_sprintf_string_lisp | |
| 5831 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5832 Qnil, 4, | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5833 build_msg_cistring (warning_string ? warning_string : "error"), |
| 1333 | 5834 p->error_conditions, p->data, p->backtrace); |
| 5835 | |
| 5836 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5837 errstr); | |
| 5838 } | |
| 5839 | |
| 5840 unbind_to (depth); | |
| 5841 } | |
| 5842 } | |
| 5843 | |
| 1318 | 5844 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5845 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5846 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5847 use call_trapping_problems() for that. Turn the flags off with | |
| 5848 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5849 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5850 various other flags). */ | |
| 5851 | |
| 5852 int | |
| 5853 set_trapping_problems_flags (int flags) | |
| 5854 { | |
| 5855 int new_inhibit_flags; | |
| 5856 | |
| 5857 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5858 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5859 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5860 | INHIBIT_ENTERING_DEBUGGER | |
| 5861 | INHIBIT_WARNING_ISSUE | |
| 5862 | INHIBIT_GC; | |
| 5863 | |
| 5864 new_inhibit_flags = inhibit_flags | flags; | |
| 5865 if (new_inhibit_flags != inhibit_flags) | |
| 5866 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5867 | |
| 5868 if (flags & INHIBIT_QUIT) | |
| 5869 specbind (Qinhibit_quit, Qt); | |
| 5870 | |
| 5871 if (flags & UNINHIBIT_QUIT) | |
| 5872 begin_do_check_for_quit (); | |
| 5873 | |
| 5874 if (flags & INHIBIT_GC) | |
| 5875 begin_gc_forbidden (); | |
| 5876 | |
| 5877 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5878 inner one creates some buffers/etc., should the outer one be able | |
| 5879 to delete them? I think so, but it means we need to combine rather | |
| 5880 than just reset the value. */ | |
| 5881 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5882 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5883 | |
| 5884 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5885 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5886 | |
| 5887 return flags; | |
| 5888 } | |
| 5889 | |
| 853 | 5890 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5891 can be trapped or inhibited, according to FLAGS. | |
| 5892 | |
| 5893 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5894 the error is caught and a warning is issued, specifying the | |
| 5895 specific error that occurred and a backtrace. In that case, | |
| 5896 WARNING_STRING should be given, and will be printed at the | |
| 5897 beginning of the error to indicate where the error occurred. | |
| 5898 | |
| 5899 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5900 `throw' out of the function being called are trapped, and a warning | |
| 5901 issued. (Again, WARNING_STRING should be given.) | |
| 5902 | |
| 2367 | 5903 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5904 this applies to recursive invocations of call_trapping_problems, too. |
| 5905 | |
| 1333 | 5906 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5907 but values useful for generating a warning are still computed (in | |
| 5908 particular, the backtrace), so that the calling function can issue | |
| 5909 a warning. | |
| 5910 | |
| 853 | 5911 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5912 issued, but at level `debug', which normally is below the minimum | |
| 5913 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5914 be ignored entirely. The user can change this variable, however, | |
| 5915 to see the warnings.) | |
| 5916 | |
| 5917 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5918 given, you are *guaranteed* that there will be no non-local exits | |
| 5919 out of this function. | |
| 5920 | |
| 5921 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5922 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5923 automatically caught as well, and treated as an error; you can | |
| 5924 check for this using EQ (problems->error_conditions, Qquit). | |
| 5925 | |
| 5926 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5927 turned on. (It will abort the code being called, but will still be | |
| 5928 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5929 given.) This is useful when QUIT checking has been turned off by a | |
| 5930 higher-level caller. | |
| 5931 | |
| 5932 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5933 This is useful for Lisp called within redisplay, for example. |
| 853 | 5934 |
| 5935 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5936 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5937 or consoles that were already in existence at the time this function | |
| 5938 was called. (However, it's perfectly legal for code to create a new | |
| 5939 buffer and then delete it.) | |
| 5940 | |
| 5941 #### It might be useful to have a flag that inhibits deletion of a | |
| 5942 specific permanent display object and everything it's attached to | |
| 5943 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5944 attached to. | |
| 5945 | |
| 5946 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5947 code is not allowed to modify the text of any buffers that were | |
| 5948 already in existence at the time this function was called. | |
| 5949 (However, it's perfectly legal for code to create a new buffer and | |
| 5950 then modify its text.) | |
| 5951 | |
| 5952 [These last two flags are implemented using global variables | |
| 5953 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5954 which keep track of a list of all buffers or permanent display | |
| 5955 objects created since the last time one of these flags was set. | |
| 5956 The code that deletes buffers, etc. and modifies buffers checks | |
| 5957 | |
| 5958 (1) if the corresponding flag is set (through the global variable | |
| 5959 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5960 | |
| 5961 (2) if the object to be modified or deleted is not in the | |
| 5962 appropriate list. | |
| 5963 | |
| 5964 If so, it signals an error. | |
| 5965 | |
| 5966 Recursive calls to call_trapping_problems() are allowed. In | |
| 5967 the case of the two flags mentioned above, the current values | |
| 5968 of the global variables are stored in an unwind-protect, and | |
| 5969 they're reset to nil.] | |
| 5970 | |
| 5971 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5972 be entered if an error occurs inside the Lisp code being called, | |
| 5973 even when the user has requested an error. In such case, a warning | |
| 5974 is issued stating that access to the debugger is denied, unless | |
| 5975 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5976 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5977 in such cases either the display is in an inconsistent state or | |
| 5978 doing window operations is explicitly forbidden by the OS, and the | |
| 5979 debugger would causes visual changes on the screen and might create | |
| 5980 another frame. | |
| 5981 | |
| 5982 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5983 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5984 specifiers relating to display, other variables relating to | |
| 5985 display, splitting, deleting, or resizing windows or frames, | |
| 5986 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5987 allowed. This is for things called absolutely in the middle of | |
| 5988 redisplay, which expects things to be *exactly* the same after the | |
| 5989 call as before. This isn't completely implemented and needs to be | |
| 5990 thought out some more to determine exactly what its semantics are. | |
| 5991 For the moment, turning on this flag also turns on | |
| 5992 | |
| 5993 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5994 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5995 INHIBIT_ENTERING_DEBUGGER | |
| 5996 INHIBIT_WARNING_ISSUE | |
| 5997 INHIBIT_GC | |
| 5998 | |
| 5999 #### The following five flags are defined, but unimplemented: | |
| 6000 | |
| 6001 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 6002 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 6003 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 6004 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 6005 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 6006 | |
| 6007 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 6008 call_with_suspended_errors() was invoked. This exists only for | |
| 6009 debugging purposes -- often we want to break when a signal happens, | |
| 6010 but ignore signals from call_with_suspended_errors(), because they | |
| 6011 occur often and for legitimate reasons. | |
| 6012 | |
| 6013 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 6014 which exact information about any occurring problems (either an | |
| 6015 error or an attempted throw past this boundary). | |
| 6016 | |
| 6017 If a problem occurred and aborted operation (error, quit, or | |
| 6018 invalid throw), Qunbound is returned. Otherwise the return value | |
| 6019 from the call to (*fun) (arg) is returned. */ | |
| 6020 | |
| 6021 Lisp_Object | |
| 6022 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6023 const CIbyte *warning_string, |
| 853 | 6024 int flags, |
| 6025 struct call_trapping_problems_result *problem, | |
| 6026 Lisp_Object (*fun) (void *), | |
| 6027 void *arg) | |
| 6028 { | |
| 1318 | 6029 int speccount = specpdl_depth (); |
| 853 | 6030 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 6031 struct call_trapping_problems package; | |
| 1333 | 6032 struct call_trapping_problems_result real_problem; |
| 2532 | 6033 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 6034 int thrown = 0; |
| 6035 | |
| 6036 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 6037 assert (!NILP (warning_class)); | |
| 6038 | |
| 6039 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 6040 | |
| 6041 package.warning_class = warning_class; | |
| 6042 package.warning_string = warning_string; | |
| 6043 package.fun = fun; | |
| 6044 package.arg = arg; | |
| 6045 package.catchtag = | |
| 6046 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 6047 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 6048 Qnil; | |
| 6049 package.error_conditions = Qnil; | |
| 6050 package.data = Qnil; | |
| 6051 package.backtrace = Qnil; | |
| 6052 | |
| 1318 | 6053 flags = set_trapping_problems_flags (flags); |
| 853 | 6054 |
| 6055 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 6056 opaque = make_opaque_ptr (&package); | |
| 6057 else | |
| 6058 opaque = Qnil; | |
| 6059 | |
| 6060 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 6061 package.backtrace, opaque); | |
| 6062 | |
| 6063 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 6064 /* We need a catch so that our condition-handler can throw back here | |
| 6065 after printing the warning. (We print the warning in the stack | |
| 6066 context of the error, so we can get a backtrace.) */ | |
| 6067 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 6068 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6069 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 6070 /* We skip over the first wrapper, which traps errors. */ | |
| 6071 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 6072 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6073 else |
| 6074 /* Nothing special. */ | |
| 6075 tem = (fun) (arg); | |
| 6076 | |
| 1333 | 6077 if (!problem) |
| 6078 problem = &real_problem; | |
| 6079 | |
| 6080 if (!thrown) | |
| 853 | 6081 { |
| 1333 | 6082 problem->caught_error = 0; |
| 6083 problem->caught_throw = 0; | |
| 6084 problem->error_conditions = Qnil; | |
| 6085 problem->data = Qnil; | |
| 6086 problem->backtrace = Qnil; | |
| 6087 problem->thrown_tag = Qnil; | |
| 6088 problem->thrown_value = Qnil; | |
| 853 | 6089 } |
| 1333 | 6090 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 6091 { |
| 1333 | 6092 problem->caught_error = 1; |
| 6093 problem->caught_throw = 0; | |
| 6094 problem->error_conditions = package.error_conditions; | |
| 6095 problem->data = package.data; | |
| 6096 problem->backtrace = package.backtrace; | |
| 6097 problem->thrown_tag = Qnil; | |
| 6098 problem->thrown_value = Qnil; | |
| 853 | 6099 } |
| 1333 | 6100 else |
| 6101 { | |
| 6102 problem->caught_error = 0; | |
| 6103 problem->caught_throw = 1; | |
| 6104 problem->error_conditions = Qnil; | |
| 6105 problem->data = Qnil; | |
| 2532 | 6106 problem->backtrace = thrown_backtrace; |
| 1333 | 6107 problem->thrown_tag = thrown_tag; |
| 6108 problem->thrown_value = tem; | |
| 6109 } | |
| 6110 | |
| 6111 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 6112 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 6113 problem); | |
| 853 | 6114 |
| 6115 if (!NILP (package.catchtag) && | |
| 6116 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 6117 free_opaque_ptr (package.catchtag); | |
| 6118 | |
| 6119 if (!NILP (opaque)) | |
| 6120 free_opaque_ptr (opaque); | |
| 6121 | |
| 6122 unbind_to (speccount); | |
| 6123 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 6124 } | |
| 6125 | |
| 6126 struct va_call_trapping_problems | |
| 6127 { | |
| 6128 lisp_fn_t fun; | |
| 6129 int nargs; | |
| 6130 Lisp_Object *args; | |
| 6131 }; | |
| 6132 | |
| 6133 static Lisp_Object | |
| 6134 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 6135 { | |
| 6136 struct va_call_trapping_problems *ai_no_corrida = | |
| 6137 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 6138 Lisp_Object pegar_no_bumbum; | |
| 6139 | |
| 6140 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 6141 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 6142 return pegar_no_bumbum; | |
| 6143 } | |
| 6144 | |
| 6145 /* #### document me. */ | |
| 6146 | |
| 6147 Lisp_Object | |
| 6148 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6149 const CIbyte *warning_string, |
| 853 | 6150 int flags, |
| 6151 struct call_trapping_problems_result *problem, | |
| 6152 lisp_fn_t fun, int nargs, ...) | |
| 6153 { | |
| 6154 va_list vargs; | |
| 6155 Lisp_Object args[20]; | |
| 6156 int i; | |
| 6157 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6158 struct gcpro gcpro1; | |
| 6159 | |
| 6160 assert (nargs >= 0 && nargs < 20); | |
| 6161 | |
| 6162 va_start (vargs, nargs); | |
| 6163 for (i = 0; i < nargs; i++) | |
| 6164 args[i] = va_arg (vargs, Lisp_Object); | |
| 6165 va_end (vargs); | |
| 6166 | |
| 6167 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6168 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6169 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6170 | |
| 6171 GCPRO1_ARRAY (args, nargs); | |
| 6172 RETURN_UNGCPRO | |
| 6173 (call_trapping_problems | |
| 6174 (warning_class, warning_string, flags, problem, | |
| 6175 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6176 } | |
| 6177 | |
| 6178 /* this is an older interface, barely different from | |
| 6179 va_call_trapping_problems. | |
| 6180 | |
| 6181 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6182 va_call_trapping_problems(). */ | |
| 6183 | |
| 6184 Lisp_Object | |
| 6185 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6186 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6187 int nargs, ...) |
| 6188 { | |
| 6189 va_list vargs; | |
| 6190 Lisp_Object args[20]; | |
| 6191 int i; | |
| 6192 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6193 int flags; | |
| 6194 struct gcpro gcpro1; | |
| 6195 | |
| 1204 | 6196 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6197 assert (!NILP (class_)); | |
| 853 | 6198 assert (nargs >= 0 && nargs < 20); |
| 6199 | |
| 6200 va_start (vargs, nargs); | |
| 6201 for (i = 0; i < nargs; i++) | |
| 6202 args[i] = va_arg (vargs, Lisp_Object); | |
| 6203 va_end (vargs); | |
| 6204 | |
| 6205 /* If error-checking is not disabled, just call the function. */ | |
| 6206 | |
| 6207 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6208 { | |
| 6209 Lisp_Object val; | |
| 6210 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6211 return val; | |
| 6212 } | |
| 6213 | |
| 6214 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6215 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6216 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6217 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6218 else | |
| 6219 { | |
| 6220 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6221 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6222 } | |
| 6223 | |
| 6224 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6225 | |
| 6226 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6227 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6228 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6229 | |
| 6230 GCPRO1_ARRAY (args, nargs); | |
| 6231 { | |
| 6232 Lisp_Object its_way_too_goddamn_late = | |
| 6233 call_trapping_problems | |
| 1204 | 6234 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6235 &fazer_invocacao_atrapalhando_problemas); |
| 6236 UNGCPRO; | |
| 6237 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6238 return retval; | |
| 6239 else | |
| 6240 return its_way_too_goddamn_late; | |
| 6241 } | |
| 6242 } | |
| 6243 | |
| 6244 struct calln_trapping_problems | |
| 6245 { | |
| 6246 int nargs; | |
| 6247 Lisp_Object *args; | |
| 6248 }; | |
| 6249 | |
| 6250 static Lisp_Object | |
| 6251 calln_trapping_problems_1 (void *puta) | |
| 6252 { | |
| 6253 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6254 | |
| 6255 return Ffuncall (p->nargs, p->args); | |
| 428 | 6256 } |
| 6257 | |
| 6258 static Lisp_Object | |
| 853 | 6259 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6260 const CIbyte *warning_string, int flags, |
| 853 | 6261 struct call_trapping_problems_result *problem, |
| 6262 int nargs, Lisp_Object *args) | |
| 6263 { | |
| 6264 struct calln_trapping_problems foo; | |
| 6265 struct gcpro gcpro1; | |
| 6266 | |
| 6267 if (SYMBOLP (args[0])) | |
| 6268 { | |
| 6269 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6270 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6271 { | |
| 6272 if (problem) | |
| 6273 { | |
| 6274 problem->caught_error = 0; | |
| 6275 problem->caught_throw = 0; | |
| 6276 problem->error_conditions = Qnil; | |
| 6277 problem->data = Qnil; | |
| 6278 problem->backtrace = Qnil; | |
| 6279 problem->thrown_tag = Qnil; | |
| 6280 problem->thrown_value = Qnil; | |
| 6281 } | |
| 6282 return Qnil; | |
| 6283 } | |
| 6284 } | |
| 6285 | |
| 6286 foo.nargs = nargs; | |
| 6287 foo.args = args; | |
| 6288 | |
| 6289 GCPRO1_ARRAY (args, nargs); | |
| 6290 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6291 flags, problem, | |
| 6292 calln_trapping_problems_1, | |
| 6293 &foo)); | |
| 6294 } | |
| 6295 | |
| 6296 /* #### fix these functions to follow the calling convention of | |
| 6297 call_trapping_problems! */ | |
| 6298 | |
| 6299 Lisp_Object | |
| 867 | 6300 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6301 int flags) |
| 6302 { | |
| 6303 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6304 &function); | |
| 428 | 6305 } |
| 6306 | |
| 6307 Lisp_Object | |
| 867 | 6308 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6309 Lisp_Object object, int flags) |
| 6310 { | |
| 6311 Lisp_Object args[2]; | |
| 6312 | |
| 6313 args[0] = function; | |
| 6314 args[1] = object; | |
| 6315 | |
| 6316 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6317 args); | |
| 6318 } | |
| 6319 | |
| 6320 Lisp_Object | |
| 867 | 6321 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6322 Lisp_Object object1, Lisp_Object object2, |
| 6323 int flags) | |
| 6324 { | |
| 6325 Lisp_Object args[3]; | |
| 6326 | |
| 6327 args[0] = function; | |
| 6328 args[1] = object1; | |
| 6329 args[2] = object2; | |
| 6330 | |
| 6331 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6332 args); | |
| 6333 } | |
| 6334 | |
| 6335 Lisp_Object | |
| 867 | 6336 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6337 Lisp_Object object1, Lisp_Object object2, |
| 6338 Lisp_Object object3, int flags) | |
| 6339 { | |
| 6340 Lisp_Object args[4]; | |
| 6341 | |
| 6342 args[0] = function; | |
| 6343 args[1] = object1; | |
| 6344 args[2] = object2; | |
| 6345 args[3] = object3; | |
| 6346 | |
| 6347 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6348 args); | |
| 6349 } | |
| 6350 | |
| 6351 Lisp_Object | |
| 867 | 6352 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6353 Lisp_Object object1, Lisp_Object object2, |
| 6354 Lisp_Object object3, Lisp_Object object4, | |
| 6355 int flags) | |
| 6356 { | |
| 6357 Lisp_Object args[5]; | |
| 6358 | |
| 6359 args[0] = function; | |
| 6360 args[1] = object1; | |
| 6361 args[2] = object2; | |
| 6362 args[3] = object3; | |
| 6363 args[4] = object4; | |
| 6364 | |
| 6365 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6366 args); | |
| 6367 } | |
| 6368 | |
| 6369 Lisp_Object | |
| 867 | 6370 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6371 Lisp_Object object1, Lisp_Object object2, |
| 6372 Lisp_Object object3, Lisp_Object object4, | |
| 6373 Lisp_Object object5, int flags) | |
| 6374 { | |
| 6375 Lisp_Object args[6]; | |
| 6376 | |
| 6377 args[0] = function; | |
| 6378 args[1] = object1; | |
| 6379 args[2] = object2; | |
| 6380 args[3] = object3; | |
| 6381 args[4] = object4; | |
| 6382 args[5] = object5; | |
| 6383 | |
| 6384 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6385 args); | |
| 6386 } | |
| 6387 | |
| 6388 struct eval_in_buffer_trapping_problems | |
| 6389 { | |
| 6390 struct buffer *buf; | |
| 6391 Lisp_Object form; | |
| 6392 }; | |
| 6393 | |
| 6394 static Lisp_Object | |
| 6395 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6396 { | |
| 6397 struct eval_in_buffer_trapping_problems *p = | |
| 6398 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6399 | |
| 6400 return eval_in_buffer (p->buf, p->form); | |
| 6401 } | |
| 6402 | |
| 6403 /* #### fix these functions to follow the calling convention of | |
| 6404 call_trapping_problems! */ | |
| 6405 | |
| 6406 Lisp_Object | |
| 867 | 6407 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6408 struct buffer *buf, Lisp_Object form, |
| 6409 int flags) | |
| 6410 { | |
| 6411 struct eval_in_buffer_trapping_problems p; | |
| 6412 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6413 struct gcpro gcpro1, gcpro2; |
| 6414 | |
| 853 | 6415 GCPRO2 (buffer, form); |
| 6416 p.buf = buf; | |
| 6417 p.form = form; | |
| 6418 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6419 eval_in_buffer_trapping_problems_1, | |
| 6420 &p)); | |
| 6421 } | |
| 6422 | |
| 6423 Lisp_Object | |
| 1333 | 6424 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6425 Lisp_Object hook_symbol, |
| 6426 int flags) | |
| 6427 { | |
| 1333 | 6428 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6429 RUN_HOOKS_TO_COMPLETION, |
| 6430 flags); | |
| 428 | 6431 } |
| 6432 | |
| 6433 static Lisp_Object | |
| 853 | 6434 safe_run_hook_trapping_problems_1 (void *puta) |
| 6435 { | |
| 5013 | 6436 Lisp_Object hook = GET_LISP_FROM_VOID (puta); |
| 853 | 6437 |
| 6438 run_hook (hook); | |
| 428 | 6439 return Qnil; |
| 6440 } | |
| 6441 | |
| 853 | 6442 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6443 if an error occurs (but not a quit). */ | |
| 6444 | |
| 428 | 6445 Lisp_Object |
| 1333 | 6446 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6447 Lisp_Object hook_symbol, int flags) | |
| 853 | 6448 { |
| 428 | 6449 Lisp_Object tem; |
| 853 | 6450 struct gcpro gcpro1, gcpro2; |
| 6451 struct call_trapping_problems_result prob; | |
| 428 | 6452 |
| 6453 if (!initialized || preparing_for_armageddon) | |
| 6454 return Qnil; | |
| 6455 tem = find_symbol_value (hook_symbol); | |
| 6456 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6457 return Qnil; | |
| 6458 | |
| 853 | 6459 GCPRO2 (hook_symbol, tem); |
| 1333 | 6460 tem = call_trapping_problems (Qerror, NULL, |
| 6461 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6462 &prob, |
| 6463 safe_run_hook_trapping_problems_1, | |
| 5013 | 6464 STORE_LISP_IN_VOID (hook_symbol)); |
| 1333 | 6465 { |
| 6466 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6467 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6468 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6469 | |
| 6470 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6471 Qquit))) | |
| 6472 { | |
| 6473 Fset (hook_symbol, Qnil); | |
| 6474 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6475 } | |
| 6476 else | |
| 6477 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6478 | |
| 6479 | |
| 6480 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6481 &prob); | |
| 6482 } | |
| 6483 | |
| 6484 UNGCPRO; | |
| 6485 return tem; | |
| 853 | 6486 } |
| 6487 | |
| 6488 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6489 { | |
| 6490 struct buffer *buf; | |
| 6491 int nargs; | |
| 6492 Lisp_Object *args; | |
| 6493 enum run_hooks_condition cond; | |
| 6494 }; | |
| 6495 | |
| 6496 static Lisp_Object | |
| 6497 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6498 { | |
| 6499 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6500 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6501 | |
| 6502 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6503 porra->cond); | |
| 6504 } | |
| 6505 | |
| 6506 /* #### fix these functions to follow the calling convention of | |
| 6507 call_trapping_problems! */ | |
| 428 | 6508 |
| 6509 Lisp_Object | |
| 1333 | 6510 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6511 struct buffer *buf, int nargs, |
| 6512 Lisp_Object *args, | |
| 6513 enum run_hooks_condition cond, | |
| 6514 int flags) | |
| 6515 { | |
| 6516 Lisp_Object sym, val, ret; | |
| 6517 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6518 struct gcpro gcpro1; |
| 1333 | 6519 Lisp_Object hook_name; |
| 6520 Ibyte *hook_str; | |
| 6521 Ibyte *err; | |
| 428 | 6522 |
| 6523 if (!initialized || preparing_for_armageddon) | |
| 853 | 6524 /* We need to bail out of here pronto. */ |
| 428 | 6525 return Qnil; |
| 6526 | |
| 853 | 6527 GCPRO1_ARRAY (args, nargs); |
| 6528 | |
| 6529 sym = args[0]; | |
| 6530 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6531 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6532 | |
| 6533 if (UNBOUNDP (val) || NILP (val)) | |
| 6534 RETURN_UNGCPRO (ret); | |
| 6535 | |
| 6536 diversity_and_distrust.buf = buf; | |
| 6537 diversity_and_distrust.nargs = nargs; | |
| 6538 diversity_and_distrust.args = args; | |
| 6539 diversity_and_distrust.cond = cond; | |
| 6540 | |
| 1333 | 6541 hook_name = XSYMBOL_NAME (args[0]); |
| 6542 hook_str = XSTRING_DATA (hook_name); | |
| 6543 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6544 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6545 RETURN_UNGCPRO |
| 6546 (call_trapping_problems | |
| 1333 | 6547 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6548 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6549 &diversity_and_distrust)); | |
| 428 | 6550 } |
| 6551 | |
| 6552 Lisp_Object | |
| 1333 | 6553 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6554 int nargs, |
| 6555 Lisp_Object *args, | |
| 6556 enum run_hooks_condition cond, | |
| 6557 int flags) | |
| 6558 { | |
| 6559 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6560 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6561 } |
| 6562 | |
| 6563 Lisp_Object | |
| 1333 | 6564 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6565 Lisp_Object hook_var, |
| 6566 int nargs, ...) | |
| 6567 { | |
| 6568 /* This function can GC */ | |
| 6569 struct gcpro gcpro1; | |
| 6570 int i; | |
| 6571 va_list vargs; | |
| 6572 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6573 int flags; | |
| 6574 | |
| 6575 va_start (vargs, nargs); | |
| 6576 funcall_args[0] = hook_var; | |
| 6577 for (i = 0; i < nargs; i++) | |
| 6578 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6579 flags = va_arg (vargs, int); | |
| 6580 va_end (vargs); | |
| 6581 | |
| 6582 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6583 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6584 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6585 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6586 } |
| 6587 | |
| 6588 Lisp_Object | |
| 1333 | 6589 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6590 struct buffer *buf, |
| 6591 Lisp_Object hook_var, | |
| 6592 int nargs, ...) | |
| 6593 { | |
| 6594 /* This function can GC */ | |
| 6595 struct gcpro gcpro1; | |
| 6596 int i; | |
| 6597 va_list vargs; | |
| 6598 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6599 int flags; | |
| 6600 | |
| 6601 va_start (vargs, nargs); | |
| 6602 funcall_args[0] = hook_var; | |
| 6603 for (i = 0; i < nargs; i++) | |
| 6604 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6605 flags = va_arg (vargs, int); | |
| 6606 va_end (vargs); | |
| 6607 | |
| 6608 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6609 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6610 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6611 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6612 } |
| 6613 | |
| 6614 | |
| 6615 /************************************************************************/ | |
| 6616 /* The special binding stack */ | |
| 771 | 6617 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6618 /* When performance is critical, use the macros in backtrace.h. */ |
| 6619 /************************************************************************/ | |
| 6620 | |
| 6621 #define min_max_specpdl_size 400 | |
| 6622 | |
| 6623 void | |
| 647 | 6624 grow_specpdl (EMACS_INT reserved) |
| 6625 { | |
| 6626 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6627 if (size_needed >= max_specpdl_size) |
| 6628 { | |
| 6629 if (max_specpdl_size < min_max_specpdl_size) | |
| 6630 max_specpdl_size = min_max_specpdl_size; | |
| 6631 if (size_needed >= max_specpdl_size) | |
| 6632 { | |
| 1951 | 6633 /* Leave room for some specpdl in the debugger. */ |
| 6634 max_specpdl_size = size_needed + 100; | |
| 6635 if (max_specpdl_size > specpdl_size) | |
| 6636 { | |
| 6637 specpdl_size = max_specpdl_size; | |
| 6638 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6639 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6640 } | |
| 563 | 6641 signal_continuable_error |
| 6642 (Qstack_overflow, | |
| 6643 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6644 } |
| 6645 } | |
| 6646 while (specpdl_size < size_needed) | |
| 6647 { | |
| 6648 specpdl_size *= 2; | |
| 6649 if (specpdl_size > max_specpdl_size) | |
| 6650 specpdl_size = max_specpdl_size; | |
| 6651 } | |
| 6652 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6653 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6654 check_specbind_stack_sanity (); |
| 428 | 6655 } |
| 6656 | |
| 6657 | |
| 6658 /* Handle unbinding buffer-local variables */ | |
| 6659 static Lisp_Object | |
| 6660 specbind_unwind_local (Lisp_Object ovalue) | |
| 6661 { | |
| 6662 Lisp_Object current = Fcurrent_buffer (); | |
| 6663 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6664 Lisp_Object victim = ovalue; |
| 6665 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6666 ovalue = XCDR (victim); | |
| 428 | 6667 |
| 6668 free_cons (victim); | |
| 6669 | |
| 6670 if (NILP (buf)) | |
| 6671 { | |
| 6672 /* Deleted buffer -- do nothing */ | |
| 6673 } | |
| 6674 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6675 { | |
| 6676 /* Was buffer-local when binding was made, now no longer is. | |
| 6677 * (kill-local-variable can do this.) | |
| 6678 * Do nothing in this case. | |
| 6679 */ | |
| 6680 } | |
| 6681 else if (EQ (buf, current)) | |
| 6682 Fset (symbol, ovalue); | |
| 6683 else | |
| 6684 { | |
| 6685 /* Urk! Somebody switched buffers */ | |
| 6686 struct gcpro gcpro1; | |
| 6687 GCPRO1 (current); | |
| 6688 Fset_buffer (buf); | |
| 6689 Fset (symbol, ovalue); | |
| 6690 Fset_buffer (current); | |
| 6691 UNGCPRO; | |
| 6692 } | |
| 6693 return symbol; | |
| 6694 } | |
| 6695 | |
| 6696 static Lisp_Object | |
| 6697 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6698 { | |
| 6699 Lisp_Object current = Fcurrent_buffer (); | |
| 6700 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6701 | |
| 6702 buffer = get_buffer (buffer, 0); | |
| 6703 if (NILP (buffer)) | |
| 6704 { | |
| 6705 /* Deleted buffer -- do nothing */ | |
| 6706 } | |
| 6707 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6708 { | |
| 6709 /* Was buffer-local when binding was made, now no longer is. | |
| 6710 * (kill-local-variable can do this.) | |
| 6711 * Do nothing in this case. | |
| 6712 */ | |
| 6713 } | |
| 6714 else if (EQ (buffer, current)) | |
| 6715 Fkill_local_variable (symbol); | |
| 6716 else | |
| 6717 { | |
| 6718 /* Urk! Somebody switched buffers */ | |
| 6719 struct gcpro gcpro1; | |
| 6720 GCPRO1 (current); | |
| 6721 Fset_buffer (buffer); | |
| 6722 Fkill_local_variable (symbol); | |
| 6723 Fset_buffer (current); | |
| 6724 UNGCPRO; | |
| 6725 } | |
| 6726 return symbol; | |
| 6727 } | |
| 6728 | |
| 6729 | |
| 6730 void | |
| 6731 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6732 { | |
| 6733 SPECBIND (symbol, value); | |
| 853 | 6734 |
| 6735 check_specbind_stack_sanity (); | |
| 428 | 6736 } |
| 6737 | |
| 6738 void | |
| 6739 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6740 { | |
| 6741 int buffer_local = | |
| 6742 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6743 | |
| 6744 if (buffer_local == 0) | |
| 6745 { | |
| 6746 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6747 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6748 } |
| 6749 else if (buffer_local > 0) | |
| 6750 { | |
| 6751 /* Already buffer-local */ | |
| 6752 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6753 find_symbol_value (symbol)); | |
| 6754 specpdl_ptr->func = specbind_unwind_local; | |
| 6755 } | |
| 6756 else | |
| 6757 { | |
| 6758 /* About to become buffer-local */ | |
| 6759 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6760 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6761 } | |
| 6762 | |
| 6763 specpdl_ptr->symbol = symbol; | |
| 6764 specpdl_ptr++; | |
| 6765 specpdl_depth_counter++; | |
| 6766 | |
| 6767 Fset (symbol, value); | |
| 853 | 6768 |
| 6769 check_specbind_stack_sanity (); | |
| 428 | 6770 } |
| 6771 | |
| 771 | 6772 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6773 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6774 before your function returns normally, passing in the integer returned | |
| 6775 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6776 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6777 ignored. #### We should eliminate it entirely. */ | |
| 6778 | |
| 6779 int | |
| 428 | 6780 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6781 Lisp_Object arg) | |
| 6782 { | |
| 6783 SPECPDL_RESERVE (1); | |
| 6784 specpdl_ptr->func = function; | |
| 6785 specpdl_ptr->symbol = Qnil; | |
| 6786 specpdl_ptr->old_value = arg; | |
| 6787 specpdl_ptr++; | |
| 6788 specpdl_depth_counter++; | |
| 853 | 6789 check_specbind_stack_sanity (); |
| 771 | 6790 return specpdl_depth_counter - 1; |
| 6791 } | |
| 6792 | |
| 6793 static Lisp_Object | |
| 802 | 6794 restore_lisp_object (Lisp_Object cons) |
| 6795 { | |
| 5013 | 6796 Lisp_Object laddr = XCAR (cons); |
| 6797 Lisp_Object *addr = (Lisp_Object *) GET_VOID_FROM_LISP (laddr); | |
| 802 | 6798 *addr = XCDR (cons); |
| 853 | 6799 free_cons (cons); |
| 802 | 6800 return Qnil; |
| 6801 } | |
| 6802 | |
| 6803 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6804 by ADDR with the value VAL. */ | |
| 814 | 6805 static int |
| 802 | 6806 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6807 Lisp_Object val) | |
| 6808 { | |
| 5013 | 6809 /* We use a cons rather than a malloc()ed structure because we want the |
| 6810 Lisp object to have garbage-collection protection */ | |
| 6811 Lisp_Object laddr = STORE_VOID_IN_LISP (addr); | |
| 802 | 6812 return record_unwind_protect (restore_lisp_object, |
| 5013 | 6813 noseeum_cons (laddr, val)); |
| 802 | 6814 } |
| 6815 | |
| 6816 /* Similar to specbind() but for any C variable whose value is a | |
| 6817 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6818 pointed to by ADDR to its existing value, and then changes its | |
| 6819 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6820 pass this to unbind_to() after you are done. */ | |
| 6821 int | |
| 6822 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6823 { | |
| 6824 int count = specpdl_depth (); | |
| 6825 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6826 *addr = newval; | |
| 6827 return count; | |
| 6828 } | |
| 6829 | |
| 5013 | 6830 struct restore_int |
| 6831 { | |
| 6832 int *addr; | |
| 802 | 6833 int val; |
| 5013 | 6834 }; |
| 6835 | |
| 6836 static Lisp_Object | |
| 6837 restore_int (Lisp_Object obj) | |
| 6838 { | |
| 6839 struct restore_int *ri = (struct restore_int *) GET_VOID_FROM_LISP (obj); | |
| 6840 *(ri->addr) = ri->val; | |
| 6841 xfree (ri); | |
| 802 | 6842 return Qnil; |
| 6843 } | |
| 6844 | |
| 6845 /* Establish an unwind-protect which will restore the int pointed to | |
| 6846 by ADDR with the value VAL. This function works correctly with | |
| 6847 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6848 int |
| 802 | 6849 record_unwind_protect_restoring_int (int *addr, int val) |
| 6850 { | |
| 5013 | 6851 struct restore_int *ri = xnew (struct restore_int); |
| 6852 ri->addr = addr; | |
| 6853 ri->val = val; | |
| 6854 return record_unwind_protect (restore_int, STORE_VOID_IN_LISP (ri)); | |
| 802 | 6855 } |
| 6856 | |
| 6857 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6858 Sets up an unwind-protect to restore the variable pointed to by | |
| 6859 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6860 Returns the previous value of specpdl_depth(); pass this to | |
| 6861 unbind_to() after you are done. This function works correctly with | |
| 6862 all ints, even those that don't fit into a Lisp integer. */ | |
| 6863 int | |
| 6864 internal_bind_int (int *addr, int newval) | |
| 6865 { | |
| 6866 int count = specpdl_depth (); | |
| 6867 record_unwind_protect_restoring_int (addr, *addr); | |
| 6868 *addr = newval; | |
| 6869 return count; | |
| 6870 } | |
| 6871 | |
| 6872 static Lisp_Object | |
| 771 | 6873 free_pointer (Lisp_Object opaque) |
| 6874 { | |
| 5013 | 6875 void *ptr = GET_VOID_FROM_LISP (opaque); |
| 6876 xfree (ptr); | |
| 771 | 6877 return Qnil; |
| 6878 } | |
| 6879 | |
| 6880 /* Establish an unwind-protect which will free the specified block. | |
| 6881 */ | |
| 6882 int | |
| 6883 record_unwind_protect_freeing (void *ptr) | |
| 6884 { | |
| 5013 | 6885 return record_unwind_protect (free_pointer, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6886 } |
| 6887 | |
| 6888 static Lisp_Object | |
| 6889 free_dynarr (Lisp_Object opaque) | |
| 6890 { | |
| 5013 | 6891 Dynarr_free (GET_VOID_FROM_LISP (opaque)); |
| 771 | 6892 return Qnil; |
| 6893 } | |
| 6894 | |
| 6895 int | |
| 6896 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6897 { | |
| 5013 | 6898 return record_unwind_protect (free_dynarr, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6899 } |
| 428 | 6900 |
| 6901 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6902 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6903 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6904 Lisp_Object |
| 771 | 6905 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6906 { |
| 6907 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6908 check_specbind_stack_sanity (); |
| 428 | 6909 return value; |
| 6910 } | |
| 6911 | |
| 6912 /* Don't call this directly. | |
| 6913 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6914 void | |
| 6915 unbind_to_hairy (int count) | |
| 6916 { | |
| 442 | 6917 ++specpdl_ptr; |
| 6918 ++specpdl_depth_counter; | |
| 6919 | |
| 428 | 6920 while (specpdl_depth_counter != count) |
| 6921 { | |
| 1313 | 6922 Lisp_Object oquit = Qunbound; |
| 6923 | |
| 6924 /* Do this check BEFORE decrementing the values below, because once | |
| 6925 they're decremented, GC protection is lost on | |
| 6926 specpdl_ptr->old_value. */ | |
| 1322 | 6927 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6928 { |
| 6929 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6930 existing QUIT until afterwards. Only do this, however, for | |
| 6931 unwind-protects established by Lisp code, not by C code | |
| 6932 (e.g. free_opaque_ptr() or something), because the act of | |
| 6933 checking for QUIT can cause all sorts of weird things to | |
| 6934 happen, since it churns the event loop -- redisplay, running | |
| 6935 Lisp, etc. Code should not have to worry about this just | |
| 6936 because of establishing an unwind-protect. */ | |
| 6937 check_quit (); /* make Vquit_flag accurate */ | |
| 6938 oquit = Vquit_flag; | |
| 6939 Vquit_flag = Qnil; | |
| 6940 } | |
| 6941 | |
| 428 | 6942 --specpdl_ptr; |
| 6943 --specpdl_depth_counter; | |
| 6944 | |
| 1313 | 6945 /* #### At this point, there is no GC protection on old_value. This |
| 6946 could be a real problem, depending on what unwind-protect function | |
| 6947 is called. It looks like it just so happens that the ones | |
| 6948 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6949 we should look into fixing this. (Many unwind-protect functions | |
| 6950 free values. Is it a problem if freed values are | |
| 6951 GC-protected?) */ | |
| 428 | 6952 if (specpdl_ptr->func != 0) |
| 1313 | 6953 { |
| 6954 /* An unwind-protect */ | |
| 6955 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6956 } | |
| 6957 | |
| 428 | 6958 else |
| 6959 { | |
| 6960 /* We checked symbol for validity when we specbound it, | |
| 6961 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6962 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6963 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6964 sym->value = specpdl_ptr->old_value; | |
| 6965 else | |
| 6966 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6967 } | |
| 6968 | |
| 6969 #if 0 /* martin */ | |
| 6970 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6971 /* There should never be anything here for us to remove. | |
| 6972 If so, it indicates a logic error in Emacs. Catches | |
| 6973 should get removed when a throw or signal occurs, or | |
| 6974 when a catch or condition-case exits normally. But | |
| 6975 it's too dangerous to just remove this code. --ben */ | |
| 6976 | |
| 6977 /* Furthermore, this code is not in FSFmacs!!! | |
| 6978 Braino on mly's part? */ | |
| 6979 /* If we're unwound past the pdlcount of a catch frame, | |
| 6980 that catch can't possibly still be valid. */ | |
| 6981 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6982 { | |
| 6983 catchlist = catchlist->next; | |
| 6984 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6985 } | |
| 6986 #endif | |
| 6987 #endif | |
| 1313 | 6988 |
| 6989 if (!UNBOUNDP (oquit)) | |
| 6990 Vquit_flag = oquit; | |
| 428 | 6991 } |
| 853 | 6992 check_specbind_stack_sanity (); |
| 428 | 6993 } |
| 6994 | |
| 6995 | |
| 6996 | |
| 6997 /* Get the value of symbol's global binding, even if that binding is | |
| 6998 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6999 | |
| 7000 Lisp_Object | |
| 7001 top_level_value (Lisp_Object symbol) | |
| 7002 { | |
| 7003 REGISTER struct specbinding *ptr = specpdl; | |
| 7004 | |
| 7005 CHECK_SYMBOL (symbol); | |
| 7006 for (; ptr != specpdl_ptr; ptr++) | |
| 7007 { | |
| 7008 if (EQ (ptr->symbol, symbol)) | |
| 7009 return ptr->old_value; | |
| 7010 } | |
| 7011 return XSYMBOL (symbol)->value; | |
| 7012 } | |
| 7013 | |
| 7014 #if 0 | |
| 7015 | |
| 7016 Lisp_Object | |
| 7017 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 7018 { | |
| 7019 REGISTER struct specbinding *ptr = specpdl; | |
| 7020 | |
| 7021 CHECK_SYMBOL (symbol); | |
| 7022 for (; ptr != specpdl_ptr; ptr++) | |
| 7023 { | |
| 7024 if (EQ (ptr->symbol, symbol)) | |
| 7025 { | |
| 7026 ptr->old_value = newval; | |
| 7027 return newval; | |
| 7028 } | |
| 7029 } | |
| 7030 return Fset (symbol, newval); | |
| 7031 } | |
| 7032 | |
| 7033 #endif /* 0 */ | |
| 7034 | |
| 7035 | |
| 7036 /************************************************************************/ | |
| 7037 /* Backtraces */ | |
| 7038 /************************************************************************/ | |
| 7039 | |
| 7040 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 7041 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 7042 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 7043 */ | |
| 7044 (level, flag)) | |
| 7045 { | |
| 7046 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7047 REGISTER int i; | |
| 7048 | |
| 7049 CHECK_INT (level); | |
| 7050 | |
| 7051 for (i = 0; backlist && i < XINT (level); i++) | |
| 7052 { | |
| 7053 backlist = backlist->next; | |
| 7054 } | |
| 7055 | |
| 7056 if (backlist) | |
| 7057 backlist->debug_on_exit = !NILP (flag); | |
| 7058 | |
| 7059 return flag; | |
| 7060 } | |
| 7061 | |
| 7062 static void | |
| 7063 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 7064 { | |
| 7065 int printing_bindings = 0; | |
| 7066 | |
| 7067 for (; speccount > speclimit; speccount--) | |
| 7068 { | |
| 7069 if (specpdl[speccount - 1].func == 0 | |
| 7070 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 7071 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 7072 { | |
|
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19a72041c5ed
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Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7073 write_ascstring (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 7074 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 7075 printing_bindings = 1; | |
| 7076 } | |
| 7077 else | |
| 7078 { | |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7079 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
|
7080 write_ascstring (stream, " # (unwind-protect ...)\n"); |
| 428 | 7081 printing_bindings = 0; |
| 7082 } | |
| 7083 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7084 if (printing_bindings) write_ascstring (stream, ")\n"); |
| 428 | 7085 } |
| 7086 | |
| 1292 | 7087 static Lisp_Object |
| 7088 backtrace_unevalled_args (Lisp_Object *args) | |
| 7089 { | |
| 7090 if (args) | |
| 7091 return *args; | |
| 7092 else | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7093 return list1 (build_ascstring ("[internal]")); |
| 1292 | 7094 } |
| 7095 | |
| 428 | 7096 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 7097 Print a trace of Lisp function calls currently active. | |
| 438 | 7098 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 7099 and defaults to the value of `standard-output'. |
| 7100 Optional second arg DETAILED non-nil means show places where currently | |
| 7101 active variable bindings, catches, condition-cases, and | |
| 7102 unwind-protects, as well as function calls, were made. | |
| 428 | 7103 */ |
| 7104 (stream, detailed)) | |
| 7105 { | |
| 7106 /* This function can GC */ | |
| 7107 struct backtrace *backlist = backtrace_list; | |
| 7108 struct catchtag *catches = catchlist; | |
| 7109 int speccount = specpdl_depth(); | |
| 7110 | |
| 7111 int old_nl = print_escape_newlines; | |
| 7112 int old_pr = print_readably; | |
| 7113 Lisp_Object old_level = Vprint_level; | |
| 7114 Lisp_Object oiq = Vinhibit_quit; | |
| 7115 struct gcpro gcpro1, gcpro2; | |
| 7116 | |
| 7117 /* We can't allow quits in here because that could cause the values | |
| 7118 of print_readably and print_escape_newlines to get screwed up. | |
| 7119 Normally we would use a record_unwind_protect but that would | |
| 7120 screw up the functioning of this function. */ | |
| 7121 Vinhibit_quit = Qt; | |
| 7122 | |
| 7123 entering_debugger = 0; | |
| 7124 | |
| 872 | 7125 if (!NILP (detailed)) |
| 7126 Vprint_level = make_int (50); | |
| 7127 else | |
| 7128 Vprint_level = make_int (3); | |
| 428 | 7129 print_readably = 0; |
| 7130 print_escape_newlines = 1; | |
| 7131 | |
| 7132 GCPRO2 (stream, old_level); | |
| 7133 | |
| 1261 | 7134 stream = canonicalize_printcharfun (stream); |
| 428 | 7135 |
| 7136 for (;;) | |
| 7137 { | |
| 7138 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7139 { | |
| 7140 int catchpdl = catches->pdlcount; | |
| 438 | 7141 if (speccount > catchpdl |
| 7142 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7143 /* This is a condition-case catchpoint */ |
| 7144 catchpdl = catchpdl + 1; | |
| 7145 | |
| 7146 backtrace_specials (speccount, catchpdl, stream); | |
| 7147 | |
| 7148 speccount = catches->pdlcount; | |
| 7149 if (catchpdl == speccount) | |
| 7150 { | |
|
4952
19a72041c5ed
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parents:
4846
diff
changeset
|
7151 write_ascstring (stream, " # (catch "); |
| 428 | 7152 Fprin1 (catches->tag, stream); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7153 write_ascstring (stream, " ...)\n"); |
| 428 | 7154 } |
| 7155 else | |
| 7156 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7157 write_ascstring (stream, " # (condition-case ... . "); |
| 428 | 7158 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
|
7159 write_ascstring (stream, ")\n"); |
| 428 | 7160 } |
| 7161 catches = catches->next; | |
| 7162 } | |
| 7163 else if (!backlist) | |
| 7164 break; | |
| 7165 else | |
| 7166 { | |
| 7167 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7168 { | |
| 7169 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7170 speccount = backlist->pdlcount; | |
| 7171 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7172 write_ascstring (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7173 if (backlist->nargs == UNEVALLED) |
| 7174 { | |
| 1292 | 7175 Fprin1 (Fcons (*backlist->function, |
| 7176 backtrace_unevalled_args (backlist->args)), | |
| 7177 stream); | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7178 write_ascstring (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7179 } |
| 7180 else | |
| 7181 { | |
| 7182 Lisp_Object tem = *backlist->function; | |
| 7183 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
|
7184 write_ascstring (stream, "("); |
| 428 | 7185 if (backlist->nargs == MANY) |
| 7186 { | |
| 7187 int i; | |
| 7188 Lisp_Object tail = Qnil; | |
| 7189 struct gcpro ngcpro1; | |
| 7190 | |
| 7191 NGCPRO1 (tail); | |
| 7192 for (tail = *backlist->args, i = 0; | |
| 7193 !NILP (tail); | |
| 7194 tail = Fcdr (tail), i++) | |
| 7195 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7196 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7197 Fprin1 (Fcar (tail), stream); |
| 7198 } | |
| 7199 NUNGCPRO; | |
| 7200 } | |
| 7201 else | |
| 7202 { | |
| 7203 int i; | |
| 7204 for (i = 0; i < backlist->nargs; i++) | |
| 7205 { | |
| 826 | 7206 if (!i && EQ (tem, Qbyte_code)) |
| 7207 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7208 write_ascstring (stream, "\"...\""); |
| 826 | 7209 continue; |
| 7210 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7211 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7212 Fprin1 (backlist->args[i], stream); |
| 7213 } | |
| 7214 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7215 write_ascstring (stream, ")\n"); |
| 428 | 7216 } |
| 7217 backlist = backlist->next; | |
| 7218 } | |
| 7219 } | |
| 7220 Vprint_level = old_level; | |
| 7221 print_readably = old_pr; | |
| 7222 print_escape_newlines = old_nl; | |
| 7223 UNGCPRO; | |
| 7224 Vinhibit_quit = oiq; | |
| 7225 return Qnil; | |
| 7226 } | |
| 7227 | |
| 7228 | |
| 444 | 7229 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7230 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
|
7231 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
|
7232 operator), the value is (nil FUNCTION ARG-FORMS...). |
| 428 | 7233 If that frame has evaluated its arguments and called its function already, |
| 7234 the value is (t FUNCTION ARG-VALUES...). | |
| 7235 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7236 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7237 or a lambda expression for macro calls. | |
| 444 | 7238 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7239 */ |
| 7240 (nframes)) | |
| 7241 { | |
| 7242 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7243 REGISTER int i; | |
| 7244 Lisp_Object tem; | |
| 7245 | |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
7246 check_integer_range (nframes, Qzero, make_integer (EMACS_INT_MAX)); |
| 428 | 7247 |
| 7248 /* Find the frame requested. */ | |
| 7249 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7250 backlist = backlist->next; | |
| 7251 | |
| 7252 if (!backlist) | |
| 7253 return Qnil; | |
| 7254 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7255 return Fcons (Qnil, Fcons (*backlist->function, |
| 7256 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7257 else |
| 7258 { | |
| 7259 if (backlist->nargs == MANY) | |
| 7260 tem = *backlist->args; | |
| 7261 else | |
| 7262 tem = Flist (backlist->nargs, backlist->args); | |
| 7263 | |
| 7264 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7265 } | |
| 7266 } | |
| 7267 | |
| 7268 | |
| 7269 /************************************************************************/ | |
| 7270 /* Warnings */ | |
| 7271 /************************************************************************/ | |
| 7272 | |
| 1123 | 7273 static int |
| 7274 warning_will_be_discarded (Lisp_Object level) | |
| 7275 { | |
| 7276 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7277 to avoid excessive consing. */ | |
| 7278 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7279 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7280 } | |
| 7281 | |
| 428 | 7282 void |
| 1204 | 7283 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7284 Lisp_Object obj) |
| 7285 { | |
| 1123 | 7286 if (warning_will_be_discarded (level)) |
| 793 | 7287 return; |
| 1123 | 7288 |
| 1204 | 7289 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7290 if (NILP (Vpending_warnings)) |
| 7291 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7292 else | |
| 7293 { | |
| 7294 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7295 Vpending_warnings_tail = obj; | |
| 7296 } | |
| 7297 } | |
| 7298 | |
| 7299 /* #### This should probably accept Lisp objects; but then we have | |
| 7300 to make sure that Feval() isn't called, since it might not be safe. | |
| 7301 | |
| 7302 An alternative approach is to just pass some non-string type of | |
| 7303 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7304 automatically be called when it is safe to do so. */ | |
| 7305 | |
| 7306 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7307 warn_when_safe (Lisp_Object class_, Lisp_Object level, const Ascbyte *fmt, ...) |
| 428 | 7308 { |
| 7309 Lisp_Object obj; | |
| 7310 va_list args; | |
| 7311 | |
| 1123 | 7312 if (warning_will_be_discarded (level)) |
| 793 | 7313 return; |
| 1123 | 7314 |
| 428 | 7315 va_start (args, fmt); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7316 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 7317 va_end (args); |
| 7318 | |
| 1204 | 7319 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7320 } |
| 7321 | |
| 7322 | |
| 7323 | |
| 7324 | |
| 7325 /************************************************************************/ | |
| 7326 /* Initialization */ | |
| 7327 /************************************************************************/ | |
| 7328 | |
| 7329 void | |
| 7330 syms_of_eval (void) | |
| 7331 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
7332 INIT_LISP_OBJECT (subr); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
7333 INIT_LISP_OBJECT (multiple_value); |
| 442 | 7334 |
| 563 | 7335 DEFSYMBOL (Qinhibit_quit); |
| 7336 DEFSYMBOL (Qautoload); | |
| 7337 DEFSYMBOL (Qdebug_on_error); | |
| 7338 DEFSYMBOL (Qstack_trace_on_error); | |
| 7339 DEFSYMBOL (Qdebug_on_signal); | |
| 7340 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7341 DEFSYMBOL (Qdebugger); | |
| 7342 DEFSYMBOL (Qmacro); | |
| 428 | 7343 defsymbol (&Qand_rest, "&rest"); |
| 7344 defsymbol (&Qand_optional, "&optional"); | |
| 7345 /* Note that the process code also uses Qexit */ | |
| 563 | 7346 DEFSYMBOL (Qexit); |
|
5506
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7347 DEFSYMBOL (Qdeclare); |
| 563 | 7348 DEFSYMBOL (Qsetq); |
| 7349 DEFSYMBOL (Qinteractive); | |
| 7350 DEFSYMBOL (Qcommandp); | |
| 7351 DEFSYMBOL (Qdefun); | |
| 7352 DEFSYMBOL (Qprogn); | |
| 7353 DEFSYMBOL (Qvalues); | |
| 7354 DEFSYMBOL (Qdisplay_warning); | |
| 7355 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7356 DEFSYMBOL (Qfinalize_list); |
| 563 | 7357 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7358 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7359 DEFSYMBOL (Qobsolete_throw); |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
7360 DEFSYMBOL (Qmultiple_value_list_internal); |
| 428 | 7361 |
| 7362 DEFSUBR (For); | |
| 7363 DEFSUBR (Fand); | |
| 7364 DEFSUBR (Fif); | |
| 7365 DEFSUBR_MACRO (Fwhen); | |
| 7366 DEFSUBR_MACRO (Funless); | |
| 7367 DEFSUBR (Fcond); | |
| 7368 DEFSUBR (Fprogn); | |
| 7369 DEFSUBR (Fprog1); | |
| 7370 DEFSUBR (Fprog2); | |
| 7371 DEFSUBR (Fsetq); | |
| 7372 DEFSUBR (Fquote); | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
7373 DEFSUBR (Fquote_maybe); |
| 428 | 7374 DEFSUBR (Ffunction); |
| 7375 DEFSUBR (Fdefun); | |
| 7376 DEFSUBR (Fdefmacro); | |
| 7377 DEFSUBR (Fdefvar); | |
| 7378 DEFSUBR (Fdefconst); | |
| 7379 DEFSUBR (Flet); | |
| 7380 DEFSUBR (FletX); | |
| 7381 DEFSUBR (Fwhile); | |
| 7382 DEFSUBR (Fmacroexpand_internal); | |
| 7383 DEFSUBR (Fcatch); | |
| 7384 DEFSUBR (Fthrow); | |
| 7385 DEFSUBR (Funwind_protect); | |
| 7386 DEFSUBR (Fcondition_case); | |
| 7387 DEFSUBR (Fcall_with_condition_handler); | |
| 7388 DEFSUBR (Fsignal); | |
| 7389 DEFSUBR (Finteractive_p); | |
| 7390 DEFSUBR (Fcommandp); | |
| 7391 DEFSUBR (Fcommand_execute); | |
| 7392 DEFSUBR (Fautoload); | |
| 7393 DEFSUBR (Feval); | |
| 7394 DEFSUBR (Fapply); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7395 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7396 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7397 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7398 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7399 DEFSUBR (Fvalues_list); |
| 428 | 7400 DEFSUBR (Ffuncall); |
| 7401 DEFSUBR (Ffunctionp); | |
| 7402 DEFSUBR (Ffunction_min_args); | |
| 7403 DEFSUBR (Ffunction_max_args); | |
| 7404 DEFSUBR (Frun_hooks); | |
| 7405 DEFSUBR (Frun_hook_with_args); | |
| 7406 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7407 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7408 DEFSUBR (Fbacktrace_debug); | |
| 7409 DEFSUBR (Fbacktrace); | |
| 7410 DEFSUBR (Fbacktrace_frame); | |
| 7411 } | |
| 7412 | |
| 7413 void | |
| 814 | 7414 init_eval_semi_early (void) |
| 428 | 7415 { |
| 7416 specpdl_ptr = specpdl; | |
| 7417 specpdl_depth_counter = 0; | |
| 7418 catchlist = 0; | |
| 7419 Vcondition_handlers = Qnil; | |
| 7420 backtrace_list = 0; | |
| 7421 Vquit_flag = Qnil; | |
| 7422 debug_on_next_call = 0; | |
| 7423 lisp_eval_depth = 0; | |
| 7424 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7425 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7426 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7427 multiple_value_current_limit = 1; |
| 428 | 7428 } |
| 7429 | |
| 7430 void | |
| 7431 reinit_vars_of_eval (void) | |
| 7432 { | |
| 7433 preparing_for_armageddon = 0; | |
| 7434 in_warnings = 0; | |
| 7435 specpdl_size = 50; | |
| 7436 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7437 /* XEmacs change: increase these values. */ | |
| 7438 max_specpdl_size = 3000; | |
| 442 | 7439 max_lisp_eval_depth = 1000; |
| 7440 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7441 throw_level = 0; |
| 7442 #endif | |
| 2367 | 7443 init_eval_semi_early (); |
| 428 | 7444 } |
| 7445 | |
| 7446 void | |
| 7447 vars_of_eval (void) | |
| 7448 { | |
| 7449 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7450 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7451 */ ); | |
| 7452 | |
| 7453 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7454 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7455 This limit is to catch infinite recursions for you before they cause | |
| 7456 actual stack overflow in C, which would be fatal for Emacs. | |
| 7457 You can safely make it considerably larger than its default value, | |
| 7458 if that proves inconveniently small. | |
| 7459 */ ); | |
| 7460 | |
| 7461 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7462 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7463 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7464 Normally, you do not need to set this value yourself. It is set to | |
| 7465 t each time a Control-G is detected, and to `critical' each time a | |
| 7466 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7467 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7468 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7469 it's correct to do so. |
| 428 | 7470 */ ); |
| 7471 Vquit_flag = Qnil; | |
| 7472 | |
| 7473 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7474 Non-nil inhibits C-g quitting from happening immediately. | |
| 7475 Note that `quit-flag' will still be set by typing C-g, | |
| 7476 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7477 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7478 before making `inhibit-quit' nil. |
| 7479 | |
| 7480 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7481 requested by typing control-shift-G in a window-system frame; | |
| 7482 this is explained in more detail in `quit-flag'. | |
| 428 | 7483 */ ); |
| 7484 Vinhibit_quit = Qnil; | |
| 7485 | |
| 7486 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7487 *Non-nil means automatically display a backtrace buffer | |
| 7488 after any error that is not handled by a `condition-case'. | |
| 7489 If the value is a list, an error only means to display a backtrace | |
| 7490 if one of its condition symbols appears in the list. | |
| 7491 See also variable `stack-trace-on-signal'. | |
| 7492 */ ); | |
| 7493 Vstack_trace_on_error = Qnil; | |
| 7494 | |
| 7495 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7496 *Non-nil means automatically display a backtrace buffer | |
| 7497 after any error that is signalled, whether or not it is handled by | |
| 7498 a `condition-case'. | |
| 7499 If the value is a list, an error only means to display a backtrace | |
| 7500 if one of its condition symbols appears in the list. | |
| 7501 See also variable `stack-trace-on-error'. | |
| 7502 */ ); | |
| 7503 Vstack_trace_on_signal = Qnil; | |
| 7504 | |
| 7505 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7506 *List of errors for which the debugger should not be called. | |
| 7507 Each element may be a condition-name or a regexp that matches error messages. | |
| 7508 If any element applies to a given error, that error skips the debugger | |
| 7509 and just returns to top level. | |
| 7510 This overrides the variable `debug-on-error'. | |
| 7511 It does not apply to errors handled by `condition-case'. | |
| 7512 */ ); | |
| 7513 Vdebug_ignored_errors = Qnil; | |
| 7514 | |
| 7515 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7516 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7517 The debugger will not be entered if the error is handled by | |
| 7518 a `condition-case'. | |
| 7519 If the value is a list, an error only means to enter the debugger | |
| 7520 if one of its condition symbols appears in the list. | |
| 7521 This variable is overridden by `debug-ignored-errors'. | |
| 7522 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7523 |
|
4657
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7524 Process filters are considered to be outside of condition-case forms |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7525 (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
|
7526 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
|
7527 put the expected error\(s) in `debug-ignored-errors'. |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7528 |
| 1123 | 7529 If this variable is set while XEmacs is running noninteractively (using |
| 7530 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7531 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7532 obviously won't work), XEmacs will break out to a C debugger using | |
| 7533 \(force-debugging-signal t). This is useful because debugging | |
| 7534 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7535 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7536 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7537 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7538 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7539 is about to die anyway, and if no debugger is present, this will usefully | |
| 7540 dump core.) The most useful way to set this flag when debugging | |
| 7541 noninteractive runs, especially in makefiles, is using the environment | |
| 7542 variable XEMACSDEBUG, like this: | |
| 771 | 7543 |
| 7544 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7545 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7546 */ ); |
| 7547 Vdebug_on_error = Qnil; | |
| 7548 | |
| 7549 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7550 *Non-nil means enter debugger if an error is signalled. | |
| 7551 The debugger will be entered whether or not the error is handled by | |
| 7552 a `condition-case'. | |
| 7553 If the value is a list, an error only means to enter the debugger | |
| 7554 if one of its condition symbols appears in the list. | |
| 7555 See also variable `debug-on-quit'. | |
| 1123 | 7556 |
| 7557 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7558 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7559 */ ); |
| 7560 Vdebug_on_signal = Qnil; | |
| 7561 | |
| 7562 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7563 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7564 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7565 debugger can also be achieved at any time (for X11 console) by typing | |
| 7566 control-shift-G to signal a critical quit. | |
| 7567 */ ); | |
| 7568 debug_on_quit = 0; | |
| 7569 | |
| 7570 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7571 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7572 */ ); | |
| 7573 | |
| 1292 | 7574 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7575 &backtrace_with_internal_sections /* | |
| 7576 Non-nil means backtraces will contain additional information indicating | |
| 7577 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7578 byte-char conversion, internal-external conversion, etc. This can be | |
| 7579 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7580 */ ); | |
| 7581 #ifdef ERROR_CHECK_STRUCTURES | |
| 7582 backtrace_with_internal_sections = 1; | |
| 7583 #else | |
| 7584 backtrace_with_internal_sections = 0; | |
| 7585 #endif | |
| 7586 | |
| 428 | 7587 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7588 Function to call to invoke debugger. | |
| 7589 If due to frame exit, args are `exit' and the value being returned; | |
| 7590 this function's value will be returned instead of that. | |
| 7591 If due to error, args are `error' and a list of the args to `signal'. | |
| 7592 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7593 If due to `eval' entry, one arg, t. | |
| 7594 */ ); | |
| 7595 Vdebugger = Qnil; | |
| 7596 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7597 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
|
7598 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
|
7599 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7600 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
|
7601 macros and special operators. |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7602 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7603 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
|
7604 |
|
5506
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7605 DEFVAR_LISP ("macro-declaration-function", &Vmacro_declaration_function /* |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7606 Function to process declarations in a macro definition. |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7607 The function will be called with two args MACRO and DECL. |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7608 MACRO is the name of the macro being defined. |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7609 DECL is a list `(declare ...)' containing the declarations. |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7610 The value the function returns is not used. |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7611 */); |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7612 Vmacro_declaration_function = Qnil; |
|
b0d87f92e60b
Complete support for macro-declaration-function, bytecomp{,-runtime}.el
Aidan Kehoe <kehoea@parhasard.net>
parents:
5470
diff
changeset
|
7613 |
| 853 | 7614 staticpro (&Vcatch_everything_tag); |
| 7615 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7616 | |
| 428 | 7617 staticpro (&Vpending_warnings); |
| 7618 Vpending_warnings = Qnil; | |
| 1204 | 7619 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7620 Vpending_warnings_tail = Qnil; |
| 7621 | |
| 793 | 7622 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7623 Vlog_warning_minimum_level = Qinfo; | |
| 7624 | |
| 428 | 7625 staticpro (&Vautoload_queue); |
| 7626 Vautoload_queue = Qnil; | |
| 7627 | |
| 7628 staticpro (&Vcondition_handlers); | |
| 7629 | |
| 853 | 7630 staticpro (&Vdeletable_permanent_display_objects); |
| 7631 Vdeletable_permanent_display_objects = Qnil; | |
| 7632 | |
| 7633 staticpro (&Vmodifiable_buffers); | |
| 7634 Vmodifiable_buffers = Qnil; | |
| 7635 | |
| 7636 inhibit_flags = 0; | |
| 7637 } |