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ec28a64d | 1 | /* Call a Lisp function interactively. |
46947372 | 2 | Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc. |
ec28a64d MB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include "config.h" | |
22 | #include "lisp.h" | |
23 | #include "buffer.h" | |
24 | #include "commands.h" | |
760cbdd3 | 25 | #include "keyboard.h" |
ec28a64d MB |
26 | #include "window.h" |
27 | #include "mocklisp.h" | |
28 | ||
29 | extern char *index (); | |
30 | ||
31 | Lisp_Object Vprefix_arg, Vcurrent_prefix_arg, Qminus; | |
32 | Lisp_Object Qcall_interactively; | |
33 | Lisp_Object Vcommand_history; | |
34 | ||
35 | Lisp_Object Vcommand_debug_status, Qcommand_debug_status; | |
52614803 | 36 | Lisp_Object Qenable_recursive_minibuffers; |
ec28a64d MB |
37 | |
38 | /* This comment supplies the doc string for interactive, | |
39 | for make-docfile to see. We cannot put this in the real DEFUN | |
40 | due to limits in the Unix cpp. | |
41 | ||
42 | DEFUN ("interactive", Ffoo, Sfoo, 0, 0, 0, | |
43 | "Specify a way of parsing arguments for interactive use of a function.\n\ | |
44 | For example, write\n\ | |
45 | (defun foo (arg) \"Doc string\" (interactive \"p\") ...use arg...)\n\ | |
46 | to make ARG be the prefix argument when `foo' is called as a command.\n\ | |
47 | The \"call\" to `interactive' is actually a declaration rather than a function;\n\ | |
48 | it tells `call-interactively' how to read arguments\n\ | |
49 | to pass to the function.\n\ | |
50 | When actually called, `interactive' just returns nil.\n\ | |
51 | \n\ | |
52 | The argument of `interactive' is usually a string containing a code letter\n\ | |
53 | followed by a prompt. (Some code letters do not use I/O to get\n\ | |
54 | the argument and do not need prompts.) To prompt for multiple arguments,\n\ | |
55 | give a code letter, its prompt, a newline, and another code letter, etc.\n\ | |
56 | Prompts are passed to format, and may use % escapes to print the\n\ | |
57 | arguments that have already been read.\n\ | |
58 | If the argument is not a string, it is evaluated to get a list of\n\ | |
59 | arguments to pass to the function.\n\ | |
60 | Just `(interactive)' means pass no args when calling interactively.\n\ | |
61 | \nCode letters available are:\n\ | |
62 | a -- Function name: symbol with a function definition.\n\ | |
63 | b -- Name of existing buffer.\n\ | |
64 | B -- Name of buffer, possibly nonexistent.\n\ | |
65 | c -- Character.\n\ | |
66 | C -- Command name: symbol with interactive function definition.\n\ | |
67 | d -- Value of point as number. Does not do I/O.\n\ | |
68 | D -- Directory name.\n\ | |
bc78232c JB |
69 | e -- Event that invoked this command (value of `last-nonmenu-event').\n\ |
70 | This skips events without parameters.\n\ | |
71 | If used more than once, the Nth 'e' returns the Nth parameterized event.\n\ | |
ec28a64d MB |
72 | f -- Existing file name.\n\ |
73 | F -- Possibly nonexistent file name.\n\ | |
74 | k -- Key sequence (string).\n\ | |
75 | m -- Value of mark as number. Does not do I/O.\n\ | |
76 | n -- Number read using minibuffer.\n\ | |
77 | N -- Prefix arg converted to number, or if none, do like code `n'.\n\ | |
78 | p -- Prefix arg converted to number. Does not do I/O.\n\ | |
79 | P -- Prefix arg in raw form. Does not do I/O.\n\ | |
80 | r -- Region: point and mark as 2 numeric args, smallest first. Does no I/O.\n\ | |
81 | s -- Any string.\n\ | |
82 | S -- Any symbol.\n\ | |
83 | v -- Variable name: symbol that is user-variable-p.\n\ | |
84 | x -- Lisp expression read but not evaluated.\n\ | |
85 | X -- Lisp expression read and evaluated.\n\ | |
86 | In addition, if the string begins with `*'\n\ | |
87 | then an error is signaled if the buffer is read-only.\n\ | |
88 | This happens before reading any arguments.\n\ | |
89 | If the string begins with `@', then the window the mouse is over is selected\n\ | |
90 | before anything else is done. You may use both `@' and `*';\n\ | |
91 | they are processed in the order that they appear." | |
92 | */ | |
93 | ||
94 | /* ARGSUSED */ | |
95 | DEFUN ("interactive", Finteractive, Sinteractive, 0, UNEVALLED, 0, | |
96 | 0 /* See immediately above */) | |
97 | (args) | |
98 | Lisp_Object args; | |
99 | { | |
100 | return Qnil; | |
101 | } | |
102 | ||
103 | /* Quotify EXP: if EXP is constant, return it. | |
104 | If EXP is not constant, return (quote EXP). */ | |
105 | Lisp_Object | |
106 | quotify_arg (exp) | |
107 | register Lisp_Object exp; | |
108 | { | |
109 | if (XTYPE (exp) != Lisp_Int && XTYPE (exp) != Lisp_String | |
265a9e55 | 110 | && !NILP (exp) && !EQ (exp, Qt)) |
ec28a64d MB |
111 | return Fcons (Qquote, Fcons (exp, Qnil)); |
112 | ||
113 | return exp; | |
114 | } | |
115 | ||
116 | /* Modify EXP by quotifying each element (except the first). */ | |
117 | Lisp_Object | |
118 | quotify_args (exp) | |
119 | Lisp_Object exp; | |
120 | { | |
121 | register Lisp_Object tail; | |
122 | register struct Lisp_Cons *ptr; | |
123 | for (tail = exp; CONSP (tail); tail = ptr->cdr) | |
124 | { | |
125 | ptr = XCONS (tail); | |
126 | ptr->car = quotify_arg (ptr->car); | |
127 | } | |
128 | return exp; | |
129 | } | |
130 | ||
131 | char *callint_argfuns[] | |
132 | = {"", "point", "mark", "region-beginning", "region-end"}; | |
133 | ||
134 | static void | |
135 | check_mark () | |
136 | { | |
137 | Lisp_Object tem = Fmarker_buffer (current_buffer->mark); | |
265a9e55 | 138 | if (NILP (tem) || (XBUFFER (tem) != current_buffer)) |
ec28a64d MB |
139 | error ("The mark is not set now"); |
140 | } | |
141 | ||
142 | ||
143 | DEFUN ("call-interactively", Fcall_interactively, Scall_interactively, 1, 2, 0, | |
144 | "Call FUNCTION, reading args according to its interactive calling specs.\n\ | |
145 | The function contains a specification of how to do the argument reading.\n\ | |
146 | In the case of user-defined functions, this is specified by placing a call\n\ | |
147 | to the function `interactive' at the top level of the function body.\n\ | |
148 | See `interactive'.\n\ | |
149 | \n\ | |
150 | Optional second arg RECORD-FLAG non-nil\n\ | |
151 | means unconditionally put this command in the command-history.\n\ | |
152 | Otherwise, this is done only if an arg is read using the minibuffer.") | |
153 | (function, record) | |
154 | Lisp_Object function, record; | |
155 | { | |
156 | Lisp_Object *args, *visargs; | |
157 | unsigned char **argstrings; | |
158 | Lisp_Object fun; | |
159 | Lisp_Object funcar; | |
160 | Lisp_Object specs; | |
161 | Lisp_Object teml; | |
52614803 RS |
162 | Lisp_Object enable; |
163 | int speccount = specpdl_ptr - specpdl; | |
ec28a64d | 164 | |
bc78232c JB |
165 | /* The index of the next element of this_command_keys to examine for |
166 | the 'e' interactive code. */ | |
167 | int next_event = 0; | |
168 | ||
ec28a64d MB |
169 | Lisp_Object prefix_arg; |
170 | unsigned char *string; | |
171 | unsigned char *tem; | |
63007de2 JB |
172 | |
173 | /* If varies[i] > 0, the i'th argument shouldn't just have its value | |
174 | in this call quoted in the command history. It should be | |
175 | recorded as a call to the function named callint_argfuns[varies[i]]. */ | |
ec28a64d | 176 | int *varies; |
63007de2 | 177 | |
ec28a64d MB |
178 | register int i, j; |
179 | int count, foo; | |
180 | char prompt[100]; | |
181 | char prompt1[100]; | |
182 | char *tem1; | |
183 | int arg_from_tty = 0; | |
184 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
185 | ||
e5d77022 | 186 | /* Save this now, since use of minibuffer will clobber it. */ |
ec28a64d MB |
187 | prefix_arg = Vcurrent_prefix_arg; |
188 | ||
46947372 | 189 | retry: |
ec28a64d | 190 | |
afa4c0f3 JB |
191 | if (XTYPE (function) == Lisp_Symbol) |
192 | enable = Fget (function, Qenable_recursive_minibuffers); | |
52614803 | 193 | |
ffd56f97 | 194 | fun = indirect_function (function); |
ec28a64d MB |
195 | |
196 | specs = Qnil; | |
197 | string = 0; | |
198 | ||
199 | /* Decode the kind of function. Either handle it and return, | |
200 | or go to `lose' if not interactive, or go to `retry' | |
201 | to specify a different function, or set either STRING or SPECS. */ | |
202 | ||
203 | if (XTYPE (fun) == Lisp_Subr) | |
204 | { | |
205 | string = (unsigned char *) XSUBR (fun)->prompt; | |
206 | if (!string) | |
207 | { | |
208 | lose: | |
209 | function = wrong_type_argument (Qcommandp, function, 0); | |
210 | goto retry; | |
211 | } | |
212 | if ((int) string == 1) | |
213 | /* Let SPECS (which is nil) be used as the args. */ | |
214 | string = 0; | |
215 | } | |
216 | else if (XTYPE (fun) == Lisp_Compiled) | |
217 | { | |
218 | if (XVECTOR (fun)->size <= COMPILED_INTERACTIVE) | |
219 | goto lose; | |
220 | specs = XVECTOR (fun)->contents[COMPILED_INTERACTIVE]; | |
221 | } | |
222 | else if (!CONSP (fun)) | |
223 | goto lose; | |
224 | else if (funcar = Fcar (fun), EQ (funcar, Qautoload)) | |
225 | { | |
226 | GCPRO2 (function, prefix_arg); | |
227 | do_autoload (fun, function); | |
228 | UNGCPRO; | |
229 | goto retry; | |
230 | } | |
231 | else if (EQ (funcar, Qlambda)) | |
232 | { | |
233 | specs = Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
265a9e55 | 234 | if (NILP (specs)) |
ec28a64d MB |
235 | goto lose; |
236 | specs = Fcar (Fcdr (specs)); | |
237 | } | |
238 | else if (EQ (funcar, Qmocklisp)) | |
239 | return ml_apply (fun, Qinteractive); | |
240 | else | |
241 | goto lose; | |
242 | ||
46947372 | 243 | /* If either specs or string is set to a string, use it. */ |
ec28a64d | 244 | if (XTYPE (specs) == Lisp_String) |
46947372 JB |
245 | { |
246 | /* Make a copy of string so that if a GC relocates specs, | |
247 | `string' will still be valid. */ | |
e5d77022 | 248 | string = (unsigned char *) alloca (XSTRING (specs)->size + 1); |
46947372 JB |
249 | bcopy (XSTRING (specs)->data, string, XSTRING (specs)->size + 1); |
250 | } | |
ec28a64d MB |
251 | else if (string == 0) |
252 | { | |
253 | i = num_input_chars; | |
254 | specs = Feval (specs); | |
265a9e55 | 255 | if (i != num_input_chars || !NILP (record)) |
ec28a64d MB |
256 | Vcommand_history |
257 | = Fcons (Fcons (function, quotify_args (Fcopy_sequence (specs))), | |
258 | Vcommand_history); | |
259 | return apply1 (function, specs); | |
260 | } | |
261 | ||
262 | /* Here if function specifies a string to control parsing the defaults */ | |
263 | ||
264 | /* Handle special starting chars `*' and `@'. */ | |
265 | while (1) | |
266 | { | |
267 | if (*string == '*') | |
268 | { | |
269 | string++; | |
265a9e55 | 270 | if (!NILP (current_buffer->read_only)) |
ec28a64d MB |
271 | Fbarf_if_buffer_read_only (); |
272 | } | |
273 | else if (*string == '@') | |
274 | { | |
275 | string++; | |
265a9e55 | 276 | if (!NILP (Vmouse_window)) |
ec28a64d MB |
277 | Fselect_window (Vmouse_window); |
278 | } | |
279 | else break; | |
280 | } | |
281 | ||
282 | /* Count the number of arguments the interactive spec would have | |
283 | us give to the function. */ | |
284 | tem = string; | |
285 | for (j = 0; *tem; j++) | |
286 | { | |
287 | /* 'r' specifications ("point and mark as 2 numeric args") | |
288 | produce *two* arguments. */ | |
289 | if (*tem == 'r') j++; | |
290 | tem = (unsigned char *) index (tem, '\n'); | |
291 | if (tem) | |
292 | tem++; | |
293 | else | |
294 | tem = (unsigned char *) ""; | |
295 | } | |
296 | count = j; | |
297 | ||
298 | args = (Lisp_Object *) alloca ((count + 1) * sizeof (Lisp_Object)); | |
299 | visargs = (Lisp_Object *) alloca ((count + 1) * sizeof (Lisp_Object)); | |
300 | argstrings = (unsigned char **) alloca ((count + 1) * sizeof (char *)); | |
301 | varies = (int *) alloca ((count + 1) * sizeof (int)); | |
302 | ||
303 | for (i = 0; i < (count + 1); i++) | |
304 | { | |
305 | args[i] = Qnil; | |
306 | visargs[i] = Qnil; | |
307 | varies[i] = 0; | |
308 | } | |
309 | ||
310 | GCPRO4 (prefix_arg, function, *args, *visargs); | |
311 | gcpro3.nvars = (count + 1); | |
312 | gcpro4.nvars = (count + 1); | |
313 | ||
52614803 RS |
314 | if (!NILP (enable)) |
315 | specbind (Qenable_recursive_minibuffers, Qt); | |
316 | ||
ec28a64d | 317 | tem = string; |
46947372 | 318 | for (i = 1; *tem; i++) |
ec28a64d MB |
319 | { |
320 | strncpy (prompt1, tem + 1, sizeof prompt1 - 1); | |
321 | prompt1[sizeof prompt1 - 1] = 0; | |
322 | tem1 = index (prompt1, '\n'); | |
323 | if (tem1) *tem1 = 0; | |
324 | /* Fill argstrings with a vector of C strings | |
325 | corresponding to the Lisp strings in visargs. */ | |
326 | for (j = 1; j < i; j++) | |
327 | argstrings[j] | |
328 | = EQ (visargs[j], Qnil) | |
329 | ? (unsigned char *) "" | |
46947372 | 330 | : XSTRING (visargs[j])->data; |
ec28a64d MB |
331 | |
332 | doprnt (prompt, sizeof prompt, prompt1, 0, j - 1, argstrings + 1); | |
333 | ||
334 | switch (*tem) | |
335 | { | |
336 | case 'a': /* Symbol defined as a function */ | |
337 | visargs[i] = Fcompleting_read (build_string (prompt), | |
338 | Vobarray, Qfboundp, Qt, Qnil, Qnil); | |
339 | /* Passing args[i] directly stimulates compiler bug */ | |
340 | teml = visargs[i]; | |
341 | args[i] = Fintern (teml, Qnil); | |
342 | break; | |
343 | ||
344 | case 'b': /* Name of existing buffer */ | |
345 | args[i] = Fcurrent_buffer (); | |
346 | if (EQ (selected_window, minibuf_window)) | |
9262fcb6 | 347 | args[i] = Fother_buffer (args[i], Qnil); |
ec28a64d MB |
348 | args[i] = Fread_buffer (build_string (prompt), args[i], Qt); |
349 | break; | |
350 | ||
351 | case 'B': /* Name of buffer, possibly nonexistent */ | |
352 | args[i] = Fread_buffer (build_string (prompt), | |
9262fcb6 RS |
353 | Fother_buffer (Fcurrent_buffer (), Qnil), |
354 | Qnil); | |
ec28a64d MB |
355 | break; |
356 | ||
357 | case 'c': /* Character */ | |
358 | message1 (prompt); | |
359 | args[i] = Fread_char (); | |
360 | /* Passing args[i] directly stimulates compiler bug */ | |
361 | teml = args[i]; | |
362 | visargs[i] = Fchar_to_string (teml); | |
363 | break; | |
364 | ||
365 | case 'C': /* Command: symbol with interactive function */ | |
366 | visargs[i] = Fcompleting_read (build_string (prompt), | |
367 | Vobarray, Qcommandp, Qt, Qnil, Qnil); | |
368 | /* Passing args[i] directly stimulates compiler bug */ | |
369 | teml = visargs[i]; | |
370 | args[i] = Fintern (teml, Qnil); | |
371 | break; | |
372 | ||
373 | case 'd': /* Value of point. Does not do I/O. */ | |
374 | XFASTINT (args[i]) = point; | |
375 | /* visargs[i] = Qnil; */ | |
376 | varies[i] = 1; | |
377 | break; | |
378 | ||
ec28a64d MB |
379 | case 'D': /* Directory name. */ |
380 | args[i] = Fread_file_name (build_string (prompt), Qnil, | |
381 | current_buffer->directory, Qlambda, Qnil); | |
382 | break; | |
383 | ||
384 | case 'f': /* Existing file name. */ | |
385 | args[i] = Fread_file_name (build_string (prompt), | |
386 | Qnil, Qnil, Qlambda, Qnil); | |
387 | break; | |
388 | ||
389 | case 'F': /* Possibly nonexistent file name. */ | |
390 | args[i] = Fread_file_name (build_string (prompt), | |
391 | Qnil, Qnil, Qnil, Qnil); | |
392 | break; | |
393 | ||
394 | case 'k': /* Key sequence (string) */ | |
63007de2 | 395 | args[i] = Fread_key_sequence (build_string (prompt), Qnil); |
ec28a64d MB |
396 | teml = args[i]; |
397 | visargs[i] = Fkey_description (teml); | |
398 | break; | |
399 | ||
bc78232c JB |
400 | case 'e': /* The invoking event. */ |
401 | /* Find the next parameterized event. */ | |
402 | while (next_event < this_command_key_count | |
403 | && ! EVENT_HAS_PARAMETERS (this_command_keys[next_event])) | |
404 | next_event++; | |
405 | if (next_event >= this_command_key_count) | |
406 | error ("%s must be bound to an event with parameters", | |
63007de2 JB |
407 | (XTYPE (function) == Lisp_Symbol |
408 | ? (char *) XSYMBOL (function)->name->data | |
bc78232c JB |
409 | : "command")); |
410 | args[i] = this_command_keys[next_event++]; | |
e5d77022 | 411 | varies[i] = -1; |
63007de2 JB |
412 | break; |
413 | ||
ec28a64d MB |
414 | case 'm': /* Value of mark. Does not do I/O. */ |
415 | check_mark (); | |
416 | /* visargs[i] = Qnil; */ | |
417 | XFASTINT (args[i]) = marker_position (current_buffer->mark); | |
418 | varies[i] = 2; | |
419 | break; | |
420 | ||
421 | case 'N': /* Prefix arg, else number from minibuffer */ | |
265a9e55 | 422 | if (!NILP (prefix_arg)) |
ec28a64d MB |
423 | goto have_prefix_arg; |
424 | case 'n': /* Read number from minibuffer. */ | |
425 | do | |
426 | args[i] = Fread_minibuffer (build_string (prompt), Qnil); | |
4746118a | 427 | while (! NUMBERP (args[i])); |
ec28a64d MB |
428 | visargs[i] = last_minibuf_string; |
429 | break; | |
430 | ||
431 | case 'P': /* Prefix arg in raw form. Does no I/O. */ | |
432 | have_prefix_arg: | |
433 | args[i] = prefix_arg; | |
434 | /* visargs[i] = Qnil; */ | |
435 | varies[i] = -1; | |
436 | break; | |
437 | ||
438 | case 'p': /* Prefix arg converted to number. No I/O. */ | |
439 | args[i] = Fprefix_numeric_value (prefix_arg); | |
440 | /* visargs[i] = Qnil; */ | |
441 | varies[i] = -1; | |
442 | break; | |
443 | ||
444 | case 'r': /* Region, point and mark as 2 args. */ | |
445 | check_mark (); | |
446 | /* visargs[i+1] = Qnil; */ | |
447 | foo = marker_position (current_buffer->mark); | |
448 | /* visargs[i] = Qnil; */ | |
449 | XFASTINT (args[i]) = point < foo ? point : foo; | |
450 | varies[i] = 3; | |
451 | XFASTINT (args[++i]) = point > foo ? point : foo; | |
452 | varies[i] = 4; | |
453 | break; | |
454 | ||
455 | case 's': /* String read via minibuffer. */ | |
456 | args[i] = Fread_string (build_string (prompt), Qnil); | |
457 | break; | |
458 | ||
459 | case 'S': /* Any symbol. */ | |
15c65264 | 460 | visargs[i] = Fread_no_blanks_input (build_string (prompt), Qnil); |
ec28a64d MB |
461 | /* Passing args[i] directly stimulates compiler bug */ |
462 | teml = visargs[i]; | |
463 | args[i] = Fintern (teml, Qnil); | |
464 | break; | |
465 | ||
466 | case 'v': /* Variable name: symbol that is | |
467 | user-variable-p. */ | |
468 | args[i] = Fread_variable (build_string (prompt)); | |
469 | visargs[i] = last_minibuf_string; | |
470 | break; | |
471 | ||
472 | case 'x': /* Lisp expression read but not evaluated */ | |
473 | args[i] = Fread_minibuffer (build_string (prompt), Qnil); | |
474 | visargs[i] = last_minibuf_string; | |
475 | break; | |
476 | ||
477 | case 'X': /* Lisp expression read and evaluated */ | |
478 | args[i] = Feval_minibuffer (build_string (prompt), Qnil); | |
479 | visargs[i] = last_minibuf_string; | |
480 | break; | |
481 | ||
482 | default: | |
483 | error ("Invalid control letter \"%c\" (%03o) in interactive calling string", | |
484 | *tem, *tem); | |
485 | } | |
486 | ||
487 | if (varies[i] == 0) | |
488 | arg_from_tty = 1; | |
489 | ||
265a9e55 | 490 | if (NILP (visargs[i]) && XTYPE (args[i]) == Lisp_String) |
ec28a64d MB |
491 | visargs[i] = args[i]; |
492 | ||
493 | tem = (unsigned char *) index (tem, '\n'); | |
494 | if (tem) tem++; | |
495 | else tem = (unsigned char *) ""; | |
496 | } | |
52614803 | 497 | unbind_to (speccount, Qnil); |
ec28a64d MB |
498 | |
499 | QUIT; | |
500 | ||
501 | args[0] = function; | |
502 | ||
265a9e55 | 503 | if (arg_from_tty || !NILP (record)) |
ec28a64d MB |
504 | { |
505 | visargs[0] = function; | |
63007de2 JB |
506 | for (i = 1; i < count + 1; i++) |
507 | if (varies[i] > 0) | |
ec28a64d MB |
508 | visargs[i] = Fcons (intern (callint_argfuns[varies[i]]), Qnil); |
509 | else | |
510 | visargs[i] = quotify_arg (args[i]); | |
511 | Vcommand_history = Fcons (Flist (count + 1, visargs), | |
512 | Vcommand_history); | |
513 | } | |
514 | ||
515 | { | |
516 | Lisp_Object val; | |
ec28a64d MB |
517 | specbind (Qcommand_debug_status, Qnil); |
518 | ||
519 | val = Ffuncall (count + 1, args); | |
520 | UNGCPRO; | |
521 | return unbind_to (speccount, val); | |
522 | } | |
523 | } | |
524 | ||
525 | DEFUN ("prefix-numeric-value", Fprefix_numeric_value, Sprefix_numeric_value, | |
526 | 1, 1, 0, | |
527 | "Return numeric meaning of raw prefix argument ARG.\n\ | |
528 | A raw prefix argument is what you get from `(interactive \"P\")'.\n\ | |
529 | Its numeric meaning is what you would get from `(interactive \"p\")'.") | |
530 | (raw) | |
531 | Lisp_Object raw; | |
532 | { | |
533 | Lisp_Object val; | |
534 | ||
535 | /* Tag val as an integer, so the rest of the assignments | |
536 | may use XSETINT. */ | |
537 | XFASTINT (val) = 0; | |
538 | ||
265a9e55 | 539 | if (NILP (raw)) |
ec28a64d | 540 | XFASTINT (val) = 1; |
fd5285f3 | 541 | else if (EQ (raw, Qminus)) |
ec28a64d MB |
542 | XSETINT (val, -1); |
543 | else if (CONSP (raw)) | |
544 | XSETINT (val, XINT (XCONS (raw)->car)); | |
545 | else if (XTYPE (raw) == Lisp_Int) | |
546 | val = raw; | |
547 | else | |
548 | XFASTINT (val) = 1; | |
549 | ||
550 | return val; | |
551 | } | |
552 | ||
553 | syms_of_callint () | |
554 | { | |
555 | Qminus = intern ("-"); | |
556 | staticpro (&Qminus); | |
557 | ||
558 | Qcall_interactively = intern ("call-interactively"); | |
559 | staticpro (&Qcall_interactively); | |
560 | ||
561 | Qcommand_debug_status = intern ("command-debug-status"); | |
562 | staticpro (&Qcommand_debug_status); | |
563 | ||
52614803 RS |
564 | Qenable_recursive_minibuffers = intern ("enable-recursive-minibuffers"); |
565 | staticpro (&Qenable_recursive_minibuffers); | |
566 | ||
ec28a64d MB |
567 | DEFVAR_LISP ("prefix-arg", &Vprefix_arg, |
568 | "The value of the prefix argument for the next editing command.\n\ | |
569 | It may be a number, or the symbol `-' for just a minus sign as arg,\n\ | |
570 | or a list whose car is a number for just one or more C-U's\n\ | |
571 | or nil if no argument has been specified.\n\ | |
572 | \n\ | |
573 | You cannot examine this variable to find the argument for this command\n\ | |
574 | since it has been set to nil by the time you can look.\n\ | |
575 | Instead, you should use the variable `current-prefix-arg', although\n\ | |
576 | normally commands can get this prefix argument with (interactive \"P\")."); | |
577 | Vprefix_arg = Qnil; | |
578 | ||
579 | DEFVAR_LISP ("current-prefix-arg", &Vcurrent_prefix_arg, | |
580 | "The value of the prefix argument for this editing command.\n\ | |
581 | It may be a number, or the symbol `-' for just a minus sign as arg,\n\ | |
582 | or a list whose car is a number for just one or more C-U's\n\ | |
583 | or nil if no argument has been specified.\n\ | |
584 | This is what `(interactive \"P\")' returns."); | |
585 | Vcurrent_prefix_arg = Qnil; | |
586 | ||
587 | DEFVAR_LISP ("command-history", &Vcommand_history, | |
588 | "List of recent commands that read arguments from terminal.\n\ | |
589 | Each command is represented as a form to evaluate."); | |
590 | Vcommand_history = Qnil; | |
591 | ||
592 | DEFVAR_LISP ("command-debug-status", &Vcommand_debug_status, | |
593 | "Debugging status of current interactive command.\n\ | |
594 | Bound each time `call-interactively' is called;\n\ | |
595 | may be set by the debugger as a reminder for itself."); | |
596 | Vcommand_debug_status = Qnil; | |
597 | ||
598 | defsubr (&Sinteractive); | |
599 | defsubr (&Scall_interactively); | |
600 | defsubr (&Sprefix_numeric_value); | |
601 | } |