xemacs-beta: lisp/prim/simple.el comparison

comparison lisp/prim/simple.el @ 0:376386a54a3c r19-14

Import from CVS: tag r19-14

author	cvs
date	Mon, 13 Aug 2007 08:45:50 +0200
parents
children	ac2d302a0011

comparison

equal deleted inserted replaced

--1:000000000000
+:376386a54a3c
+;;; simple.el --- basic editing commands for XEmacs
+;; Copyright (C) 1985, 1986, 1987, 1993-1995 Free Software Foundation, Inc.
+;; Copyright (C) 1995 Tinker Systems and INS Engineering Corp.
+;; This file is part of XEmacs.
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+;; You should have received a copy of the GNU General Public License
+;; along with XEmacs; see the file COPYING.  If not, write to the Free
+;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;;; Synched up with: FSF 19.30.
+;;; Commentary:
+;; A grab-bag of basic XEmacs commands not specifically related to some
+;; major mode or to file-handling.
+;;; Changes for zmacs-style active-regions:
+;;;
+;;; beginning-of-buffer, end-of-buffer, count-lines-region,
+;;; count-lines-buffer, what-line, what-cursor-position, set-goal-column,
+;;; set-fill-column, prefix-arg-internal, and line-move (which is used by
+;;; next-line and previous-line) set zmacs-region-stays to t, so that they
+;;; don't affect the current region-hilighting state.
+;;;
+;;; mark-whole-buffer, mark-word, exchange-point-and-mark, and
+;;; set-mark-command (without an argument) call zmacs-activate-region.
+;;;
+;;; mark takes an optional arg like the new Fmark_marker() does.  When
+;;; the region is not active, mark returns nil unless the optional arg is true.
+;;;
+;;; push-mark, pop-mark, exchange-point-and-mark, and set-marker, and
+;;; set-mark-command use (mark t) so that they can access the mark whether
+;;; the region is active or not.
+;;;
+;;; shell-command, shell-command-on-region, yank, and yank-pop (which all
+;;; push a mark) have been altered to call exchange-point-and-mark with an
+;;; argument, meaning "don't activate the region".  These commands  only use
+;;; exchange-point-and-mark to position the newly-pushed mark correctly, so
+;;; this isn't a user-visible change.  These functions have also been altered
+;;; to use (mark t) for the same reason.
+;;; Code:
+(defun newline (&optional arg)
+"Insert a newline, and move to left margin of the new line if it's blank.
+The newline is marked with the text-property `hard'.
+With arg, insert that many newlines.
+In Auto Fill mode, if no numeric arg, break the preceding line if it's long."
+(interactive "*P")
+(barf-if-buffer-read-only nil (point))
+;; Inserting a newline at the end of a line produces better redisplay in
+;; try_window_id than inserting at the beginning of a line, and the textual
+;; result is the same.  So, if we're at beginning of line, pretend to be at
+;; the end of the previous line.
+(let ((flag (and (not (bobp))
+		   (bolp)
+		   (< (or (previous-extent-change (point)) -2)
+		      (- (point) 2))))
+	(was-page-start (and (bolp)
+			     (looking-at page-delimiter)))
+	(beforepos (point)))
+(if flag (backward-char 1))
+;; Call self-insert so that auto-fill, abbrev expansion etc. happens.
+;; Set last-command-char to tell self-insert what to insert.
+(let ((last-command-char ?\n)
+	  ;; Don't auto-fill if we have a numeric argument.
+	  ;; Also not if flag is true (it would fill wrong line);
+	  ;; there is no need to since we're at BOL.
+	  (auto-fill-function (if (or arg flag) nil auto-fill-function)))
+(unwind-protect
+	  (self-insert-command (prefix-numeric-value arg))
+	;; If we get an error in self-insert-command, put point at right place.
+	(if flag (forward-char 1))))
+;; If we did *not* get an error, cancel that forward-char.
+(if flag (backward-char 1))
+;; Mark the newline(s) `hard'.
+(if use-hard-newlines
+	(let* ((from (- (point) (if arg (prefix-numeric-value arg) 1)))
+	       (sticky (get-text-property from 'end-open)))
+	  (put-text-property from (point) 'hard 't)
+	  ;; If end-open is not "t", add 'hard to end-open list
+	  (if (and (listp sticky) (not (memq 'hard sticky)))
+	      (put-text-property from (point) 'end-open
+				 (cons 'hard sticky)))))
+;; If the newline leaves the previous line blank,
+;; and we have a left margin, delete that from the blank line.
+(or flag
+	(save-excursion
+	  (goto-char beforepos)
+	  (beginning-of-line)
+	  (and (looking-at "[ \t]$")
+	       (> (current-left-margin) 0)
+	       (delete-region (point) (progn (end-of-line) (point))))))
+(if flag (forward-char 1))
+;; Indent the line after the newline, except in one case:
+;; when we added the newline at the beginning of a line
+;; which starts a page.
+(or was-page-start
+	(move-to-left-margin nil t)))
+nil)
+(defun open-line (arg)
+"Insert a newline and leave point before it.
+If there is a fill prefix and/or a left-margin, insert them on the new line
+if the line would have been blank.
+With arg N, insert N newlines."
+;;   "Insert a newline and leave point before it.
+;; If there is a fill prefix, insert the fill prefix on the new line
+;; if the line would have been empty.
+;; With arg N, insert N newlines."
+(interactive "*p")
+(let* ((do-fill-prefix (and fill-prefix (bolp)))
+	 ;well, I'm going to re-enable this.  --ben
+	 ;(do-fill-prefix nil)  ;; screw this -- says JWZ
+	 (do-left-margin (and (bolp) (> (current-left-margin) 0)))
+	 (loc (point)))
+(newline arg)
+(goto-char loc)
+(while (> arg 0)
+(cond ((bolp)
+	     (if do-left-margin (indent-to (current-left-margin)))
+	     (if do-fill-prefix (insert fill-prefix))))
+(forward-line 1)
+(setq arg (1- arg)))
+(goto-char loc)
+(end-of-line)))
+(defun split-line ()
+"Split current line, moving portion beyond point vertically down."
+(interactive "*")
+(skip-chars-forward " \t")
+(let ((col (current-column))
+	(pos (point)))
+(newline 1)
+(indent-to col 0)
+(goto-char pos)))
+(defun quoted-insert (arg)
+"Read next input character and insert it.
+This is useful for inserting control characters.
+You may also type up to 3 octal digits, to insert a character with that code.
+In overwrite mode, this function inserts the character anyway, and
+does not handle octal digits specially.  This means that if you use
+overwrite as your normal editing mode, you can use this function to
+insert characters when necessary.
+In binary overwrite mode, this function does overwrite, and octal
+digits are interpreted as a character code.  This is supposed to make
+this function useful in editing binary files."
+(interactive "*p")
+(let ((char (if (or (not overwrite-mode)
+		      (eq overwrite-mode 'overwrite-mode-binary))
+		  (read-quoted-char)
+		(read-char))))
+(if (> arg 0)
+	(if (eq overwrite-mode 'overwrite-mode-binary)
+	    (delete-char arg)))
+(while (> arg 0)
+(insert char)
+(setq arg (1- arg)))))
+(defun delete-indentation (&optional arg)
+"Join this line to previous and fix up whitespace at join.
+If there is a fill prefix, delete it from the beginning of this line.
+With argument, join this line to following line."
+(interactive "*P")
+(beginning-of-line)
+(if arg (forward-line 1))
+(if (eq (preceding-char) ?\n)
+(progn
+	(delete-region (point) (1- (point)))
+	;; If the second line started with the fill prefix,
+	;; delete the prefix.
+	(if (and fill-prefix
+		 (<= (+ (point) (length fill-prefix)) (point-max))
+		 (string= fill-prefix
+			  (buffer-substring (point)
+					    (+ (point) (length fill-prefix)))))
+	    (delete-region (point) (+ (point) (length fill-prefix))))
+	(fixup-whitespace))))
+(defun fixup-whitespace ()
+"Fixup white space between objects around point.
+Leave one space or none, according to the context."
+(interactive "*")
+(save-excursion
+(delete-horizontal-space)
+(if (or (looking-at "^\\|\\s)")
+	    (save-excursion (forward-char -1)
+			    (looking-at "$\\|\\s(\\|\\s'")))
+	nil
+(insert ?\ ))))
+(defun delete-horizontal-space ()
+"Delete all spaces and tabs around point."
+(interactive "*")
+(skip-chars-backward " \t")
+(delete-region (point) (progn (skip-chars-forward " \t") (point))))
+(defun just-one-space ()
+"Delete all spaces and tabs around point, leaving one space."
+(interactive "*")
+(expand-abbrev)
+(skip-chars-backward " \t")
+(if (= (following-char) ? )
+(forward-char 1)
+(insert ? ))
+(delete-region (point) (progn (skip-chars-forward " \t") (point))))
+(defun delete-blank-lines ()
+"On blank line, delete all surrounding blank lines, leaving just one.
+On isolated blank line, delete that one.
+On nonblank line, delete any immediately following blank lines."
+(interactive "*")
+(let (thisblank singleblank)
+(save-excursion
+(beginning-of-line)
+(setq thisblank (looking-at "[ \t]*$"))
+;; Set singleblank if there is just one blank line here.
+(setq singleblank
+	    (and thisblank
+		 (not (looking-at "[ \t]*\n[ \t]*$"))
+		 (or (bobp)
+		     (progn (forward-line -1)
+			    (not (looking-at "[ \t]*$")))))))
+;; Delete preceding blank lines, and this one too if it's the only one.
+(if thisblank
+	(progn
+	  (beginning-of-line)
+	  (if singleblank (forward-line 1))
+	  (delete-region (point)
+			 (if (re-search-backward "[^ \t\n]" nil t)
+			     (progn (forward-line 1) (point))
+			   (point-min)))))
+;; Delete following blank lines, unless the current line is blank
+;; and there are no following blank lines.
+(if (not (and thisblank singleblank))
+	(save-excursion
+	  (end-of-line)
+	  (forward-line 1)
+	  (delete-region (point)
+			 (if (re-search-forward "[^ \t\n]" nil t)
+			     (progn (beginning-of-line) (point))
+			   (point-max)))))
+;; Handle the special case where point is followed by newline and eob.
+;; Delete the line, leaving point at eob.
+(if (looking-at "^[ \t]*\n\\'")
+	(delete-region (point) (point-max)))))
+(defun back-to-indentation ()
+"Move point to the first non-whitespace character on this line."
+(interactive "_")
+(beginning-of-line 1)
+(skip-chars-forward " \t"))
+(defun newline-and-indent ()
+"Insert a newline, then indent according to major mode.
+Indentation is done using the value of `indent-line-function'.
+In programming language modes, this is the same as TAB.
+In some text modes, where TAB inserts a tab, this command indents to the
+column specified by the function `current-left-margin'."
+(interactive "*")
+(delete-region (point) (progn (skip-chars-backward " \t") (point)))
+(newline)
+(indent-according-to-mode))
+(defun reindent-then-newline-and-indent ()
+"Reindent current line, insert newline, then indent the new line.
+Indentation of both lines is done according to the current major mode,
+which means calling the current value of `indent-line-function'.
+In programming language modes, this is the same as TAB.
+In some text modes, where TAB inserts a tab, this indents to the
+column specified by the function `current-left-margin'."
+(interactive "*")
+(save-excursion
+(delete-region (point) (progn (skip-chars-backward " \t") (point)))
+(indent-according-to-mode))
+(newline)
+(indent-according-to-mode))
+;; Internal subroutine of delete-char
+(defun kill-forward-chars (arg)
+(if (listp arg) (setq arg (car arg)))
+(if (eq arg '-) (setq arg -1))
+(kill-region (point) (+ (point) arg)))
+;; Internal subroutine of backward-delete-char
+(defun kill-backward-chars (arg)
+(if (listp arg) (setq arg (car arg)))
+(if (eq arg '-) (setq arg -1))
+(kill-region (point) (- (point) arg)))
+(defun backward-delete-char-untabify (arg &optional killp)
+"Delete characters backward, changing tabs into spaces.
+Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil.
+Interactively, ARG is the prefix arg (default 1)
+and KILLP is t if a prefix arg was specified."
+(interactive "*p\nP")
+(let ((count arg))
+(save-excursion
+(while (and (> count 0) (not (bobp)))
+	(if (= (preceding-char) ?\t)
+	    (let ((col (current-column)))
+	      (forward-char -1)
+	      (setq col (- col (current-column)))
+	      (insert-char ?\ col)
+	      (delete-char 1)))
+	(forward-char -1)
+	(setq count (1- count)))))
+(delete-backward-char arg killp)
+;; In overwrite mode, back over columns while clearing them out,
+;; unless at end of line.
+(and overwrite-mode (not (eolp))
+(save-excursion (insert-char ?\  arg))))
+(defun zap-to-char (arg char)
+"Kill up to and including ARG'th occurrence of CHAR.
+Goes backward if ARG is negative; error if CHAR not found."
+(interactive "*p\ncZap to char: ")
+(kill-region (point) (progn
+			 (search-forward (char-to-string char) nil nil arg)
+;			 (goto-char (if (> arg 0) (1- (point)) (1+ (point))))
+			 (point))))
+(defun beginning-of-buffer (&optional arg)
+"Move point to the beginning of the buffer; leave mark at previous position.
+With arg N, put point N/10 of the way from the beginning.
+If the buffer is narrowed, this command uses the beginning and size
+of the accessible part of the buffer.
+Don't use this command in Lisp programs!
+\(goto-char (point-min)) is faster and avoids clobbering the mark."
+(interactive "_P")
+(push-mark)
+(let ((size (- (point-max) (point-min))))
+(goto-char (if arg
+		   (+ (point-min)
+		      (if (> size 10000)
+			  ;; Avoid overflow for large buffer sizes!
+			  (* (prefix-numeric-value arg)
+			     (/ size 10))
+			(/ (+ 10 (* size (prefix-numeric-value arg))) 10)))
+		 (point-min))))
+(if arg (forward-line 1)))
+(defun end-of-buffer (&optional arg)
+"Move point to the end of the buffer; leave mark at previous position.
+With arg N, put point N/10 of the way from the end.
+If the buffer is narrowed, this command uses the beginning and size
+of the accessible part of the buffer.
+Don't use this command in Lisp programs!
+\(goto-char (point-max)) is faster and avoids clobbering the mark."
+(interactive "_P")
+(push-mark)
+;; XEmacs changes here.
+(let ((scroll-to-end (not (pos-visible-in-window-p (point-max))))
+	(size (- (point-max) (point-min))))
+(goto-char (if arg
+		   (- (point-max)
+		      (if (> size 10000)
+			  ;; Avoid overflow for large buffer sizes!
+			  (* (prefix-numeric-value arg)
+			     (/ size 10))
+			(/ (* size (prefix-numeric-value arg)) 10)))
+		 (point-max)))
+(cond (arg
+;; If we went to a place in the middle of the buffer,
+;; adjust it to the beginning of a line.
+(forward-line 1))
+	  (scroll-to-end
+;; If the end of the buffer is not already on the screen,
+;; then scroll specially to put it near, but not at, the bottom.
+(recenter -3)))))
+(defun mark-beginning-of-buffer (&optional arg)
+"Push a mark at the beginning of the buffer; leave point where it is.
+With arg N, push mark N/10 of the way from the true beginning."
+(interactive "P")
+(push-mark (if arg
+		 (if (> (buffer-size) 10000)
+		     ;; Avoid overflow for large buffer sizes!
+		     (* (prefix-numeric-value arg)
+			(/ (buffer-size) 10))
+		   (/ (+ 10 (* (buffer-size) (prefix-numeric-value arg))) 10))
+	       (point-min))
+nil
+t))
+(define-function 'mark-bob 'mark-beginning-of-buffer)
+(defun mark-end-of-buffer (&optional arg)
+"Push a mark at the end of the buffer; leave point where it is.
+With arg N, push mark N/10 of the way from the true end."
+(interactive "P")
+(push-mark (if arg
+		 (- (1+ (buffer-size))
+		    (if (> (buffer-size) 10000)
+			;; Avoid overflow for large buffer sizes!
+			(* (prefix-numeric-value arg)
+			   (/ (buffer-size) 10))
+		      (/ (* (buffer-size) (prefix-numeric-value arg)) 10)))
+(point-max))
+nil
+t))
+(define-function 'mark-eob 'mark-end-of-buffer)
+(defun mark-whole-buffer ()
+"Put point at beginning and mark at end of buffer.
+You probably should not use this function in Lisp programs;
+it is usually a mistake for a Lisp function to use any subroutine
+that uses or sets the mark."
+(interactive)
+(push-mark (point))
+(push-mark (point-max) nil t)
+(goto-char (point-min)))
+(defun eval-current-buffer (&optional printflag)
+"Evaluate the current buffer as Lisp code.
+Programs can pass argument PRINTFLAG which controls printing of output:
+nil means discard it; anything else is stream for print."
+(interactive)
+(eval-buffer (current-buffer) printflag))
+(defun count-words-buffer (b)
+(interactive "b")
+(save-excursion
+(let ((buf (or b (current-buffer))))
+(set-buffer buf)
+(message "Buffer has %d words"
+	       (count-words-region (point-min) (point-max))))))
+(defun count-words-region (start end)
+(interactive "r")
+(save-excursion
+(let ((n 0))
+(goto-char start)
+(while (< (point) end)
+	(if (forward-word 1)
+	    (setq n (1+ n))))
+(message "Region has %d words" n)
+n)))
+(defun count-lines-region (start end)
+"Print number of lines and characters in the region."
+(interactive "_r")
+(let ((n (count-lines start end)))
+(message "Region has %d lines, %d characters"
+	     n (- end start))
+n))
+(defun count-lines-buffer (b)
+"Print number of lines and charcters in the specified buffer."
+(interactive "_b")
+(save-excursion
+(let ((buf (or b (current-buffer)))
+cnt)
+(set-buffer buf)
+(setq cnt (count-lines (point-min) (point-max)))
+(message "Region has %d lines, %d characters"
+cnt (- (point-max) (point-min)))
+cnt)))
+(defun what-line ()
+"Print the current buffer line number and narrowed line number of point."
+(interactive "_")
+(let ((opoint (point)) start)
+(save-excursion
+(save-restriction
+	(goto-char (point-min))
+	(widen)
+	(beginning-of-line)
+	(setq start (point))
+	(goto-char opoint)
+	(beginning-of-line)
+	(if (/= start 1)
+	    (message "line %d (narrowed line %d)"
+		     (1+ (count-lines 1 (point)))
+		     (1+ (count-lines start (point))))
+	  (message "Line %d" (1+ (count-lines 1 (point)))))))))
+(defun count-lines (start end)
+"Return number of lines between START and END.
+This is usually the number of newlines between them,
+but can be one more if START is not equal to END
+and the greater of them is not at the start of a line."
+(save-excursion
+(save-restriction
+(narrow-to-region start end)
+(goto-char (point-min))
+(if (eq selective-display t)
+	  (save-match-data
+	    (let ((done 0))
+	      (while (re-search-forward "[\n\C-m]" nil t 40)
+		(setq done (+ 40 done)))
+	      (while (re-search-forward "[\n\C-m]" nil t 1)
+		(setq done (+ 1 done)))
+	      (goto-char (point-max))
+	      (if (and (/= start end)
+		       (not (bolp)))
+		  (1+ done)
+		done)))
+	(- (buffer-size) (forward-line (buffer-size)))))))
+(defun what-cursor-position ()
+"Print info on cursor position (on screen and within buffer)."
+(interactive "_")
+(let* ((char (following-char))
+	 (beg (point-min))
+	 (end (point-max))
+(pos (point))
+	 (total (buffer-size))
+	 (percent (if (> total 50000)
+		      ;; Avoid overflow from multiplying by 100!
+		      (/ (+ (/ total 200) (1- pos)) (max (/ total 100) 1))
+		    (/ (+ (/ total 2) (* 100 (1- pos))) (max total 1))))
+	 (hscroll (if (= (window-hscroll) 0)
+		      ""
+		    (format " Hscroll=%d" (window-hscroll))))
+	 (col (current-column)))
+(if (= pos end)
+	(if (or (/= beg 1) (/= end (1+ total)))
+	    (message "point=%d of %d(%d%%) <%d - %d>  column %d %s"
+		     pos total percent beg end col hscroll)
+	  (message "point=%d of %d(%d%%)  column %d %s"
+		   pos total percent col hscroll))
+(if (or (/= beg 1) (/= end (1+ total)))
+	  (message "Char: %s (0%o, %d, 0x%x)  point=%d of %d(%d%%) <%d - %d>  column %d %s"
+		   (text-char-description char) char char char pos total
+		   percent beg end col hscroll)
+	(message "Char: %s (0%o, %d, 0x%x)  point=%d of %d(%d%%)  column %d %s"
+		 (text-char-description char) char char char pos total
+		 percent col hscroll)))))
+(defun fundamental-mode ()
+"Major mode not specialized for anything in particular.
+Other major modes are defined by comparison with this one."
+(interactive)
+(kill-all-local-variables))
+;; We define this, rather than making `eval' interactive,
+;; for the sake of completion of names like eval-region, eval-current-buffer.
+(defun eval-expression (expression)
+"Evaluate EXPRESSION and print value in minibuffer.
+Value is also consed on to front of the variable `values'."
+(interactive "xEval: ")
+(setq values (cons (eval expression) values))
+(prin1 (car values) t))
+(defun edit-and-eval-command (prompt command &optional history)
+"Prompting with PROMPT, let user edit COMMAND and eval result.
+COMMAND is a Lisp expression.  Let user edit that expression in
+the minibuffer, then read and evaluate the result."
+(let ((command (read-expression prompt
+				  ;; first try to format the thing readably;
+				  ;; and if that fails, print it normally.
+				  (condition-case ()
+				      (let ((print-readably t))
+					(prin1-to-string command))
+				    (error (prin1-to-string command)))
+				  (or history '(command-history . 1)))))
+(or history (setq history 'command-history))
+(if (consp history)
+	(setq history (car history)))
+(if (eq history t)
+	nil
+;; If command was added to the history as a string,
+;; get rid of that.  We want only evallable expressions there.
+(if (stringp (car (symbol-value history)))
+	  (set history (cdr (symbol-value history))))
+;; If command to be redone does not match front of history,
+;; add it to the history.
+(or (equal command (car (symbol-value history)))
+	  (set history (cons command (symbol-value history)))))
+(eval command)))
+(defun repeat-complex-command (arg)
+"Edit and re-evaluate last complex command, or ARGth from last.
+A complex command is one which used the minibuffer.
+The command is placed in the minibuffer as a Lisp form for editing.
+The result is executed, repeating the command as changed.
+If the command has been changed or is not the most recent previous command
+it is added to the front of the command history.
+You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element]
+to get different commands to edit and resubmit."
+(interactive "p")
+(let ((print-level nil))
+(edit-and-eval-command "Redo: "
+			   (or (nth (1- arg) command-history)
+			       (error ""))
+			   (cons 'command-history arg))))
+(defun goto-line (arg)
+"Goto line ARG, counting from line 1 at beginning of buffer."
+(interactive "NGoto line: ")
+(setq arg (prefix-numeric-value arg))
+(save-restriction
+(widen)
+(goto-char 1)
+(if (eq selective-display t)
+	(re-search-forward "[\n\C-m]" nil 'end (1- arg))
+(forward-line (1- arg)))))
+;Put this on C-x u, so we can force that rather than C-_ into startup msg
+(define-function 'advertised-undo 'undo)
+(defun undo (&optional arg)
+"Undo some previous changes.
+Repeat this command to undo more changes.
+A numeric argument serves as a repeat count."
+(interactive "*p")
+;; If we don't get all the way through, make last-command indicate that
+;; for the following command.
+(setq this-command t)
+(let ((modified (buffer-modified-p))
+	(recent-save (recent-auto-save-p)))
+(or (eq (selected-window) (minibuffer-window))
+	(message "Undo!"))
+(or (and (eq last-command 'undo)
+	     (eq (current-buffer) last-undo-buffer))
+	(progn (undo-start)
+	       (undo-more 1)))
+(undo-more (or arg 1))
+;; Don't specify a position in the undo record for the undo command.
+;; Instead, undoing this should move point to where the change is.
+(let ((tail buffer-undo-list)
+	  done)
+(while (and tail (not done) (not (null (car tail))))
+	(if (integerp (car tail))
+	    (progn
+	      (setq done t)
+	      (setq buffer-undo-list (delq (car tail) buffer-undo-list))))
+	(setq tail (cdr tail))))
+(and modified (not (buffer-modified-p))
+	 (delete-auto-save-file-if-necessary recent-save)))
+;; If we do get all the way through, make this-command indicate that.
+(setq this-command 'undo))
+(defvar pending-undo-list nil
+"Within a run of consecutive undo commands, list remaining to be undone.")
+(defvar last-undo-buffer nil)
+(defun undo-start ()
+"Set `pending-undo-list' to the front of the undo list.
+The next call to `undo-more' will undo the most recently made change."
+(if (eq buffer-undo-list t)
+(error "No undo information in this buffer"))
+(setq pending-undo-list buffer-undo-list))
+(defun undo-more (count)
+"Undo back N undo-boundaries beyond what was already undone recently.
+Call `undo-start' to get ready to undo recent changes,
+then call `undo-more' one or more times to undo them."
+(or pending-undo-list
+(error "No further undo information"))
+(setq pending-undo-list (primitive-undo count pending-undo-list)
+	last-undo-buffer (current-buffer)))
+(defun call-with-transparent-undo (fn &rest args)
+"Apply FN to ARGS, and then undo all changes made by FN to the current
+buffer.  The undo records are processed even if FN returns non-locally.
+There is no trace of the changes made by FN in the buffer's undo history.
+You can use this in a write-file-hooks function with continue-save-buffer
+to make the contents of a disk file differ from its in-memory buffer."
+(let ((buffer-undo-list nil)
+	;; Kludge to prevent undo list truncation:
+	(undo-high-threshold -1)
+	(undo-threshold -1)
+	(obuffer (current-buffer)))
+(unwind-protect
+	(apply fn args)
+;; Go to the buffer we will restore and make it writable:
+(set-buffer obuffer)
+(save-excursion
+	(let ((buffer-read-only nil))
+	  (save-restriction
+	    (widen)
+	    ;; Perform all undos, with further undo logging disabled:
+	    (let ((tail buffer-undo-list))
+	      (setq buffer-undo-list t)
+	      (while tail
+		(setq tail (primitive-undo (length tail) tail))))))))))
+(defconst universal-argument-map
+(let ((map (make-sparse-keymap)))
+(set-keymap-default-binding map 'universal-argument-other-key)
+;FSFmacs (define-key map [switch-frame] nil)
+(define-key map [(control u)] 'universal-argument-more)
+(define-key map ?- 'universal-argument-minus)
+(define-key map ?0 'digit-argument)
+(define-key map ?1 'digit-argument)
+(define-key map ?2 'digit-argument)
+(define-key map ?3 'digit-argument)
+(define-key map ?4 'digit-argument)
+(define-key map ?5 'digit-argument)
+(define-key map ?6 'digit-argument)
+(define-key map ?7 'digit-argument)
+(define-key map ?8 'digit-argument)
+(define-key map ?9 'digit-argument)
+map)
+"Keymap used while processing \\[universal-argument].")
+(defvar universal-argument-num-events nil
+"Number of argument-specifying events read by `universal-argument'.
+`universal-argument-other-key' uses this to discard those events
+from (this-command-keys), and reread only the final command.")
+(defun universal-argument ()
+"Begin a numeric argument for the following command.
+Digits or minus sign following \\[universal-argument] make up the numeric argument.
+\\[universal-argument] following the digits or minus sign ends the argument.
+\\[universal-argument] without digits or minus sign provides 4 as argument.
+Repeating \\[universal-argument] without digits or minus sign
+multiplies the argument by 4 each time."
+(interactive)
+(setq prefix-arg (list 4))
+(setq zmacs-region-stays t)
+(setq universal-argument-num-events (length (this-command-keys)))
+(setq overriding-terminal-local-map universal-argument-map))
+;; A subsequent C-u means to multiply the factor by 4 if we've typed
+;; nothing but C-u's; otherwise it means to terminate the prefix arg.
+(defun universal-argument-more (arg)
+(interactive "P")
+(if (consp arg)
+(setq prefix-arg (list (* 4 (car arg))))
+(setq prefix-arg arg)
+(setq overriding-terminal-local-map nil))
+(setq zmacs-region-stays t)
+(setq universal-argument-num-events (length (this-command-keys))))
+(defun negative-argument (arg)
+"Begin a negative numeric argument for the next command.
+\\[universal-argument] following digits or minus sign ends the argument."
+(interactive "P")
+(cond ((integerp arg)
+	  (setq prefix-arg (- arg)))
+	 ((eq arg '-)
+	  (setq prefix-arg nil))
+	 (t
+	  (setq prefix-arg '-)))
+(setq zmacs-region-stays t)
+(setq universal-argument-num-events (length (this-command-keys)))
+(setq overriding-terminal-local-map universal-argument-map))
+(defun digit-argument (arg)
+"Part of the numeric argument for the next command.
+\\[universal-argument] following digits or minus sign ends the argument."
+(interactive "P")
+(let* ((event last-command-event)
+	 (key (and (key-press-event-p event)
+		   (event-key event)))
+	 (digit (and key (characterp key) (>= key ?0) (<= key ?9)
+		     (- key ?0))))
+(if (null digit)
+	(universal-argument-other-key arg)
+(cond ((integerp arg)
+	     (setq prefix-arg (+ (* arg 10)
+				 (if (< arg 0) (- digit) digit))))
+	    ((eq arg '-)
+	     ;; Treat -0 as just -, so that -01 will work.
+	     (setq prefix-arg (if (zerop digit) '- (- digit))))
+	    (t
+	     (setq prefix-arg digit)))
+(setq zmacs-region-stays t)
+(setq universal-argument-num-events (length (this-command-keys)))
+(setq overriding-terminal-local-map universal-argument-map))))
+;; For backward compatibility, minus with no modifiers is an ordinary
+;; command if digits have already been entered.
+(defun universal-argument-minus (arg)
+(interactive "P")
+(if (integerp arg)
+(universal-argument-other-key arg)
+(negative-argument arg)))
+;; Anything else terminates the argument and is left in the queue to be
+;; executed as a command.
+(defun universal-argument-other-key (arg)
+(interactive "P")
+(setq prefix-arg arg)
+(setq zmacs-region-stays t)
+(let* ((key (this-command-keys))
+	 ;; FSF calls silly function `listify-key-sequence' here.
+	  (keylist (append key nil)))
+(setq unread-command-events
+	   (append (nthcdr universal-argument-num-events keylist)
+		   unread-command-events)))
+(reset-this-command-lengths)
+(setq overriding-terminal-local-map nil))
+(defun forward-to-indentation (arg)
+"Move forward ARG lines and position at first nonblank character."
+(interactive "p")
+(forward-line arg)
+(skip-chars-forward " \t"))
+(defun backward-to-indentation (arg)
+"Move backward ARG lines and position at first nonblank character."
+(interactive "p")
+(forward-line (- arg))
+(skip-chars-forward " \t"))
+(defvar kill-whole-line nil
+"*If non-nil, `kill-line' with no arg at beg of line kills the whole line.")
+(defun kill-line (&optional arg)
+"Kill the rest of the current line; if no nonblanks there, kill thru newline.
+With prefix argument, kill that many lines from point.
+Negative arguments kill lines backward.
+When calling from a program, nil means \"no arg\",
+a number counts as a prefix arg.
+If `kill-whole-line' is non-nil, then kill the whole line
+when given no argument at the beginning of a line."
+(interactive "*P")
+(kill-region (point)
+	       ;; Don't shift point before doing the delete; that way,
+	       ;; undo will record the right position of point.
+	       (save-excursion
+		 (if arg
+		     (forward-line (prefix-numeric-value arg))
+		   (if (eobp)
+		       (signal 'end-of-buffer nil))
+		   (if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp)))
+		       (forward-line 1)
+		     (end-of-line)))
+		 (point))))
+(defun backward-kill-line nil
+"Kill back to the beginning of the line."
+(interactive)
+(let ((point (point)))
+(beginning-of-line nil)
+(kill-region (point) point)))
+;;;; Window system cut and paste hooks.
+;;;
+;;; I think that kill-hooks is a better name and more general mechanism
+;;; than interprogram-cut-function (from FSFmacs).  I don't like the behavior
+;;; of interprogram-paste-function: ^Y should always come from the kill ring,
+;;; not the X selection.  But if that were provided, it should be called (and
+;;; behave as) yank-hooks instead.  -- jwz
+;(defvar interprogram-cut-function nil
+;  "Function to call to make a killed region available to other programs.
+;
+;Most window systems provide some sort of facility for cutting and
+;pasting text between the windows of different programs.
+;This variable holds a function that XEmacs calls whenever text
+;is put in the kill ring, to make the new kill available to other
+;programs.
+;
+;The function takes one or two arguments.
+;The first argument, TEXT, is a string containing
+;the text which should be made available.
+;The second, PUSH, if non-nil means this is a \"new\" kill;
+;nil means appending to an \"old\" kill.")
+;
+;(defvar interprogram-paste-function nil
+;  "Function to call to get text cut from other programs.
+;
+;Most window systems provide some sort of facility for cutting and
+;pasting text between the windows of different programs.
+;This variable holds a function that Emacs calls to obtain
+;text that other programs have provided for pasting.
+;
+;The function should be called with no arguments.  If the function
+;returns nil, then no other program has provided such text, and the top
+;of the Emacs kill ring should be used.  If the function returns a
+;string, that string should be put in the kill ring as the latest kill.
+;
+;Note that the function should return a string only if a program other
+;than Emacs has provided a string for pasting; if Emacs provided the
+;most recent string, the function should return nil.  If it is
+;difficult to tell whether Emacs or some other program provided the
+;current string, it is probably good enough to return nil if the string
+;is equal (according to `string=') to the last text Emacs provided.")
+(defvar kill-hooks nil
+"Functions run when something is added to the XEmacs kill ring.
+These functions are called with one argument, the string most recently
+cut or copied.  You can use this to, for example, make the most recent
+kill become the X Clipboard selection.")
+;;;; The kill ring data structure.
+(defvar kill-ring nil
+"List of killed text sequences.
+In order to maintain correct interaction with cut-and-paste facilities
+offered by window systems, the functions `kill-new', `kill-append', and
+`current-kill' should be used to access the kill ring, instead of using
+this variable directly.")
+(defvar kill-ring-max 30
+"*Maximum length of kill ring before oldest elements are thrown away.")
+(defvar kill-ring-yank-pointer nil
+"The tail of the kill ring whose car is the last thing yanked.")
+(defun kill-new (string &optional replace)
+"Make STRING the latest kill in the kill ring.
+Set the kill-ring-yank pointer to point to it.
+Run `kill-hooks'.
+Optional second argument REPLACE non-nil means that STRING will replace
+the front of the kill ring, rather than being added to the list."
+;  (and (fboundp 'menu-bar-update-yank-menu)
+;       (menu-bar-update-yank-menu string (and replace (car kill-ring))))
+(if replace
+(setcar kill-ring string)
+(setq kill-ring (cons string kill-ring))
+(if (> (length kill-ring) kill-ring-max)
+	(setcdr (nthcdr (1- kill-ring-max) kill-ring) nil)))
+(setq kill-ring-yank-pointer kill-ring)
+;  (if interprogram-cut-function
+;      (funcall interprogram-cut-function string (not replace)))
+(run-hook-with-args 'kill-hooks string))
+(defun kill-append (string before-p)
+"Append STRING to the end of the latest kill in the kill ring.
+If BEFORE-P is non-nil, prepend STRING to the kill.
+Run `kill-hooks'."
+(kill-new (if before-p
+		(concat string (car kill-ring))
+	      (concat (car kill-ring) string)) t))
+(defun current-kill (n &optional do-not-move)
+"Rotate the yanking point by N places, and then return that kill.
+If optional arg DO-NOT-MOVE is non-nil, then don't actually move the
+yanking point\; just return the Nth kill forward."
+(or kill-ring (error "Kill ring is empty"))
+(let* ((tem (nthcdr (mod (- n (length kill-ring-yank-pointer))
+(length kill-ring))
+		      kill-ring)))
+(or do-not-move
+	(setq kill-ring-yank-pointer tem))
+(car tem)))
+;;;; Commands for manipulating the kill ring.
+;;FSFmacs
+;(defvar kill-read-only-ok nil
+;  "*Non-nil means don't signal an error for killing read-only text.")
+(defun kill-region (beg end &optional verbose) ; verbose is XEmacs addition
+"Kill between point and mark.
+The text is deleted but saved in the kill ring.
+The command \\[yank] can retrieve it from there.
+\(If you want to kill and then yank immediately, use \\[copy-region-as-kill].)
+This is the primitive for programs to kill text (as opposed to deleting it).
+Supply two arguments, character numbers indicating the stretch of text
+to be killed.
+Any command that calls this function is a \"kill command\".
+If the previous command was also a kill command,
+the text killed this time appends to the text killed last time
+to make one entry in the kill ring."
+(interactive "*r\np")
+;  (interactive
+;   (let ((region-hack (and zmacs-regions (eq last-command 'yank))))
+;     ;; This lets "^Y^W" work.  I think this is dumb, but zwei did it.
+;     (if region-hack (zmacs-activate-region))
+;     (prog1
+;	 (list (point) (mark) current-prefix-arg)
+;       (if region-hack (zmacs-deactivate-region)))))
+;; beg and end can be markers but the rest of this function is
+;; written as if they are only integers
+(if (markerp beg) (setq beg (marker-position beg)))
+(if (markerp end) (setq end (marker-position end)))
+(or (and beg end) (if zmacs-regions ;; rewritten for I18N3 snarfing
+			(error "The region is not active now")
+		      (error "The mark is not set now")))
+(if verbose (if buffer-read-only
+		  (message "Copying %d characters"
+		       (- (max beg end) (min beg end)))
+		  (message "Killing %d characters"
+		       (- (max beg end) (min beg end)))))
+(cond
+;; I don't like this large change in behavior -- jwz
+;; If the buffer is read-only, we should beep, in case the person
+;; just isn't aware of this.  However, there's no harm in putting
+;; the region's text in the kill ring, anyway.
+;;((or (and buffer-read-only (not inhibit-read-only))
+;;	  (text-property-not-all beg end 'read-only nil))
+;; (if verbose (message "Copying %d characters"
+;;		      (- (max beg end) (min beg end))))
+;; (copy-region-as-kill beg end)
+;; ;; This should always barf, and give us the correct error.
+;; (if kill-read-only-ok
+;;	  (message "Read only text copied to kill ring")
+;;	(setq this-command 'kill-region)
+;;	(barf-if-buffer-read-only)))
+;; In certain cases, we can arrange for the undo list and the kill
+;; ring to share the same string object.  This code does that.
+((not (or (eq buffer-undo-list t)
+	     (eq last-command 'kill-region)
+	     ;; Use = since positions may be numbers or markers.
+	     (= beg end)))
+;; Don't let the undo list be truncated before we can even access it.
+(let ((undo-high-threshold (+ (- (max beg end) (min beg end)) 100))
+	  ;(old-list buffer-undo-list)
+	  tail)
+(delete-region beg end)
+;; Search back in buffer-undo-list for this string,
+;; in case a change hook made property changes.
+(setq tail buffer-undo-list)
+(while (not (stringp (car-safe (car-safe tail))))
+	(setq tail (cdr tail)))
+;; Take the same string recorded for undo
+;; and put it in the kill-ring.
+(kill-new (car (car tail)))))
+(t
+;; if undo is not kept, grab the string then delete it (which won't
+;; add another string to the undo list).
+(copy-region-as-kill beg end)
+(delete-region beg end)))
+(setq this-command 'kill-region))
+;; copy-region-as-kill no longer sets this-command, because it's confusing
+;; to get two copies of the text when the user accidentally types M-w and
+;; then corrects it with the intended C-w.
+(defun copy-region-as-kill (beg end)
+"Save the region as if killed, but don't kill it.
+Run `kill-hooks'."
+(interactive "r")
+(if (eq last-command 'kill-region)
+(kill-append (buffer-substring beg end) (< end beg))
+(kill-new (buffer-substring beg end)))
+nil)
+(defun kill-ring-save (beg end)
+"Save the region as if killed, but don't kill it.
+This command is similar to `copy-region-as-kill', except that it gives
+visual feedback indicating the extent of the region being copied."
+(interactive "r")
+(copy-region-as-kill beg end)
+;; copy before delay, for xclipboard's benefit
+(if (interactive-p)
+(let ((other-end (if (= (point) beg) end beg))
+	    (opoint (point))
+	    ;; Inhibit quitting so we can make a quit here
+	    ;; look like a C-g typed as a command.
+	    (inhibit-quit t))
+	(if (pos-visible-in-window-p other-end (selected-window))
+	    (progn
+	      (goto-char other-end)
+(sit-for 1)
+(goto-char opoint)
+;; If user quit, deactivate the mark
+	      ;; as C-g would as a command.
+	      (and quit-flag (mark)
+(zmacs-deactivate-region)))
+	  ;; too noisy. -- jwz
+;	  (let* ((killed-text (current-kill 0))
+;		 (message-len (min (length killed-text) 40)))
+;	    (if (= (point) beg)
+;		;; Don't say "killed"; that is misleading.
+;		(message "Saved text until \"%s\""
+;			(substring killed-text (- message-len)))
+;	      (message "Saved text from \"%s\""
+;		      (substring killed-text 0 message-len))))
+	  ))))
+(defun append-next-kill ()
+"Cause following command, if it kills, to append to previous kill."
+(interactive "_")
+(if (interactive-p)
+(progn
+	(setq this-command 'kill-region)
+	(message "If the next command is a kill, it will append"))
+(setq last-command 'kill-region)))
+(defun yank-pop (arg)
+"Replace just-yanked stretch of killed text with a different stretch.
+This command is allowed only immediately after a `yank' or a `yank-pop'.
+At such a time, the region contains a stretch of reinserted
+previously-killed text.  `yank-pop' deletes that text and inserts in its
+place a different stretch of killed text.
+With no argument, the previous kill is inserted.
+With argument N, insert the Nth previous kill.
+If N is negative, this is a more recent kill.
+The sequence of kills wraps around, so that after the oldest one
+comes the newest one."
+(interactive "*p")
+(if (not (eq last-command 'yank))
+(error "Previous command was not a yank"))
+(setq this-command 'yank)
+(let ((before (< (point) (mark t))))
+(delete-region (point) (mark t))
+(set-mark (point))
+(insert (current-kill arg))
+(if before (exchange-point-and-mark t))))
+(defun yank (&optional arg)
+"Reinsert the last stretch of killed text.
+More precisely, reinsert the stretch of killed text most recently
+killed OR yanked.  Put point at end, and set mark at beginning.
+With just C-u as argument, same but put point at beginning (and mark at end).
+With argument N, reinsert the Nth most recently killed stretch of killed text.
+See also the command \\[yank-pop]."
+(interactive "*P")
+;; If we don't get all the way through, make last-command indicate that
+;; for the following command.
+(setq this-command t)
+(push-mark (point))
+(insert (current-kill (cond
+			 ((listp arg) 0)
+			 ((eq arg '-) -1)
+			 (t (1- arg)))))
+(if (consp arg)
+(exchange-point-and-mark t))
+;; If we do get all the way through, make this-command indicate that.
+(setq this-command 'yank))
+(defun rotate-yank-pointer (arg)
+"Rotate the yanking point in the kill ring.
+With argument, rotate that many kills forward (or backward, if negative)."
+(interactive "p")
+(current-kill arg))
+(defun insert-buffer (buffer)
+"Insert after point the contents of BUFFER.
+Puts mark after the inserted text.
+BUFFER may be a buffer or a buffer name."
+(interactive (list (progn (barf-if-buffer-read-only)
+			    (read-buffer "Insert buffer: "
+					 ;; XEmacs: we have different args
+					 (other-buffer (current-buffer) nil t)
+					 t))))
+(or (bufferp buffer)
+(setq buffer (get-buffer buffer)))
+(let (start end newmark)
+(save-excursion
+(save-excursion
+	(set-buffer buffer)
+	(setq start (point-min) end (point-max)))
+(insert-buffer-substring buffer start end)
+(setq newmark (point)))
+(push-mark newmark))
+nil)
+(defun append-to-buffer (buffer start end)
+"Append to specified buffer the text of the region.
+It is inserted into that buffer before its point.
+When calling from a program, give three arguments:
+BUFFER (or buffer name), START and END.
+START and END specify the portion of the current buffer to be copied."
+(interactive
+;; XEmacs: we have different args to other-buffer
+(list (read-buffer "Append to buffer: " (other-buffer (current-buffer)
+							 nil t))
+	 (region-beginning) (region-end)))
+(let ((oldbuf (current-buffer)))
+(save-excursion
+(set-buffer (get-buffer-create buffer))
+(insert-buffer-substring oldbuf start end))))
+(defun prepend-to-buffer (buffer start end)
+"Prepend to specified buffer the text of the region.
+It is inserted into that buffer after its point.
+When calling from a program, give three arguments:
+BUFFER (or buffer name), START and END.
+START and END specify the portion of the current buffer to be copied."
+(interactive "BPrepend to buffer: \nr")
+(let ((oldbuf (current-buffer)))
+(save-excursion
+(set-buffer (get-buffer-create buffer))
+(save-excursion
+	(insert-buffer-substring oldbuf start end)))))
+(defun copy-to-buffer (buffer start end)
+"Copy to specified buffer the text of the region.
+It is inserted into that buffer, replacing existing text there.
+When calling from a program, give three arguments:
+BUFFER (or buffer name), START and END.
+START and END specify the portion of the current buffer to be copied."
+(interactive "BCopy to buffer: \nr")
+(let ((oldbuf (current-buffer)))
+(save-excursion
+(set-buffer (get-buffer-create buffer))
+(erase-buffer)
+(save-excursion
+	(insert-buffer-substring oldbuf start end)))))
+;FSFmacs
+;(define-error 'mark-inactive "The mark is not active now")
+(defun mark (&optional force buffer)
+"Return this buffer's mark value as integer, or nil if no mark.
+If `zmacs-regions' is true, then this returns nil unless the region is
+currently in the active (highlighted) state.  With an argument of t, this
+returns the mark (if there is one) regardless of the active-region state.
+You should *generally* not use the mark unless the region is active, if
+the user has expressed a preference for the active-region model.
+If you are using this in an editing command, you are most likely making
+a mistake; see the documentation of `set-mark'."
+(setq buffer (decode-buffer buffer))
+;FSFmacs version:
+;  (if (or force (not transient-mark-mode) mark-active mark-even-if-inactive)
+;      (marker-position (mark-marker))
+;    (signal 'mark-inactive nil)))
+(let ((m (mark-marker force buffer)))
+(and m (marker-position m))))
+;;;#### FSFmacs
+;;; Many places set mark-active directly, and several of them failed to also
+;;; run deactivate-mark-hook.  This shorthand should simplify.
+;(defsubst deactivate-mark ()
+;  "Deactivate the mark by setting `mark-active' to nil.
+;\(That makes a difference only in Transient Mark mode.)
+;Also runs the hook `deactivate-mark-hook'."
+;  (if transient-mark-mode
+;      (progn
+;	(setq mark-active nil)
+;	(run-hooks 'deactivate-mark-hook))))
+(defun set-mark (pos &optional buffer)
+"Set this buffer's mark to POS.  Don't use this function!
+That is to say, don't use this function unless you want
+the user to see that the mark has moved, and you want the previous
+mark position to be lost.
+Normally, when a new mark is set, the old one should go on the stack.
+This is why most applications should use push-mark, not set-mark.
+Novice Emacs Lisp programmers often try to use the mark for the wrong
+purposes.  The mark saves a location for the user's convenience.
+Most editing commands should not alter the mark.
+To remember a location for internal use in the Lisp program,
+store it in a Lisp variable.  Example:
+(let ((beg (point))) (forward-line 1) (delete-region beg (point)))."
+(setq buffer (decode-buffer buffer))
+(set-marker (mark-marker t buffer) pos buffer))
+(defvar mark-ring nil
+"The list of former marks of the current buffer, most recent first.")
+(make-variable-buffer-local 'mark-ring)
+(put 'mark-ring 'permanent-local t)
+(defvar mark-ring-max 16
+"*Maximum size of mark ring.  Start discarding off end if gets this big.")
+(defvar global-mark-ring nil
+"The list of saved global marks, most recent first.")
+(defconst global-mark-ring-max 16
+"*Maximum size of global mark ring.  \
+Start discarding off end if gets this big.")
+(defun set-mark-command (arg)
+"Set mark at where point is, or jump to mark.
+With no prefix argument, set mark,  push old mark position on local mark
+ring, and push mark on global mark ring.
+With argument, jump to mark, and pop a new position for mark off the ring
+\(does not affect global mark ring\).
+Novice Emacs Lisp programmers often try to use the mark for the wrong
+purposes.  See the documentation of `set-mark' for more information."
+(interactive "P")
+(if (null arg)
+(push-mark nil nil t)
+(if (null (mark t))
+	(error "No mark set in this buffer")
+(goto-char (mark t))
+(pop-mark))))
+(defun push-mark (&optional location nomsg activate-region buffer)
+"Set mark at LOCATION (point, by default) and push old mark on mark ring.
+If the last global mark pushed was not in the current buffer,
+also push LOCATION on the global mark ring.
+Display `Mark set' unless the optional second arg NOMSG is non-nil.
+Activate mark if optional third arg ACTIVATE-REGION non-nil.
+Novice Emacs Lisp programmers often try to use the mark for the wrong
+purposes.  See the documentation of `set-mark' for more information."
+(setq buffer (decode-buffer buffer))
+(if (null (mark t buffer))
+nil
+;; The save-excursion / set-buffer is necessary because mark-ring
+;; is a buffer local variable
+(save-excursion
+(set-buffer buffer)
+(setq mark-ring (cons (copy-marker (mark-marker t buffer)) mark-ring))
+(if (> (length mark-ring) mark-ring-max)
+	  (progn
+	    (move-marker (car (nthcdr mark-ring-max mark-ring)) nil buffer)
+	    (setcdr (nthcdr (1- mark-ring-max) mark-ring) nil)))))
+(set-mark (or location (point buffer)) buffer)
+;; Now push the mark on the global mark ring.
+(if (or (null global-mark-ring)
+(not (eq (marker-buffer (car global-mark-ring)) buffer)))
+;; The last global mark pushed wasn't in this same buffer.
+(progn
+(setq global-mark-ring (cons (copy-marker (mark-marker t buffer))
+global-mark-ring))
+(if (> (length global-mark-ring) global-mark-ring-max)
+(progn
+(move-marker (car (nthcdr global-mark-ring-max global-mark-ring))
+nil buffer)
+(setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil)))))
+(or nomsg executing-kbd-macro (> (minibuffer-depth) 0)
+(message "Mark set"))
+(if activate-region
+(progn
+	(setq zmacs-region-stays t)
+	(zmacs-activate-region)))
+nil)
+(defun pop-mark ()
+"Pop off mark ring into the buffer's actual mark.
+Does not set point.  Does nothing if mark ring is empty."
+(if mark-ring
+(progn
+	(setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker t)))))
+	(set-mark (car mark-ring))
+	(move-marker (car mark-ring) nil)
+	(if (null (mark t)) (ding))
+	(setq mark-ring (cdr mark-ring)))))
+(define-function 'exchange-dot-and-mark 'exchange-point-and-mark)
+(defun exchange-point-and-mark (&optional dont-activate-region)
+"Put the mark where point is now, and point where the mark is now.
+The mark is activated unless DONT-ACTIVATE-REGION is non-nil."
+(interactive nil)
+(let ((omark (mark t)))
+(if (null omark)
+	(error "No mark set in this buffer"))
+(set-mark (point))
+(goto-char omark)
+(or dont-activate-region (zmacs-activate-region))
+nil))
+(defun mark-something (mark-fn movement-fn arg)
+"internal function used by mark-sexp, mark-word, etc."
+(let (newmark (pushp t))
+(save-excursion
+(if (and (eq last-command mark-fn) (mark))
+	  ;; Extend the previous state in the same direction:
+	  (progn
+	    (if (< (mark) (point)) (setq arg (- arg)))
+	    (goto-char (mark))
+	    (setq pushp nil)))
+(funcall movement-fn arg)
+(setq newmark (point)))
+(if pushp
+	(push-mark newmark nil t)
+;; Do not mess with the mark stack, but merely adjust the previous state:
+(set-mark newmark)
+(activate-region))))
+;(defun transient-mark-mode (arg)
+;  "Toggle Transient Mark mode.
+;With arg, turn Transient Mark mode on if arg is positive, off otherwise.
+;
+;In Transient Mark mode, when the mark is active, the region is highlighted.
+;Changing the buffer \"deactivates\" the mark.
+;So do certain other operations that set the mark
+;but whose main purpose is something else--for example,
+;incremental search, \\[beginning-of-buffer], and \\[end-of-buffer]."
+;  (interactive "P")
+;  (setq transient-mark-mode
+;	(if (null arg)
+;	    (not transient-mark-mode)
+;	  (> (prefix-numeric-value arg) 0))))
+(defun pop-global-mark ()
+"Pop off global mark ring and jump to the top location."
+(interactive)
+;; Pop entries which refer to non-existent buffers.
+(while (and global-mark-ring (not (marker-buffer (car global-mark-ring))))
+(setq global-mark-ring (cdr global-mark-ring)))
+(or global-mark-ring
+(error "No global mark set"))
+(let* ((marker (car global-mark-ring))
+	 (buffer (marker-buffer marker))
+	 (position (marker-position marker)))
+(setq global-mark-ring (nconc (cdr global-mark-ring)
+				  (list (car global-mark-ring))))
+(set-buffer buffer)
+(or (and (>= position (point-min))
+	     (<= position (point-max)))
+	(widen))
+(goto-char position)
+(switch-to-buffer buffer)))
+(defvar next-line-add-newlines t
+"*If non-nil, `next-line' inserts newline to avoid `end of buffer' error.")
+(defun next-line (arg)
+"Move cursor vertically down ARG lines.
+If there is no character in the target line exactly under the current column,
+the cursor is positioned after the character in that line which spans this
+column, or at the end of the line if it is not long enough.
+If there is no line in the buffer after this one, behavior depends on the
+value of `next-line-add-newlines'.  If non-nil, it inserts a newline character
+to create a line, and moves the cursor to that line.  Otherwise it moves the
+cursor to the end of the buffer.
+The command \\[set-goal-column] can be used to create
+a semipermanent goal column to which this command always moves.
+Then it does not try to move vertically.  This goal column is stored
+in `goal-column', which is nil when there is none.
+If you are thinking of using this in a Lisp program, consider
+using `forward-line' instead.  It is usually easier to use
+and more reliable (no dependence on goal column, etc.)."
+(interactive "_p")
+(if (and next-line-add-newlines (= arg 1))
+(let ((opoint (point)))
+	(end-of-line)
+	(if (eobp)
+	    (newline 1)
+	  (goto-char opoint)
+	  (line-move arg)))
+(if (interactive-p)
+	(condition-case nil
+	    (line-move arg)
+	  ((beginning-of-buffer end-of-buffer) (ding nil 'buffer-bound)))
+(line-move arg)))
+nil)
+(defun previous-line (arg)
+"Move cursor vertically up ARG lines.
+If there is no character in the target line exactly over the current column,
+the cursor is positioned after the character in that line which spans this
+column, or at the end of the line if it is not long enough.
+The command \\[set-goal-column] can be used to create
+a semipermanent goal column to which this command always moves.
+Then it does not try to move vertically.
+If you are thinking of using this in a Lisp program, consider using
+`forward-line' with a negative argument instead.  It is usually easier
+to use and more reliable (no dependence on goal column, etc.)."
+(interactive "_p")
+(if (interactive-p)
+(condition-case nil
+	  (line-move (- arg))
+	((beginning-of-buffer end-of-buffer) (ding nil 'buffer-bound)))
+(line-move (- arg)))
+nil)
+(defvar track-eol nil
+"*Non-nil means vertical motion starting at end of line keeps to ends of lines.
+This means moving to the end of each line moved onto.
+The beginning of a blank line does not count as the end of a line.")
+(defvar goal-column nil
+"*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil.")
+(make-variable-buffer-local 'goal-column)
+(defvar temporary-goal-column 0
+"Current goal column for vertical motion.
+It is the column where point was
+at the start of current run of vertical motion commands.
+When the `track-eol' feature is doing its job, the value is 9999.")
+;XEmacs: not yet ported, so avoid compiler warnings
+(eval-when-compile
+(defvar inhibit-point-motion-hooks))
+(defvar line-move-ignore-invisible nil
+"*Non-nil means \\[next-line] and \\[previous-line] ignore invisible lines.
+Outline mode sets this.")
+;; This is the guts of next-line and previous-line.
+;; Arg says how many lines to move.
+(defun line-move (arg)
+;; Don't run any point-motion hooks, and disregard intangibility,
+;; for intermediate positions.
+(let ((inhibit-point-motion-hooks t)
+	(opoint (point))
+	new)
+(unwind-protect
+	(progn
+	  (if (not (or (eq last-command 'next-line)
+		       (eq last-command 'previous-line)))
+	      (setq temporary-goal-column
+		    (if (and track-eol (eolp)
+			     ;; Don't count beg of empty line as end of line
+			     ;; unless we just did explicit end-of-line.
+			     (or (not (bolp)) (eq last-command 'end-of-line)))
+			9999
+		      (current-column))))
+	  (if (and (not (integerp selective-display))
+		   (not line-move-ignore-invisible))
+	      ;; Use just newline characters.
+	      (or (if (> arg 0)
+		      (progn (if (> arg 1) (forward-line (1- arg)))
+			     ;; This way of moving forward ARG lines
+			     ;; verifies that we have a newline after the last one.
+			     ;; It doesn't get confused by intangible text.
+			     (end-of-line)
+			     (zerop (forward-line 1)))
+		    (and (zerop (forward-line arg))
+			 (bolp)))
+		  (signal (if (< arg 0)
+			      'beginning-of-buffer
+			    'end-of-buffer)
+			  nil))
+	    ;; Move by arg lines, but ignore invisible ones.
+	    (while (> arg 0)
+	      (end-of-line)
+	      (and (zerop (vertical-motion 1))
+		   (signal 'end-of-buffer nil))
+	      ;; If the following character is currently invisible,
+	      ;; skip all characters with that same `invisible' property value.
+	      (while (and (not (eobp))
+			  (let ((prop
+				 (get-char-property (point) 'invisible)))
+			    (if (eq buffer-invisibility-spec t)
+				prop
+			      (or (memq prop buffer-invisibility-spec)
+				  (assq prop buffer-invisibility-spec)))))
+		(if (get-text-property (point) 'invisible)
+		    (goto-char (next-single-property-change (point) 'invisible))
+		  (goto-char (next-extent-change (point)))))
+	      (setq arg (1- arg)))
+	    (while (< arg 0)
+	      (beginning-of-line)
+	      (and (zerop (vertical-motion -1))
+		   (signal 'beginning-of-buffer nil))
+	      (while (and (not (bobp))
+			  (let ((prop
+				 (get-char-property (1- (point)) 'invisible)))
+			    (if (eq buffer-invisibility-spec t)
+				prop
+			      (or (memq prop buffer-invisibility-spec)
+				  (assq prop buffer-invisibility-spec)))))
+		(if (get-text-property (1- (point)) 'invisible)
+		    (goto-char (previous-single-property-change (point) 'invisible))
+		  (goto-char (previous-extent-change (point)))))
+	      (setq arg (1+ arg))))
+	  (move-to-column (or goal-column temporary-goal-column)))
+;; Remember where we moved to, go back home,
+;; then do the motion over again
+;; in just one step, with intangibility and point-motion hooks
+;; enabled this time.
+(setq new (point))
+(goto-char opoint)
+(setq inhibit-point-motion-hooks nil)
+(goto-char new)))
+nil)
+;;; Many people have said they rarely use this feature, and often type
+;;; it by accident.  Maybe it shouldn't even be on a key.
+(put 'set-goal-column 'disabled t)
+(defun set-goal-column (arg)
+"Set the current horizontal position as a goal for \\[next-line] and \\[previous-line].
+Those commands will move to this position in the line moved to
+rather than trying to keep the same horizontal position.
+With a non-nil argument, clears out the goal column
+so that \\[next-line] and \\[previous-line] resume vertical motion.
+The goal column is stored in the variable `goal-column'."
+(interactive "_P")
+(if arg
+(progn
+(setq goal-column nil)
+(message "No goal column"))
+(setq goal-column (current-column))
+(message (substitute-command-keys
+	      "Goal column %d (use \\[set-goal-column] with an arg to unset it)")
+	     goal-column))
+nil)
+;;; deleted FSFmacs terminal randomness hscroll-point-visible stuff.
+(defun scroll-other-window-down (lines)
+"Scroll the \"other window\" down.
+For more details, see the documentation for `scroll-other-window'."
+(interactive "P")
+(scroll-other-window
+;; Just invert the argument's meaning.
+;; We can do that without knowing which window it will be.
+(if (eq lines '-) nil
+(if (null lines) '-
+(- (prefix-numeric-value lines))))))
+(defun beginning-of-buffer-other-window (arg)
+"Move point to the beginning of the buffer in the other window.
+Leave mark at previous position.
+With arg N, put point N/10 of the way from the true beginning."
+(interactive "P")
+(let ((orig-window (selected-window))
+	(window (other-window-for-scrolling)))
+;; We use unwind-protect rather than save-window-excursion
+;; because the latter would preserve the things we want to change.
+(unwind-protect
+	(progn
+	  (select-window window)
+	  ;; Set point and mark in that window's buffer.
+	  (beginning-of-buffer arg)
+	  ;; Set point accordingly.
+	  (recenter '(t)))
+(select-window orig-window))))
+(defun end-of-buffer-other-window (arg)
+"Move point to the end of the buffer in the other window.
+Leave mark at previous position.
+With arg N, put point N/10 of the way from the true end."
+(interactive "P")
+;; See beginning-of-buffer-other-window for comments.
+(let ((orig-window (selected-window))
+	(window (other-window-for-scrolling)))
+(unwind-protect
+	(progn
+	  (select-window window)
+	  (end-of-buffer arg)
+	  (recenter '(t)))
+(select-window orig-window))))
+(defun transpose-chars (arg)
+"Interchange characters around point, moving forward one character.
+With prefix arg ARG, effect is to take character before point
+and drag it forward past ARG other characters (backward if ARG negative).
+If no argument and at end of line, the previous two chars are exchanged."
+(interactive "*P")
+(and (null arg) (eolp) (forward-char -1))
+(transpose-subr 'forward-char (prefix-numeric-value arg)))
+(defun transpose-words (arg)
+"Interchange words around point, leaving point at end of them.
+With prefix arg ARG, effect is to take word before or around point
+and drag it forward past ARG other words (backward if ARG negative).
+If ARG is zero, the words around or after point and around or after mark
+are interchanged."
+(interactive "*p")
+(transpose-subr 'forward-word arg))
+(defun transpose-sexps (arg)
+"Like \\[transpose-words] but applies to sexps.
+Does not work on a sexp that point is in the middle of
+if it is a list or string."
+(interactive "*p")
+(transpose-subr 'forward-sexp arg))
+(defun transpose-lines (arg)
+"Exchange current line and previous line, leaving point after both.
+With argument ARG, takes previous line and moves it past ARG lines.
+With argument 0, interchanges line point is in with line mark is in."
+(interactive "*p")
+(transpose-subr #'(lambda (arg)
+		     (if (= arg 1)
+			 (progn
+			   ;; Move forward over a line,
+			   ;; but create a newline if none exists yet.
+			   (end-of-line)
+			   (if (eobp)
+			       (newline)
+			     (forward-char 1)))
+		       (forward-line arg)))
+		  arg))
+(eval-when-compile
+;; avoid byte-compiler warnings...
+(defvar start1)
+(defvar start2)
+(defvar end1)
+(defvar end2))
+; start[12] and end[12] used in transpose-subr-1 below
+(defun transpose-subr (mover arg)
+(let (start1 end1 start2 end2)
+(if (= arg 0)
+	(progn
+	  (save-excursion
+	    (funcall mover 1)
+	    (setq end2 (point))
+	    (funcall mover -1)
+	    (setq start2 (point))
+	    (goto-char (mark t))
+	    (funcall mover 1)
+	    (setq end1 (point))
+	    (funcall mover -1)
+	    (setq start1 (point))
+	    (transpose-subr-1))
+	  (exchange-point-and-mark t)))
+(while (> arg 0)
+(funcall mover -1)
+(setq start1 (point))
+(funcall mover 1)
+(setq end1 (point))
+(funcall mover 1)
+(setq end2 (point))
+(funcall mover -1)
+(setq start2 (point))
+(transpose-subr-1)
+(goto-char end2)
+(setq arg (1- arg)))
+(while (< arg 0)
+(funcall mover -1)
+(setq start2 (point))
+(funcall mover -1)
+(setq start1 (point))
+(funcall mover 1)
+(setq end1 (point))
+(funcall mover 1)
+(setq end2 (point))
+(transpose-subr-1)
+(setq arg (1+ arg)))))
+; start[12] and end[12] used free
+(defun transpose-subr-1 ()
+(if (> (min end1 end2) (max start1 start2))
+(error "Don't have two things to transpose"))
+(let ((word1 (buffer-substring start1 end1))
+	(word2 (buffer-substring start2 end2)))
+(delete-region start2 end2)
+(goto-char start2)
+(insert word1)
+(goto-char (if (< start1 start2) start1
+		 (+ start1 (- (length word1) (length word2)))))
+(delete-char (length word1))
+(insert word2)))
+(defvar comment-column 32
+"*Column to indent right-margin comments to.
+Setting this variable automatically makes it local to the current buffer.
+Each mode establishes a different default value for this variable; you
+can set the value for a particular mode using that mode's hook.")
+(make-variable-buffer-local 'comment-column)
+(defvar comment-start nil
+"*String to insert to start a new comment, or nil if no comment syntax.")
+(defvar comment-start-skip nil
+"*Regexp to match the start of a comment plus everything up to its body.
+If there are any \\(...\\) pairs, the comment delimiter text is held to begin
+at the place matched by the close of the first pair.")
+(defvar comment-end ""
+"*String to insert to end a new comment.
+Should be an empty string if comments are terminated by end-of-line.")
+(defconst comment-indent-hook nil
+"Obsolete variable for function to compute desired indentation for a comment.
+Use `comment-indent-function' instead.
+This function is called with no args with point at the beginning of
+the comment's starting delimiter.")
+(defvar comment-indent-function
+;; XEmacs - add at least one space after the end of the text on the
+;; current line...
+#'(lambda ()
+(save-excursion
+	(beginning-of-line)
+	(let ((eol (save-excursion (end-of-line) (point))))
+	  (and comment-start-skip
+	       (re-search-forward comment-start-skip eol t)
+	       (setq eol (match-beginning 0)))
+	  (goto-char eol)
+	  (skip-chars-backward " \t")
+	  (max comment-column (1+ (current-column))))))
+"Function to compute desired indentation for a comment.
+This function is called with no args with point at the beginning of
+the comment's starting delimiter.")
+(defconst block-comment-start nil
+"*String to insert to start a new comment on a line by itself.
+If nil, use `comment-start' instead.
+Note that the regular expression `comment-start-skip' should skip this string
+as well as the `comment-start' string.")
+(defconst block-comment-end nil
+"*String to insert to end a new comment on a line by itself.
+Should be an empty string if comments are terminated by end-of-line.
+If nil, use `comment-end' instead.")
+(defun indent-for-comment ()
+"Indent this line's comment to comment column, or insert an empty comment."
+(interactive "*")
+(let* ((empty (save-excursion (beginning-of-line)
+				(looking-at "[ \t]*$")))
+	 (starter (or (and empty block-comment-start) comment-start))
+	 (ender (or (and empty block-comment-end) comment-end)))
+(if (null starter)
+	(error "No comment syntax defined")
+(let* ((eolpos (save-excursion (end-of-line) (point)))
+	     cpos indent begpos)
+	(beginning-of-line)
+	(if (re-search-forward comment-start-skip eolpos 'move)
+	    (progn (setq cpos (point-marker))
+		   ;; Find the start of the comment delimiter.
+		   ;; If there were paren-pairs in comment-start-skip,
+		   ;; position at the end of the first pair.
+		   (if (match-end 1)
+		       (goto-char (match-end 1))
+		     ;; If comment-start-skip matched a string with
+		     ;; internal whitespace (not final whitespace) then
+		     ;; the delimiter start at the end of that
+		     ;; whitespace.  Otherwise, it starts at the
+		     ;; beginning of what was matched.
+		     (skip-syntax-backward " " (match-beginning 0))
+		     (skip-syntax-backward "^ " (match-beginning 0)))))
+	(setq begpos (point))
+	;; Compute desired indent.
+	(if (= (current-column)
+	       (setq indent (if comment-indent-hook
+				(funcall comment-indent-hook)
+			      (funcall comment-indent-function))))
+	    (goto-char begpos)
+	  ;; If that's different from current, change it.
+	  (skip-chars-backward " \t")
+	  (delete-region (point) begpos)
+	  (indent-to indent))
+	;; An existing comment?
+	(if cpos
+	    (progn (goto-char cpos)
+		   (set-marker cpos nil))
+	  ;; No, insert one.
+	  (insert starter)
+	  (save-excursion
+	    (insert ender)))))))
+(defun set-comment-column (arg)
+"Set the comment column based on point.
+With no arg, set the comment column to the current column.
+With just minus as arg, kill any comment on this line.
+With any other arg, set comment column to indentation of the previous comment
+and then align or create a comment on this line at that column."
+(interactive "P")
+(if (eq arg '-)
+(kill-comment nil)
+(if arg
+	(progn
+	  (save-excursion
+	    (beginning-of-line)
+	    (re-search-backward comment-start-skip)
+	    (beginning-of-line)
+	    (re-search-forward comment-start-skip)
+	    (goto-char (match-beginning 0))
+	    (setq comment-column (current-column))
+	    (message "Comment column set to %d" comment-column))
+	  (indent-for-comment))
+(setq comment-column (current-column))
+(message "Comment column set to %d" comment-column))))
+(defun kill-comment (arg)
+"Kill the comment on this line, if any.
+With argument, kill comments on that many lines starting with this one."
+;; this function loses in a lot of situations.  it incorrectly recognises
+;; comment delimiters sometimes (ergo, inside a string), doesn't work
+;; with multi-line comments, can kill extra whitespace if comment wasn't
+;; through end-of-line, et cetera.
+(interactive "*P")
+(or comment-start-skip (error "No comment syntax defined"))
+(let ((count (prefix-numeric-value arg)) endc)
+(while (> count 0)
+(save-excursion
+	(end-of-line)
+	(setq endc (point))
+	(beginning-of-line)
+	(and (string< "" comment-end)
+	     (setq endc
+		   (progn
+		     (re-search-forward (regexp-quote comment-end) endc 'move)
+		     (skip-chars-forward " \t")
+		     (point))))
+	(beginning-of-line)
+	(if (re-search-forward comment-start-skip endc t)
+	    (progn
+	      (goto-char (match-beginning 0))
+	      (skip-chars-backward " \t")
+	      (kill-region (point) endc)
+	      ;; to catch comments a line beginnings
+	      (indent-according-to-mode))))
+(if arg (forward-line 1))
+(setq count (1- count)))))
+(defun comment-region (beg end &optional arg)
+"Comment or uncomment each line in the region.
+With just C-u prefix arg, uncomment each line in region.
+Numeric prefix arg ARG means use ARG comment characters.
+If ARG is negative, delete that many comment characters instead.
+Comments are terminated on each line, even for syntax in which newline does
+not end the comment.  Blank lines do not get comments."
+;; if someone wants it to only put a comment-start at the beginning and
+;; comment-end at the end then typing it, C-x C-x, closing it, C-x C-x
+;; is easy enough.  No option is made here for other than commenting
+;; every line.
+(interactive "r\nP")
+(or comment-start (error "No comment syntax is defined"))
+(if (> beg end) (let (mid) (setq mid beg beg end end mid)))
+(save-excursion
+(save-restriction
+(let ((cs comment-start) (ce comment-end)
+	    numarg)
+(if (consp arg) (setq numarg t)
+	  (setq numarg (prefix-numeric-value arg))
+	  ;; For positive arg > 1, replicate the comment delims now,
+	  ;; then insert the replicated strings just once.
+	  (while (> numarg 1)
+	    (setq cs (concat cs comment-start)
+		  ce (concat ce comment-end))
+	    (setq numarg (1- numarg))))
+	;; Loop over all lines from BEG to END.
+(narrow-to-region beg end)
+(goto-char beg)
+(while (not (eobp))
+(if (or (eq numarg t) (< numarg 0))
+	      (progn
+		;; Delete comment start from beginning of line.
+		(if (eq numarg t)
+		    (while (looking-at (regexp-quote cs))
+		      (delete-char (length cs)))
+		  (let ((count numarg))
+		    (while (and (> 1 (setq count (1+ count)))
+				(looking-at (regexp-quote cs)))
+		      (delete-char (length cs)))))
+		;; Delete comment end from end of line.
+(if (string= "" ce)
+		    nil
+		  (if (eq numarg t)
+		      (progn
+			(end-of-line)
+			;; This is questionable if comment-end ends in
+			;; whitespace.  That is pretty brain-damaged,
+			;; though.
+			(skip-chars-backward " \t")
+			(if (and (>= (- (point) (point-min)) (length ce))
+				 (save-excursion
+				   (backward-char (length ce))
+				   (looking-at (regexp-quote ce))))
+			    (delete-char (- (length ce)))))
+		    (let ((count numarg))
+		      (while (> 1 (setq count (1+ count)))
+			(end-of-line)
+			;; This is questionable if comment-end ends in
+			;; whitespace.  That is pretty brain-damaged though
+			(skip-chars-backward " \t")
+			(save-excursion
+			  (backward-char (length ce))
+			  (if (looking-at (regexp-quote ce))
+			      (delete-char (length ce))))))))
+		(forward-line 1))
+	    ;; Insert at beginning and at end.
+(if (looking-at "[ \t]*$") ()
+(insert cs)
+(if (string= "" ce) ()
+(end-of-line)
+(insert ce)))
+(search-forward "\n" nil 'move)))))))
+(defun prefix-region (prefix)
+"Add a prefix string to each line between mark and point."
+(interactive "sPrefix string: ")
+(if prefix
+(let ((count (count-lines (mark) (point))))
+	(goto-char (min (mark) (point)))
+	(while (> count 0)
+(setq count (1- count))
+	  (beginning-of-line 1)
+	  (insert prefix)
+	  (end-of-line 1)
+	  (forward-char 1)))))
+(defun backward-word (arg &optional buffer)
+"Move backward until encountering the end of a word.
+With argument, do this that many times.
+In programs, it is faster to call `forward-word' with negative arg."
+(interactive "_p")
+(forward-word (- arg) buffer))
+(defun mark-word (arg)
+"Set mark arg words away from point."
+(interactive "p")
+(mark-something 'mark-word 'forward-word arg))
+(defun kill-word (arg)
+"Kill characters forward until encountering the end of a word.
+With argument, do this that many times."
+(interactive "*p")
+(kill-region (point) (save-excursion (forward-word arg) (point))))
+(defun backward-kill-word (arg)
+"Kill characters backward until encountering the end of a word.
+With argument, do this that many times."
+(interactive "*p")
+(kill-word (- arg)))
+(defun current-word (&optional strict)
+"Return the word point is on (or a nearby word) as a string.
+If optional arg STRICT is non-nil, return nil unless point is within
+or adjacent to a word.
+If point is not between two word-constituent characters, but immediately
+follows one, move back first.
+Otherwise, if point precedes a word constituent, move forward first.
+Otherwise, move backwards until a word constituent is found and get that word;
+if you a newlines is reached first, move forward instead."
+(save-excursion
+(let ((oldpoint (point)) (start (point)) (end (point)))
+(skip-syntax-backward "w_") (setq start (point))
+(goto-char oldpoint)
+(skip-syntax-forward "w_") (setq end (point))
+(if (and (eq start oldpoint) (eq end oldpoint))
+	  ;; Point is neither within nor adjacent to a word.
+	  (and (not strict)
+(progn
+;; Look for preceding word in same line.
+(skip-syntax-backward "^w_"
+(save-excursion
+(beginning-of-line) (point)))
+(if (bolp)
+		     ;; No preceding word in same line.
+		     ;; Look for following word in same line.
+(progn
+(skip-syntax-forward "^w_"
+					    (save-excursion
+(end-of-line) (point)))
+(setq start (point))
+(skip-syntax-forward "w_")
+(setq end (point)))
+(setq end (point))
+(skip-syntax-backward "w_")
+(setq start (point)))
+		 (buffer-substring start end)))
+(buffer-substring start end)))))
+(defvar fill-prefix nil
+"*String for filling to insert at front of new line, or nil for none.
+Setting this variable automatically makes it local to the current buffer.")
+(make-variable-buffer-local 'fill-prefix)
+(defvar auto-fill-inhibit-regexp nil
+"*Regexp to match lines which should not be auto-filled.")
+(defun do-auto-fill ()
+(let (give-up)
+(or (and auto-fill-inhibit-regexp
+	     (save-excursion (beginning-of-line)
+			     (looking-at auto-fill-inhibit-regexp)))
+	(while (and (not give-up) (> (current-column) fill-column))
+	  ;; Determine where to split the line.
+	  (let ((fill-prefix fill-prefix)
+		(fill-point
+		 (let ((opoint (point))
+		       bounce
+		       (first t))
+		   (save-excursion
+		     (move-to-column (1+ fill-column))
+		     ;; Move back to a word boundary.
+		     (while (or first
+				;; If this is after period and a single space,
+				;; move back once more--we don't want to break
+				;; the line there and make it look like a
+				;; sentence end.
+				(and (not (bobp))
+				     (not bounce)
+				     sentence-end-double-space
+				     (save-excursion (forward-char -1)
+						     (and (looking-at "\\. ")
+							  (not (looking-at "\\.  "))))))
+		       (setq first nil)
+		       (skip-chars-backward "^ \t\n")
+		       ;; If we find nowhere on the line to break it,
+		       ;; break after one word.  Set bounce to t
+		       ;; so we will not keep going in this while loop.
+		       (if (bolp)
+			   (progn
+			     (re-search-forward "[ \t]" opoint t)
+			     (setq bounce t)))
+		       (skip-chars-backward " \t"))
+		     ;; Let fill-point be set to the place where we end up.
+		     (point)))))
+	    ;; I'm not sure why Stig made this change but it breaks
+	    ;; auto filling in at least C mode so I'm taking it back
+	    ;; out.  --cet
+	    ;; XEmacs - adaptive fill.
+	    ;;(maybe-adapt-fill-prefix
+	    ;; (or from (setq from (save-excursion (beginning-of-line)
+	    ;;					 (point))))
+	    ;; (or to   (setq to (save-excursion (beginning-of-line 2)
+	    ;;				       (point))))
+	    ;; t)
+	    ;; If that place is not the beginning of the line,
+	    ;; break the line there.
+	    (if (save-excursion
+		  (goto-char fill-point)
+		  (not (bolp)))
+		(let ((prev-column (current-column)))
+		  ;; If point is at the fill-point, do not `save-excursion'.
+		  ;; Otherwise, if a comment prefix or fill-prefix is inserted,
+		  ;; point will end up before it rather than after it.
+		  (if (save-excursion
+			(skip-chars-backward " \t")
+			(= (point) fill-point))
+		      (indent-new-comment-line)
+		    (save-excursion
+		      (goto-char fill-point)
+		      (indent-new-comment-line)))
+		  ;; If making the new line didn't reduce the hpos of
+		  ;; the end of the line, then give up now;
+		  ;; trying again will not help.
+		  (if (>= (current-column) prev-column)
+		      (setq give-up t)))
+	      ;; No place to break => stop trying.
+	      (setq give-up t)))))))
+(defvar comment-multi-line t ; XEmacs - this works well with adaptive fill
+"*Non-nil means \\[indent-new-comment-line] should continue same comment
+on new line, with no new terminator or starter.
+This is obsolete because you might as well use \\[newline-and-indent].")
+(defun indent-new-comment-line (&optional soft)
+"Break line at point and indent, continuing comment if within one.
+This indents the body of the continued comment
+under the previous comment line.
+This command is intended for styles where you write a comment per line,
+starting a new comment (and terminating it if necessary) on each line.
+If you want to continue one comment across several lines, use \\[newline-and-indent].
+If a fill column is specified, it overrides the use of the comment column
+or comment indentation.
+The inserted newline is marked hard if `use-hard-newlines' is true,
+unless optional argument SOFT is non-nil."
+(interactive)
+(let (comcol comstart)
+(skip-chars-backward " \t")
+(delete-region (point)
+		   (progn (skip-chars-forward " \t")
+			  (point)))
+(if soft (insert ?\n) (newline 1))
+(if fill-prefix
+	(progn
+	  (indent-to-left-margin)
+	  (insert fill-prefix))
+;; #### - Eric Eide reverts to v18 semantics for this function in
+;; fa-extras, which I'm not gonna do.  His changes are to (1) execute
+;; the save-excursion below unconditionally, and (2) uncomment the check
+;; for (not comment-multi-line) further below.  --Stig
+(if (not comment-multi-line)
+	  (save-excursion
+	    (if (and comment-start-skip
+		     (let ((opoint (point)))
+		       (forward-line -1)
+		       (re-search-forward comment-start-skip opoint t)))
+		;; The old line is a comment.
+		;; Set WIN to the pos of the comment-start.
+		;; But if the comment is empty, look at preceding lines
+		;; to find one that has a nonempty comment.
+		;; If comment-start-skip contains a \(...\) pair,
+		;; the real comment delimiter starts at the end of that pair.
+		(let ((win (or (match-end 1) (match-beginning 0))))
+		  (while (and (eolp) (not (bobp))
+			      (let (opoint)
+				(beginning-of-line)
+				(setq opoint (point))
+				(forward-line -1)
+				(re-search-forward comment-start-skip opoint t)))
+		    (setq win (or (match-end 1) (match-beginning 0))))
+		  ;; Indent this line like what we found.
+		  (goto-char win)
+		  (setq comcol (current-column))
+		  (setq comstart
+			(buffer-substring (point) (match-end 0)))))))
+(if (and comcol (not fill-prefix))  ; XEmacs - (ENE) from fa-extras.
+	  (let ((comment-column comcol)
+		(comment-start comstart)
+		(comment-end comment-end))
+	    (and comment-end (not (equal comment-end ""))
+;	       (if (not comment-multi-line)
+		     (progn
+		       (forward-char -1)
+		       (insert comment-end)
+		       (forward-char 1))
+;		 (setq comment-column (+ comment-column (length comment-start))
+;		       comment-start "")
+;		   )
+		 )
+	    (if (not (eolp))
+		(setq comment-end ""))
+	    (insert ?\n)
+	    (forward-char -1)
+	    (indent-for-comment)
+	    (save-excursion
+	      ;; Make sure we delete the newline inserted above.
+	      (end-of-line)
+	      (delete-char 1)))
+	(indent-according-to-mode)))))
+(defun auto-fill-mode (&optional arg)
+"Toggle auto-fill mode.
+With arg, turn auto-fill mode on if and only if arg is positive.
+In Auto-Fill mode, inserting a space at a column beyond `current-fill-column'
+automatically breaks the line at a previous space."
+(interactive "P")
+(prog1 (setq auto-fill-function
+	       (if (if (null arg)
+		       (not auto-fill-function)
+		       (> (prefix-numeric-value arg) 0))
+		   'do-auto-fill
+		   nil))
+(redraw-modeline)))
+;; This holds a document string used to document auto-fill-mode.
+(defun auto-fill-function ()
+"Automatically break line at a previous space, in insertion of text."
+nil)
+(defun turn-on-auto-fill ()
+"Unconditionally turn on Auto Fill mode."
+(auto-fill-mode 1))
+(defun set-fill-column (arg)
+"Set `fill-column' to current column, or to argument if given.
+The variable `fill-column' has a separate value for each buffer."
+(interactive "_P")
+(setq fill-column (if (integerp arg) arg (current-column)))
+(message "fill-column set to %d" fill-column))
+(defun set-selective-display (arg)
+"Set `selective-display' to ARG; clear it if no arg.
+When the value of `selective-display' is a number > 0,
+lines whose indentation is >= that value are not displayed.
+The variable `selective-display' has a separate value for each buffer."
+(interactive "P")
+(if (eq selective-display t)
+(error "selective-display already in use for marked lines"))
+(let ((current-vpos
+	 (save-restriction
+	   (narrow-to-region (point-min) (point))
+	   (goto-char (window-start))
+	   (vertical-motion (window-height)))))
+(setq selective-display
+	  (and arg (prefix-numeric-value arg)))
+(recenter current-vpos))
+(set-window-start (selected-window) (window-start (selected-window)))
+;; #### doesn't localize properly:
+(princ "selective-display set to " t)
+(prin1 selective-display t)
+(princ "." t))
+(defun nuke-selective-display ()
+"Ensure that the buffer is not in selective-display mode.
+If `selective-display' is t, then restore the buffer text to it's original
+state before disabling selective display."
+;; by Stig@hackvan.com
+(interactive)
+(and (eq t selective-display)
+(save-excursion
+	 (save-restriction
+	   (widen)
+	   (goto-char (point-min))
+	   (let ((mod-p (buffer-modified-p))
+		 (buffer-read-only nil))
+	     (while (search-forward "\r" nil t)
+	       (delete-char -1)
+	       (insert "\n"))
+	     (set-buffer-modified-p mod-p)
+	     ))))
+(setq selective-display nil))
+(add-hook 'change-major-mode-hook 'nuke-selective-display)
+(defvar overwrite-mode-textual (purecopy " Ovwrt")
+"The string displayed in the modeline when in overwrite mode.")
+(defvar overwrite-mode-binary (purecopy " Bin Ovwrt")
+"The string displayed in the modeline when in binary overwrite mode.")
+(defun overwrite-mode (arg)
+"Toggle overwrite mode.
+With arg, turn overwrite mode on iff arg is positive.
+In overwrite mode, printing characters typed in replace existing text
+on a one-for-one basis, rather than pushing it to the right.  At the
+end of a line, such characters extend the line.  Before a tab,
+such characters insert until the tab is filled in.
+\\[quoted-insert] still inserts characters in overwrite mode; this
+is supposed to make it easier to insert characters when necessary."
+(interactive "P")
+(setq overwrite-mode
+	(if (if (null arg) (not overwrite-mode)
+	      (> (prefix-numeric-value arg) 0))
+	    'overwrite-mode-textual))
+(redraw-modeline))
+(defun binary-overwrite-mode (arg)
+"Toggle binary overwrite mode.
+With arg, turn binary overwrite mode on iff arg is positive.
+In binary overwrite mode, printing characters typed in replace
+existing text.  Newlines are not treated specially, so typing at the
+end of a line joins the line to the next, with the typed character
+between them.  Typing before a tab character simply replaces the tab
+with the character typed.
+\\[quoted-insert] replaces the text at the cursor, just as ordinary
+typing characters do.
+Note that binary overwrite mode is not its own minor mode; it is a
+specialization of overwrite-mode, entered by setting the
+`overwrite-mode' variable to `overwrite-mode-binary'."
+(interactive "P")
+(setq overwrite-mode
+	(if (if (null arg)
+		(not (eq overwrite-mode 'overwrite-mode-binary))
+	      (> (prefix-numeric-value arg) 0))
+	    'overwrite-mode-binary))
+(redraw-modeline))
+(defvar line-number-mode nil
+"*Non-nil means display line number in modeline.")
+(defun line-number-mode (arg)
+"Toggle Line Number mode.
+With arg, turn Line Number mode on iff arg is positive.
+When Line Number mode is enabled, the line number appears
+in the modeline."
+(interactive "P")
+(setq line-number-mode
+	(if (null arg) (not line-number-mode)
+	  (> (prefix-numeric-value arg) 0)))
+(redraw-modeline))
+(defvar column-number-mode nil
+"*Non-nil means display column number in modeline.")
+(defun column-number-mode (arg)
+"Toggle Column Number mode.
+With arg, turn Column Number mode on iff arg is positive.
+When Column Number mode is enabled, the column number appears
+in the modeline."
+(interactive "P")
+(setq column-number-mode
+	(if (null arg) (not column-number-mode)
+	  (> (prefix-numeric-value arg) 0)))
+(redraw-modeline))
+(defvar blink-matching-paren t
+"*Non-nil means show matching open-paren when close-paren is inserted.")
+(defvar blink-matching-paren-distance 12000
+"*If non-nil, is maximum distance to search for matching open-paren.")
+(defconst blink-matching-delay 1
+"*The number of seconds that `blink-matching-open' will delay at a match.")
+(defconst blink-matching-paren-dont-ignore-comments nil
+"*Non-nil means `blink-matching-paren' should not ignore comments.")
+(defun blink-matching-open ()
+"Move cursor momentarily to the beginning of the sexp before point."
+(interactive "_")
+(and (> (point) (1+ (point-min)))
+blink-matching-paren
+;; Verify an even number of quoting characters precede the close.
+(= 1 (logand 1 (- (point)
+			 (save-excursion
+			   (forward-char -1)
+			   (skip-syntax-backward "/\\")
+			   (point)))))
+(let* ((oldpos (point))
+	      (parse-sexp-ignore-comments t) ; to avoid C++ lossage
+	      (blinkpos)
+	      (mismatch))
+	 (save-excursion
+	   (save-restriction
+	     (if blink-matching-paren-distance
+		 (narrow-to-region (max (point-min)
+					(- (point) blink-matching-paren-distance))
+				   oldpos))
+	     (condition-case ()
+		 (let ((parse-sexp-ignore-comments
+			(and parse-sexp-ignore-comments
+			     (not blink-matching-paren-dont-ignore-comments))))
+		   (setq blinkpos (scan-sexps oldpos -1)))
+	       (error nil)))
+	   (and blinkpos
+		(/= (char-syntax (char-after blinkpos))
+		    ?\$)
+		(setq mismatch
+		      (or (null (matching-paren (char-after blinkpos)))
+			  (/= (char-after (1- oldpos))
+			      (matching-paren (char-after blinkpos))))))
+	   (if mismatch (setq blinkpos nil))
+	   (if blinkpos
+	       (progn
+		(goto-char blinkpos)
+		(if (pos-visible-in-window-p)
+		    (sit-for blink-matching-delay)
+		  (goto-char blinkpos)
+		  (message
+		   "Matches %s"
+		   ;; Show what precedes the open in its line, if anything.
+		   (if (save-excursion
+			 (skip-chars-backward " \t")
+			 (not (bolp)))
+		       (buffer-substring (progn (beginning-of-line) (point))
+					 (1+ blinkpos))
+		     ;; Show what follows the open in its line, if anything.
+		     (if (save-excursion
+			   (forward-char 1)
+			   (skip-chars-forward " \t")
+			   (not (eolp)))
+(buffer-substring blinkpos
+(progn (end-of-line) (point)))
+		       ;; Otherwise show the previous nonblank line,
+		       ;; if there is one.
+		       (if (save-excursion
+			     (skip-chars-backward "\n \t")
+			     (not (bobp)))
+			   (concat
+			    (buffer-substring (progn
+					       (skip-chars-backward "\n \t")
+					       (beginning-of-line)
+					       (point))
+					      (progn (end-of-line)
+						     (skip-chars-backward " \t")
+						     (point)))
+			    ;; Replace the newline and other whitespace with `...'.
+			    "..."
+			    (buffer-substring blinkpos (1+ blinkpos)))
+			 ;; There is nothing to show except the char itself.
+			 (buffer-substring blinkpos (1+ blinkpos))))))))
+	     (cond (mismatch
+		    (message "Mismatched parentheses"))
+		   ((not blink-matching-paren-distance)
+		    (message "Unmatched parenthesis"))))))))
+;Turned off because it makes dbx bomb out.
+(setq blink-paren-function 'blink-matching-open)
+(eval-when-compile (defvar myhelp))	; suppress compiler warning
+(defun set-variable (var val)
+"Set VARIABLE to VALUE.  VALUE is a Lisp object.
+When using this interactively, supply a Lisp expression for VALUE.
+If you want VALUE to be a string, you must surround it with doublequotes.
+If VARIABLE has a `variable-interactive' property, that is used as if
+it were the arg to `interactive' (which see) to interactively read the value."
+(interactive
+(let* ((var (read-variable "Set variable: "))
+	  ;; #### - yucky code replication here.  This should use something
+	  ;; from help.el or hyper-apropos.el
+	  (minibuffer-help-form
+	   '(funcall myhelp))
+	  (myhelp
+	   #'(lambda ()
+	      (with-output-to-temp-buffer "*Help*"
+		(prin1 var)
+		(princ "\nDocumentation:\n")
+		(princ (substring (documentation-property var 'variable-documentation)
+				  1))
+		(if (boundp var)
+		    (let ((print-length 20))
+		      (princ "\n\nCurrent value: ")
+		      (prin1 (symbol-value var))))
+		(save-excursion
+		  (set-buffer standard-output)
+		  (help-mode))
+		nil))))
+(list var
+	   (let ((prop (get var 'variable-interactive)))
+	     (if prop
+		 ;; Use VAR's `variable-interactive' property
+		 ;; as an interactive spec for prompting.
+		 (call-interactively (list 'lambda '(arg)
+					   (list 'interactive prop)
+					   'arg))
+	       (eval-minibuffer (format "Set %s to value: " var)))))))
+(set var val))
+(defun activate-region ()
+"Activate the region, if `zmacs-regions' is true.
+Setting `zmacs-regions' to true causes LISPM-style active regions to be used.
+This function has no effect if `zmacs-regions' is false."
+(interactive)
+(and zmacs-regions (zmacs-activate-region)))
+(defsubst region-exists-p ()
+"Non-nil iff the region exists.
+If active regions are in use (i.e. `zmacs-regions' is true), this means that
+the region is active.  Otherwise, this means that the user has pushed
+a mark in this buffer at some point in the past.
+The functions `region-beginning' and `region-end' can be used to find the
+limits of the region."
+(not (null (mark))))
+(defun region-active-p ()
+"Non-nil iff the region is active.
+If `zmacs-regions' is true, this is equivalent to `region-exists-p'.
+Otherwise, this function always returns false."
+(and zmacs-regions zmacs-region-extent))
+(defun capitalize-region-or-word (arg)
+"Capitalize the selected region or the following word (or ARG words)."
+(interactive "p")
+(if (region-active-p) (capitalize-region (region-beginning) (region-end))
+(capitalize-word arg)))
+(defun upcase-region-or-word (arg)
+"Upcase the selected region or the following word (or ARG words)."
+(interactive "p")
+(if (region-active-p) (upcase-region (region-beginning) (region-end))
+(upcase-word arg)))
+(defun downcase-region-or-word (arg)
+"Downcase the selected region or the following word (or ARG words)."
+(interactive "p")
+(if (region-active-p) (downcase-region (region-beginning) (region-end))
+(downcase-word arg)))
+;;;
+;;; Most of the zmacs code is now in elisp.  The only thing left in C
+;;; are the variables zmacs-regions, zmacs-region-active-p and
+;;; zmacs-region-stays plus the function zmacs_update_region which
+;;; calls the lisp level zmacs-update-region.  It must remain since it
+;;; must be called by core C code.
+;;;
+(defvar zmacs-activate-region-hook nil
+"Function or functions called when the region becomes active;
+see the variable `zmacs-regions'.")
+(defvar zmacs-deactivate-region-hook nil
+"Function or functions called when the region becomes inactive;
+see the variable `zmacs-regions'.")
+(defvar zmacs-update-region-hook nil
+"Function or functions called when the active region changes.
+This is called after each command that sets `zmacs-region-stays' to t.
+See the variable `zmacs-regions'.")
+(defvar zmacs-region-extent nil
+"The extent of the zmacs region; don't use this.")
+(defvar zmacs-region-rectangular-p nil
+"Whether the zmacs region is a rectangle; don't use this.")
+(defun zmacs-make-extent-for-region (region)
+;; Given a region, this makes an extent in the buffer which holds that
+;; region, for highlighting purposes.  If the region isn't associated
+;; with a buffer, this does nothing.
+(let ((buffer nil)
+	(valid (and (extentp zmacs-region-extent)
+		    (extent-object zmacs-region-extent)
+		    (buffer-live-p (extent-object zmacs-region-extent))))
+	start end)
+(cond ((consp region)
+	   (setq start (min (car region) (cdr region))
+		 end (max (car region) (cdr region))
+		 valid (and valid
+			    (eq (marker-buffer (car region))
+				(extent-object zmacs-region-extent)))
+		 buffer (marker-buffer (car region))))
+	  (t
+	   (signal 'error (list "invalid region" region))))
+(if valid
+	nil
+;; The condition case is in case any of the extents are dead or
+;; otherwise incapacitated.
+(condition-case ()
+	  (if (listp zmacs-region-extent)
+	      (mapcar 'delete-extent zmacs-region-extent)
+	    (delete-extent zmacs-region-extent))
+	(error nil)))
+(if valid
+	(set-extent-endpoints zmacs-region-extent start end)
+(setq zmacs-region-extent (make-extent start end buffer))
+;; Make the extent be closed on the right, which means that if
+;; characters are inserted exactly at the end of the extent, the
+;; extent will grow to cover them.  This is important for shell
+;; buffers - suppose one makes a region, and one end is at point-max.
+;; If the shell produces output, that marker will remain at point-max
+;; (its position will increase).  So it's important that the extent
+;; exhibit the same behavior, lest the region covered by the extent
+;; (the visual indication), and the region between point and mark
+;; (the actual region value) become different!
+(set-extent-property zmacs-region-extent 'end-open nil)
+;; use same priority as mouse-highlighting so that conflicts between
+;; the region extent and a mouse-highlighted extent are resolved by
+;; the usual size-and-endpoint-comparison method.
+(set-extent-priority zmacs-region-extent mouse-highlight-priority)
+(set-extent-face zmacs-region-extent 'zmacs-region)
+;; #### It might be better to actually break
+;; default-mouse-track-next-move-rect out of mouse.el so that we
+;; can use its logic here.
+(cond
+(zmacs-region-rectangular-p
+	(setq zmacs-region-extent (list zmacs-region-extent))
+	(default-mouse-track-next-move-rect start end zmacs-region-extent)
+	))
+zmacs-region-extent)))
+(defun zmacs-region-buffer ()
+"Return the buffer containing the zmacs region, or nil."
+;; #### this is horrible and kludgy!  This stuff needs to be rethought.
+(and zmacs-regions zmacs-region-active-p
+(or (marker-buffer (mark-marker t))
+	   (and (extent-live-p zmacs-region-extent)
+	        (buffer-live-p (extent-object zmacs-region-extent))
+	        (extent-object zmacs-region-extent)))))
+(defun zmacs-activate-region ()
+"Make the region between `point' and `mark' be active (highlighted),
+if `zmacs-regions' is true.  Only a very small number of commands
+should ever do this.  Calling this function will call the hook
+`zmacs-activate-region-hook', if the region was previously inactive.
+Calling this function ensures that the region stays active after the
+current command terminates, even if `zmacs-region-stays' is not set.
+Returns t if the region was activated (i.e. if `zmacs-regions' if t)."
+(if (not zmacs-regions)
+nil
+(setq zmacs-region-active-p t
+	  zmacs-region-stays t
+	  zmacs-region-rectangular-p (and (boundp 'mouse-track-rectangle-p)
+					  mouse-track-rectangle-p))
+(if (marker-buffer (mark-marker t))
+	(zmacs-make-extent-for-region (cons (point-marker t) (mark-marker t))))
+(run-hooks 'zmacs-activate-region-hook)
+t))
+(defun zmacs-deactivate-region ()
+"Make the region between `point' and `mark' no longer be active,
+if `zmacs-regions' is true.  You shouldn't need to call this; the
+command loop calls it when appropriate.  Calling this function will
+call the hook `zmacs-deactivate-region-hook', if the region was
+previously active.  Returns t if the region had been active, nil
+otherwise."
+(if (not zmacs-region-active-p)
+nil
+(setq zmacs-region-active-p nil
+	  zmacs-region-stays nil
+	  zmacs-region-rectangular-p nil)
+(if zmacs-region-extent
+	(let ((inhibit-quit t))
+	  (if (listp zmacs-region-extent)
+	      (mapcar 'delete-extent zmacs-region-extent)
+	    (delete-extent zmacs-region-extent))
+	  (setq zmacs-region-extent nil)))
+(run-hooks 'zmacs-deactivate-region-hook)
+t))
+(defun zmacs-update-region ()
+"Update the highlighted region between `point' and `mark'.
+You shouldn't need to call this; the command loop calls it
+when appropriate.  Calling this function will call the hook
+`zmacs-update-region-hook', if the region is active."
+(if zmacs-region-active-p
+(progn
+	(if (marker-buffer (mark-marker t))
+	    (zmacs-make-extent-for-region (cons (point-marker t)
+						(mark-marker t))))
+	(run-hooks 'zmacs-update-region-hook))))
+;;;;;;
+;;;;;; echo area stuff
+;;;;;;
+;;; The `message-stack' is an alist of labels with messages; the first
+;;; message in this list is always in the echo area.  A call to
+;;; `display-message' inserts a label/message pair at the head of the
+;;; list, and removes any other pairs with that label.  Calling
+;;; `clear-message' causes any pair with matching label to be removed,
+;;; and this may cause the displayed message to change or vanish.  If
+;;; the label arg is nil, the entire message stack is cleared.
+;;;
+;;; Message/error filtering will be a little tricker to implement than
+;;; logging, since messages can be built up incrementally
+;;; using clear-message followed by repeated calls to append-message
+;;; (this happens with error messages).  For messages which aren't
+;;; created this way, filtering could be implemented at display-message
+;;; very easily.
+;;;
+;;; Bits of the logging code are borrowed from log-messages.el by
+;;; Robert Potter (rpotter@grip.cis.upenn.edu).
+;; need this to terminate the currently-displayed message
+;; ("Loading simple ...")
+(or (fboundp 'display-message) (send-string-to-terminal "\n"))
+(defvar message-stack nil
+"An alist of label/string pairs representing active echo-area messages.
+The first element in the list is currently displayed in the echo area.
+Do not modify this directly--use the `message' or
+`display-message'/`clear-message' functions.")
+(defvar remove-message-hook 'log-message
+"A function or list of functions to be called when a message is removed
+from the echo area at the bottom of the frame.  The label of the removed
+message is passed as the first argument, and the text of the message
+as the second argument.")
+(defvar log-message-max-size 50000
+"Maximum size of the \" *Message-Log*\" buffer.  See `log-message'.")
+(defvar log-message-ignore-regexps
+'("^Mark set$"
+"^Undo!$"
+"^Quit$"
+"^\\(Beginning\\|End\\) of buffer$"
+"^Fontifying"
+"^\\(Failing \\)?\\([Ww]rapped \\)?\\([Rr]egexp \\)?I-search\\( backward\\)?:"
+"^Mark saved where search started$"
+"^Making completion list"
+"^Matches "					; paren-matching message
+"^Type .* to \\(remove help\\|restore the other\\) window."
+"^M-x .* (bound to key"			; teach-extended-commands
+"^(No changes need to be saved)$"
+"^(No files need saving)$"
+"^\\(Parsing messages\\|Reading attributes\\|Generating summary\\|Building threads\\|Converting\\)\\.\\.\\. [0-9]+$"	; vm
+"^End of message \d+"			; vm
+"^Parsing error messages\\.\\.\\.[0-9]+"	; compile
+"^Parsed [0-9]+ of [0-9]+ ([0-9]+%)$"	; w3
+"^\\(Formatting Summary\\|Reading active file\\|Checking new news\\|Looking for crossposts\\|Marking crossposts\\|MHSPOOL:\\|NNSPOOL:\\|NNTP:\\|\\(Uns\\|S\\)ubscribing new newsgroups\\)\\.\\.\\. *[0-9]+%$"	; gnus
+"^Adding glyphs\\.\\.\\. ([0-9]+%)\\( done\\)?$"	; outl-mouse
+"^->"				        ; bbdb prompt
+)
+"List of regular expressions matching messages which shouldn't be logged.
+See `log-message'.
+Ideally, packages which generate messages which might need to be ignored
+should label them with 'progress, 'prompt, or 'no-log, so they can be
+filtered by the log-message-ignore-labels.")
+(defvar log-message-ignore-labels
+'(help-echo command progress prompt no-log garbage-collecting auto-saving)
+"List of symbols indicating labels of messages which shouldn't be logged.
+See `display-message' for some common labels.  See also `log-message'.")
+;Subsumed by view-lossage
+;(defun show-message-log ()
+;  "Show the \" *Message-Log*\" buffer, which contains old messages and errors."
+;  (interactive)
+;  (pop-to-buffer " *Message-Log*"))
+(defvar log-message-filter-function 'log-message-filter
+"Value must be a function of two arguments: a symbol (label) and
+a string (messsage).  It should return non-nil to indicate a message
+should be logged.  Possible values include 'log-message-filter and
+'log-message-filter-errors-only.")
+(defun log-message-filter (label message)
+"Default value of log-message-filter-function.
+Mesages whose text matches one of the log-message-ignore-regexps
+or whose label appears in log-message-ignore-labels are not saved."
+(let ((r  log-message-ignore-regexps)
+	(ok (not (memq label log-message-ignore-labels))))
+(while (and r ok)
+(if (save-match-data (string-match (car r) message))
+	  (setq ok nil))
+(setq r (cdr r)))
+ok))
+(defun log-message-filter-errors-only (label message)
+"For use as the log-message-filter-function.  Only logs error messages."
+(eq label 'error))
+(defun log-message (label message)
+"Stuff a copy of the message into the \" *Message-Log*\" buffer,
+if it satisfies the log-message-filter-function.
+For use on remove-message-hook."
+(if (and (not noninteractive)
+	   (funcall log-message-filter-function label message))
+(save-excursion
+	(set-buffer (get-buffer-create " *Message-Log*"))
+	(goto-char (point-max))
+	;; (insert (concat (upcase (symbol-name label)) ": "  message "\n"))
+	(insert message "\n")
+	(if (> (point-max) (max log-message-max-size (point-min)))
+	    (progn
+	      ;; trim log to ~90% of max size
+	      (goto-char (max (- (point-max)
+				 (truncate (* 0.9 log-message-max-size)))
+			      (point-min)))
+	      (forward-line 1)
+	      (delete-region (point-min) (point)))))))
+(defun message-displayed-p (&optional return-string frame)
+"Return a non-nil value if a message is presently displayed in the\n\
+minibuffer's echo area.  If optional argument RETURN-STRING is non-nil,\n\
+return a string containing the message, otherwise just return t."
+;; by definition, a message is displayed if the echo area buffer is
+;; non-empty (see also echo_area_active()).  It had better also
+;; be the case that message-stack is nil exactly when the echo area
+;; is non-empty.
+(let ((buffer (get-buffer " *Echo Area*")))
+(and (< (point-min buffer) (point-max buffer))
+	 (if return-string
+	     (buffer-substring nil nil buffer)
+	   t))))
+;;; Returns the string which remains in the echo area, or nil if none.
+;;; If label is nil, the whole message stack is cleared.
+(defun clear-message (&optional label frame stdout-p no-restore)
+"Remove any message with the given LABEL from the message-stack,
+erasing it from the echo area if it's currently displayed there.
+If a message remains at the head of the message-stack and NO-RESTORE
+is nil, it will be displayed.  The string which remains in the echo
+area will be returned, or nil if the message-stack is now empty.
+If LABEL is nil, the entire message-stack is cleared.
+Unless you need the return value or you need to specify a lable,
+you should just use (message nil)."
+(or frame (setq frame (selected-frame)))
+(let ((clear-stream (and message-stack (eq 'stream (frame-type frame)))))
+(remove-message label frame)
+(let ((buffer (get-buffer " *Echo Area*"))
+	  (zmacs-region-stays zmacs-region-stays)) ; preserve from change
+(erase-buffer buffer))
+(if clear-stream
+	(send-string-to-terminal ?\n stdout-p))
+(if no-restore
+	nil			; just preparing to put another msg up
+(if message-stack
+	  (let ((oldmsg  (cdr (car message-stack))))
+	    (raw-append-message oldmsg frame stdout-p)
+	    oldmsg)
+	;; ### should we (redisplay-echo-area) here?  messes some things up.
+	nil))))
+(defun remove-message (&optional label frame)
+;; If label is nil, we want to remove all matching messages.
+;; Must reverse the stack first to log them in the right order.
+(let ((log nil))
+(while (and message-stack
+		(or (null label)	; null label means clear whole stack
+		    (eq label (car (car message-stack)))))
+(setq log (cons (car message-stack) log))
+(setq message-stack (cdr message-stack)))
+(let ((s  message-stack))
+(while (cdr s)
+	(let ((msg (car (cdr s))))
+	  (if (eq label (car msg))
+	      (progn
+		(setq log (cons msg log))
+		(setcdr s (cdr (cdr s))))
+	    (setq s (cdr s))))))
+;; (possibly) log each removed message
+(while log
+(condition-case e
+	  (run-hook-with-args 'remove-message-hook
+			      (car (car log)) (cdr (car log)))
+	(error (setq remove-message-hook nil)
+	       (message "remove-message-hook error: %s" e)
+	       (sit-for 2)
+	       (erase-buffer (get-buffer " *Echo Area*"))
+	       (signal (car e) (cdr e))))
+(setq log (cdr log)))))
+(defun append-message (label message &optional frame stdout-p)
+(or frame (setq frame (selected-frame)))
+;; add a new entry to the message-stack, or modify an existing one
+(let ((top (car message-stack)))
+(if (eq label (car top))
+	(setcdr top (concat (cdr top) message))
+(setq message-stack (cons (cons label message) message-stack))))
+(raw-append-message message frame stdout-p))
+;; really append the message to the echo area.  no fiddling with message-stack.
+(defun raw-append-message (message &optional frame stdout-p)
+(if (eq message "") nil
+(let ((buffer (get-buffer " *Echo Area*"))
+	  (zmacs-region-stays zmacs-region-stays)) ; preserve from change
+(save-excursion
+	(set-buffer buffer)
+	(insert message))
+;; Conditionalizing on the device type in this way is not that clean,
+;; but neither is having a device method, as I originally implemented
+;; it: all non-stream devices behave in the same way.  Perhaps
+;; the cleanest way is to make the concept of a "redisplayable"
+;; device, which stream devices are not.  Look into this more if
+;; we ever create another non-redisplayable device type (e.g.
+;; processes?  printers?).
+;; Don't redisplay the echo area if we are executing a macro.
+(if (not executing-kbd-macro)
+	  (if (eq 'stream (frame-type frame))
+	      (send-string-to-terminal message stdout-p)
+	    (redisplay-echo-area))))))
+(defun display-message (label message &optional frame stdout-p)
+"Print a one-line message at the bottom of the frame.  First argument
+LABEL is an identifier for this message.  MESSAGE is the string to display.
+Use `clear-message' to remove a labelled message.
+Here are some standard labels (those marked with `*' are not logged
+by default--see the `log-message-ignore-labels' variable):
+message       default label used by the `message' function
+error         default label used for reporting errors
+* progress      progress indicators like \"Converting... 45%\"
+* prompt        prompt-like messages like \"I-search: foo\"
+* no-log        messages that should never be logged"
+(clear-message label frame stdout-p t)
+(append-message label message frame stdout-p))
+;;; may eventually be frame-dependent
+(defun current-message-label (frame)
+(if message-stack
+(car (car message-stack))
+nil))
+(defun message (fmt &rest args)
+"Print a one-line message at the bottom of the frame.
+The arguments are the same as to `format'.
+If the only argument is nil, clear any existing message; let the
+minibuffer contents show."
+;; questionable junk in the C code
+;; (if (framep default-minibuffer-frame)
+;;     (make-frame-visible default-minibuffer-frame))
+(if (and (null fmt) (null args))
+(progn
+	(clear-message nil)
+	nil)
+(let ((str (apply 'format fmt args)))
+(display-message 'message str)
+str)))
+;;;;;;
+;;;;;; warning stuff
+;;;;;;
+(defvar log-warning-minimum-level 'info
+"Minimum level of warnings that should be logged.
+The warnings in levels below this are completely ignored, as if they never
+happened.
+The recognized warning levels, in decreasing order of priority, are
+'emergency, 'alert, 'critical, 'error, 'warning, 'notice, 'info, and
+'debug.
+See also `display-warning-minimum-level'.
+You can also control which warnings are displayed on a class-by-class
+basis.  See `display-warning-suppressed-classes' and
+`log-warning-suppressed-classes'.")
+(defvar display-warning-minimum-level 'info
+"Minimum level of warnings that should be displayed.
+The warnings in levels below this are completely ignored, as if they never
+happened.
+The recognized warning levels, in decreasing order of priority, are
+'emergency, 'alert, 'critical, 'error, 'warning, 'notice, 'info, and
+'debug.
+See also `log-warning-minimum-level'.
+You can also control which warnings are displayed on a class-by-class
+basis.  See `display-warning-suppressed-classes' and
+`log-warning-suppressed-classes'.")
+(defvar log-warning-suppressed-classes nil
+"List of classes of warnings that shouldn't be logged or displayed.
+If any of the CLASS symbols associated with a warning is the same as
+any of the symbols listed here, the warning will be completely ignored,
+as it they never happened.
+NOTE: In most circumstances, you should *not* set this variable.
+Set `display-warning-suppressed-classes' instead.  That way the suppressed
+warnings are not displayed but are still unobtrusively logged.
+See also `log-warning-minimum-level' and `display-warning-minimum-level'.")
+(defvar display-warning-suppressed-classes nil
+"List of classes of warnings that shouldn't be displayed.
+If any of the CLASS symbols associated with a warning is the same as
+any of the symbols listed here, the warning will not be displayed.
+The warning will still logged in the *Warnings* buffer (unless also
+contained in `log-warning-suppressed-classes'), but the buffer will
+not be automatically popped up.
+See also `log-warning-minimum-level' and `display-warning-minimum-level'.")
+(defvar warning-count 0
+"Count of the number of warning messages displayed so far.")
+(defconst warning-level-alist '((emergency . 8)
+				(alert . 7)
+				(critical . 6)
+				(error . 5)
+				(warning . 4)
+				(notice . 3)
+				(info . 2)
+				(debug . 1)))
+(defun warning-level-p (level)
+"Non-nil if LEVEL specifies a warning level."
+(and (symbolp level) (assq level warning-level-alist)))
+;; If you're interested in rewriting this function, be aware that it
+;; could be called at arbitrary points in a Lisp program (when a
+;; built-in function wants to issue a warning, it will call out to
+;; this function the next time some Lisp code is evaluated).  Therefore,
+;; this function *must* not permanently modify any global variables
+;; (e.g. the current buffer) except those that specifically apply
+;; to the warning system.
+(defvar before-init-deferred-warnings nil)
+(defun after-init-display-warnings ()
+"Display warnings deferred till after the init file is run.
+Warnings that occur before then are deferred so that warning
+suppression in the .emacs file will be honored."
+(while before-init-deferred-warnings
+(apply 'display-warning (car before-init-deferred-warnings))
+(setq before-init-deferred-warnings
+	  (cdr before-init-deferred-warnings))))
+(add-hook 'after-init-hook 'after-init-display-warnings)
+(defun display-warning (class message &optional level)
+"Display a warning message.
+CLASS should be a symbol describing what sort of warning this is, such
+as `resource' or `key-mapping'.  A list of such symbols is also
+accepted. (Individual classes can be suppressed; see
+`display-warning-suppressed-classes'.) Optional argument LEVEL can
+be used to specify a priority for the warning, other than default priority
+`warning'. (See `display-warning-minimum-level').  The message is
+inserted into the *Warnings* buffer, which is made visible at appropriate
+times."
+(or level (setq level 'warning))
+(or (listp class) (setq class (list class)))
+(check-argument-type 'warning-level-p level)
+(if (not init-file-loaded)
+(setq before-init-deferred-warnings
+	    (cons (list class message level) before-init-deferred-warnings))
+(catch 'ignored
+(let ((display-p t)
+	    (level-num (cdr (assq level warning-level-alist))))
+	(if (< level-num (cdr (assq log-warning-minimum-level
+				    warning-level-alist)))
+	    (throw 'ignored nil))
+	(if (intersection class log-warning-suppressed-classes)
+	    (throw 'ignored nil))
+	(if (< level-num (cdr (assq display-warning-minimum-level
+				    warning-level-alist)))
+	    (setq display-p nil))
+	(if (and display-p
+		 (intersection class display-warning-suppressed-classes))
+	    (setq display-p nil))
+	(save-excursion
+	  (let ((buffer (get-buffer-create "*Warnings*")))
+	    (if display-p
+		;; The C code looks at display-warning-tick to determine
+		;; when it should call `display-warning-buffer'.  Change it
+		;; to get the C code's attention.
+		(setq display-warning-tick (1+ display-warning-tick)))
+	    (set-buffer buffer)
+	    (goto-char (point-max))
+	    (setq warning-count (1+ warning-count))
+	    (princ (format "(%d) (%s/%s) "
+			   warning-count
+			   (mapconcat 'symbol-name class ",")
+			   level) buffer)
+	    (princ message buffer)
+	    (terpri buffer)
+	    (terpri buffer)))))))
+(defun warn (&rest args)
+"Display a warning message.
+The message is constructed by passing all args to `format'.  The message
+is placed in the *Warnings* buffer, which will be popped up at the next
+redisplay.  The class of the warning is `warning'.  See also
+`display-warning'."
+(display-warning 'warning (apply 'format args)))
+(defvar warning-marker nil)
+;; When this function is called by the C code, all non-local exits are
+;; trapped and C-g is inhibited; therefore, it would be a very, very
+;; bad idea for this function to get into an infinite loop.
+(defun display-warning-buffer ()
+"Make the buffer that contains the warnings be visible.
+The C code calls this periodically, right before redisplay."
+(let ((buffer (get-buffer-create "*Warnings*")))
+(if (or (not warning-marker) (not (eq (marker-buffer warning-marker)
+					  buffer)))
+	(progn
+	  (setq warning-marker (make-marker))
+	  (set-marker warning-marker 1 buffer)))
+(set-window-start (display-buffer buffer) warning-marker)
+(set-marker warning-marker (point-max buffer) buffer)))

Mercurial > hg > xemacs-beta

comparison lisp/prim/simple.el @ 0:376386a54a3c r19-14