1 ;;; poe.el --- Portable Outfit for Emacsen
3 ;; Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
6 ;; Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
7 ;; Keywords: emulation, compatibility, Nemacs, MULE, Emacs/mule, XEmacs
9 ;; This file is part of APEL (A Portable Emacs Library).
11 ;; This program is free software; you can redistribute it and/or
12 ;; modify it under the terms of the GNU General Public License as
13 ;; published by the Free Software Foundation; either version 2, or (at
14 ;; your option) any later version.
16 ;; This program is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
31 (product-provide (provide 'poe) (require 'apel-ver))
36 ;;; @ Version information.
39 (static-when (= emacs-major-version 18)
42 ;; Some ancient version of XEmacs did not provide 'xemacs.
43 (static-when (string-match "XEmacs" emacs-version)
46 ;; `file-coding' was appeared in the spring of 1998, just before XEmacs
47 ;; 21.0. Therefore it is not provided in XEmacs with MULE versions 20.4
49 (static-when (featurep 'xemacs)
50 ;; must be load-time check to share .elc between w/ MULE and w/o MULE.
51 (when (featurep 'mule)
52 (provide 'file-coding)))
54 (static-when (featurep 'xemacs)
55 (require 'poe-xemacs))
57 ;; must be load-time check to share .elc between different systems.
58 (or (fboundp 'open-network-stream)
62 ;;; @ C primitives emulation.
65 ;; Emacs 20.3 and earlier: (require FEATURE &optional FILENAME)
66 ;; Emacs 20.4 and later: (require FEATURE &optional FILENAME NOERROR)
67 (static-condition-case nil
68 ;; compile-time check.
70 (require 'nofeature "nofile" 'noerror)
71 (if (get 'require 'defun-maybe)
72 (error "`require' is already redefined")))
75 (or (fboundp 'si:require)
77 (fset 'si:require (symbol-function 'require))
78 (defun require (feature &optional filename noerror)
80 If feature FEATURE is not loaded, load it from FILENAME.
81 If FEATURE is not a member of the list `features', then the feature
82 is not loaded; so load the file FILENAME.
83 If FILENAME is omitted, the printname of FEATURE is used as the file name,
84 but in this case `load' insists on adding the suffix `.el' or `.elc'.
85 If the optional third argument NOERROR is non-nil,
86 then return nil if the file is not found.
87 Normally the return value is FEATURE."
90 (si:require feature filename)
92 (si:require feature filename)))
93 ;; for `load-history'.
94 (setq current-load-list (cons 'require current-load-list))
95 (put 'require 'defun-maybe t)))))
97 ;; Emacs 19.29 and later: (plist-get PLIST PROP)
98 ;; (defun-maybe plist-get (plist prop)
100 ;; (not (eq (car plist) prop)))
101 ;; (setq plist (cdr (cdr plist))))
102 ;; (car (cdr plist)))
103 (static-unless (and (fboundp 'plist-get)
104 (not (get 'plist-get 'defun-maybe)))
105 (or (fboundp 'plist-get)
107 (defvar plist-get-internal-symbol)
108 (defun plist-get (plist prop)
110 Extract a value from a property list.
111 PLIST is a property list, which is a list of the form
112 \(PROP1 VALUE1 PROP2 VALUE2...\). This function returns the value
113 corresponding to the given PROP, or nil if PROP is not
114 one of the properties on the list."
115 (setplist 'plist-get-internal-symbol plist)
116 (get 'plist-get-internal-symbol prop))
117 ;; for `load-history'.
118 (setq current-load-list (cons 'plist-get current-load-list))
119 (put 'plist-get 'defun-maybe t))))
121 ;; Emacs 19.29 and later: (plist-put PLIST PROP VAL)
122 ;; (defun-maybe plist-put (plist prop val)
124 ;; (let ((tail plist)
126 ;; (while (and tail (cdr tail))
127 ;; (if (eq (car tail) prop)
129 ;; (setcar (cdr tail) val)
130 ;; (throw 'found plist))
132 ;; tail (cdr (cdr tail)))))
135 ;; (setcdr (cdr prev) (list prop val))
137 ;; (list prop val)))))
138 (static-unless (and (fboundp 'plist-put)
139 (not (get 'plist-put 'defun-maybe)))
140 (or (fboundp 'plist-put)
142 (defvar plist-put-internal-symbol)
143 (defun plist-put (plist prop val)
145 Change value in PLIST of PROP to VAL.
146 PLIST is a property list, which is a list of the form
147 \(PROP1 VALUE1 PROP2 VALUE2 ...\). PROP is a symbol and VAL is any object.
148 If PROP is already a property on the list, its value is set to VAL,
149 otherwise the new PROP VAL pair is added. The new plist is returned;
150 use `\(setq x \(plist-put x prop val\)\)' to be sure to use the new value.
151 The PLIST is modified by side effects."
152 (setplist 'plist-put-internal-symbol plist)
153 (put 'plist-put-internal-symbol prop val)
154 (symbol-plist 'plist-put-internal-symbol))
155 ;; for `load-history'.
156 (setq current-load-list (cons 'plist-put current-load-list))
157 (put 'plist-put 'defun-maybe t))))
159 ;; Emacs 19.23 and later: (minibuffer-prompt-width)
160 (defun-maybe minibuffer-prompt-width ()
161 "Return the display width of the minibuffer prompt."
163 (set-buffer (window-buffer (minibuffer-window)))
166 ;; (read-string PROMPT &optional INITIAL-INPUT HISTORY)
167 ;; Emacs 19.29/XEmacs 19.14(?) and later takes optional 3rd arg HISTORY.
168 (static-unless (or (featurep 'xemacs)
169 (>= emacs-major-version 20)
170 (and (= emacs-major-version 19)
171 (>= emacs-minor-version 29)))
172 (or (fboundp 'si:read-string)
174 (fset 'si:read-string (symbol-function 'read-string))
175 (defun read-string (prompt &optional initial-input history)
177 Read a string from the minibuffer, prompting with string PROMPT.
178 If non-nil, second arg INITIAL-INPUT is a string to insert before reading.
179 The third arg HISTORY, is dummy for compatibility.
180 See `read-from-minibuffer' for details of HISTORY argument."
181 (si:read-string prompt initial-input)))))
183 ;; (completing-read prompt table &optional
185 ;; --19.7 : predicate require-match init
186 ;; 19.7 --19.34 : predicate require-match init hist
187 ;; 20.1 -- : predicate require-match init hist def inherit-input-method
189 ;; --19.(?): predicate require-match init
190 ;; --21.2 : predicate require-match init hist
191 ;; 21.2 -- : predicate require-match init hist def
194 ;; We support following API.
195 ;; (completing-read prompt table
196 ;; &optional predicate require-match init hist def)
198 ;; add 'hist' and 'def' argument.
199 ((< emacs-major-version 19)
200 (or (fboundp 'si:completing-read)
202 (fset 'si:completing-read (symbol-function 'completing-read))
203 (defun completing-read
204 (prompt table &optional predicate require-match init
206 "Read a string in the minibuffer, with completion.
207 PROMPT is a string to prompt with; normally it ends in a colon and a space.
208 TABLE is an alist whose elements' cars are strings, or an obarray.
209 PREDICATE limits completion to a subset of TABLE.
210 See `try-completion' and `all-completions' for more details
211 on completion, TABLE, and PREDICATE.
213 If REQUIRE-MATCH is non-nil, the user is not allowed to exit unless
214 the input is (or completes to) an element of TABLE or is null.
215 If it is also not t, Return does not exit if it does non-null completion.
216 If the input is null, `completing-read' returns an empty string,
217 regardless of the value of REQUIRE-MATCH.
219 If INIT is non-nil, insert it in the minibuffer initially.
220 If it is (STRING . POSITION), the initial input
221 is STRING, but point is placed POSITION characters into the string.
222 HIST is ignored in this implementation.
223 DEF, if non-nil, is the default value.
225 Completion ignores case if the ambient value of
226 `completion-ignore-case' is non-nil."
227 (let ((string (si:completing-read prompt table predicate
228 require-match init)))
229 (if (and (string= string "") def)
231 ;; add 'def' argument.
232 ((or (and (featurep 'xemacs)
233 (or (and (eq emacs-major-version 21)
234 (< emacs-minor-version 2))
235 (< emacs-major-version 21)))
236 (< emacs-major-version 20))
237 (or (fboundp 'si:completing-read)
239 (fset 'si:completing-read (symbol-function 'completing-read))
240 (defun completing-read
241 (prompt table &optional predicate require-match init
243 "Read a string in the minibuffer, with completion.
244 PROMPT is a string to prompt with; normally it ends in a colon and a space.
245 TABLE is an alist whose elements' cars are strings, or an obarray.
246 PREDICATE limits completion to a subset of TABLE.
247 See `try-completion' and `all-completions' for more details
248 on completion, TABLE, and PREDICATE.
250 If REQUIRE-MATCH is non-nil, the user is not allowed to exit unless
251 the input is (or completes to) an element of TABLE or is null.
252 If it is also not t, Return does not exit if it does non-null completion.
253 If the input is null, `completing-read' returns an empty string,
254 regardless of the value of REQUIRE-MATCH.
256 If INIT is non-nil, insert it in the minibuffer initially.
257 If it is (STRING . POSITION), the initial input
258 is STRING, but point is placed POSITION characters into the string.
259 HIST, if non-nil, specifies a history list
260 and optionally the initial position in the list.
261 It can be a symbol, which is the history list variable to use,
262 or it can be a cons cell (HISTVAR . HISTPOS).
263 In that case, HISTVAR is the history list variable to use,
264 and HISTPOS is the initial position (the position in the list
265 which INIT corresponds to).
266 Positions are counted starting from 1 at the beginning of the list.
267 DEF, if non-nil, is the default value.
269 Completion ignores case if the ambient value of
270 `completion-ignore-case' is non-nil."
271 (let ((string (si:completing-read prompt table predicate
272 require-match init hist)))
273 (if (and (string= string "") def)
276 ;; v18: (string-to-int STRING)
277 ;; v19: (string-to-number STRING)
278 ;; v20: (string-to-number STRING &optional BASE)
280 ;; XXX: `string-to-number' of Emacs 20.3 and earlier is broken.
281 ;; (string-to-number "1e1" 16) => 10.0, should be 481.
282 (static-condition-case nil
283 ;; compile-time check.
284 (if (= (string-to-number "1e1" 16) 481)
285 (if (get 'string-to-number 'defun-maybe)
286 (error "`string-to-number' is already redefined"))
287 (error "`string-to-number' is broken"))
290 (or (fboundp 'si:string-to-number)
292 (if (fboundp 'string-to-number)
293 (fset 'si:string-to-number (symbol-function 'string-to-number))
294 (fset 'si:string-to-number (symbol-function 'string-to-int))
295 ;; XXX: In v18, this causes infinite loop while bytecompiling.
296 ;; (defalias 'string-to-int 'string-to-number)
298 (put 'string-to-number 'defun-maybe t)
299 (defun string-to-number (string &optional base)
301 Convert STRING to a number by parsing it as a decimal number.
302 This parses both integers and floating point numbers.
303 It ignores leading spaces and tabs.
305 If BASE, interpret STRING as a number in that base. If BASE isn't
306 present, base 10 is used. BASE must be between 2 and 16 (inclusive).
307 If the base used is not 10, floating point is not recognized."
308 (if (or (null base) (= base 10))
309 (si:string-to-number string)
310 (if (or (< base 2)(> base 16))
311 (signal 'args-out-of-range (cons base nil)))
312 (let ((len (length string))
314 ;; skip leading whitespace.
315 (while (and (< pos len)
316 (memq (aref string pos) '(?\ ?\t)))
320 (let ((number 0)(negative 1)
322 (if (eq (aref string pos) ?-)
325 (if (eq (aref string pos) ?+)
326 (setq pos (1+ pos))))
327 (while (and (< pos len)
328 (setq chr (aref string pos)
330 ((and (<= ?0 chr)(<= chr ?9))
332 ((and (<= ?A chr)(<= chr ?F))
334 ((and (<= ?a chr)(<= chr ?f))
338 (setq number (+ (* number base) num)
340 (* negative number))))))))))
342 ;; Emacs 20.1 and 20.2: (concat-chars &rest CHARS)
343 ;; Emacs 20.3/XEmacs 21.0 and later: (string &rest CHARS)
345 ((and (fboundp 'string)
346 (subrp (symbol-function 'string)))
347 ;; Emacs 20.3/XEmacs 21.0 and later.
349 ((and (fboundp 'concat-chars)
350 (subrp (symbol-function 'concat-chars)))
351 ;; Emacs 20.1 and 20.2.
352 (defalias 'string 'concat-chars))
354 ;; Use `defun-maybe' to update `load-history'.
355 (defun-maybe string (&rest chars)
356 "Concatenate all the argument characters and make the result a string."
357 ;; We cannot use (apply 'concat chars) here because `concat' does not
358 ;; work with multibyte chars on Mule 1.* and 2.*.
359 (mapconcat (function char-to-string) chars ""))))
361 ;; Mule: (char-before POS)
362 ;; v20: (char-before &optional POS)
363 (static-condition-case nil
364 ;; compile-time check.
367 (if (get 'char-before 'defun-maybe)
368 (error "`char-before' is already defined")))
369 (wrong-number-of-arguments ; Mule.
371 (or (fboundp 'si:char-before)
373 (fset 'si:char-before (symbol-function 'char-before))
374 (put 'char-before 'defun-maybe t)
375 ;; takes IGNORED for backward compatibility.
376 (defun char-before (&optional pos ignored)
378 Return character in current buffer preceding position POS.
379 POS is an integer or a buffer pointer.
380 If POS is out of range, the value is nil."
381 (si:char-before (or pos (point)))))))
382 (void-function ; non-Mule.
384 (defun-maybe char-before (&optional pos)
386 Return character in current buffer preceding position POS.
387 POS is an integer or a buffer pointer.
388 If POS is out of range, the value is nil."
391 (and (= (goto-char pos) (point))
396 (error ; found our definition at compile-time.
400 (wrong-number-of-arguments ; Mule.
401 (or (fboundp 'si:char-before)
403 (fset 'si:char-before (symbol-function 'char-before))
404 (put 'char-before 'defun-maybe t)
405 ;; takes IGNORED for backward compatibility.
406 (defun char-before (&optional pos ignored)
408 Return character in current buffer preceding position POS.
409 POS is an integer or a buffer pointer.
410 If POS is out of range, the value is nil."
411 (si:char-before (or pos (point)))))))
412 (void-function ; non-Mule.
413 (defun-maybe char-before (&optional pos)
415 Return character in current buffer preceding position POS.
416 POS is an integer or a buffer pointer.
417 If POS is out of range, the value is nil."
420 (and (= (goto-char pos) (point))
424 (preceding-char))))))))
426 ;; v18, v19: (char-after POS)
427 ;; v20: (char-after &optional POS)
428 (static-condition-case nil
429 ;; compile-time check.
432 (if (get 'char-after 'defun-maybe)
433 (error "`char-after' is already redefined")))
434 (wrong-number-of-arguments ; v18, v19
436 (or (fboundp 'si:char-after)
438 (fset 'si:char-after (symbol-function 'char-after))
439 (put 'char-after 'defun-maybe t)
440 (defun char-after (&optional pos)
442 Return character in current buffer at position POS.
443 POS is an integer or a buffer pointer.
444 If POS is out of range, the value is nil."
445 (si:char-after (or pos (point)))))))
446 (void-function ; NEVER happen?
448 (defun-maybe char-after (&optional pos)
450 Return character in current buffer at position POS.
451 POS is an integer or a buffer pointer.
452 If POS is out of range, the value is nil."
455 (and (= (goto-char pos) (point))
460 (error ; found our definition at compile-time.
464 (wrong-number-of-arguments ; v18, v19
465 (or (fboundp 'si:char-after)
467 (fset 'si:char-after (symbol-function 'char-after))
468 (put 'char-after 'defun-maybe t)
469 (defun char-after (&optional pos)
471 Return character in current buffer at position POS.
472 POS is an integer or a buffer pointer.
473 If POS is out of range, the value is nil."
474 (si:char-after (or pos (point)))))))
475 (void-function ; NEVER happen?
476 (defun-maybe char-after (&optional pos)
478 Return character in current buffer at position POS.
479 POS is an integer or a buffer pointer.
480 If POS is out of range, the value is nil."
483 (and (= (goto-char pos) (point))
487 (following-char))))))))
489 ;; Emacs 19.29 and later: (buffer-substring-no-properties START END)
490 (defun-maybe buffer-substring-no-properties (start end)
491 "Return the characters of part of the buffer, without the text properties.
492 The two arguments START and END are character positions;
493 they can be in either order."
494 (let ((string (buffer-substring start end)))
495 (set-text-properties 0 (length string) nil string)
498 ;; Emacs 19.31 and later: (buffer-live-p OBJECT)
499 (defun-maybe buffer-live-p (object)
500 "Return non-nil if OBJECT is a buffer which has not been killed.
501 Value is nil if OBJECT is not a buffer or if it has been killed."
504 (buffer-name (get-buffer object))
507 ;; Emacs 20: (line-beginning-position &optional N)
508 (defun-maybe line-beginning-position (&optional n)
509 "Return the character position of the first character on the current line.
510 With argument N not nil or 1, move forward N - 1 lines first.
511 If scan reaches end of buffer, return that position.
512 This function does not move point."
514 (forward-line (1- (or n 1)))
517 ;; Emacs 20: (line-end-position &optional N)
518 (defun-maybe line-end-position (&optional n)
519 "Return the character position of the last character on the current line.
520 With argument N not nil or 1, move forward N - 1 lines first.
521 If scan reaches end of buffer, return that position.
522 This function does not move point."
524 (end-of-line (or n 1))
527 ;; FSF Emacs 19.29 and later
528 ;; (read-file-name PROMPT &optional DIR DEFAULT-FILENAME MUSTMATCH INITIAL)
529 ;; XEmacs 19.14 and later:
530 ;; (read-file-name (PROMPT &optional DIR DEFAULT MUST-MATCH INITIAL-CONTENTS
533 ;; In FSF Emacs 19.28 and earlier (except for v18) or XEmacs 19.13 and
534 ;; earlier, this function is incompatible with the other Emacsen.
535 ;; For instance, if DEFAULT-FILENAME is nil, INITIAL is not and user
536 ;; enters a null string, it returns the visited file name of the current
537 ;; buffer if it is non-nil.
539 ;; It does not assimilate the different numbers of the optional arguments
540 ;; on various Emacsen (yet).
542 ((and (not (featurep 'xemacs))
543 (eq emacs-major-version 19)
544 (< emacs-minor-version 29))
545 (if (fboundp 'si:read-file-name)
547 (fset 'si:read-file-name (symbol-function 'read-file-name))
548 (defun read-file-name (prompt &optional dir default-filename mustmatch
550 "Read file name, prompting with PROMPT and completing in directory DIR.
551 Value is not expanded---you must call `expand-file-name' yourself.
552 Default name to DEFAULT-FILENAME if user enters a null string.
553 (If DEFAULT-FILENAME is omitted, the visited file name is used,
554 except that if INITIAL is specified, that combined with DIR is used.)
555 Fourth arg MUSTMATCH non-nil means require existing file's name.
556 Non-nil and non-t means also require confirmation after completion.
557 Fifth arg INITIAL specifies text to start with.
558 DIR defaults to current buffer's directory default."
559 (si:read-file-name prompt dir
562 (expand-file-name initial dir)))
563 mustmatch initial))))
564 ((and (featurep 'xemacs)
565 (eq emacs-major-version 19)
566 (< emacs-minor-version 14))
567 (if (fboundp 'si:read-file-name)
569 (fset 'si:read-file-name (symbol-function 'read-file-name))
570 (defun read-file-name (prompt &optional dir default must-match
571 initial-contents history)
572 "Read file name, prompting with PROMPT and completing in directory DIR.
573 This will prompt with a dialog box if appropriate, according to
574 `should-use-dialog-box-p'.
575 Value is not expanded---you must call `expand-file-name' yourself.
576 Value is subject to interpreted by substitute-in-file-name however.
577 Default name to DEFAULT if user enters a null string.
578 (If DEFAULT is omitted, the visited file name is used,
579 except that if INITIAL-CONTENTS is specified, that combined with DIR is
581 Fourth arg MUST-MATCH non-nil means require existing file's name.
582 Non-nil and non-t means also require confirmation after completion.
583 Fifth arg INITIAL-CONTENTS specifies text to start with.
584 Sixth arg HISTORY specifies the history list to use. Default is
586 DIR defaults to current buffer's directory default."
587 (si:read-file-name prompt dir
590 (expand-file-name initial-contents dir)))
591 must-match initial-contents history)))))
594 ;;; @ Basic lisp subroutines emulation. (lisp/subr.el)
597 ;;; @@ Lisp language features.
599 (defmacro-maybe push (newelt listname)
600 "Add NEWELT to the list stored in the symbol LISTNAME.
601 This is equivalent to (setq LISTNAME (cons NEWELT LISTNAME)).
602 LISTNAME must be a symbol."
604 (list 'cons newelt listname)))
606 (defmacro-maybe pop (listname)
607 "Return the first element of LISTNAME's value, and remove it from the list.
608 LISTNAME must be a symbol whose value is a list.
609 If the value is nil, `pop' returns nil but does not actually
611 (list 'prog1 (list 'car listname)
612 (list 'setq listname (list 'cdr listname))))
614 (defmacro-maybe when (cond &rest body)
615 "If COND yields non-nil, do BODY, else return nil."
616 (list 'if cond (cons 'progn body)))
617 ;; (def-edebug-spec when (&rest form))
619 (defmacro-maybe unless (cond &rest body)
620 "If COND yields nil, do BODY, else return nil."
621 (cons 'if (cons cond (cons nil body))))
622 ;; (def-edebug-spec unless (&rest form))
624 (defsubst-maybe caar (x)
625 "Return the car of the car of X."
628 (defsubst-maybe cadr (x)
629 "Return the car of the cdr of X."
632 (defsubst-maybe cdar (x)
633 "Return the cdr of the car of X."
636 (defsubst-maybe cddr (x)
637 "Return the cdr of the cdr of X."
640 (defun-maybe last (x &optional n)
641 "Return the last link of the list X. Its car is the last element.
642 If X is nil, return nil.
643 If N is non-nil, return the Nth-to-last link of X.
644 If N is bigger than the length of X, return X."
648 (setq m (1+ m) p (cdr p)))
650 (if (< n m) (nthcdr (- m n) x) x)))
655 ;; Actually, `butlast' and `nbutlast' are defined in lisp/cl.el.
656 (defun-maybe butlast (x &optional n)
657 "Returns a copy of LIST with the last N elements removed."
658 (if (and n (<= n 0)) x
659 (nbutlast (copy-sequence x) n)))
661 (defun-maybe nbutlast (x &optional n)
662 "Modifies LIST to remove the last N elements."
663 (let ((m (length x)))
667 (if (> n 0) (setcdr (nthcdr (- (1- m) n) x) nil))
670 ;; Emacs 20.3 and later: (assoc-default KEY ALIST &optional TEST DEFAULT)
671 (defun-maybe assoc-default (key alist &optional test default)
672 "Find object KEY in a pseudo-alist ALIST.
673 ALIST is a list of conses or objects. Each element (or the element's car,
674 if it is a cons) is compared with KEY by evaluating (TEST (car elt) KEY).
675 If that is non-nil, the element matches;
676 then `assoc-default' returns the element's cdr, if it is a cons,
677 or DEFAULT if the element is not a cons.
679 If no element matches, the value is nil.
680 If TEST is omitted or nil, `equal' is used."
681 (let (found (tail alist) value)
682 (while (and tail (not found))
683 (let ((elt (car tail)))
684 (when (funcall (or test 'equal) (if (consp elt) (car elt) elt) key)
685 (setq found t value (if (consp elt) (cdr elt) default))))
686 (setq tail (cdr tail)))
689 ;; The following two function use `compare-strings', which we don't
691 ;; (defun assoc-ignore-case (key alist))
692 ;; (defun assoc-ignore-representation (key alist))
694 ;; Emacs 19.29/XEmacs 19.13 and later: (rassoc KEY LIST)
695 ;; Actually, `rassoc' is defined in src/fns.c.
696 (defun-maybe rassoc (key list)
697 "Return non-nil if KEY is `equal' to the cdr of an element of LIST.
698 The value is actually the element of LIST whose cdr equals KEY.
699 Elements of LIST that are not conses are ignored."
702 (cond ((not (consp (car list))))
703 ((equal (cdr (car list)) key)
704 (throw 'found (car list))))
705 (setq list (cdr list)))))
707 ;; XEmacs 19.13 and later: (remassq KEY LIST)
708 (defun-maybe remassq (key list)
709 "Delete by side effect any elements of LIST whose car is `eq' to KEY.
710 The modified LIST is returned. If the first member of LIST has a car
711 that is `eq' to KEY, there is no way to remove it by side effect;
712 therefore, write `(setq foo (remassq key foo))' to be sure of changing
714 (if (setq key (assq key list))
718 ;; XEmacs 19.13 and later: (remassoc KEY LIST)
719 (defun-maybe remassoc (key list)
720 "Delete by side effect any elements of LIST whose car is `equal' to KEY.
721 The modified LIST is returned. If the first member of LIST has a car
722 that is `equal' to KEY, there is no way to remove it by side effect;
723 therefore, write `(setq foo (remassoc key foo))' to be sure of changing
725 (if (setq key (assoc key list))
729 ;; XEmacs 19.13 and later: (remrassq VALUE LIST)
730 (defun-maybe remrassq (value list)
731 "Delete by side effect any elements of LIST whose cdr is `eq' to VALUE.
732 The modified LIST is returned. If the first member of LIST has a car
733 that is `eq' to VALUE, there is no way to remove it by side effect;
734 therefore, write `(setq foo (remrassq value foo))' to be sure of changing
736 (if (setq value (rassq value list))
740 ;; XEmacs 19.13 and later: (remrassoc VALUE LIST)
741 (defun-maybe remrassoc (value list)
742 "Delete by side effect any elements of LIST whose cdr is `equal' to VALUE.
743 The modified LIST is returned. If the first member of LIST has a car
744 that is `equal' to VALUE, there is no way to remove it by side effect;
745 therefore, write `(setq foo (remrassoc value foo))' to be sure of changing
747 (if (setq value (rassoc value list))
751 ;;; Define `functionp' here because "localhook" uses it.
753 ;; Emacs 20.1/XEmacs 20.3 (but first appeared in Epoch?): (functionp OBJECT)
754 (defun-maybe functionp (object)
755 "Non-nil if OBJECT is a type of object that can be called as a function."
756 (or (subrp object) (byte-code-function-p object)
757 (eq (car-safe object) 'lambda)
758 (and (symbolp object) (fboundp object))))
760 ;;; @@ Hook manipulation functions.
762 ;; "localhook" package is written for Emacs 19.28 and earlier.
763 ;; `run-hooks' was a lisp function in Emacs 19.29 and earlier.
764 ;; So, in Emacs 19.29, `run-hooks' and others will be overrided.
765 ;; But, who cares it?
766 (static-unless (subrp (symbol-function 'run-hooks))
767 (require 'localhook))
769 ;; Emacs 19.29/XEmacs 19.14(?) and later: (add-to-list LIST-VAR ELEMENT)
770 (defun-maybe add-to-list (list-var element)
771 "Add to the value of LIST-VAR the element ELEMENT if it isn't there yet.
772 The test for presence of ELEMENT is done with `equal'.
773 If you want to use `add-to-list' on a variable that is not defined
774 until a certain package is loaded, you should put the call to `add-to-list'
775 into a hook function that will be run only after loading the package.
776 `eval-after-load' provides one way to do this. In some cases
777 other hooks, such as major mode hooks, can do the job."
778 (or (member element (symbol-value list-var))
779 (set list-var (cons element (symbol-value list-var)))))
781 ;; (eval-after-load FILE FORM)
782 ;; Emacs 19.28 and earlier do not evaluate FORM if FILE is already loaded.
783 ;; XEmacs 20.2 and earlier have `after-load-alist', but refuse to support
784 ;; `eval-after-load'. (see comments in XEmacs/lisp/subr.el.)
787 ;; for XEmacs 20.2 and earlier.
788 (defun-maybe eval-after-load (file form)
789 "Arrange that, if FILE is ever loaded, FORM will be run at that time.
790 This makes or adds to an entry on `after-load-alist'.
791 If FILE is already loaded, evaluate FORM right now.
792 It does nothing if FORM is already on the list for FILE.
793 FILE should be the name of a library, with no directory name."
794 ;; Make sure there is an element for FILE.
795 (or (assoc file after-load-alist)
796 (setq after-load-alist (cons (list file) after-load-alist)))
797 ;; Add FORM to the element if it isn't there.
798 (let ((elt (assoc file after-load-alist)))
799 (or (member form (cdr elt))
801 (nconc elt (list form))
802 ;; If the file has been loaded already, run FORM right away.
803 (and (assoc file load-history)
806 ((>= emacs-major-version 20))
807 ((and (= emacs-major-version 19)
808 (< emacs-minor-version 29))
809 ;; for Emacs 19.28 and earlier.
810 (defun eval-after-load (file form)
811 "Arrange that, if FILE is ever loaded, FORM will be run at that time.
812 This makes or adds to an entry on `after-load-alist'.
813 If FILE is already loaded, evaluate FORM right now.
814 It does nothing if FORM is already on the list for FILE.
815 FILE should be the name of a library, with no directory name."
816 ;; Make sure there is an element for FILE.
817 (or (assoc file after-load-alist)
818 (setq after-load-alist (cons (list file) after-load-alist)))
819 ;; Add FORM to the element if it isn't there.
820 (let ((elt (assoc file after-load-alist)))
821 (or (member form (cdr elt))
823 (nconc elt (list form))
824 ;; If the file has been loaded already, run FORM right away.
825 (and (assoc file load-history)
829 ;; should emulate for v18?
832 (defun-maybe eval-next-after-load (file)
833 "Read the following input sexp, and run it whenever FILE is loaded.
834 This makes or adds to an entry on `after-load-alist'.
835 FILE should be the name of a library, with no directory name."
836 (eval-after-load file (read)))
838 ;;; @@ Input and display facilities.
840 ;; XXX: (defun read-passwd (prompt &optional confirm default))
844 ;; Avoid compiler warnings about this variable,
845 ;; which has a special meaning on certain system types.
846 (defvar-maybe buffer-file-type nil
847 "Non-nil if the visited file is a binary file.
848 This variable is meaningful on MS-DOG and Windows NT.
849 On those systems, it is automatically local in every buffer.
850 On other systems, this variable is normally always nil.")
852 ;; Emacs 20.1/XEmacs 20.3(?) and later: (save-current-buffer &rest BODY)
854 ;; v20 defines `save-current-buffer' as a C primitive (in src/editfns.c)
855 ;; and introduces a new bytecode Bsave_current_buffer(_1), replacing an
856 ;; obsolete bytecode Bread_char. To make things worse, Emacs 20.1 and
857 ;; 20.2 have a bug that it will restore the current buffer without
858 ;; confirming that it is alive.
860 ;; This is a source of incompatibility of .elc between v18/v19 and v20.
861 ;; (XEmacs compiler takes care of it if compatibility mode is enabled.)
862 (defmacro-maybe save-current-buffer (&rest body)
863 "Save the current buffer; execute BODY; restore the current buffer.
864 Executes BODY just like `progn'."
865 (` (let ((orig-buffer (current-buffer)))
868 (if (buffer-live-p orig-buffer)
869 (set-buffer orig-buffer))))))
871 ;; Emacs 20.1/XEmacs 20.3(?) and later: (with-current-buffer BUFFER &rest BODY)
872 (defmacro-maybe with-current-buffer (buffer &rest body)
873 "Execute the forms in BODY with BUFFER as the current buffer.
874 The value returned is the value of the last form in BODY.
875 See also `with-temp-buffer'."
876 (` (save-current-buffer
877 (set-buffer (, buffer))
880 ;; Emacs 20.1/XEmacs 20.3(?) and later: (with-temp-file FILE &rest FORMS)
881 (defmacro-maybe with-temp-file (file &rest forms)
882 "Create a new buffer, evaluate FORMS there, and write the buffer to FILE.
883 The value of the last form in FORMS is returned, like `progn'.
884 See also `with-temp-buffer'."
885 (let ((temp-file (make-symbol "temp-file"))
886 (temp-buffer (make-symbol "temp-buffer")))
887 (` (let (((, temp-file) (, file))
889 (get-buffer-create (generate-new-buffer-name " *temp file*"))))
892 (with-current-buffer (, temp-buffer)
894 (with-current-buffer (, temp-buffer)
896 (write-region (point-min) (point-max) (, temp-file) nil 0)))
897 (and (buffer-name (, temp-buffer))
898 (kill-buffer (, temp-buffer))))))))
900 ;; Emacs 20.4 and later: (with-temp-message MESSAGE &rest BODY)
901 ;; This macro uses `current-message', which appears in v20.
902 (static-when (and (fboundp 'current-message)
903 (subrp (symbol-function 'current-message)))
904 (defmacro-maybe with-temp-message (message &rest body)
906 Display MESSAGE temporarily if non-nil while BODY is evaluated.
907 The original message is restored to the echo area after BODY has finished.
908 The value returned is the value of the last form in BODY.
909 MESSAGE is written to the message log buffer if `message-log-max' is non-nil.
910 If MESSAGE is nil, the echo area and message log buffer are unchanged.
911 Use a MESSAGE of \"\" to temporarily clear the echo area."
912 (let ((current-message (make-symbol "current-message"))
913 (temp-message (make-symbol "with-temp-message")))
914 (` (let (((, temp-message) (, message))
915 ((, current-message)))
918 (when (, temp-message)
919 (setq (, current-message) (current-message))
920 (message "%s" (, temp-message))
922 (and (, temp-message) (, current-message)
923 (message "%s" (, current-message))))))))))
925 ;; Emacs 20.1/XEmacs 20.3(?) and later: (with-temp-buffer &rest FORMS)
926 (defmacro-maybe with-temp-buffer (&rest forms)
927 "Create a temporary buffer, and evaluate FORMS there like `progn'.
928 See also `with-temp-file' and `with-output-to-string'."
929 (let ((temp-buffer (make-symbol "temp-buffer")))
930 (` (let (((, temp-buffer)
931 (get-buffer-create (generate-new-buffer-name " *temp*"))))
933 (with-current-buffer (, temp-buffer)
935 (and (buffer-name (, temp-buffer))
936 (kill-buffer (, temp-buffer))))))))
938 ;; Emacs 20.1/XEmacs 20.3(?) and later: (with-output-to-string &rest BODY)
939 (defmacro-maybe with-output-to-string (&rest body)
940 "Execute BODY, return the text it sent to `standard-output', as a string."
941 (` (let ((standard-output
942 (get-buffer-create (generate-new-buffer-name " *string-output*"))))
943 (let ((standard-output standard-output))
945 (with-current-buffer standard-output
948 (kill-buffer nil))))))
950 ;; Emacs 20.1 and later: (combine-after-change-calls &rest BODY)
951 (defmacro-maybe combine-after-change-calls (&rest body)
952 "Execute BODY, but don't call the after-change functions till the end.
953 If BODY makes changes in the buffer, they are recorded
954 and the functions on `after-change-functions' are called several times
955 when BODY is finished.
956 The return value is the value of the last form in BODY.
958 If `before-change-functions' is non-nil, then calls to the after-change
959 functions can't be deferred, so in that case this macro has no effect.
961 Do not alter `after-change-functions' or `before-change-functions'
964 This emulating macro does not support after-change functions at all,
968 ;; Emacs 19.29/XEmacs 19.14(?) and later: (match-string NUM &optional STRING)
969 (defun-maybe match-string (num &optional string)
970 "Return string of text matched by last search.
971 NUM specifies which parenthesized expression in the last regexp.
972 Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
973 Zero means the entire text matched by the whole regexp or whole string.
974 STRING should be given if the last search was by `string-match' on STRING."
975 (if (match-beginning num)
977 (substring string (match-beginning num) (match-end num))
978 (buffer-substring (match-beginning num) (match-end num)))))
980 ;; Emacs 20.3 and later: (match-string-no-properties NUM &optional STRING)
981 (defun-maybe match-string-no-properties (num &optional string)
982 "Return string of text matched by last search, without text properties.
983 NUM specifies which parenthesized expression in the last regexp.
984 Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
985 Zero means the entire text matched by the whole regexp or whole string.
986 STRING should be given if the last search was by `string-match' on STRING."
987 (if (match-beginning num)
990 (substring string (match-beginning num) (match-end num))))
991 (set-text-properties 0 (length result) nil result)
993 (buffer-substring-no-properties (match-beginning num)
996 ;; Emacs 19.28 and earlier
997 ;; (replace-match NEWTEXT &optional FIXEDCASE LITERAL)
998 ;; Emacs 20.x (?) and later
999 ;; (replace-match NEWTEXT &optional FIXEDCASE LITERAL STRING SUBEXP)
1001 ;; (replace-match NEWTEXT &optional FIXEDCASE LITERAL STRING STRBUFFER)
1002 ;; We support following API.
1003 ;; (replace-match NEWTEXT &optional FIXEDCASE LITERAL STRING)
1004 (static-condition-case nil
1005 ;; compile-time check
1007 (string-match "" "")
1008 (replace-match "" nil nil "")
1009 (if (get 'replace-match 'defun-maybe)
1010 (error "`replace-match' is already defined")))
1011 (wrong-number-of-arguments ; Emacs 19.28 and earlier
1013 (or (fboundp 'si:replace-match)
1015 (fset 'si:replace-match (symbol-function 'replace-match))
1016 (put 'replace-match 'defun-maybe t)
1017 (defun replace-match (newtext &optional fixedcase literal string)
1018 "Replace text matched by last search with NEWTEXT.
1019 If second arg FIXEDCASE is non-nil, do not alter case of replacement text.
1020 Otherwise maybe capitalize the whole text, or maybe just word initials,
1021 based on the replaced text.
1022 If the replaced text has only capital letters
1023 and has at least one multiletter word, convert NEWTEXT to all caps.
1024 If the replaced text has at least one word starting with a capital letter,
1025 then capitalize each word in NEWTEXT.
1027 If third arg LITERAL is non-nil, insert NEWTEXT literally.
1028 Otherwise treat `\' as special:
1029 `\&' in NEWTEXT means substitute original matched text.
1030 `\N' means substitute what matched the Nth `\(...\)'.
1031 If Nth parens didn't match, substitute nothing.
1032 `\\' means insert one `\'.
1033 FIXEDCASE and LITERAL are optional arguments.
1034 Leaves point at end of replacement text.
1036 The optional fourth argument STRING can be a string to modify.
1037 In that case, this function creates and returns a new string
1038 which is made by replacing the part of STRING that was matched."
1043 (let* ((matched (match-data))
1044 (beg (nth 0 matched))
1045 (end (nth 1 matched)))
1049 (move-marker beg (1+ (match-beginning 0)))
1050 (1+ (match-beginning 0)))
1052 (move-marker end (1+ (match-end 0)))
1053 (1+ (match-end 0))))))
1054 (si:replace-match newtext fixedcase literal)
1056 (si:replace-match newtext fixedcase literal))))))
1057 (error ; found our definition at compile-time.
1061 (string-match "" "")
1062 (replace-match "" nil nil ""))
1063 (wrong-number-of-arguments ; Emacs 19.28 and earlier
1065 (or (fboundp 'si:replace-match)
1067 (fset 'si:replace-match (symbol-function 'replace-match))
1068 (put 'replace-match 'defun-maybe t)
1069 (defun replace-match (newtext &optional fixedcase literal string)
1070 "Replace text matched by last search with NEWTEXT.
1071 If second arg FIXEDCASE is non-nil, do not alter case of replacement text.
1072 Otherwise maybe capitalize the whole text, or maybe just word initials,
1073 based on the replaced text.
1074 If the replaced text has only capital letters
1075 and has at least one multiletter word, convert NEWTEXT to all caps.
1076 If the replaced text has at least one word starting with a capital letter,
1077 then capitalize each word in NEWTEXT.
1079 If third arg LITERAL is non-nil, insert NEWTEXT literally.
1080 Otherwise treat `\' as special:
1081 `\&' in NEWTEXT means substitute original matched text.
1082 `\N' means substitute what matched the Nth `\(...\)'.
1083 If Nth parens didn't match, substitute nothing.
1084 `\\' means insert one `\'.
1085 FIXEDCASE and LITERAL are optional arguments.
1086 Leaves point at end of replacement text.
1088 The optional fourth argument STRING can be a string to modify.
1089 In that case, this function creates and returns a new string
1090 which is made by replacing the part of STRING that was matched."
1095 (let* ((matched (match-data))
1096 (beg (nth 0 matched))
1097 (end (nth 1 matched)))
1101 (move-marker beg (1+ (match-beginning 0)))
1102 (1+ (match-beginning 0)))
1104 (move-marker end (1+ (match-end 0)))
1105 (1+ (match-end 0))))))
1106 (si:replace-match newtext fixedcase literal)
1108 (si:replace-match newtext fixedcase literal)))))))))
1110 ;; Emacs 20: (format-time-string)
1111 ;; The the third optional argument universal is yet to be implemented.
1112 ;; Those format constructs are yet to be implemented.
1113 ;; %c, %C, %j, %U, %W, %x, %X
1114 ;; Not fully compatible especially when invalid format is specified.
1115 (static-unless (and (fboundp 'format-time-string)
1116 (not (get 'format-time-string 'defun-maybe)))
1117 (or (fboundp 'format-time-string)
1119 (defconst format-time-month-list
1120 '(( "Zero" . ("Zero" . 0))
1121 ("Jan" . ("January" . 1)) ("Feb" . ("February" . 2))
1122 ("Mar" . ("March" . 3)) ("Apr" . ("April" . 4)) ("May" . ("May" . 5))
1123 ("Jun" . ("June" . 6))("Jul" . ("July" . 7)) ("Aug" . ("August" . 8))
1124 ("Sep" . ("September" . 9)) ("Oct" . ("October" . 10))
1125 ("Nov" . ("November" . 11)) ("Dec" . ("December" . 12)))
1126 "Alist of months and their number.")
1128 (defconst format-time-week-list
1129 '(("Sun" . ("Sunday" . 0)) ("Mon" . ("Monday" . 1))
1130 ("Tue" . ("Tuesday" . 2)) ("Wed" . ("Wednesday" . 3))
1131 ("Thu" . ("Thursday" . 4)) ("Fri" . ("Friday" . 5))
1132 ("Sat" . ("Saturday" . 6)))
1133 "Alist of weeks and their number.")
1135 (defun format-time-string (format &optional time universal)
1136 "Use FORMAT-STRING to format the time TIME, or now if omitted.
1137 TIME is specified as (HIGH LOW . IGNORED) or (HIGH . LOW), as returned by
1138 `current-time' or `file-attributes'.
1139 The third, optional, argument UNIVERSAL, if non-nil, means describe TIME
1140 as Universal Time; nil means describe TIME in the local time zone.
1141 The value is a copy of FORMAT-STRING, but with certain constructs replaced
1142 by text that describes the specified date and time in TIME:
1144 %Y is the year, %y within the century, %C the century.
1145 %G is the year corresponding to the ISO week, %g within the century.
1146 %m is the numeric month.
1147 %b and %h are the locale's abbreviated month name, %B the full name.
1148 %d is the day of the month, zero-padded, %e is blank-padded.
1149 %u is the numeric day of week from 1 (Monday) to 7, %w from 0 (Sunday) to 6.
1150 %a is the locale's abbreviated name of the day of week, %A the full name.
1151 %U is the week number starting on Sunday, %W starting on Monday,
1152 %V according to ISO 8601.
1153 %j is the day of the year.
1155 %H is the hour on a 24-hour clock, %I is on a 12-hour clock, %k is like %H
1156 only blank-padded, %l is like %I blank-padded.
1157 %p is the locale's equivalent of either AM or PM.
1160 %Z is the time zone name, %z is the numeric form.
1161 %s is the number of seconds since 1970-01-01 00:00:00 +0000.
1163 %c is the locale's date and time format.
1164 %x is the locale's \"preferred\" date format.
1165 %D is like \"%m/%d/%y\".
1167 %R is like \"%H:%M\", %T is like \"%H:%M:%S\", %r is like \"%I:%M:%S %p\".
1168 %X is the locale's \"preferred\" time format.
1170 Finally, %n is a newline, %t is a tab, %% is a literal %.
1172 Certain flags and modifiers are available with some format controls.
1173 The flags are `_' and `-'. For certain characters X, %_X is like %X,
1174 but padded with blanks; %-X is like %X, but without padding.
1175 %NX (where N stands for an integer) is like %X,
1176 but takes up at least N (a number) positions.
1177 The modifiers are `E' and `O'. For certain characters X,
1178 %EX is a locale's alternative version of %X;
1179 %OX is like %X, but uses the locale's number symbols.
1181 For example, to produce full ISO 8601 format, use \"%Y-%m-%dT%T%z\".
1185 The the third optional argument universal is yet to be implemented.
1186 Those format constructs are yet to be implemented.
1187 %c, %C, %j, %U, %W, %x, %X
1188 Not fully compatible especially when invalid format is specified."
1189 (let ((fmt-len (length format))
1198 pad-left change-case
1201 (time-string (current-time-string time)))
1202 (setq hour (string-to-int (substring time-string 11 13)))
1203 (while (< ind fmt-len)
1204 (setq cur-char (aref format ind))
1210 ;; eat any additional args to allow for future expansion, not!!
1211 (setq pad-left nil change-case nil field-width "" prev-ind ind
1216 (setq cur-char (if (< ind fmt-len)
1219 (or (eq ?- cur-char) ; pad on left
1220 (eq ?# cur-char) ; case change
1221 (if (and (string-equal field-width "")
1222 (<= ?0 cur-char) (>= ?9 cur-char))
1224 (let ((field-index ind))
1227 (setq cur-char (if (< ind fmt-len)
1230 (and (<= ?0 cur-char) (>= ?9 cur-char))))
1232 (substring format field-index ind))
1236 (setq prev-char cur-char
1237 strings-so-far (concat strings-so-far
1239 (char-to-string cur-char)
1241 ;; characters we actually use
1242 (cond ((eq cur-char ?-)
1243 ;; padding to left must be specified before field-width
1244 (setq pad-left (string-equal field-width "")))
1246 (setq change-case t))))
1251 ;; the abbreviated name of the day of week.
1253 (substring time-string 0 3))
1254 ;; the full name of the day of week
1256 (cadr (assoc (substring time-string 0 3)
1257 format-time-week-list)))
1258 ;; the abbreviated name of the month
1260 (substring time-string 4 7))
1261 ;; the full name of the month
1263 (cadr (assoc (substring time-string 4 7)
1264 format-time-month-list)))
1265 ;; a synonym for `%x %X' (yet to come)
1268 ;; locale specific (yet to come)
1271 ;; the day of month, zero-padded
1273 (format "%02d" (string-to-int (substring time-string 8 10))))
1274 ;; a synonym for `%m/%d/%y'
1276 (format "%02d/%02d/%s"
1277 (cddr (assoc (substring time-string 4 7)
1278 format-time-month-list))
1279 (string-to-int (substring time-string 8 10))
1280 (substring time-string -2)))
1281 ;; the day of month, blank-padded
1283 (format "%2d" (string-to-int (substring time-string 8 10))))
1284 ;; a synonym for `%b'
1286 (substring time-string 4 7))
1289 (substring time-string 11 13))
1292 (format "%02d" (if (> hour 12) (- hour 12) hour)))
1293 ;; the day of the year (001-366) (yet to come)
1296 ;; the hour (0-23), blank padded
1298 (format "%2d" hour))
1299 ;; the hour (1-12), blank padded
1301 (format "%2d" (if (> hour 12) (- hour 12) hour)))
1302 ;; the month (01-12)
1304 (format "%02d" (cddr (assoc (substring time-string 4 7)
1305 format-time-month-list))))
1306 ;; the minute (00-59)
1308 (substring time-string 14 16))
1312 ;; `AM' or `PM', as appropriate
1314 (setq change-case (not change-case))
1315 (if (> hour 12) "pm" "am"))
1316 ;; a synonym for `%I:%M:%S %p'
1318 (format "%02d:%s:%s %s"
1319 (if (> hour 12) (- hour 12) hour)
1320 (substring time-string 14 16)
1321 (substring time-string 17 19)
1322 (if (> hour 12) "PM" "AM")))
1323 ;; a synonym for `%H:%M'
1326 (substring time-string 11 13)
1327 (substring time-string 14 16)))
1328 ;; the seconds (00-60)
1330 (substring time-string 17 19))
1334 ;; a synonym for `%H:%M:%S'
1337 (substring time-string 11 13)
1338 (substring time-string 14 16)
1339 (substring time-string 17 19)))
1340 ;; the week of the year (01-52), assuming that weeks
1341 ;; start on Sunday (yet to come)
1344 ;; the numeric day of week (0-6). Sunday is day 0
1346 (format "%d" (cddr (assoc (substring time-string 0 3)
1347 format-time-week-list))))
1348 ;; the week of the year (01-52), assuming that weeks
1349 ;; start on Monday (yet to come)
1352 ;; locale specific (yet to come)
1355 ;; locale specific (yet to come)
1358 ;; the year without century (00-99)
1360 (substring time-string -2))
1361 ;; the year with century
1363 (substring time-string -4))
1364 ;; the time zone abbreviation
1366 (setq change-case (not change-case))
1367 (downcase (cadr (current-time-zone))))
1372 (char-to-string cur-char)))))
1373 ; (setq ind prev-ind)
1374 ; (throw 'invalid "%"))))
1375 (if (string-equal field-width "")
1376 (if change-case (upcase field-result) field-result)
1377 (let ((padded-result
1378 (format (format "%%%s%s%c"
1379 "" ; pad on left is ignored
1380 ; (if pad-left "-" "")
1383 (or field-result ""))))
1384 (let ((initial-length (length padded-result))
1385 (desired-length (string-to-int field-width)))
1386 (when (and (string-match "^0" field-width)
1387 (string-match "^ +" padded-result))
1391 (length (match-string 0 padded-result)) ?0)
1392 nil nil padded-result)))
1393 (if (> initial-length desired-length)
1394 ;; truncate strings on right, years on left
1395 (if (stringp field-result)
1396 (substring padded-result 0 desired-length)
1397 (if (eq cur-char ?y)
1398 (substring padded-result (- desired-length))
1399 padded-result))) ;non-year numbers don't truncate
1400 (if change-case (upcase padded-result) padded-result))))) ;)
1402 (char-to-string cur-char)))))
1403 (setq ind (1+ ind)))
1405 ;; for `load-history'.
1406 (setq current-load-list (cons 'format-time-string current-load-list))
1407 (put 'format-time-string 'defun-maybe t))))
1409 ;; Emacs 20.1/XEmacs 20.3(?) and later: (split-string STRING &optional PATTERN)
1410 ;; Here is a XEmacs version.
1411 (defun-maybe split-string (string &optional pattern)
1412 "Return a list of substrings of STRING which are separated by PATTERN.
1413 If PATTERN is omitted, it defaults to \"[ \\f\\t\\n\\r\\v]+\"."
1415 (setq pattern "[ \f\t\n\r\v]+"))
1416 ;; The FSF version of this function takes care not to cons in case
1417 ;; of infloop. Maybe we should synch?
1418 (let (parts (start 0))
1419 (while (string-match pattern string start)
1420 (setq parts (cons (substring string start (match-beginning 0)) parts)
1421 start (match-end 0)))
1422 (nreverse (cons (substring string start) parts))))
1425 ;;; @ Window commands emulation. (lisp/window.el)
1428 (defmacro-maybe save-selected-window (&rest body)
1429 "Execute BODY, then select the window that was selected before BODY."
1431 '((save-selected-window-window (selected-window)))
1432 (list 'unwind-protect
1434 (list 'select-window 'save-selected-window-window))))
1436 ;; Emacs 19.31 and later:
1437 ;; (get-buffer-window-list &optional BUFFER MINIBUF FRAME)
1438 (defun-maybe get-buffer-window-list (buffer &optional minibuf frame)
1439 "Return windows currently displaying BUFFER, or nil if none.
1440 See `walk-windows' for the meaning of MINIBUF and FRAME."
1441 (let ((buffer (if (bufferp buffer) buffer (get-buffer buffer))) windows)
1443 (function (lambda (window)
1444 (if (eq (window-buffer window) buffer)
1445 (setq windows (cons window windows)))))
1450 ;;; @ Frame commands emulation. (lisp/frame.el)
1453 ;; XEmacs 21.0 and later:
1454 ;; (save-selected-frame &rest BODY)
1455 (defmacro-maybe save-selected-frame (&rest body)
1456 "Execute forms in BODY, then restore the selected frame."
1458 '((save-selected-frame-frame (selected-frame)))
1459 (list 'unwind-protect
1461 (list 'select-frame 'save-selected-frame-frame))))
1464 ;;; @ Basic editing commands emulation. (lisp/simple.el)
1468 ;;; @ File input and output commands emulation. (lisp/files.el)
1471 (defvar-maybe temporary-file-directory
1472 (file-name-as-directory
1473 (cond ((memq system-type '(ms-dos windows-nt))
1474 (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp"))
1475 ((memq system-type '(vax-vms axp-vms))
1476 (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:"))
1478 (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp"))))
1479 "The directory for writing temporary files.")
1481 ;; Actually, `path-separator' is defined in src/emacs.c and overrided
1483 (defvar-maybe path-separator ":"
1484 "The directory separator in search paths, as a string.")
1486 ;; `convert-standard-filename' is defined in lisp/files.el and overrided
1487 ;; in lisp/dos-fns.el and lisp/w32-fns.el for each environment.
1489 ;; must be load-time check to share .elc between different systems.
1490 ((fboundp 'convert-standard-filename))
1491 ((memq system-type '(windows-nt ms-dos))
1492 ;; should we do (require 'filename) at load-time ?
1493 ;; (require 'filename)
1494 ;; filename.el requires many modules, so we do not want to load it
1495 ;; at compile-time. Instead, suppress warnings by these autoloads.
1497 (autoload 'filename-maybe-truncate-by-size "filename")
1498 (autoload 'filename-special-filter "filename"))
1499 (defun convert-standard-filename (filename)
1500 "Convert a standard file's name to something suitable for the current OS.
1501 This function's standard definition is trivial; it just returns the argument.
1502 However, on some systems, the function is redefined
1503 with a definition that really does change some file names.
1504 Under `windows-nt' or `ms-dos', it refers `filename-replacement-alist' and
1505 `filename-limit-length' for the basic filename and each parent directory name."
1507 (let* ((names (split-string filename "/"))
1508 (drive-name (car names))
1511 (filename-maybe-truncate-by-size
1512 (filename-special-filter string))))))
1514 ((eq 1 (length names))
1515 (funcall filter drive-name))
1516 ((string-match "^[^/]:$" drive-name)
1517 (concat drive-name "/" (mapconcat filter (cdr names) "/")))
1519 (mapconcat filter names "/"))))))
1521 (defun convert-standard-filename (filename)
1522 "Convert a standard file's name to something suitable for the current OS.
1523 This function's standard definition is trivial; it just returns the argument.
1524 However, on some systems, the function is redefined
1525 with a definition that really does change some file names.
1526 Under `windows-nt' or `ms-dos', it refers `filename-replacement-alist' and
1527 `filename-limit-length' for the basic filename and each parent directory name."
1531 ((fboundp 'insert-file-contents-literally))
1532 ((boundp 'file-name-handler-alist)
1533 ;; Use `defun-maybe' to update `load-history'.
1534 (defun-maybe insert-file-contents-literally (filename &optional visit
1536 "Like `insert-file-contents', q.v., but only reads in the file.
1537 A buffer may be modified in several ways after reading into the buffer due
1538 to advanced Emacs features, such as file-name-handlers, format decoding,
1539 find-file-hooks, etc.
1540 This function ensures that none of these modifications will take place."
1541 (let (file-name-handler-alist)
1542 (insert-file-contents filename visit beg end replace))))
1544 (defalias 'insert-file-contents-literally 'insert-file-contents)))
1546 (defun-maybe file-name-sans-extension (filename)
1547 "Return FILENAME sans final \"extension\".
1548 The extension, in a file name, is the part that follows the last `.'."
1550 (let ((file (file-name-sans-versions (file-name-nondirectory filename)))
1552 (if (string-match "\\.[^.]*\\'" file)
1553 (if (setq directory (file-name-directory filename))
1554 (expand-file-name (substring file 0 (match-beginning 0))
1556 (substring file 0 (match-beginning 0)))
1560 ;;; @ XEmacs emulation.
1563 (defun-maybe find-face (face-or-name)
1564 "Retrieve the face of the given name.
1565 If FACE-OR-NAME is a face object, it is simply returned.
1566 Otherwise, FACE-OR-NAME should be a symbol. If there is no such face,
1567 nil is returned. Otherwise the associated face object is returned."
1568 (car (memq face-or-name (face-list))))
1570 ;; Emacs 21.1 defines this as an alias for `line-beginning-position'.
1571 ;; Therefore, optional 2nd arg BUFFER is not portable.
1572 (defun-maybe point-at-bol (&optional n buffer)
1573 "Return the character position of the first character on the current line.
1574 With argument N not nil or 1, move forward N - 1 lines first.
1575 If scan reaches end of buffer, return that position.
1576 This function does not move point."
1578 (if buffer (set-buffer buffer))
1579 (forward-line (1- (or n 1)))
1582 ;; Emacs 21.1 defines this as an alias for `line-end-position'.
1583 ;; Therefore, optional 2nd arg BUFFER is not portable.
1584 (defun-maybe point-at-eol (&optional n buffer)
1585 "Return the character position of the last character on the current line.
1586 With argument N not nil or 1, move forward N - 1 lines first.
1587 If scan reaches end of buffer, return that position.
1588 This function does not move point."
1590 (if buffer (set-buffer buffer))
1591 (end-of-line (or n 1))
1594 (defsubst-maybe define-obsolete-function-alias (oldfun newfun)
1595 "Define OLDFUN as an obsolete alias for function NEWFUN.
1596 This makes calling OLDFUN equivalent to calling NEWFUN and marks OLDFUN
1598 (defalias oldfun newfun)
1599 (make-obsolete oldfun newfun))
1601 ;; XEmacs 21: (character-to-event CH &optional EVENT DEVICE)
1602 (defun-maybe character-to-event (ch)
1603 "Convert keystroke CH into an event structure, replete with bucky bits.
1604 Note that CH (the keystroke specifier) can be an integer, a character
1605 or a symbol such as 'clear."
1608 ;; XEmacs 21: (event-to-character EVENT
1609 ;; &optional ALLOW-EXTRA-MODIFIERS ALLOW-META ALLOW-NON-ASCII)
1610 (defun-maybe-cond event-to-character (event)
1611 "Return the character approximation to the given event object.
1612 If the event isn't a keypress, this returns nil."
1613 ((and (fboundp 'read-event)
1614 (subrp (symbol-function 'read-event)))
1615 ;; Emacs 19 and later.
1618 ;; mask is (BASE-TYPE MODIFIER-BITS) or nil.
1619 (let ((mask (get event 'event-symbol-element-mask)))
1621 (let ((base (get (car mask) 'ascii-character)))
1623 (logior base (car (cdr mask))))))))
1624 ((integerp event) event)))
1626 ;; v18. Is this correct?
1629 ;; v18: no event; (read-char)
1630 ;; Emacs 19, 20.1 and 20.2: (read-event)
1631 ;; Emacs 20.3: (read-event &optional PROMPT SUPPRESS-INPUT-METHOD)
1632 ;; Emacs 20.4: (read-event &optional PROMPT INHERIT-INPUT-METHOD)
1633 ;; XEmacs: (next-event &optional EVENT PROMPT),
1634 ;; (next-command-event &optional EVENT PROMPT)
1635 (defun-maybe-cond next-command-event (&optional event prompt)
1636 "Read an event object from the input stream.
1637 If EVENT is non-nil, it should be an event object and will be filled
1638 in and returned; otherwise a new event object will be created and
1640 If PROMPT is non-nil, it should be a string and will be displayed in
1641 the echo area while this function is waiting for an event."
1642 ((and (>= emacs-major-version 20)
1643 (>= emacs-minor-version 4))
1644 ;; Emacs 20.4 and later.
1645 (read-event prompt)) ; should specify 2nd arg?
1646 ((and (= emacs-major-version 20)
1647 (= emacs-minor-version 3))
1649 (read-event prompt)) ; should specify 2nd arg?
1650 ((and (fboundp 'read-event)
1651 (subrp (symbol-function 'read-event)))
1652 ;; Emacs 19, 20.1 and 20.2.
1653 (if prompt (message prompt))
1656 (if prompt (message prompt))
1660 ;;; @ MULE 2 emulation.
1663 (defun-maybe-cond cancel-undo-boundary ()
1664 "Cancel undo boundary."
1665 ((boundp 'buffer-undo-list)
1666 ;; for Emacs 19 and later.
1667 (if (and (consp buffer-undo-list)
1668 (null (car buffer-undo-list)))
1669 (setq buffer-undo-list (cdr buffer-undo-list)))))
1675 ;;; poe.el ends here