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c88ab9ce | 1 | ;;; subr.el --- basic lisp subroutines for Emacs |
630cc463 | 2 | |
d733c5ec | 3 | ;;; Copyright (C) 1985, 1986, 1992, 1994 Free Software Foundation, Inc. |
be9b65ac DL |
4 | |
5 | ;; This file is part of GNU Emacs. | |
6 | ||
7 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
8 | ;; it under the terms of the GNU General Public License as published by | |
492878e4 | 9 | ;; the Free Software Foundation; either version 2, or (at your option) |
be9b65ac DL |
10 | ;; any later version. |
11 | ||
12 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
13 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ;; GNU General Public License for more details. | |
16 | ||
17 | ;; You should have received a copy of the GNU General Public License | |
18 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
19 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | ||
630cc463 | 21 | ;;; Code: |
be9b65ac | 22 | |
9a5336ae JB |
23 | \f |
24 | ;;;; Lisp language features. | |
25 | ||
26 | (defmacro lambda (&rest cdr) | |
27 | "Return a lambda expression. | |
28 | A call of the form (lambda ARGS DOCSTRING INTERACTIVE BODY) is | |
29 | self-quoting; the result of evaluating the lambda expression is the | |
30 | expression itself. The lambda expression may then be treated as a | |
bec0d7f9 RS |
31 | function, i.e., stored as the function value of a symbol, passed to |
32 | funcall or mapcar, etc. | |
33 | ||
9a5336ae JB |
34 | ARGS should take the same form as an argument list for a `defun'. |
35 | DOCSTRING should be a string, as described for `defun'. It may be omitted. | |
36 | INTERACTIVE should be a call to the function `interactive', which see. | |
37 | It may also be omitted. | |
38 | BODY should be a list of lisp expressions." | |
39 | ;; Note that this definition should not use backquotes; subr.el should not | |
40 | ;; depend on backquote.el. | |
41 | (list 'function (cons 'lambda cdr))) | |
42 | ||
43 | ;;(defmacro defun-inline (name args &rest body) | |
44 | ;; "Create an \"inline defun\" (actually a macro). | |
45 | ;;Use just like `defun'." | |
46 | ;; (nconc (list 'defmacro name '(&rest args)) | |
47 | ;; (if (stringp (car body)) | |
48 | ;; (prog1 (list (car body)) | |
49 | ;; (setq body (or (cdr body) body)))) | |
50 | ;; (list (list 'cons (list 'quote | |
51 | ;; (cons 'lambda (cons args body))) | |
52 | ;; 'args)))) | |
53 | ||
54 | \f | |
55 | ;;;; Window tree functions. | |
56 | ||
e0de7bcb | 57 | (defun one-window-p (&optional nomini all-frames) |
1f4554cc | 58 | "Returns non-nil if the selected window is the only window (in its frame). |
be9b65ac | 59 | Optional arg NOMINI non-nil means don't count the minibuffer |
e0de7bcb RS |
60 | even if it is active. |
61 | ||
62 | The optional arg ALL-FRAMES t means count windows on all frames. | |
63 | If it is `visible', count windows on all visible frames. | |
64 | ALL-FRAMES nil or omitted means count only the selected frame, | |
65 | plus the minibuffer it uses (which may be on another frame). | |
66 | If ALL-FRAMES is neither nil nor t, count only the selected frame." | |
492878e4 JB |
67 | (let ((base-window (selected-window))) |
68 | (if (and nomini (eq base-window (minibuffer-window))) | |
69 | (setq base-window (next-window base-window))) | |
70 | (eq base-window | |
e0de7bcb | 71 | (next-window base-window (if nomini 'arg) all-frames)))) |
be9b65ac | 72 | |
0cc89026 | 73 | (defun walk-windows (proc &optional minibuf all-frames) |
be9b65ac DL |
74 | "Cycle through all visible windows, calling PROC for each one. |
75 | PROC is called with a window as argument. | |
76 | Optional second arg MINIBUF t means count the minibuffer window | |
77 | even if not active. If MINIBUF is neither t nor nil it means | |
78 | not to count the minibuffer even if it is active. | |
f1f2d09a RS |
79 | |
80 | Optional third arg ALL-FRAMES, if t, means include all frames. | |
81 | ALL-FRAMES nil or omitted means cycle within the selected frame, | |
82 | but include the minibuffer window (if MINIBUF says so) that that | |
83 | frame uses, even if it is on another frame. | |
84 | If ALL-FRAMES is neither nil nor t, stick strictly to the selected frame." | |
7a18f5c2 RS |
85 | ;; If we start from the minibuffer window, don't fail to come back to it. |
86 | (if (window-minibuffer-p (selected-window)) | |
87 | (setq minibuf t)) | |
be9b65ac DL |
88 | (let* ((walk-windows-start (selected-window)) |
89 | (walk-windows-current walk-windows-start)) | |
90 | (while (progn | |
91 | (setq walk-windows-current | |
0cc89026 | 92 | (next-window walk-windows-current minibuf all-frames)) |
be9b65ac DL |
93 | (funcall proc walk-windows-current) |
94 | (not (eq walk-windows-current walk-windows-start)))))) | |
95 | ||
79e0df73 RS |
96 | (defun minibuffer-window-active-p (window) |
97 | "Return t if WINDOW (a minibuffer window) is now active." | |
98 | ;; nil nil means include WINDOW's frame | |
99 | ;; and other frames using WINDOW as minibuffer, | |
100 | ;; and include minibuffer if active. | |
101 | (let ((prev (previous-window window nil nil))) | |
102 | ;; If PREV equals WINDOW, WINDOW must be on a minibuffer-only frame | |
103 | ;; and it's not currently being used. So return nil. | |
104 | (and (not (eq window prev)) | |
105 | (let ((should-be-same (next-window prev nil nil))) | |
106 | ;; If next-window doesn't reverse previous-window, | |
107 | ;; WINDOW must be outside the cycle specified by nil nil. | |
108 | (eq should-be-same window))))) | |
9a5336ae JB |
109 | \f |
110 | ;;;; Keymap support. | |
be9b65ac DL |
111 | |
112 | (defun undefined () | |
113 | (interactive) | |
114 | (ding)) | |
115 | ||
116 | ;Prevent the \{...} documentation construct | |
117 | ;from mentioning keys that run this command. | |
118 | (put 'undefined 'suppress-keymap t) | |
119 | ||
120 | (defun suppress-keymap (map &optional nodigits) | |
121 | "Make MAP override all normally self-inserting keys to be undefined. | |
122 | Normally, as an exception, digits and minus-sign are set to make prefix args, | |
123 | but optional second arg NODIGITS non-nil treats them like other chars." | |
80e7b471 | 124 | (substitute-key-definition 'self-insert-command 'undefined map global-map) |
be9b65ac DL |
125 | (or nodigits |
126 | (let (loop) | |
127 | (define-key map "-" 'negative-argument) | |
128 | ;; Make plain numbers do numeric args. | |
129 | (setq loop ?0) | |
130 | (while (<= loop ?9) | |
131 | (define-key map (char-to-string loop) 'digit-argument) | |
132 | (setq loop (1+ loop)))))) | |
133 | ||
be9b65ac DL |
134 | ;Moved to keymap.c |
135 | ;(defun copy-keymap (keymap) | |
136 | ; "Return a copy of KEYMAP" | |
137 | ; (while (not (keymapp keymap)) | |
138 | ; (setq keymap (signal 'wrong-type-argument (list 'keymapp keymap)))) | |
139 | ; (if (vectorp keymap) | |
140 | ; (copy-sequence keymap) | |
141 | ; (copy-alist keymap))) | |
142 | ||
f14dbba7 KH |
143 | (defvar key-substitution-in-progress nil |
144 | "Used internally by substitute-key-definition.") | |
145 | ||
7f2c2edd | 146 | (defun substitute-key-definition (olddef newdef keymap &optional oldmap prefix) |
be9b65ac DL |
147 | "Replace OLDDEF with NEWDEF for any keys in KEYMAP now defined as OLDDEF. |
148 | In other words, OLDDEF is replaced with NEWDEF where ever it appears. | |
7f2c2edd RS |
149 | If optional fourth argument OLDMAP is specified, we redefine |
150 | in KEYMAP as NEWDEF those chars which are defined as OLDDEF in OLDMAP." | |
151 | (or prefix (setq prefix "")) | |
152 | (let* ((scan (or oldmap keymap)) | |
153 | (vec1 (vector nil)) | |
f14dbba7 KH |
154 | (prefix1 (vconcat prefix vec1)) |
155 | (key-substitution-in-progress | |
156 | (cons scan key-substitution-in-progress))) | |
7f2c2edd RS |
157 | ;; Scan OLDMAP, finding each char or event-symbol that |
158 | ;; has any definition, and act on it with hack-key. | |
159 | (while (consp scan) | |
160 | (if (consp (car scan)) | |
161 | (let ((char (car (car scan))) | |
162 | (defn (cdr (car scan)))) | |
163 | ;; The inside of this let duplicates exactly | |
164 | ;; the inside of the following let that handles array elements. | |
165 | (aset vec1 0 char) | |
166 | (aset prefix1 (length prefix) char) | |
44d798af | 167 | (let (inner-def skipped) |
7f2c2edd RS |
168 | ;; Skip past menu-prompt. |
169 | (while (stringp (car-safe defn)) | |
44d798af | 170 | (setq skipped (cons (car defn) skipped)) |
7f2c2edd | 171 | (setq defn (cdr defn))) |
e025dddf RS |
172 | ;; Skip past cached key-equivalence data for menu items. |
173 | (and (consp defn) (consp (car defn)) | |
174 | (setq defn (cdr defn))) | |
7f2c2edd | 175 | (setq inner-def defn) |
e025dddf | 176 | ;; Look past a symbol that names a keymap. |
7f2c2edd RS |
177 | (while (and (symbolp inner-def) |
178 | (fboundp inner-def)) | |
179 | (setq inner-def (symbol-function inner-def))) | |
180 | (if (eq defn olddef) | |
44d798af | 181 | (define-key keymap prefix1 (nconc (nreverse skipped) newdef)) |
f14dbba7 | 182 | (if (and (keymapp defn) |
350b7567 RS |
183 | ;; Avoid recursively scanning |
184 | ;; where KEYMAP does not have a submap. | |
185 | (keymapp (lookup-key keymap prefix1)) | |
186 | ;; Avoid recursively rescanning keymap being scanned. | |
f14dbba7 KH |
187 | (not (memq inner-def |
188 | key-substitution-in-progress))) | |
e025dddf RS |
189 | ;; If this one isn't being scanned already, |
190 | ;; scan it now. | |
7f2c2edd RS |
191 | (substitute-key-definition olddef newdef keymap |
192 | inner-def | |
193 | prefix1))))) | |
194 | (if (arrayp (car scan)) | |
195 | (let* ((array (car scan)) | |
196 | (len (length array)) | |
197 | (i 0)) | |
198 | (while (< i len) | |
199 | (let ((char i) (defn (aref array i))) | |
200 | ;; The inside of this let duplicates exactly | |
201 | ;; the inside of the previous let. | |
202 | (aset vec1 0 char) | |
203 | (aset prefix1 (length prefix) char) | |
44d798af | 204 | (let (inner-def skipped) |
7f2c2edd RS |
205 | ;; Skip past menu-prompt. |
206 | (while (stringp (car-safe defn)) | |
44d798af | 207 | (setq skipped (cons (car defn) skipped)) |
7f2c2edd | 208 | (setq defn (cdr defn))) |
e025dddf RS |
209 | (and (consp defn) (consp (car defn)) |
210 | (setq defn (cdr defn))) | |
7f2c2edd RS |
211 | (setq inner-def defn) |
212 | (while (and (symbolp inner-def) | |
213 | (fboundp inner-def)) | |
214 | (setq inner-def (symbol-function inner-def))) | |
215 | (if (eq defn olddef) | |
44d798af RS |
216 | (define-key keymap prefix1 |
217 | (nconc (nreverse skipped) newdef)) | |
f14dbba7 | 218 | (if (and (keymapp defn) |
350b7567 | 219 | (keymapp (lookup-key keymap prefix1)) |
f14dbba7 KH |
220 | (not (memq inner-def |
221 | key-substitution-in-progress))) | |
7f2c2edd RS |
222 | (substitute-key-definition olddef newdef keymap |
223 | inner-def | |
224 | prefix1))))) | |
225 | (setq i (1+ i)))))) | |
226 | (setq scan (cdr scan))))) | |
9a5336ae | 227 | |
06ae9cf2 | 228 | (defun define-key-after (keymap key definition after) |
4434d61b RS |
229 | "Add binding in KEYMAP for KEY => DEFINITION, right after AFTER's binding. |
230 | This is like `define-key' except that the binding for KEY is placed | |
231 | just after the binding for the event AFTER, instead of at the beginning | |
232 | of the map. | |
626f67f3 | 233 | The order matters when the keymap is used as a menu. |
9ed287b0 RS |
234 | KEY must contain just one event type--that is to say, it must be |
235 | a string or vector of length 1." | |
4434d61b RS |
236 | (or (keymapp keymap) |
237 | (signal 'wrong-type-argument (list 'keymapp keymap))) | |
ab375e6c | 238 | (if (> (length key) 1) |
626f67f3 | 239 | (error "multi-event key specified in `define-key-after'")) |
113d28a8 | 240 | (let ((tail keymap) done inserted |
4434d61b RS |
241 | (first (aref key 0))) |
242 | (while (and (not done) tail) | |
243 | ;; Delete any earlier bindings for the same key. | |
244 | (if (eq (car-safe (car (cdr tail))) first) | |
245 | (setcdr tail (cdr (cdr tail)))) | |
246 | ;; When we reach AFTER's binding, insert the new binding after. | |
247 | ;; If we reach an inherited keymap, insert just before that. | |
113d28a8 | 248 | ;; If we reach the end of this keymap, insert at the end. |
4434d61b | 249 | (if (or (eq (car-safe (car tail)) after) |
113d28a8 RS |
250 | (eq (car (cdr tail)) 'keymap) |
251 | (null (cdr tail))) | |
4434d61b | 252 | (progn |
113d28a8 RS |
253 | ;; Stop the scan only if we find a parent keymap. |
254 | ;; Keep going past the inserted element | |
255 | ;; so we can delete any duplications that come later. | |
256 | (if (eq (car (cdr tail)) 'keymap) | |
257 | (setq done t)) | |
258 | ;; Don't insert more than once. | |
259 | (or inserted | |
260 | (setcdr tail (cons (cons (aref key 0) definition) (cdr tail)))) | |
261 | (setq inserted t))) | |
4434d61b RS |
262 | (setq tail (cdr tail))))) |
263 | ||
9a5336ae JB |
264 | (defun keyboard-translate (from to) |
265 | "Translate character FROM to TO at a low level. | |
266 | This function creates a `keyboard-translate-table' if necessary | |
267 | and then modifies one entry in it." | |
268 | (or (arrayp keyboard-translate-table) | |
269 | (setq keyboard-translate-table "")) | |
270 | (if (or (> from (length keyboard-translate-table)) | |
271 | (> to (length keyboard-translate-table))) | |
272 | (progn | |
273 | (let* ((i (length keyboard-translate-table)) | |
f4ebbdbe RS |
274 | (table (concat keyboard-translate-table |
275 | (make-string (- 256 i) 0)))) | |
9a5336ae JB |
276 | (while (< i 256) |
277 | (aset table i i) | |
278 | (setq i (1+ i))) | |
279 | (setq keyboard-translate-table table)))) | |
280 | (aset keyboard-translate-table from to)) | |
281 | ||
282 | \f | |
283 | ;;;; The global keymap tree. | |
284 | ||
285 | ;;; global-map, esc-map, and ctl-x-map have their values set up in | |
286 | ;;; keymap.c; we just give them docstrings here. | |
287 | ||
288 | (defvar global-map nil | |
289 | "Default global keymap mapping Emacs keyboard input into commands. | |
290 | The value is a keymap which is usually (but not necessarily) Emacs's | |
291 | global map.") | |
292 | ||
293 | (defvar esc-map nil | |
294 | "Default keymap for ESC (meta) commands. | |
295 | The normal global definition of the character ESC indirects to this keymap.") | |
296 | ||
297 | (defvar ctl-x-map nil | |
298 | "Default keymap for C-x commands. | |
299 | The normal global definition of the character C-x indirects to this keymap.") | |
300 | ||
301 | (defvar ctl-x-4-map (make-sparse-keymap) | |
302 | "Keymap for subcommands of C-x 4") | |
059184dd | 303 | (defalias 'ctl-x-4-prefix ctl-x-4-map) |
9a5336ae JB |
304 | (define-key ctl-x-map "4" 'ctl-x-4-prefix) |
305 | ||
306 | (defvar ctl-x-5-map (make-sparse-keymap) | |
307 | "Keymap for frame commands.") | |
059184dd | 308 | (defalias 'ctl-x-5-prefix ctl-x-5-map) |
9a5336ae JB |
309 | (define-key ctl-x-map "5" 'ctl-x-5-prefix) |
310 | ||
0f03054a | 311 | \f |
9a5336ae JB |
312 | ;;;; Event manipulation functions. |
313 | ||
114137b8 RS |
314 | ;; This code exists specifically to make sure that the |
315 | ;; resulting number does not appear in the .elc file. | |
316 | ;; The number is negative on most machines, but not on all! | |
317 | (defconst listify-key-sequence-1 | |
318 | (lsh 1 7)) | |
319 | (setq listify-key-sequence-1 (logior (lsh 1 23) listify-key-sequence-1)) | |
320 | ||
cde6d7e3 RS |
321 | (defun listify-key-sequence (key) |
322 | "Convert a key sequence to a list of events." | |
323 | (if (vectorp key) | |
324 | (append key nil) | |
325 | (mapcar (function (lambda (c) | |
326 | (if (> c 127) | |
114137b8 | 327 | (logxor c listify-key-sequence-1) |
cde6d7e3 RS |
328 | c))) |
329 | (append key nil)))) | |
330 | ||
53e5a4e8 RS |
331 | (defsubst eventp (obj) |
332 | "True if the argument is an event object." | |
333 | (or (integerp obj) | |
334 | (and (symbolp obj) | |
335 | (get obj 'event-symbol-elements)) | |
336 | (and (consp obj) | |
337 | (symbolp (car obj)) | |
338 | (get (car obj) 'event-symbol-elements)))) | |
339 | ||
340 | (defun event-modifiers (event) | |
341 | "Returns a list of symbols representing the modifier keys in event EVENT. | |
342 | The elements of the list may include `meta', `control', | |
32295976 RS |
343 | `shift', `hyper', `super', `alt', `click', `double', `triple', `drag', |
344 | and `down'." | |
53e5a4e8 RS |
345 | (let ((type event)) |
346 | (if (listp type) | |
347 | (setq type (car type))) | |
348 | (if (symbolp type) | |
349 | (cdr (get type 'event-symbol-elements)) | |
350 | (let ((list nil)) | |
351 | (or (zerop (logand type (lsh 1 23))) | |
352 | (setq list (cons 'meta list))) | |
353 | (or (and (zerop (logand type (lsh 1 22))) | |
354 | (>= (logand type 127) 32)) | |
355 | (setq list (cons 'control list))) | |
356 | (or (and (zerop (logand type (lsh 1 21))) | |
357 | (= (logand type 255) (downcase (logand type 255)))) | |
358 | (setq list (cons 'shift list))) | |
359 | (or (zerop (logand type (lsh 1 20))) | |
360 | (setq list (cons 'hyper list))) | |
361 | (or (zerop (logand type (lsh 1 19))) | |
362 | (setq list (cons 'super list))) | |
363 | (or (zerop (logand type (lsh 1 18))) | |
364 | (setq list (cons 'alt list))) | |
365 | list)))) | |
366 | ||
d63de416 RS |
367 | (defun event-basic-type (event) |
368 | "Returns the basic type of the given event (all modifiers removed). | |
369 | The value is an ASCII printing character (not upper case) or a symbol." | |
2b0f4ba5 JB |
370 | (if (consp event) |
371 | (setq event (car event))) | |
d63de416 RS |
372 | (if (symbolp event) |
373 | (car (get event 'event-symbol-elements)) | |
374 | (let ((base (logand event (1- (lsh 1 18))))) | |
375 | (downcase (if (< base 32) (logior base 64) base))))) | |
376 | ||
0f03054a RS |
377 | (defsubst mouse-movement-p (object) |
378 | "Return non-nil if OBJECT is a mouse movement event." | |
379 | (and (consp object) | |
380 | (eq (car object) 'mouse-movement))) | |
381 | ||
382 | (defsubst event-start (event) | |
383 | "Return the starting position of EVENT. | |
384 | If EVENT is a mouse press or a mouse click, this returns the location | |
385 | of the event. | |
386 | If EVENT is a drag, this returns the drag's starting position. | |
387 | The return value is of the form | |
e55c21be | 388 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a RS |
389 | The `posn-' functions access elements of such lists." |
390 | (nth 1 event)) | |
391 | ||
392 | (defsubst event-end (event) | |
393 | "Return the ending location of EVENT. EVENT should be a click or drag event. | |
394 | If EVENT is a click event, this function is the same as `event-start'. | |
395 | The return value is of the form | |
e55c21be | 396 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a | 397 | The `posn-' functions access elements of such lists." |
69b95560 | 398 | (nth (if (consp (nth 2 event)) 2 1) event)) |
0f03054a | 399 | |
32295976 RS |
400 | (defsubst event-click-count (event) |
401 | "Return the multi-click count of EVENT, a click or drag event. | |
402 | The return value is a positive integer." | |
403 | (if (integerp (nth 2 event)) (nth 2 event) 1)) | |
404 | ||
0f03054a RS |
405 | (defsubst posn-window (position) |
406 | "Return the window in POSITION. | |
407 | POSITION should be a list of the form | |
e55c21be | 408 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a RS |
409 | as returned by the `event-start' and `event-end' functions." |
410 | (nth 0 position)) | |
411 | ||
412 | (defsubst posn-point (position) | |
413 | "Return the buffer location in POSITION. | |
414 | POSITION should be a list of the form | |
e55c21be | 415 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a | 416 | as returned by the `event-start' and `event-end' functions." |
15db4e0e JB |
417 | (if (consp (nth 1 position)) |
418 | (car (nth 1 position)) | |
419 | (nth 1 position))) | |
0f03054a | 420 | |
e55c21be RS |
421 | (defsubst posn-x-y (position) |
422 | "Return the x and y coordinates in POSITION. | |
0f03054a | 423 | POSITION should be a list of the form |
e55c21be | 424 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a RS |
425 | as returned by the `event-start' and `event-end' functions." |
426 | (nth 2 position)) | |
427 | ||
ed627e08 | 428 | (defun posn-col-row (position) |
dbbcac56 | 429 | "Return the column and row in POSITION, measured in characters. |
e55c21be RS |
430 | POSITION should be a list of the form |
431 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) | |
ed627e08 RS |
432 | as returned by the `event-start' and `event-end' functions. |
433 | For a scroll-bar event, the result column is 0, and the row | |
434 | corresponds to the vertical position of the click in the scroll bar." | |
435 | (let ((pair (nth 2 position)) | |
436 | (window (posn-window position))) | |
dbbcac56 KH |
437 | (if (eq (if (consp (nth 1 position)) |
438 | (car (nth 1 position)) | |
439 | (nth 1 position)) | |
ed627e08 RS |
440 | 'vertical-scroll-bar) |
441 | (cons 0 (scroll-bar-scale pair (1- (window-height window)))) | |
dbbcac56 KH |
442 | (if (eq (if (consp (nth 1 position)) |
443 | (car (nth 1 position)) | |
444 | (nth 1 position)) | |
ed627e08 RS |
445 | 'horizontal-scroll-bar) |
446 | (cons (scroll-bar-scale pair (window-width window)) 0) | |
9ba60df9 RS |
447 | (let* ((frame (if (framep window) window (window-frame window))) |
448 | (x (/ (car pair) (frame-char-width frame))) | |
449 | (y (/ (cdr pair) (frame-char-height frame)))) | |
ed627e08 | 450 | (cons x y)))))) |
e55c21be | 451 | |
0f03054a RS |
452 | (defsubst posn-timestamp (position) |
453 | "Return the timestamp of POSITION. | |
454 | POSITION should be a list of the form | |
e55c21be | 455 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
f415c00c | 456 | as returned by the `event-start' and `event-end' functions." |
0f03054a | 457 | (nth 3 position)) |
9a5336ae | 458 | |
0f03054a | 459 | \f |
9a5336ae JB |
460 | ;;;; Obsolescent names for functions. |
461 | ||
059184dd ER |
462 | (defalias 'dot 'point) |
463 | (defalias 'dot-marker 'point-marker) | |
464 | (defalias 'dot-min 'point-min) | |
465 | (defalias 'dot-max 'point-max) | |
466 | (defalias 'window-dot 'window-point) | |
467 | (defalias 'set-window-dot 'set-window-point) | |
468 | (defalias 'read-input 'read-string) | |
469 | (defalias 'send-string 'process-send-string) | |
470 | (defalias 'send-region 'process-send-region) | |
471 | (defalias 'show-buffer 'set-window-buffer) | |
472 | (defalias 'buffer-flush-undo 'buffer-disable-undo) | |
473 | (defalias 'eval-current-buffer 'eval-buffer) | |
474 | (defalias 'compiled-function-p 'byte-code-function-p) | |
be9b65ac | 475 | |
9a5336ae JB |
476 | ;; Some programs still use this as a function. |
477 | (defun baud-rate () | |
bcacc42c RS |
478 | "Obsolete function returning the value of the `baud-rate' variable. |
479 | Please convert your programs to use the variable `baud-rate' directly." | |
9a5336ae JB |
480 | baud-rate) |
481 | ||
482 | \f | |
483 | ;;;; Alternate names for functions - these are not being phased out. | |
484 | ||
059184dd ER |
485 | (defalias 'string= 'string-equal) |
486 | (defalias 'string< 'string-lessp) | |
487 | (defalias 'move-marker 'set-marker) | |
488 | (defalias 'eql 'eq) | |
489 | (defalias 'not 'null) | |
490 | (defalias 'rplaca 'setcar) | |
491 | (defalias 'rplacd 'setcdr) | |
eb8c3be9 | 492 | (defalias 'beep 'ding) ;preserve lingual purity |
059184dd ER |
493 | (defalias 'indent-to-column 'indent-to) |
494 | (defalias 'backward-delete-char 'delete-backward-char) | |
495 | (defalias 'search-forward-regexp (symbol-function 're-search-forward)) | |
496 | (defalias 'search-backward-regexp (symbol-function 're-search-backward)) | |
497 | (defalias 'int-to-string 'number-to-string) | |
1e0a78a1 | 498 | (defalias 'set-match-data 'store-match-data) |
37f6661a JB |
499 | |
500 | ;;; Should this be an obsolete name? If you decide it should, you get | |
501 | ;;; to go through all the sources and change them. | |
059184dd | 502 | (defalias 'string-to-int 'string-to-number) |
be9b65ac | 503 | \f |
9a5336ae | 504 | ;;;; Hook manipulation functions. |
be9b65ac | 505 | |
be9b65ac DL |
506 | (defun run-hooks (&rest hooklist) |
507 | "Takes hook names and runs each one in turn. Major mode functions use this. | |
508 | Each argument should be a symbol, a hook variable. | |
509 | These symbols are processed in the order specified. | |
510 | If a hook symbol has a non-nil value, that value may be a function | |
511 | or a list of functions to be called to run the hook. | |
512 | If the value is a function, it is called with no arguments. | |
0e4d378b RS |
513 | If it is a list, the elements are called, in order, with no arguments. |
514 | ||
515 | To make a hook variable buffer-local, use `make-local-hook', not | |
516 | `make-local-variable'." | |
be9b65ac DL |
517 | (while hooklist |
518 | (let ((sym (car hooklist))) | |
519 | (and (boundp sym) | |
520 | (symbol-value sym) | |
521 | (let ((value (symbol-value sym))) | |
522 | (if (and (listp value) (not (eq (car value) 'lambda))) | |
0e4d378b RS |
523 | (while value |
524 | (if (eq (car value) t) | |
525 | ;; t indicates this hook has a local binding; | |
526 | ;; it means to run the global binding too. | |
527 | (let ((functions (default-value sym))) | |
528 | (while functions | |
529 | (funcall (car functions)) | |
530 | (setq functions (cdr functions)))) | |
531 | (funcall (car value))) | |
532 | (setq value (cdr value))) | |
be9b65ac DL |
533 | (funcall value))))) |
534 | (setq hooklist (cdr hooklist)))) | |
535 | ||
e8976c8a RS |
536 | (defun run-hook-with-args (hook &rest args) |
537 | "Run HOOK with the specified arguments ARGS. | |
538 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
539 | value, that value may be a function or a list of functions to be | |
540 | called to run the hook. If the value is a function, it is called with | |
541 | the given arguments and its return value is returned. If it is a list | |
542 | of functions, those functions are called, in order, | |
543 | with the given arguments ARGS. | |
544 | It is best not to depend on the value return by `run-hook-with-args', | |
0e4d378b RS |
545 | as that may change. |
546 | ||
547 | To make a hook variable buffer-local, use `make-local-hook', not | |
548 | `make-local-variable'." | |
e8976c8a RS |
549 | (and (boundp hook) |
550 | (symbol-value hook) | |
551 | (let ((value (symbol-value hook))) | |
552 | (if (and (listp value) (not (eq (car value) 'lambda))) | |
0e4d378b RS |
553 | (while value |
554 | (if (eq (car value) t) | |
555 | ;; t indicates this hook has a local binding; | |
556 | ;; it means to run the global binding too. | |
557 | (let ((functions (default-value hook))) | |
558 | (while functions | |
559 | (apply (car functions) args) | |
560 | (setq functions (cdr functions)))) | |
561 | (apply (car value) args)) | |
562 | (setq value (cdr value))) | |
e8976c8a RS |
563 | (apply value args))))) |
564 | ||
0e4d378b RS |
565 | (defun run-hook-with-args-until-success (hook &rest args) |
566 | "Run HOOK with the specified arguments ARGS. | |
567 | HOOK should be a symbol, a hook variable. Its value should | |
568 | be a list of functions. We call those functions, one by one, | |
569 | passing arguments ARGS to each of them, until one of them | |
570 | returns a non-nil value. Then we return that value. | |
571 | If all the functions return nil, we return nil. | |
572 | ||
573 | To make a hook variable buffer-local, use `make-local-hook', not | |
574 | `make-local-variable'." | |
575 | (and (boundp hook) | |
576 | (symbol-value hook) | |
577 | (let ((value (symbol-value hook)) | |
578 | success) | |
579 | (while (and value (not success)) | |
580 | (if (eq (car value) t) | |
581 | ;; t indicates this hook has a local binding; | |
582 | ;; it means to run the global binding too. | |
583 | (let ((functions (default-value hook))) | |
584 | (while (and functions (not success)) | |
585 | (setq success (apply (car functions) args)) | |
586 | (setq functions (cdr functions)))) | |
587 | (setq success (apply (car value) args))) | |
588 | (setq value (cdr value))) | |
589 | success))) | |
590 | ||
591 | (defun run-hook-with-args-until-failure (hook &rest args) | |
592 | "Run HOOK with the specified arguments ARGS. | |
593 | HOOK should be a symbol, a hook variable. Its value should | |
594 | be a list of functions. We call those functions, one by one, | |
595 | passing arguments ARGS to each of them, until one of them | |
596 | returns nil. Then we return nil. | |
597 | If all the functions return non-nil, we return non-nil. | |
598 | ||
599 | To make a hook variable buffer-local, use `make-local-hook', not | |
600 | `make-local-variable'." | |
601 | (and (boundp hook) | |
602 | (symbol-value hook) | |
603 | (let ((value (symbol-value hook)) | |
604 | (success t)) | |
605 | (while (and value success) | |
606 | (if (eq (car value) t) | |
607 | ;; t indicates this hook has a local binding; | |
608 | ;; it means to run the global binding too. | |
609 | (let ((functions (default-value hook))) | |
610 | (while (and functions success) | |
611 | (setq success (apply (car functions) args)) | |
612 | (setq functions (cdr functions)))) | |
613 | (setq success (apply (car value) args))) | |
614 | (setq value (cdr value))) | |
615 | success))) | |
616 | ||
be9b65ac DL |
617 | ;; Tell C code how to call this function. |
618 | (defconst run-hooks 'run-hooks | |
619 | "Variable by which C primitives find the function `run-hooks'. | |
620 | Don't change it.") | |
621 | ||
0e4d378b RS |
622 | (defun make-local-hook (hook) |
623 | "Make the hook HOOK local to the current buffer. | |
624 | When a hook is local, its local and global values | |
625 | work in concert: running the hook actually runs all the hook | |
626 | functions listed in *either* the local value *or* the global value | |
627 | of the hook variable. | |
628 | ||
629 | This function does nothing if HOOK is already local in the current buffer. | |
630 | ||
631 | Do not use `make-local-variable' to make a hook variable buffer-local." | |
632 | (if (local-variable-p hook) | |
633 | nil | |
634 | (or (boundp hook) (set hook nil)) | |
635 | (make-local-variable hook) | |
636 | (set hook (list t)))) | |
637 | ||
638 | (defun add-hook (hook function &optional append local) | |
32295976 RS |
639 | "Add to the value of HOOK the function FUNCTION. |
640 | FUNCTION is not added if already present. | |
641 | FUNCTION is added (if necessary) at the beginning of the hook list | |
642 | unless the optional argument APPEND is non-nil, in which case | |
643 | FUNCTION is added at the end. | |
644 | ||
0e4d378b RS |
645 | The optional fourth argument, LOCAL, if non-nil, says to modify |
646 | the hook's buffer-local value rather than its default value. | |
647 | This makes no difference if the hook is not buffer-local. | |
648 | To make a hook variable buffer-local, always use | |
649 | `make-local-hook', not `make-local-variable'. | |
650 | ||
32295976 RS |
651 | HOOK should be a symbol, and FUNCTION may be any valid function. If |
652 | HOOK is void, it is first set to nil. If HOOK's value is a single | |
aa09b5ca | 653 | function, it is changed to a list of functions." |
be9b65ac | 654 | (or (boundp hook) (set hook nil)) |
0e4d378b | 655 | (or (default-boundp hook) (set-default hook nil)) |
32295976 RS |
656 | ;; If the hook value is a single function, turn it into a list. |
657 | (let ((old (symbol-value hook))) | |
658 | (if (or (not (listp old)) (eq (car old) 'lambda)) | |
659 | (set hook (list old)))) | |
f4e5bca5 RS |
660 | (if (or local |
661 | ;; Detect the case where make-local-variable was used on a hook | |
662 | ;; and do what we used to do. | |
663 | (and (local-variable-p hook) | |
664 | (not (memq t (symbol-value hook))))) | |
0e4d378b RS |
665 | ;; Alter the local value only. |
666 | (or (if (consp function) | |
667 | (member function (symbol-value hook)) | |
668 | (memq function (symbol-value hook))) | |
669 | (set hook | |
670 | (if append | |
671 | (append (symbol-value hook) (list function)) | |
672 | (cons function (symbol-value hook))))) | |
673 | ;; Alter the global value (which is also the only value, | |
674 | ;; if the hook doesn't have a local value). | |
675 | (or (if (consp function) | |
676 | (member function (default-value hook)) | |
677 | (memq function (default-value hook))) | |
678 | (set-default hook | |
679 | (if append | |
680 | (append (default-value hook) (list function)) | |
681 | (cons function (default-value hook))))))) | |
682 | ||
683 | (defun remove-hook (hook function &optional local) | |
24980d16 RS |
684 | "Remove from the value of HOOK the function FUNCTION. |
685 | HOOK should be a symbol, and FUNCTION may be any valid function. If | |
686 | FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the | |
0e4d378b RS |
687 | list of hooks to run in HOOK, then nothing is done. See `add-hook'. |
688 | ||
689 | The optional third argument, LOCAL, if non-nil, says to modify | |
690 | the hook's buffer-local value rather than its default value. | |
691 | This makes no difference if the hook is not buffer-local. | |
692 | To make a hook variable buffer-local, always use | |
693 | `make-local-hook', not `make-local-variable'." | |
24980d16 | 694 | (if (or (not (boundp hook)) ;unbound symbol, or |
0e4d378b | 695 | (not (default-boundp 'hook)) |
24980d16 RS |
696 | (null (symbol-value hook)) ;value is nil, or |
697 | (null function)) ;function is nil, then | |
698 | nil ;Do nothing. | |
f4e5bca5 RS |
699 | (if (or local |
700 | ;; Detect the case where make-local-variable was used on a hook | |
701 | ;; and do what we used to do. | |
702 | (and (local-variable-p hook) | |
703 | (not (memq t (symbol-value hook))))) | |
0e4d378b RS |
704 | (let ((hook-value (symbol-value hook))) |
705 | (if (consp hook-value) | |
706 | (if (member function hook-value) | |
707 | (setq hook-value (delete function (copy-sequence hook-value)))) | |
708 | (if (equal hook-value function) | |
709 | (setq hook-value nil))) | |
710 | (set hook hook-value)) | |
711 | (let ((hook-value (default-value hook))) | |
712 | (if (consp hook-value) | |
713 | (if (member function hook-value) | |
714 | (setq hook-value (delete function (copy-sequence hook-value)))) | |
715 | (if (equal hook-value function) | |
716 | (setq hook-value nil))) | |
717 | (set-default hook hook-value))))) | |
6e3af630 RS |
718 | |
719 | (defun add-to-list (list-var element) | |
8851c1f0 RS |
720 | "Add to the value of LIST-VAR the element ELEMENT if it isn't there yet. |
721 | If you want to use `add-to-list' on a variable that is not defined | |
722 | until a certain package is loaded, you should put the call to `add-to-list' | |
723 | into a hook function that will be run only after loading the package. | |
724 | `eval-after-load' provides one way to do this. In some cases | |
725 | other hooks, such as major mode hooks, can do the job." | |
6e3af630 RS |
726 | (or (member element (symbol-value list-var)) |
727 | (set list-var (cons element (symbol-value list-var))))) | |
be9b65ac | 728 | \f |
9a5336ae JB |
729 | ;;;; Specifying things to do after certain files are loaded. |
730 | ||
731 | (defun eval-after-load (file form) | |
732 | "Arrange that, if FILE is ever loaded, FORM will be run at that time. | |
733 | This makes or adds to an entry on `after-load-alist'. | |
12c7071c | 734 | It does nothing if FORM is already on the list for FILE. |
9a5336ae JB |
735 | FILE should be the name of a library, with no directory name." |
736 | (or (assoc file after-load-alist) | |
737 | (setq after-load-alist (cons (list file) after-load-alist))) | |
12c7071c RS |
738 | (let ((elt (assoc file after-load-alist))) |
739 | (or (member form (cdr elt)) | |
740 | (nconc elt (list form)))) | |
9a5336ae JB |
741 | form) |
742 | ||
743 | (defun eval-next-after-load (file) | |
744 | "Read the following input sexp, and run it whenever FILE is loaded. | |
745 | This makes or adds to an entry on `after-load-alist'. | |
746 | FILE should be the name of a library, with no directory name." | |
747 | (eval-after-load file (read))) | |
748 | ||
749 | \f | |
750 | ;;;; Input and display facilities. | |
751 | ||
752 | (defun read-quoted-char (&optional prompt) | |
753 | "Like `read-char', except that if the first character read is an octal | |
754 | digit, we read up to two more octal digits and return the character | |
755 | represented by the octal number consisting of those digits. | |
756 | Optional argument PROMPT specifies a string to use to prompt the user." | |
757 | (let ((count 0) (code 0) char) | |
758 | (while (< count 3) | |
759 | (let ((inhibit-quit (zerop count)) | |
760 | (help-form nil)) | |
761 | (and prompt (message "%s-" prompt)) | |
762 | (setq char (read-char)) | |
763 | (if inhibit-quit (setq quit-flag nil))) | |
764 | (cond ((null char)) | |
765 | ((and (<= ?0 char) (<= char ?7)) | |
766 | (setq code (+ (* code 8) (- char ?0)) | |
767 | count (1+ count)) | |
768 | (and prompt (message (setq prompt | |
769 | (format "%s %c" prompt char))))) | |
770 | ((> count 0) | |
771 | (setq unread-command-events (list char) count 259)) | |
772 | (t (setq code char count 259)))) | |
0342b545 RS |
773 | ;; Turn a meta-character into a character with the 0200 bit set. |
774 | (logior (if (/= (logand code (lsh 1 23)) 0) 128 0) | |
775 | (logand 255 code)))) | |
9a5336ae JB |
776 | |
777 | (defun force-mode-line-update (&optional all) | |
778 | "Force the mode-line of the current buffer to be redisplayed. | |
7ec2a18c | 779 | With optional non-nil ALL, force redisplay of all mode-lines." |
9a5336ae JB |
780 | (if all (save-excursion (set-buffer (other-buffer)))) |
781 | (set-buffer-modified-p (buffer-modified-p))) | |
782 | ||
be9b65ac DL |
783 | (defun momentary-string-display (string pos &optional exit-char message) |
784 | "Momentarily display STRING in the buffer at POS. | |
785 | Display remains until next character is typed. | |
786 | If the char is EXIT-CHAR (optional third arg, default is SPC) it is swallowed; | |
787 | otherwise it is then available as input (as a command if nothing else). | |
788 | Display MESSAGE (optional fourth arg) in the echo area. | |
789 | If MESSAGE is nil, instructions to type EXIT-CHAR are displayed there." | |
790 | (or exit-char (setq exit-char ?\ )) | |
791 | (let ((buffer-read-only nil) | |
ca2ec1c5 RS |
792 | ;; Don't modify the undo list at all. |
793 | (buffer-undo-list t) | |
be9b65ac DL |
794 | (modified (buffer-modified-p)) |
795 | (name buffer-file-name) | |
796 | insert-end) | |
797 | (unwind-protect | |
798 | (progn | |
799 | (save-excursion | |
800 | (goto-char pos) | |
801 | ;; defeat file locking... don't try this at home, kids! | |
802 | (setq buffer-file-name nil) | |
803 | (insert-before-markers string) | |
3eec84bf RS |
804 | (setq insert-end (point)) |
805 | ;; If the message end is off screen, recenter now. | |
806 | (if (> (window-end) insert-end) | |
807 | (recenter (/ (window-height) 2))) | |
808 | ;; If that pushed message start off the screen, | |
809 | ;; scroll to start it at the top of the screen. | |
810 | (move-to-window-line 0) | |
811 | (if (> (point) pos) | |
812 | (progn | |
813 | (goto-char pos) | |
814 | (recenter 0)))) | |
be9b65ac DL |
815 | (message (or message "Type %s to continue editing.") |
816 | (single-key-description exit-char)) | |
3547c855 | 817 | (let ((char (read-event))) |
be9b65ac | 818 | (or (eq char exit-char) |
dbc4e1c1 | 819 | (setq unread-command-events (list char))))) |
be9b65ac DL |
820 | (if insert-end |
821 | (save-excursion | |
822 | (delete-region pos insert-end))) | |
823 | (setq buffer-file-name name) | |
824 | (set-buffer-modified-p modified)))) | |
825 | ||
9a5336ae JB |
826 | \f |
827 | ;;;; Miscellanea. | |
828 | ||
f9269e19 RS |
829 | (defun ignore (&rest ignore) |
830 | "Do nothing and return nil. | |
831 | This function accepts any number of arguments, but ignores them." | |
c0f1a4f6 | 832 | (interactive) |
9a5336ae JB |
833 | nil) |
834 | ||
835 | (defun error (&rest args) | |
836 | "Signal an error, making error message by passing all args to `format'." | |
837 | (while t | |
838 | (signal 'error (list (apply 'format args))))) | |
839 | ||
cef7ae6e | 840 | (defalias 'user-original-login-name 'user-login-name) |
9a5336ae | 841 | |
be9b65ac DL |
842 | (defun start-process-shell-command (name buffer &rest args) |
843 | "Start a program in a subprocess. Return the process object for it. | |
844 | Args are NAME BUFFER COMMAND &rest COMMAND-ARGS. | |
845 | NAME is name for process. It is modified if necessary to make it unique. | |
846 | BUFFER is the buffer or (buffer-name) to associate with the process. | |
847 | Process output goes at end of that buffer, unless you specify | |
848 | an output stream or filter function to handle the output. | |
849 | BUFFER may be also nil, meaning that this process is not associated | |
850 | with any buffer | |
851 | Third arg is command name, the name of a shell command. | |
852 | Remaining arguments are the arguments for the command. | |
4f1d6310 | 853 | Wildcards and redirection are handled as usual in the shell." |
a247bf21 KH |
854 | (cond |
855 | ((eq system-type 'vax-vms) | |
856 | (apply 'start-process name buffer args)) | |
b59f6d7a RS |
857 | ;; We used to use `exec' to replace the shell with the command, |
858 | ;; but that failed to handle (...) and semicolon, etc. | |
a247bf21 KH |
859 | (t |
860 | (start-process name buffer shell-file-name shell-command-switch | |
b59f6d7a | 861 | (mapconcat 'identity args " "))))) |
be9b65ac | 862 | |
9a5336ae JB |
863 | (defmacro save-match-data (&rest body) |
864 | "Execute the BODY forms, restoring the global value of the match data." | |
865 | (let ((original (make-symbol "match-data"))) | |
866 | (list | |
867 | 'let (list (list original '(match-data))) | |
868 | (list 'unwind-protect | |
869 | (cons 'progn body) | |
870 | (list 'store-match-data original))))) | |
ffd56f97 | 871 | |
8af7df60 RS |
872 | (defun shell-quote-argument (argument) |
873 | "Quote an argument for passing as argument to an inferior shell." | |
874 | ;; Quote everything except POSIX filename characters. | |
875 | ;; This should be safe enough even for really weird shells. | |
876 | (let ((result "") (start 0) end) | |
26add1bf | 877 | (while (string-match "[^-0-9a-zA-Z_./]" argument start) |
8af7df60 RS |
878 | (setq end (match-beginning 0) |
879 | result (concat result (substring argument start end) | |
880 | "\\" (substring argument end (1+ end))) | |
881 | start (1+ end))) | |
882 | (concat result (substring argument start)))) | |
883 | ||
297d863b | 884 | (defun make-syntax-table (&optional oldtable) |
984f718a RS |
885 | "Return a new syntax table. |
886 | It inherits all letters and control characters from the standard | |
887 | syntax table; other characters are copied from the standard syntax table." | |
297d863b KH |
888 | (if oldtable |
889 | (copy-syntax-table oldtable) | |
890 | (let ((table (copy-syntax-table)) | |
891 | i) | |
892 | (setq i 0) | |
893 | (while (<= i 31) | |
894 | (aset table i 13) | |
895 | (setq i (1+ i))) | |
896 | (setq i ?A) | |
897 | (while (<= i ?Z) | |
898 | (aset table i 13) | |
899 | (setq i (1+ i))) | |
900 | (setq i ?a) | |
901 | (while (<= i ?z) | |
902 | (aset table i 13) | |
903 | (setq i (1+ i))) | |
904 | (setq i 128) | |
905 | (while (<= i 255) | |
906 | (aset table i 13) | |
907 | (setq i (1+ i))) | |
908 | table))) | |
984f718a | 909 | |
9a5336ae JB |
910 | ;; now in fns.c |
911 | ;(defun nth (n list) | |
912 | ; "Returns the Nth element of LIST. | |
913 | ;N counts from zero. If LIST is not that long, nil is returned." | |
914 | ; (car (nthcdr n list))) | |
915 | ; | |
916 | ;(defun copy-alist (alist) | |
917 | ; "Return a copy of ALIST. | |
918 | ;This is a new alist which represents the same mapping | |
919 | ;from objects to objects, but does not share the alist structure with ALIST. | |
920 | ;The objects mapped (cars and cdrs of elements of the alist) | |
921 | ;are shared, however." | |
922 | ; (setq alist (copy-sequence alist)) | |
923 | ; (let ((tail alist)) | |
924 | ; (while tail | |
925 | ; (if (consp (car tail)) | |
926 | ; (setcar tail (cons (car (car tail)) (cdr (car tail))))) | |
927 | ; (setq tail (cdr tail)))) | |
928 | ; alist) | |
630cc463 ER |
929 | |
930 | ;;; subr.el ends here | |
9a5336ae | 931 |