--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/packages/info.el	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,2412 @@
+;;; info.el --- info package for Emacs.
+;; Keywords: help
+
+;; Copyright (C) 1985, 1986, 1993 Free Software Foundation, Inc.
+
+;; Author: Dave Gillespie <daveg@synaptics.com>
+;;	   Richard Stallman <rms@gnu.ai.mit.edu>
+;; Maintainer: Dave Gillespie <daveg@synaptics.com>
+;; Version: 1.07 of 7/22/93
+
+;; 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: Not synched with FSF.
+
+;; Commentary:
+
+;; This is based on an early Emacs 19 info.el file.
+;;
+;; Note that Info-directory has been replaced by Info-directory-list,
+;; a search path of directories in which to find Info files.
+;; Also, Info tries adding ".info" to a file name if the name itself
+;; is not found.
+;;
+;; See the change log below for further details.
+
+
+;; LCD Archive Entry:
+;; info-dg|Dave Gillespie|daveg@synaptics.com
+;; |Info reader with many enhancements; replaces standard info.el.
+;; |93-07-22|1.07|~/modes/info.el
+
+;; Also available from anonymous FTP on csvax.cs.caltech.edu.
+
+
+;; Change Log:
+
+;; Modified 3/7/1991 by Dave Gillespie:
+;; (Author's address: daveg@synaptics.com or daveg@csvax.cs.caltech.edu)
+;;
+;; Added keys:  i, t, <, >, [, ], {, }, 6, 7, 8, 9, 0.
+;; Look at help for info-mode (type ? in Info) for descriptions.
+;;
+;; If Info-directory-list is undefined and there is no INFOPATH
+;; in the environment, use value of Info-directory for compatibility
+;; with Emacs 18.57.
+;;
+;; All files named "localdir" found in the path are appended to "dir",
+;; the Info directory.  For this to work, "dir" should contain only
+;; one node (Top), and each "localdir" should contain no ^_ or ^L
+;; characters.  Generally they will contain only one or several
+;; additional lines for the top-level menu.  Note that "dir" is
+;; modified in memory each time it is loaded, but not on disk.
+;;
+;; If "dir" contains a line of the form:  "* Locals:"
+;; then the "localdir"s are inserted there instead of at the end.
+
+
+;; Modified 4/3/1991 by Dave Gillespie:
+;;
+;; Added Info-mode-hook (suggested by Sebastian Kremer).
+;; Also added epoch-info-startup/select-hooks from Simon Spero's info.el.
+;;
+;; Added automatic decoding of compressed Info files.
+;; See documentation for the variable Info-suffix-list.  Default is to
+;; run "uncompress" on ".Z" files and "unyabba" on ".Y" files.
+;; (See comp.sources.unix v24i073-076 for yabba/unyabba, a free software
+;; alternative to compress/uncompress.)
+;; Note: "dir" and "localdir" files should not be compressed.
+;;
+;; Changed variables like Info-enable-edit to be settable by M-x set-variable.
+;;
+;; Added Info-auto-advance variable.  If t, SPC and DEL will act like
+;; } and {, i.e., they advance to the next/previous node if at the end
+;; of the buffer.
+;;
+;; Changed `u' to restore point to most recent location in that node.
+;; Added `=' to do this manually at any time.  (Suggested by David Fox).
+;;
+;; Changed `m' and `0-9' to try interpreting menu name as a file name
+;; if not found as a node name.  This allows (dir) menus of the form,
+;;     Emacs::		Cool text editor
+;; as a shorthand for
+;;     Emacs:(emacs).	Cool text editor
+;;
+;; Enhanced `i' to use line-number information in the index.
+;; Added `,' to move among all matches to a previous `i' command.
+;;
+;; Added `a' (Info-annotate) for adding personal notes to any Info node.
+;; Notes are not stored in the actual Info files, but in the user's own
+;; ~/.infonotes file.
+;;
+;; Added Info-footnote-tag, made default be "Ref" instead of "Note".
+;;
+;; Got mouse-click stuff to work under Emacs version 18.  Check it out!
+;; Left and right clicks scroll the Info window.
+;; Middle click goes to clicked-on node, e.g., "Next:", a menu, or a note.
+
+
+;; Modified 6/29/1991 by Dave Gillespie:
+;;
+;; Renamed epoch-info-startup/select-hooks to Info-startup/select-hook.
+;;
+;; Made Info-select-node into a command on the `!' key.
+;;
+;; Added Info-mouse-support user option.
+;;
+;; Cleaned up the implementation of some routines.
+;;
+;; Added special treatment of quoted words in annotations:  The `g'
+;; command for a nonexistent node name scans for an annotation
+;; (in any node of any file) containing that name in quotes:  g foo RET
+;; looks for an annotation containing:  "foo"  or:  <<foo>>
+;; If found, it goes to that file and node.
+;;
+;; Added a call to set up Info-directory-list in Info-find-node to
+;; work around a bug in GNUS where it calls Info-goto-node before info.
+;;
+;; Added completion for `g' command (inspired by Richard Kim's infox.el).
+;; Completion knows all node names for the current file, and all annotation
+;; tags (see above).  It does not complete file names or node names in
+;; other files.
+;;
+;; Added `k' (Info-emacs-key) and `*' (Info-elisp-ref) commands.  You may
+;; wish to bind these to global keys outside of Info mode.
+;;
+;; Allowed localdir files to be full dir-like files; only the menu part
+;; of each localdir is copied.  Also, redundant menu items are omitted.
+;;
+;; Changed Info-history to hold only one entry at a time for each node,
+;; and to be circular so that multiple `l's come back again to the most
+;; recent node.  Note that the format of Info-history entries has changed,
+;; which may interfere with external programs that try to operate on it.
+;; (Also inspired by Kim's infox.el).
+;;
+;; Changed `n', `]', `l', etc. to accept prefix arguments to move several
+;; steps at once.  Most accept negative arguments to move oppositely.
+;;
+;; Changed `?' to bury *Help* buffer afterwards to keep it out of the way.
+;;
+;; Rearranged `?' key's display to be a little better for new users.
+;;
+;; Changed `a' to save whole window configuration and restore on C-c C-c.
+;;
+;; Fixed the bug reported by Bill Reynolds on gnu.emacs.bugs.
+;;
+;; Changed Info-last to restore window-start as well as cursor position.
+;;
+;; Changed middle mouse button in space after end of node to do Info-last
+;; if we got here by following a cross reference, else do Info-global-next.
+;;
+;; Added some new mouse bindings: shift-left = Info-global-next,
+;; shift-right = Info-global-prev, shift-middle = Info-last.
+;;
+;; Fixed Info-follow-reference not to make assumptions about length
+;; of Info-footnote-tag [Linus Tolke].
+;;
+;; Changed default for Info-auto-advance mode to be press-twice-for-next-node.
+;;
+;; Modified x-mouse-ignore to preserve last-command variable, so that
+;; press-twice Info-auto-advance mode works with the mouse.
+
+
+;; Modified 3/4/1992 by Dave Gillespie:
+;;
+;; Added an "autoload" command to help autoload.el.
+;;
+;; Changed `*' command to look for file `elisp' as well as for `lispref'.
+;;
+;; Fixed a bug involving footnote names containing regexp special characters.
+;;
+;; Fixed a bug in completion during `f' (or `r') command.
+;;
+;; Added TAB (Info-next-reference), M-TAB, and RET keys to Info mode.
+;;
+;; Added new bindings, `C-h C-k' for Info-emacs-key and `C-h C-f' for
+;; Info-elisp-ref.  These bindings are made when info.el is loaded, and
+;; only if those key sequences were previously unbound.  These bindings
+;; work at any time, not just when Info is already running.
+
+
+;; Modified 3/8/1992 by Dave Gillespie:
+;;
+;; Fixed some long lines that were causing trouble with mailers.
+
+
+;; Modified 3/9/1992 by Dave Gillespie:
+;;
+;; Added `C-h C-i' (Info-query).
+;;
+;; Added Info-novice mode, warns if the user attempts to switch to
+;; a different Info file.
+;;
+;; Fixed a bug that caused problems using compressed Info files
+;; and Info-directory-list at the same time.
+;;
+;; Disabled Info-mouse-support by default if Epoch or Hyperbole is in use.
+;;
+;; Added an expand-file-name call to Info-find-node to fix a small bug.
+
+
+;; Modified 5/22/1992 by Dave Gillespie:
+;;
+;; Added "standalone" operation:  "emacs -f info" runs Emacs specifically
+;; for use as an Info browser.  In this mode, the `q' key quits Emacs
+;; itself.  Also, "emacs -f info arg" starts in Info file "arg" instead
+;; of "dir".
+;;
+;; Changed to prefer "foo.info" over "foo".  If both exist, "foo" is
+;; probably a directory or executable program!
+;;
+;; Made control-mouse act like regular-mouse does in other buffers.
+;; (In most systems, this will be set-cursor for left-mouse, x-cut
+;; for right-mouse, and x-paste, which will be an error, for
+;; middle-mouse.)
+;;
+;; Improved prompting and searching for `,' key.
+;;
+;; Fixed a bug where some "* Menu:" lines disappeared when "dir"
+;; contained several nodes.
+
+
+;; Modified 9/10/1992 by Dave Gillespie:
+;;
+;; Mixed in support for XEmacs.  Mouse works the same as in
+;; the other Emacs versions by default; added Info-lucid-mouse-style
+;; variable, which enables mouse operation similar to XEmacs's default.
+;;
+;; Fixed a bug where RET couldn't understand "* Foo::" if "Foo" was a
+;; file name instead of a node name.
+;;
+;; Added `x' (Info-bookmark), a simple interface to the annotation
+;; tags feature.  Added `j' (Info-goto-bookmark), like `g' but only
+;; completes bookmarks.
+;;
+;; Added `<<tag>>' as alternate to `"tag"' in annotations.
+;;
+;; Added `v' (Info-visit-file), like Info-goto-node but specialized
+;; for going to a new Info file (with file name completion).
+;;
+;; Added recognition of gzip'd ".z" files.
+
+
+;; Modified 5/9/1993 by Dave Gillespie:
+;;
+;; Merged in various things from FSF's latest Emacs 19 info.el.
+;; Notably:  Added Info-default-directory-list.
+
+
+;; Modified 6/2/1993 by Dave Gillespie:
+;;
+;; Changed to use new suffix ".gz" for gzip files.
+
+
+;; Modified 7/22/1993 by Dave Gillespie:
+;;
+;; Changed Info-footnote-tag to "See" instead of "Ref".
+;;
+;; Extended Info-fontify-node to work with FSF version of Emacs 19.
+
+;; Modified 7/30/1993 by Jamie Zawinski:
+;;
+;; Commented out the tty and fsf19 mouse support, because why bother.
+;; Commented out the politically incorrect version of XEmacs mouse support.
+;; Commented out mouse scrolling bindings because the party line on that
+;;  is "scrollbars are coming soon."
+;; Commented out munging of help-for-help's doc; put it in help.el.
+;; Did Info-edit-map the modern XEmacs way.
+;; Pruned extra cruft from fontification and mouse handling code.
+;; Fixed ASCII-centric bogosity in unreading of events.
+
+;; Modified 8/11/95 by Chuck Thompson:
+;;
+;; Removed any pretense of ever referencing Info-directory since it
+;; wasn't working anyhow.
+
+;; Code:
+
+(defvar Info-inhibit-toolbar nil
+  "*Non-nil means don't use the specialized Info toolbar.")
+
+(defvar Info-novice nil
+  "*Non-nil means to ask for confirmation before switching Info files.")
+
+(defvar Info-history nil
+  "List of info nodes user has visited.
+Each element of list is a list (\"(FILENAME)NODENAME\" BUFPOS WINSTART).")
+
+(defvar Info-keeping-history t
+  "Non-nil if Info-find-node should modify Info-history.
+This is for use only by certain internal Info routines.")
+
+(defvar Info-enable-edit nil
+  "*Non-nil means the \\<Info-mode-map>\\[Info-edit] command in Info
+can edit the current node.
+This is convenient if you want to write info files by hand.
+However, we recommend that you not do this.
+It is better to write a Texinfo file and generate the Info file from that,
+because that gives you a printed manual as well.")
+
+(defvar Info-enable-active-nodes t
+  "*Non-nil allows Info to execute Lisp code associated with nodes.
+The Lisp code is executed when the node is selected.")
+
+(defvar Info-restoring-point t
+  "*Non-nil means to restore the cursor position when re-entering a node.")
+
+(defvar Info-auto-advance 'twice
+  "*Control what SPC and DEL do when they can't scroll any further.
+If nil, they beep and remain in the current node.
+If t, they move to the next node (like Info-global-next/prev).
+If anything else, they must be pressed twice to move to the next node.")
+
+(defvar Info-fontify t
+  "*Non-nil enables font features in XEmacs.
+This variable is ignored unless running under XEmacs.")
+
+(defvar Info-default-directory-list nil
+  "List of default directories to search for Info documentation files.
+This value is used as the default for `Info-directory-list'.  It is set
+in startup.el.")
+
+(defvar Info-directory-list
+  (let ((path (getenv "INFOPATH")))
+    (if path
+	(let ((list nil)
+ 	      idx)
+	  (while (> (length path) 0)
+	    (setq idx (or (string-match ":" path) (length path))
+		  list (cons (substring path 0 idx) list)
+		  path (substring path (min (1+ idx)
+					    (length path)))))
+	  (nreverse list))
+      Info-default-directory-list))
+  "List of directories to search for Info documentation files.
+Default is to use the environment variable INFOPATH if it exists,
+else to use Info-default-directory-list.")
+
+(defvar Info-suffix-list '( (".info" . nil)
+			    (".info.gz" . "gzip -dc %s")
+			    (".info-z" . "gzip -dc %s")
+			    (".info.Z" . "uncompress -c %s")
+			    (".gz" . "gzip -dc %s")
+			    (".Z" . "uncompress -c %s") )
+  "List of file name suffixes and associated decoding commands.
+Each entry should be (SUFFIX . STRING); if STRING contains %s, that is
+changed to name of the file to decode, otherwise the file is given to
+the command as standard input.  If STRING is nil, no decoding is done.")
+
+(defvar Info-footnote-tag "See"
+  "*Symbol that identifies a footnote or cross-reference.
+All \"*Note\" references will be changed to use this word instead.")
+
+(defvar Info-current-file nil
+  "Info file that Info is now looking at, or nil.")
+
+(defvar Info-current-subfile nil
+  "Info subfile that is actually in the *info* buffer now,
+or nil if current info file is not split into subfiles.")
+
+(defvar Info-current-node nil
+  "Name of node that Info is now looking at, or nil.")
+
+(defvar Info-tag-table-marker (make-marker)
+  "Marker pointing at beginning of current Info file's tag table.
+Marker points nowhere if file has no tag table.")
+
+(defvar Info-current-file-completions nil
+  "Cached completion list for current Info file.")
+
+(defvar Info-current-annotation-completions nil
+  "Cached completion list for current annotation files.")
+
+(defvar Info-index-alternatives nil
+  "List of possible matches for last Info-index command.")
+(defvar Info-index-first-alternative nil)
+
+(defvar Info-annotations-path '("~/.infonotes" "/usr/lib/info.notes")
+  "*Names of files that contain annotations for different Info nodes.
+By convention, the first one should reside in your personal directory.
+The last should be a world-writable \"public\" annotations file.")
+
+(defvar Info-standalone nil
+  "Non-nil if Emacs was started solely as an Info browser.")
+
+(defvar Info-in-cross-reference nil)
+(defvar Info-window-configuration nil)
+
+;;;###autoload
+(defun info (&optional file)
+  "Enter Info, the documentation browser.
+Optional argument FILE specifies the file to examine;
+the default is the top-level directory of Info.
+
+In interactive use, a prefix argument directs this command
+to read a file name from the minibuffer."
+  (interactive (if current-prefix-arg
+		   (list (read-file-name "Info file name: " nil nil t))))
+  (let ((p command-line-args))
+    (while p
+      (and (string-match "^-[fe]" (car p))
+	   (equal (nth 1 p) "info")
+	   (not Info-standalone)
+	   (setq Info-standalone t)
+	   (= (length p) 3)
+	   (not (string-match "^-" (nth 2 p)))
+	   (setq file (nth 2 p))
+	   (setq command-line-args-left nil))
+      (setq p (cdr p))))
+;  (Info-setup-x)
+  (if file
+      (unwind-protect
+	  (Info-goto-node (concat "(" file ")"))
+	(and Info-standalone (info)))
+    (if (get-buffer "*info*")
+	(switch-to-buffer "*info*")
+      (Info-directory))))
+
+;;;###autoload
+(defun Info-query (file)
+  "Enter Info, the documentation browser.  Prompt for name of Info file."
+  (interactive "sInfo topic (default = menu): ")
+  (info)
+  (if (equal file "")
+      (Info-goto-node "(dir)")
+    (Info-goto-node (concat "(" file ")"))))
+
+(defun Info-setup-initial ()
+  (let ((f Info-annotations-path))
+    (while f
+      (if (and (file-exists-p (car f)) (not (get-file-buffer (car f))))
+	  (bury-buffer (find-file-noselect (car f))))
+      (setq f (cdr f)))))
+
+(defconst Info-emacs-info-file-name "xemacs")
+
+;; Go to an info node specified as separate filename and nodename.
+;; no-going-back is non-nil if recovering from an error in this function;
+;; it says do not attempt further (recursive) error recovery.
+(defun Info-find-node (filename &optional nodename no-going-back tryfile line)
+  ;; Look for a plausible filename, or if not found then look for URls
+  ;; &c, and dispatch to the appropriate fn.
+
+  (Info-setup-initial)
+
+  (cond 
+   ;; empty filename is simple case
+   ((null filename)
+    (Info-find-file-node nil nodename no-going-back tryfile line))
+   ;; Convert filename to lower case if not found as specified.
+   ;; Expand it, look harder...
+   ((let (temp temp-downcase found 
+	       (fname (substitute-in-file-name filename)))
+      ;; horrible kludge so that I can call the emacs doc
+      ;; "XEmacs" without having to make .../info/dir be ugly.
+      ;; I'd like to do this only if the "emacs" node wasn't
+      ;; found, but this 200+ line function is too hairy for me
+      ;; to want to think about any longer than I have to.
+      (if (equal (downcase fname) "emacs")
+	  (setq fname Info-emacs-info-file-name))
+      (let ((dirs (if (string-match "^\\./" fname)
+		      ;; If specified name starts with `./'
+		      ;; then just try current directory.
+		      (list default-directory) ; '("./")
+		    Info-directory-list)))
+	;; Search the directory list for file FNAME.
+	(while (and dirs (not found))
+	  (setq temp (expand-file-name fname (car dirs)))
+	  (setq temp-downcase
+		(expand-file-name (downcase fname) (car dirs)))
+	  (if (equal temp-downcase temp) (setq temp-downcase nil))
+	  ;; Try several variants of specified name.
+	  ;; Try downcasing, appending a suffix, or both.
+	  (setq found (Info-suffixed-file temp temp-downcase))
+	  (setq dirs (cdr dirs)))
+	(if found 
+	    (progn (setq filename (expand-file-name found))
+		   t))))
+    (Info-find-file-node filename nodename no-going-back tryfile line))
+   ;; Look for a URL.  This pattern is stolen from w3.el to prevent
+   ;; loading it if we won't need it.
+   ((string-match  "^\\(wais\\|solo\\|x-exec\\|newspost\\|www\\|mailto\\|news\\|tn3270\\|ftp\\|http\\|file\\|telnet\\|gopher\\):" filename)
+    (w3-fetch filename))
+   (t
+    (error "Info file %s does not exist" filename))))
+
+(defun Info-find-file-node (filename nodename 
+				     &optional no-going-back tryfile line)
+  ;; This is the guts of what was Info-find-node. Whoever wrote this
+  ;; should be locked up where they can't do any more harm.
+
+  ;; Go into info buffer.
+  (switch-to-buffer "*info*")
+  (if (fboundp 'buffer-disable-undo)
+      (buffer-disable-undo (current-buffer)))
+  (run-hooks 'Info-startup-hook)
+  (or (eq major-mode 'Info-mode)
+      (Info-mode))
+  (or (null filename)
+      (equal Info-current-file filename)
+      (not Info-novice)
+      (string-match "^dir$" (file-name-nondirectory Info-current-file))
+      (if (y-or-n-p (format "Leave Info file `%s'? "
+			    (file-name-nondirectory Info-current-file)))
+	  (message "")
+	(keyboard-quit)))
+  ;; Record the node we are leaving.
+  (if (and Info-current-file (not no-going-back))
+      (Info-history-add Info-current-file Info-current-node (point)))
+  (widen)
+  (setq Info-current-node nil
+	Info-in-cross-reference nil)
+  (unwind-protect
+      (progn
+	;; Switch files if necessary
+	(or (null filename)
+	    (equal Info-current-file filename)
+	    (let ((buffer-read-only nil))
+	      (setq Info-current-file nil
+		    Info-current-subfile nil
+		    Info-index-alternatives nil
+		    Info-current-file-completions nil
+		    buffer-file-name nil)
+	      (erase-buffer)
+	      (Info-insert-file-contents filename t)
+	      ;; Add all "localdir" files in search path to "dir" file.
+	      (if (string-match "^dir$" (file-name-nondirectory filename))
+		  (let ((d Info-directory-list)
+			name (lim -1))
+		    (goto-char (point-max))
+		    (if (re-search-backward "^ *\\* *Locals *: *\n" nil t)
+			(delete-region (match-beginning 0) (match-end 0))
+		      (search-backward "\^L" nil t))
+		    (while d
+		      (setq name (expand-file-name "localdir" (car d)))
+		      (if (or (file-exists-p name)
+			      (file-exists-p
+			       (setq name (concat name ".info"))))
+			  ;; Insert menu part of the file
+			  (let* ((pt (point))
+				 (len (nth 1 (insert-file-contents name))))
+			    ;; be careful to put the local info entries
+			    ;; in the buffer in the order they were found
+			    ;; in the search path.
+			    (goto-char (+ pt len))
+			    (save-excursion
+			      (goto-char pt)
+			      (if (search-forward "* menu:" (+ pt len) t)
+				  (progn
+				    (forward-line 1)
+				    (delete-region pt (point)))))))
+		      (setq d (cdr d)))
+		    ;; Eliminate redundant menu entries.
+		    (goto-char (point-min))
+		    (while (re-search-forward "\n\\* \\([^:\n]*\\):" nil t)
+		      (let ((str (buffer-substring (match-beginning 1)
+						   (match-end 1))))
+			(if (> (point) lim)
+			    (save-excursion
+			      (setq lim (if (search-forward "\^_" nil t)
+					    (point)
+					  (point-max)))))
+			(save-excursion
+			  (if (search-forward (format "\n* %s:" str) lim t)
+			      (let ((pt (- (point) 3 (length str))))
+				(forward-line 1)
+				(delete-region pt (point)))))))))
+	      (set-buffer-modified-p nil)
+	      (setq default-directory (file-name-directory filename))
+	      ;; See whether file has a tag table.  Record the location if yes.
+	      (set-marker Info-tag-table-marker nil)
+	      (goto-char (point-max))
+	      (forward-line -8)
+	      (or (equal nodename "*")
+		  (not (search-forward "\^_\nEnd tag table\n" nil t))
+		  (let (pos)
+		    ;; We have a tag table.  Find its beginning.
+		    ;; Is this an indirect file?
+		    (search-backward "\nTag table:\n")
+		    (setq pos (point))
+		    (if (save-excursion
+			  (forward-line 2)
+			  (looking-at "(Indirect)\n"))
+			;; It is indirect.  Copy it to another buffer
+			;; and record that the tag table is in that buffer.
+			(save-excursion
+			  (let ((buf (current-buffer)))
+			    (set-buffer
+			     (get-buffer-create " *info tag table*"))
+			    (if (fboundp 'buffer-disable-undo)
+				(buffer-disable-undo (current-buffer)))
+			    (setq case-fold-search t)
+			    (erase-buffer)
+			    (insert-buffer-substring buf)
+			    (set-marker Info-tag-table-marker
+					(match-end 0))))
+		     (set-marker Info-tag-table-marker pos))))
+	      (setq Info-current-file
+		    (file-name-sans-versions buffer-file-name))))
+	(if (equal nodename "*")
+	    (progn (setq Info-current-node nodename)
+		   (Info-set-mode-line)
+		   (goto-char (point-min)))
+	  ;; Search file for a suitable node.
+	  (let* ((qnode (regexp-quote nodename))
+		 (regexp (concat "Node: *" qnode " *[,\t\n\177]"))
+		 (guesspos (point-min))
+		 (found t))
+	    ;; First get advice from tag table if file has one.
+	    ;; Also, if this is an indirect info file,
+	    ;; read the proper subfile into this buffer.
+	    (if (marker-position Info-tag-table-marker)
+		(save-excursion
+		  (set-buffer (marker-buffer Info-tag-table-marker))
+		  (goto-char Info-tag-table-marker)
+		  (if (re-search-forward regexp nil t)
+		      (progn
+			(setq guesspos (read (current-buffer)))
+			;; If this is an indirect file,
+			;; determine which file really holds this node
+			;; and read it in.
+			(if (not (eq (current-buffer) (get-buffer "*info*")))
+			    (setq guesspos
+				  (Info-read-subfile guesspos)))))))
+	    (goto-char (max (point-min) (- guesspos 1000)))
+	    ;; Now search from our advised position (or from beg of buffer)
+	    ;; to find the actual node.
+	    (catch 'foo
+	      (while (search-forward "\n\^_" nil t)
+		(forward-line 1)
+		(let ((beg (point)))
+		  (forward-line 1)
+		  (if (re-search-backward regexp beg t)
+		      (throw 'foo t))))
+	      (setq found nil)
+	      (let ((bufs (delq nil (mapcar 'get-file-buffer
+					    Info-annotations-path)))
+		    (pattern (if (string-match "\\`<<.*>>\\'" qnode) qnode
+			       (format "\"%s\"\\|<<%s>>" qnode qnode)))
+		    (pat2 (concat "------ *File: *\\([^ ].*[^ ]\\) *Node: "
+				  "*\\([^ ].*[^ ]\\) *Line: *\\([0-9]+\\)"))
+		    (afile nil) anode aline)
+		(while (and bufs (not anode))
+		  (save-excursion
+		    (set-buffer (car bufs))
+		    (goto-char (point-min))
+		    (if (re-search-forward pattern nil t)
+			(if (re-search-backward pat2 nil t)
+			    (setq afile (buffer-substring (match-beginning 1)
+							  (match-end 1))
+				  anode (buffer-substring (match-beginning 2)
+							  (match-end 2))
+				  aline (string-to-int
+					 (buffer-substring (match-beginning 3)
+							   (match-end 3)))))))
+		  (setq bufs (cdr bufs)))
+		(if anode
+		    (Info-find-node afile anode t nil aline)
+		  (if tryfile
+		      (condition-case nil
+			  (Info-find-node nodename "Top" t)
+			(error nil)))))
+	      (or Info-current-node
+		  (error "No such node: %s" nodename)))
+	    (if found
+		(progn
+		  (Info-select-node)
+		  (goto-char (point-min))
+		  (if line (forward-line line)))))))
+    ;; If we did not finish finding the specified node,
+    ;; go back to the previous one.
+    (or Info-current-node no-going-back
+	(let ((hist (car Info-history)))
+	  ;; The following is no longer safe with new Info-history system
+	  ;; (setq Info-history (cdr Info-history))
+	  (Info-goto-node (car hist) t)
+	  (goto-char (+ (point-min) (nth 1 hist)))))))
+
+(defun Info-history-add (file node point)
+  (if Info-keeping-history
+      (let* ((name (format "(%s)%s" (Info-file-name-only file) node))
+	     (found (assoc name Info-history)))
+	(if found
+	    (setq Info-history (delq found Info-history)))
+	(setq Info-history (cons (list name (- point (point-min))
+				       (and (eq (window-buffer)
+						(current-buffer))
+					    (- (window-start) (point-min))))
+				 Info-history)))))
+
+(defun Info-file-name-only (file)
+  (let ((dir (file-name-directory file))
+	(p Info-directory-list))
+    (while (and p (not (equal (car p) dir)))
+      (setq p (cdr p)))
+    (if p (file-name-nondirectory file) file)))
+
+(defun Info-read-subfile (nodepos)
+  (set-buffer (marker-buffer Info-tag-table-marker))
+  (goto-char (point-min))
+  (search-forward "\n\^_")
+  (let (lastfilepos
+	lastfilename)
+    (forward-line 2)
+    (catch 'foo
+      (while (not (looking-at "\^_"))
+	(if (not (eolp))
+	    (let ((beg (point))
+		  thisfilepos thisfilename)
+	      (search-forward ": ")
+	      (setq thisfilename  (buffer-substring beg (- (point) 2)))
+	      (setq thisfilepos (read (current-buffer)))
+	      ;; read in version 19 stops at the end of number.
+	      ;; Advance to the next line.
+	      (if (eolp)
+		  (forward-line 1))
+	      (if (> thisfilepos nodepos)
+		  (throw 'foo t))
+	      (setq lastfilename thisfilename)
+	      (setq lastfilepos thisfilepos))
+	  (throw 'foo t))))
+    (set-buffer (get-buffer "*info*"))
+    (or (equal Info-current-subfile lastfilename)
+	(let ((buffer-read-only nil))
+	  (setq buffer-file-name nil)
+	  (widen)
+	  (erase-buffer)
+	  (Info-insert-file-contents (Info-suffixed-file
+				      (expand-file-name lastfilename
+							(file-name-directory
+							 Info-current-file)))
+				     t)
+	  (set-buffer-modified-p nil)
+	  (setq Info-current-subfile lastfilename)))
+    (goto-char (point-min))
+    (search-forward "\n\^_")
+    (+ (- nodepos lastfilepos) (point))))
+
+(defun Info-suffixed-file (name &optional name2)
+  (let ((suff Info-suffix-list)
+	(found nil))
+    (while (and suff (not found))
+      (if (file-exists-p (concat name (car (car suff))))
+	  (setq found (concat name (car (car suff))))
+	(if (and name2 (file-exists-p (concat name2 (car (car suff)))))
+	    (setq found (concat name2 (car (car suff))))
+	  (setq suff (cdr suff)))))
+    (or found
+	(and (file-exists-p name) name)
+	(and name2 (file-exists-p name2) name2))))
+
+(defun Info-insert-file-contents (file &optional visit)
+  (setq file (expand-file-name file default-directory))
+  (let ((suff Info-suffix-list))
+    (while (and suff (or (<= (length file) (length (car (car suff))))
+			 (not (equal (substring file
+						(- (length (car (car suff)))))
+				     (car (car suff))))))
+      (setq suff (cdr suff)))
+    (if (stringp (cdr (car suff)))
+	(let ((command (if (string-match "%s" (cdr (car suff)))
+			   (format (cdr (car suff)) file)
+			 (concat (cdr (car suff)) " < " file))))
+	  (message "%s..." command)
+	  (if (eq system-type 'vax-vms)
+	      (call-process command nil t nil)
+	    (call-process shell-file-name nil t nil "-c" command))
+	  (message "")
+	  (if visit
+	      (progn
+		(setq buffer-file-name file)
+		(set-buffer-modified-p nil)
+		(clear-visited-file-modtime))))
+      (insert-file-contents file visit))))
+
+(defun Info-select-node ()
+  "Select the node that point is in, after using `g *' to select whole file."
+  (interactive)
+  (widen)
+  (save-excursion
+   ;; Find beginning of node.
+   (search-backward "\n\^_")
+   (forward-line 2)
+   ;; Get nodename spelled as it is in the node.
+   (re-search-forward "Node:[ \t]*")
+   (setq Info-current-node
+	 (buffer-substring (point)
+			   (progn
+			    (skip-chars-forward "^,\t\n")
+			    (point))))
+   (Info-set-mode-line)
+   ;; Find the end of it, and narrow.
+   (beginning-of-line)
+   (let (active-expression)
+     (narrow-to-region (point)
+		       (if (re-search-forward "\n[\^_\f]" nil t)
+			   (prog1
+			    (1- (point))
+			    (if (looking-at "[\n\^_\f]*execute: ")
+				(progn
+				  (goto-char (match-end 0))
+				  (setq active-expression
+					(read (current-buffer))))))
+			 (point-max)))
+     (or (equal Info-footnote-tag "Note")
+	 (progn
+	   (goto-char (point-min))
+	   (let ((buffer-read-only nil)
+		 (bufmod (buffer-modified-p))
+		 (case-fold-search t))
+	     (while (re-search-forward "\\*Note\\([ \n]\\)" nil t)
+	       (replace-match (concat "*" Info-footnote-tag "\ ")))
+	     (set-buffer-modified-p bufmod))))
+     (Info-reannotate-node)
+     ;; XEmacs: remove v19 test
+     (and Info-fontify
+	  (Info-fontify-node))
+     (run-hooks 'Info-select-hook)
+     (if Info-enable-active-nodes (eval active-expression)))))
+
+(defun Info-set-mode-line ()
+  (setq modeline-buffer-identification
+	(concat
+	 "Info:  ("
+	 (if Info-current-file
+	     (let ((name (file-name-nondirectory Info-current-file)))
+	       (if (string-match "\\.info$" name)
+		   (substring name 0 -5)
+		 name))
+	   "")
+	 ")"
+	 (or Info-current-node ""))))
+
+;; Go to an info node specified with a filename-and-nodename string
+;; of the sort that is found in pointers in nodes.
+
+;;;###autoload
+(defun Info-goto-node (nodename &optional no-going-back tryfile)
+  "Go to info node named NAME.  Give just NODENAME or (FILENAME)NODENAME.
+Actually, the following interpretations of NAME are tried in order:
+    (FILENAME)NODENAME
+    (FILENAME)     (using Top node)
+    NODENAME       (in current file)
+    TAGNAME        (see below)
+    FILENAME       (using Top node)
+where TAGNAME is a string that appears in quotes: \"TAGNAME\", in an
+annotation for any node of any file.  (See `a' and `x' commands.)"
+  (interactive (list (Info-read-node-name "Goto node, file or tag: ")
+		     nil t))
+  (let (filename)
+    (string-match "\\s *\\((\\s *\\([^\t)]*\\)\\s *)\\s *\\|\\)\\(.*\\)"
+		  nodename)
+    (setq filename (if (= (match-beginning 1) (match-end 1))
+		       ""
+		     (substring nodename (match-beginning 2) (match-end 2)))
+	  nodename (substring nodename (match-beginning 3) (match-end 3)))
+    (let ((trim (string-match "\\s *\\'" filename)))
+      (if trim (setq filename (substring filename 0 trim))))
+    (let ((trim (string-match "\\s *\\'" nodename)))
+      (if trim (setq nodename (substring nodename 0 trim))))
+    (Info-find-node (if (equal filename "") nil filename)
+		    (if (equal nodename "") "Top" nodename)
+		    no-going-back (and tryfile (equal filename "")))))
+
+(defun Info-goto-bookmark ()
+  (interactive)
+  
+  (let ((completion-ignore-case nil)
+	(tag (completing-read "Goto tag: "
+			      (Info-build-annotation-completions)
+			      nil t)))
+    (or (equal tag "") (Info-find-node nil (format "<<%s>>" tag)))))
+
+;;;###autoload
+(defun Info-visit-file ()
+  "Directly visit an info file."
+  (interactive)
+  (let* ((insert-default-directory nil)
+	 (file (read-file-name "Goto Info file: " "" "")))
+    (or (equal file "") (Info-find-node (expand-file-name file) "Top"))))
+
+(defun Info-restore-point (&optional always)
+  "Restore point to same location it had last time we were in this node."
+  (interactive "p")
+  (if (or Info-restoring-point always)
+      (let* ((name (format "(%s)%s"
+			   (Info-file-name-only Info-current-file)
+			   Info-current-node))
+	     (p (assoc name Info-history)))
+	(if p (Info-restore-history-entry p)))))
+
+(defun Info-restore-history-entry (entry)
+  (goto-char (+ (nth 1 entry) (point-min)))
+  (and (nth 2 entry)
+       (get-buffer-window (current-buffer))
+       (set-window-start (get-buffer-window (current-buffer))
+			 (+ (nth 2 entry) (point-min)))))
+
+(defun Info-read-node-name (prompt &optional default)
+  (Info-setup-initial)
+  (let* ((completion-ignore-case t)
+	 (nodename (completing-read prompt (Info-build-node-completions))))
+    (if (equal nodename "")
+	(or default
+	    (Info-read-node-name prompt))
+      nodename)))
+
+(defun Info-build-annotation-completions ()
+  (or Info-current-annotation-completions
+      (save-excursion
+	(let ((bufs (delq nil (mapcar 'get-file-buffer
+				      Info-annotations-path)))
+	      (compl nil))
+	  (while bufs
+	    (set-buffer (car bufs))
+	    (goto-char (point-min))
+	    (while (re-search-forward "<<\\(.*\\)>>" nil t)
+	      (setq compl (cons (list (buffer-substring (match-beginning 1)
+							(match-end 1)))
+				compl)))
+	    (setq bufs (cdr bufs)))
+	  (setq Info-current-annotation-completions compl)))))
+
+(defun Info-build-node-completions ()
+  (or Info-current-file-completions
+      (let ((compl (Info-build-annotation-completions)))
+	(save-excursion
+	  (save-restriction
+	    (if (marker-buffer Info-tag-table-marker)
+		(progn
+		  (set-buffer (marker-buffer Info-tag-table-marker))
+		  (goto-char Info-tag-table-marker)
+		  (while (re-search-forward "\nNode: \\(.*\\)\177" nil t)
+		    (setq compl
+			  (cons (list (buffer-substring (match-beginning 1)
+							(match-end 1)))
+				compl))))
+	      (widen)
+	      (goto-char (point-min))
+	      (while (search-forward "\n\^_" nil t)
+		(forward-line 1)
+		(let ((beg (point)))
+		  (forward-line 1)
+		  (if (re-search-backward "Node: *\\([^,\n]*\\) *[,\n\t]"
+					  beg t)
+		      (setq compl 
+			    (cons (list (buffer-substring (match-beginning 1)
+							  (match-end 1)))
+				  compl))))))))
+	(setq Info-current-file-completions compl))))
+
+(defvar Info-last-search nil
+  "Default regexp for \\<Info-mode-map>\\[Info-search] command to search for.")
+
+;;;###autoload
+(defun Info-search (regexp)
+  "Search for REGEXP, starting from point, and select node it's found in."
+  (interactive "sSearch (regexp): ")
+  (if (equal regexp "")
+      (setq regexp Info-last-search)
+    (setq Info-last-search regexp))
+  (let ((found ())
+	(onode Info-current-node)
+	(ofile Info-current-file)
+	(opoint (point))
+	(osubfile Info-current-subfile))
+    (save-excursion
+      (save-restriction
+	(widen)
+	(if (null Info-current-subfile)
+	    (progn (re-search-forward regexp) (setq found (point)))
+	  (condition-case nil
+	      (progn (re-search-forward regexp) (setq found (point)))
+	    (search-failed nil)))))
+    (if (not found) ;can only happen in subfile case -- else would have erred
+	(unwind-protect
+	    (let ((list ()))
+	      (set-buffer (marker-buffer Info-tag-table-marker))
+	      (goto-char (point-min))
+	      (search-forward "\n\^_\nIndirect:")
+	      (save-restriction
+		(narrow-to-region (point)
+				  (progn (search-forward "\n\^_")
+					 (1- (point))))
+		(goto-char (point-min))
+		(search-forward (concat "\n" osubfile ": "))
+		(beginning-of-line)
+		(while (not (eobp))
+		  (re-search-forward "\\(^.*\\): [0-9]+$")
+		  (goto-char (+ (match-end 1) 2))
+		  (setq list (cons (cons (read (current-buffer))
+					 (buffer-substring (match-beginning 1)
+							   (match-end 1)))
+				   list))
+		  (goto-char (1+ (match-end 0))))
+		(setq list (nreverse list)
+		      list (cdr list)))
+	      (while list
+		(message "Searching subfile %s..." (cdr (car list)))
+		(Info-read-subfile (car (car list)))
+		(setq list (cdr list))
+		(goto-char (point-min))
+		(if (re-search-forward regexp nil t)
+		    (setq found (point) list ())))
+	      (if found
+		  (message "")
+		(signal 'search-failed (list regexp))))
+	  (if (not found)
+	      (progn (Info-read-subfile opoint)
+		     (goto-char opoint)
+		     (Info-select-node)))))
+    (widen)
+    (goto-char found)
+    (Info-select-node)
+    (or (and (equal onode Info-current-node)
+	     (equal ofile Info-current-file))
+	(Info-history-add ofile onode opoint))))
+
+;; Extract the value of the node-pointer named NAME.
+;; If there is none, use ERRORNAME in the error message; 
+;; if ERRORNAME is nil, just return nil.
+(defun Info-extract-pointer (name &optional errorname)
+  (save-excursion
+   (goto-char (point-min))
+   (forward-line 1)
+   (let ((case-fold-search t))
+     (if (re-search-backward (concat name ":") nil t)
+	 (progn
+	   (goto-char (match-end 0))
+	   (Info-following-node-name))
+       (if (eq errorname t)
+	   nil
+	 (error (concat "Node has no " (capitalize (or errorname name)))))))))
+
+;; Return the node name in the buffer following point.
+;; ALLOWEDCHARS, if non-nil, goes within [...] to make a regexp
+;; saying which chas may appear in the node name.
+(defun Info-following-node-name (&optional allowedchars)
+  (skip-chars-forward " \t")
+  (buffer-substring
+   (point)
+   (progn
+     (while (looking-at (concat "[" (or allowedchars "^,\t\n") "]"))
+       (skip-chars-forward (concat (or allowedchars "^,\t\n") "("))
+       (if (looking-at "(")
+	   (skip-chars-forward "^)")))
+     (skip-chars-backward " ")
+     (point))))
+
+(defun Info-next (&optional n)
+  "Go to the next node of this node.
+A positive or negative prefix argument moves by multiple nodes."
+  (interactive "p")
+  (or n (setq n 1))
+  (if (< n 0)
+      (Info-prev (- n))
+    (while (>= (setq n (1- n)) 0)
+      (Info-goto-node (Info-extract-pointer "next")))))
+
+(defun Info-prev (&optional n)
+  "Go to the previous node of this node.
+A positive or negative prefix argument moves by multiple nodes."
+  (interactive "p")
+  (or n (setq n 1))
+  (if (< n 0)
+      (Info-next (- n))
+    (while (>= (setq n (1- n)) 0)
+      (Info-goto-node (Info-extract-pointer "prev[ious]*" "previous")))))
+
+(defun Info-up (&optional n)
+  "Go to the superior node of this node.
+A positive prefix argument moves up several times."
+  (interactive "p")
+  (or n (setq n 1))
+  (while (>= (setq n (1- n)) 0)
+    (Info-goto-node (Info-extract-pointer "up")))
+  (if (interactive-p) (Info-restore-point)))
+
+(defun Info-last (&optional n)
+  "Go back to the last node visited.
+With a prefix argument, go to Nth most recently visited node.  History is
+circular; after oldest node, history comes back around to most recent one.
+Argument can be negative to go through the circle in the other direction.
+\(In other words, `l' is like \"undo\" and `C-u - l' is like \"redo\".)"
+  (interactive "p")
+  (or n (setq n 1))
+  (or Info-history
+      (error "This is the first Info node you looked at"))
+  (let ((len (1+ (length Info-history))))
+    (setq n (% (+ n (* len 100)) len)))
+  (if (> n 0)
+      (let ((entry (nth (1- n) Info-history)))
+	(Info-history-add Info-current-file Info-current-node (point))
+	(while (>= (setq n (1- n)) 0)
+	  (setq Info-history (nconc (cdr Info-history)
+				    (list (car Info-history)))))
+	(setq Info-history (cdr Info-history))
+	(let ((Info-keeping-history nil))
+	  (Info-goto-node (car entry)))
+	(Info-restore-history-entry entry))))
+
+(defun Info-directory ()
+  "Go to the Info directory node."
+  (interactive)
+  (Info-find-node "dir" "top"))
+
+(defun Info-follow-reference (footnotename)
+  "Follow cross reference named NAME to the node it refers to.
+NAME may be an abbreviation of the reference name."
+  (interactive
+   (let ((completion-ignore-case t)
+	 completions default (start-point (point)) str i)
+     (save-excursion
+       (goto-char (point-min))
+       (while (re-search-forward (format "\\*%s[ \n\t]*\\([^:]*\\):"
+					 Info-footnote-tag)
+				 nil t)
+	 (setq str (buffer-substring
+		    (match-beginning 1)
+		    (1- (point))))
+	 ;; See if this one should be the default.
+	 (and (null default)
+	      (< (match-beginning 0) start-point)
+	      (<= start-point (point))
+	      (setq default t))
+	 (setq i 0)
+	 (while (setq i (string-match "[ \n\t]+" str i))
+	   (setq str (concat (substring str 0 i) " "
+			     (substring str (match-end 0))))
+	   (setq i (1+ i)))
+	 ;; Record as a completion and perhaps as default.
+	 (if (eq default t) (setq default str))
+	 (setq completions
+	       (cons (cons str nil)
+		     completions))))
+     (if completions
+	 (let ((item (completing-read (if default
+					  (concat "Follow reference named: ("
+						  default ") ")
+					"Follow reference named: ")
+				      completions nil t)))
+	   (if (and (string= item "") default)
+	       (list default)
+	     (list item)))
+       (error "No cross-references in this node"))))
+  (let (target i (str (concat "\\*" Info-footnote-tag " "
+			      (regexp-quote footnotename))))
+    (while (setq i (string-match " " str i))
+      (setq str (concat (substring str 0 i) "\\([ \t\n]+\\)"
+			(substring str (1+ i))))
+      (setq i (+ i 10)))
+    (save-excursion
+      (goto-char (point-min))
+      (or (re-search-forward str nil t)
+	  (error "No cross-reference named %s" footnotename))
+      (goto-char (match-end 1))
+      (setq target
+	    (Info-extract-menu-node-name "Bad format cross reference" t)))
+    (while (setq i (string-match "[ \t\n]+" target i))
+      (setq target (concat (substring target 0 i) " "
+			   (substring target (match-end 0))))
+      (setq i (+ i 1)))
+    (Info-goto-node target)
+    (setq Info-in-cross-reference t)))
+
+(defun Info-next-reference (n)
+  (interactive "p")
+  (let ((pat (format "\\*%s[ \n\t]*\\([^:]*\\):\\|^\\* .*:\\|<<.*>>"
+		     Info-footnote-tag))
+	(case-fold-search nil)
+	(old-pt (point)))
+    (while (< n 0)
+      (save-excursion
+	(goto-char (point-min))
+	(while (re-search-forward pat nil t)
+	  (setq n (1+ n)))
+	(goto-char (point-min))
+	(if (re-search-forward "^\\* Menu:" nil t)
+	    (setq n (1- n)))))
+    (while (>= (setq n (1- n)) 0)
+      (or (eobp) (forward-char 1))
+      (or (re-search-forward pat nil t)
+	  (progn
+	    (goto-char (point-min))
+	    (or (re-search-forward pat nil t)
+		(progn
+		  (goto-char old-pt)
+		  (error "No cross references in this node")))))
+      (goto-char (match-beginning 0))
+      (if (looking-at "\\* Menu:")
+	  (setq n (1+ n))))))
+
+(defun Info-prev-reference (n)
+  (interactive "p")
+  (Info-next-reference (- n)))
+
+(defun Info-extract-menu-node-name (&optional errmessage multi-line)
+  (skip-chars-forward " \t\n")
+  (let ((beg (point))
+	str i)
+    (skip-chars-forward "^:")
+    (forward-char 1)
+    (setq str
+	  (if (looking-at ":")
+	      (buffer-substring beg (1- (point)))
+	    (skip-chars-forward " \t\n")
+	    (Info-following-node-name (if multi-line "^.,\t" "^.,\t\n"))))
+    (while (setq i (string-match "\n" str i))
+      (aset str i ?\ ))
+    str))
+
+(defun Info-menu (menu-item)
+  "Go to node for menu item named (or abbreviated) NAME.
+Completion is allowed, and the menu item point is on is the default."
+  (interactive
+   (let ((completions '())
+	 ;; If point is within a menu item, use that item as the default
+	 (default nil)
+	 (p (point))
+	 (last nil))
+     (save-excursion
+       (goto-char (point-min))
+       (let ((case-fold-search t))
+	 (if (not (search-forward "\n* menu:" nil t))
+	     (error "No menu in this node")))
+       (while (re-search-forward
+		"\n\\* \\([^:\t\n]*\\):" nil t)
+	 (if (and (null default)
+		  (prog1 (if last (< last p) nil)
+		    (setq last (match-beginning 0)))
+		  (<= p last))
+	     (setq default (car (car completions))))
+	 (setq completions (cons (cons (buffer-substring
+					 (match-beginning 1)
+					 (match-end 1))
+				       (match-beginning 1))
+				 completions)))
+       (if (and (null default) last
+		(< last p)
+		(<= p (progn (end-of-line) (point))))
+	   (setq default (car (car completions)))))
+     (let ((item nil))
+       (while (null item)
+	 (setq item (let ((completion-ignore-case t))
+		      (completing-read (if default
+					   (format "Menu item (default %s): "
+						   default)
+					   "Menu item: ")
+				       completions nil t)))
+	 ;; we rely on the fact that completing-read accepts an input
+	 ;; of "" even when the require-match argument is true and ""
+	 ;; is not a valid possibility
+	 (if (string= item "")
+	     (if default
+		 (setq item default)
+	         ;; ask again
+	         (setq item nil))))
+       (list item))))
+  ;; there is a problem here in that if several menu items have the same
+  ;; name you can only go to the node of the first with this command.
+  (Info-goto-node (Info-extract-menu-item menu-item) nil t))
+  
+(defun Info-extract-menu-item (menu-item &optional noerror)
+  (save-excursion
+    (goto-char (point-min))
+    (if (let ((case-fold-search t))
+	  (search-forward "\n* menu:" nil t))
+	(if (or (search-forward (concat "\n* " menu-item ":") nil t)
+		(search-forward (concat "\n* " menu-item) nil t))
+	    (progn
+	      (beginning-of-line)
+	      (forward-char 2)
+	      (Info-extract-menu-node-name))
+	  (and (not noerror) (error "No such item in menu")))
+      (and (not noerror) (error "No menu in this node")))))
+
+;; If COUNT is nil, use the last item in the menu.
+(defun Info-extract-menu-counting (count &optional noerror noindex)
+  (save-excursion
+    (goto-char (point-min))
+    (if (let ((case-fold-search t))
+	  (and (search-forward "\n* menu:" nil t)
+	       (or (not noindex)
+		   (not (string-match "\\<Index\\>" Info-current-node)))))
+	(if (search-forward "\n* " nil t count)
+	    (progn
+	      (or count
+		  (while (search-forward "\n* " nil t)))
+	      (Info-extract-menu-node-name))
+	  (and (not noerror) (error "Too few items in menu")))
+      (and (not noerror) (error "No menu in this node")))))
+
+(defun Info-nth-menu-item (n)
+  "Go to the node of the Nth menu item."
+  (interactive "P")
+  (or n (setq n (- last-command-char ?0)))
+  (if (< n 1) (error "Index must be at least 1"))
+  (Info-goto-node (Info-extract-menu-counting n) nil t))
+
+(defun Info-last-menu-item ()
+  "Go to the node of the tenth menu item."
+  (interactive)
+  (Info-goto-node (Info-extract-menu-counting nil) nil t))
+
+(defun Info-top ()
+  "Go to the Top node of this file."
+  (interactive)
+  (Info-goto-node "Top"))
+
+(defun Info-end ()
+  "Go to the final node in this file."
+  (interactive)
+  (Info-top)
+  (let ((Info-keeping-history nil)
+	node)
+    (Info-last-menu-item)
+    (while (setq node (or (Info-extract-pointer "next" t)
+			  (Info-extract-menu-counting nil t t)))
+      (Info-goto-node node))
+    (or (equal (Info-extract-pointer "up" t) "Top")
+	(let ((executing-kbd-macro ""))   ; suppress messages
+	  (condition-case nil
+	      (Info-global-next 10000)
+	    (error nil))))))
+
+(defun Info-global-next (&optional n)
+  "Go to the next node in this file, traversing node structure as necessary.
+This works only if the Info file is structured as a hierarchy of nodes.
+A positive or negative prefix argument moves by multiple nodes."
+  (interactive "p")
+  (or n (setq n 1))
+  (if (< n 0)
+      (Info-global-prev (- n))
+    (while (>= (setq n (1- n)) 0)
+      (let (node)
+	(cond ((and (string-match "^Top$" Info-current-node)
+		    (setq node (Info-extract-pointer "next" t))
+		    (Info-extract-menu-item node t))
+	       (Info-goto-node node))
+	      ((setq node (Info-extract-menu-counting 1 t t))
+	       (message "Going down...")
+	       (Info-goto-node node))
+	      (t
+	       (let ((Info-keeping-history Info-keeping-history)
+		     (orignode Info-current-node)
+		     (ups ""))
+		 (while (not (Info-extract-pointer "next" t))
+		   (if (and (setq node (Info-extract-pointer "up" t))
+			    (not (equal node "Top")))
+		       (progn
+			 (message "Going%s..." (setq ups (concat ups " up")))
+			 (Info-goto-node node)
+			 (setq Info-keeping-history nil))
+		     (if orignode
+			 (let ((Info-keeping-history nil))
+			   (Info-goto-node orignode)))
+		     (error "Last node in file")))
+		 (Info-next))))))))
+
+(defun Info-page-next (&optional n)
+  "Scroll forward one screenful, or go to next global node.
+A positive or negative prefix argument moves by multiple screenfuls."
+  (interactive "p")
+  (or n (setq n 1))
+  (if (< n 0)
+      (Info-page-prev (- n))
+    (while (>= (setq n (1- n)) 0)
+      (if (pos-visible-in-window-p (point-max))
+	  (progn
+	    (Info-global-next)
+	    (message "Node: %s" Info-current-node))
+	(scroll-up)))))
+
+(defun Info-scroll-next (arg)
+  (interactive "P")
+  (if Info-auto-advance
+      (if (and (pos-visible-in-window-p (point-max))
+	       (not (eq Info-auto-advance t))
+	       (not (eq last-command this-command)))
+	  (message "Hit %s again to go to next node"
+		   (if (= last-command-char 0)
+		       "mouse button"
+		     (key-description (char-to-string last-command-char))))
+	(Info-page-next)
+	(setq this-command 'Info))
+    (scroll-up arg)))
+
+(defun Info-global-prev (&optional n)
+  "Go to the previous node in this file, traversing structure as necessary.
+This works only if the Info file is structured as a hierarchy of nodes.
+A positive or negative prefix argument moves by multiple nodes."
+  (interactive "p")
+  (or n (setq n 1))
+  (if (< n 0)
+      (Info-global-next (- n))
+    (while (>= (setq n (1- n)) 0)
+      (let ((upnode (Info-extract-pointer "up" t))
+	    (prevnode (Info-extract-pointer "prev[ious]*" t)))
+	(if (or (not prevnode)
+		(equal prevnode upnode))
+	    (if (string-match "^Top$" Info-current-node)
+		(error "First node in file")
+	      (message "Going up...")
+	      (Info-up))
+	  (Info-goto-node prevnode)
+	  (let ((downs "")
+		(Info-keeping-history nil)
+		node)
+	    (while (setq node (Info-extract-menu-counting nil t t))
+	      (message "Going%s..." (setq downs (concat downs " down")))
+	      (Info-goto-node node))))))))
+
+(defun Info-page-prev (&optional n)
+  "Scroll backward one screenful, or go to previous global node.
+A positive or negative prefix argument moves by multiple screenfuls."
+  (interactive "p")
+  (or n (setq n 1))
+  (if (< n 0)
+      (Info-page-next (- n))
+    (while (>= (setq n (1- n)) 0)
+      (if (pos-visible-in-window-p (point-min))
+	  (progn
+	    (Info-global-prev)
+	    (message "Node: %s" Info-current-node)
+	    (sit-for 0)
+	    ;;(scroll-up 1)   ; work around bug in pos-visible-in-window-p
+	    ;;(scroll-down 1)
+	    (while (not (pos-visible-in-window-p (point-max)))
+	      (scroll-up)))
+	(scroll-down)))))
+
+(defun Info-scroll-prev (arg)
+  (interactive "P")
+  (if Info-auto-advance
+      (if (and (pos-visible-in-window-p (point-min))
+	       (not (eq Info-auto-advance t))
+	       (not (eq last-command this-command)))
+	  (message "Hit %s again to go to previous node"
+		   (if (= last-command-char 0)
+		       "mouse button"
+		     (key-description (char-to-string last-command-char))))
+	(Info-page-prev)
+	(setq this-command 'Info))
+    (scroll-down arg)))
+
+(defun Info-index (topic)
+  "Look up a string in the index for this file.
+The index is defined as the first node in the top-level menu whose
+name contains the word \"Index\", plus any immediately following
+nodes whose names also contain the word \"Index\".
+If there are no exact matches to the specified topic, this chooses
+the first match which is a case-insensitive substring of a topic.
+Use the `,' command to see the other matches.
+Give a blank topic name to go to the Index node itself."
+  (interactive "sIndex topic: ")
+  (let ((pattern (format "\n\\* \\([^\n:]*%s[^\n:]*\\):[ \t]*%s"
+			 (regexp-quote topic)
+			 "\\([^.\n]*\\)\\.[ t]*\\([0-9]*\\)"))
+	node)
+    (message "Searching index for `%s'..." topic)
+    (Info-goto-node "Top")
+    (let ((case-fold-search t))
+      (or (search-forward "\n* menu:" nil t)
+	  (error "No index"))
+      (or (re-search-forward "\n\\* \\(.*\\<Index\\>\\)" nil t)
+	  (error "No index")))
+    (goto-char (match-beginning 1))
+    (let ((Info-keeping-history nil)
+	  (Info-fontify (and Info-fontify (equal topic ""))))
+      (Info-goto-node (Info-extract-menu-node-name)))
+    (or (equal topic "")
+	(let ((matches nil)
+	      (exact nil)
+	      (Info-keeping-history nil)
+	      found)
+	  (while
+	      (progn
+		(goto-char (point-min))
+		(while (re-search-forward pattern nil t)
+		  (setq matches
+			(cons (list (buffer-substring (match-beginning 1)
+						      (match-end 1))
+				    (buffer-substring (match-beginning 2)
+						      (match-end 2))
+				    Info-current-node
+				    (string-to-int (concat "0"
+							   (buffer-substring
+							    (match-beginning 3)
+							    (match-end 3)))))
+			      matches)))
+		(and (setq node (Info-extract-pointer "next" t))
+		     (string-match "\\<Index\\>" node)))
+	    (let ((Info-fontify nil))
+	      (Info-goto-node node)))
+	  (or matches
+	      (progn
+		(Info-last)
+		(error "No \"%s\" in index" topic)))
+	  ;; Here it is a feature that assoc is case-sensitive.
+	  (while (setq found (assoc topic matches))
+	    (setq exact (cons found exact)
+		  matches (delq found matches)))
+	  (setq Info-index-alternatives (nconc exact (nreverse matches))
+		Info-index-first-alternative (car Info-index-alternatives))
+	  (Info-index-next 0)))))
+
+(defun Info-index-next (num)
+  "Go to the next matching index item from the last `i' command."
+  (interactive "p")
+  (or Info-index-alternatives
+      (error "No previous `i' command in this file"))
+  (while (< num 0)
+    (setq num (+ num (length Info-index-alternatives))))
+  (while (> num 0)
+    (setq Info-index-alternatives
+	  (nconc (cdr Info-index-alternatives)
+		 (list (car Info-index-alternatives)))
+	  num (1- num)))
+  (Info-goto-node (nth 1 (car Info-index-alternatives)))
+  (if (> (nth 3 (car Info-index-alternatives)) 0)
+      (forward-line (nth 3 (car Info-index-alternatives)))
+    (forward-line 3)  ; don't search in headers
+    (let ((name (car (car Info-index-alternatives))))
+      (if (or (re-search-forward (format
+				  "\\(Function\\|Command\\): %s\\( \\|$\\)"
+				  (regexp-quote name)) nil t)
+	      (re-search-forward (format "^`%s[ ']" (regexp-quote name)) nil t)
+	      (search-forward (format "`%s'" name) nil t)
+	      (and (string-match "\\`.*\\( (.*)\\)\\'" name)
+		   (search-forward
+		    (format "`%s'" (substring name 0 (match-beginning 1)))
+		    nil t))
+	      (search-forward name nil t))
+	  (beginning-of-line)
+	(goto-char (point-min)))))
+  (message "Found \"%s\" in %s.  %s"
+	   (car (car Info-index-alternatives))
+	   (nth 2 (car Info-index-alternatives))
+	   (if (cdr Info-index-alternatives)
+	       (if (eq (car (cdr Info-index-alternatives))
+		       Info-index-first-alternative)
+		   "(Press `,' to repeat)"
+		 (format "(Press `,' for %d more)"
+			 (- (1- (length Info-index-alternatives))
+			    (length (memq Info-index-first-alternative
+					  (cdr Info-index-alternatives))))))
+	     "(Only match)")))
+
+
+;;;###autoload
+(defun Info-emacs-command (command)
+  "Look up an Emacs command in the Emacs manual in the Info system.
+This command is designed to be used whether you are already in Info or not."
+  (interactive "CLook up command in Emacs manual: ")
+  (save-window-excursion
+    (info)
+    (Info-find-node Info-emacs-info-file-name "Top")
+    (Info-index (symbol-name command)))
+  (pop-to-buffer "*info*"))
+
+;;;###autoload
+(defun Info-goto-emacs-command-node (key)
+  "Look up an Emacs command in the Emacs manual in the Info system.
+This command is designed to be used whether you are already in Info or not."
+  (interactive "CLook up command in Emacs manual: ")
+  (Info-emacs-command key))
+
+;;;###autoload
+(defun Info-goto-emacs-key-command-node (key)
+  "Look up an Emacs key sequence in the Emacs manual in the Info system.
+This command is designed to be used whether you are already in Info or not."
+  (interactive "kLook up key in Emacs manual: ")
+  (let ((command (key-binding key)))
+    (cond ((eq command 'keyboard-quit)
+	   (keyboard-quit))
+	  ((null command)
+	   (error "%s is undefined" (key-description key)))
+	  ((and (interactive-p) (eq command 'execute-extended-command))
+	   (call-interactively 'Info-goto-emacs-command-node))
+	  (t
+	   (Info-goto-emacs-command-node command)))))
+
+;;;###autoload
+(defun Info-emacs-key (key)
+  "Look up an Emacs key sequence in the Emacs manual in the Info system.
+This command is designed to be used whether you are already in Info or not."
+  (interactive "kLook up key in Emacs manual: ")
+  (cond ((eq (key-binding key) 'keyboard-quit)
+	 (keyboard-quit))
+	((and (interactive-p) (eq (key-binding key) 'execute-extended-command))
+	 (call-interactively 'Info-goto-emacs-command-node))
+	(t
+	 (save-window-excursion
+	   (info)
+	   (Info-find-node Info-emacs-info-file-name "Top")
+	   (setq key (key-description key))
+	   (let (p)
+	     (if (setq p (string-match "[@{}]" key))
+		 (setq key (concat (substring key 0 p) "@" (substring key p))))
+	     (if (string-match "^ESC " key)
+		 (setq key (concat "M-" (substring key 4))))
+	     (if (string-match "^M-C-" key)
+		 (setq key (concat "C-M-" (substring key 4)))))
+	   (Info-index key))
+	 (pop-to-buffer "*info*"))))
+
+;;;###autoload
+(defun Info-elisp-ref (func)
+  "Look up an Emacs Lisp function in the Elisp manual in the Info system.
+This command is designed to be used whether you are already in Info or not."
+  (interactive (let ((fn (function-called-at-point))
+		     (enable-recursive-minibuffers t)	     
+		     val)
+		 (setq val (completing-read
+			    (format "Look up Emacs Lisp function%s: "
+				    (if fn
+					(format " (default %s)" fn)
+				      ""))
+			    obarray 'fboundp t))
+		 (list (if (equal val "")
+			   fn (intern val)))))
+  (save-window-excursion
+    (info)
+    (condition-case nil
+	(Info-find-node "elisp" "Top")
+      (error (Info-find-node "lispref" "Top")))
+    (Info-index (symbol-name func)))
+  (pop-to-buffer "*info*"))
+
+(defun Info-reannotate-node ()
+  (let ((bufs (delq nil (mapcar 'get-file-buffer Info-annotations-path))))
+    (if bufs
+	(let ((ibuf (current-buffer))
+	      (file (concat "\\(" (regexp-quote
+			     (file-name-nondirectory Info-current-file))
+			    "\\|" (regexp-quote Info-current-file) "\\)"))
+	      (node (regexp-quote Info-current-node))
+	      (savept (point)))
+	  (goto-char (point-min))
+	  (if (search-forward "\n------ NOTE:\n" nil t)
+	      (let ((buffer-read-only nil)
+		    (bufmod (buffer-modified-p))
+		    top)
+		(setq savept (copy-marker savept))
+		(goto-char (point-min))
+		(while (search-forward "\n------ NOTE:" nil t)
+		  (setq top (1+ (match-beginning 0)))
+		  (if (search-forward "\n------\n" nil t)
+		      (delete-region top (point)))
+		  (backward-char 1))
+		(set-buffer-modified-p bufmod)))
+	  (save-excursion
+	    (while bufs
+	      (set-buffer (car bufs))
+	      (goto-char (point-min))
+	      (while (re-search-forward
+		      (format
+		       "------ *File: *%s *Node: *%s *Line: *\\([0-9]+\\) *\n"
+		       file node)
+		      nil t)
+		(let ((line (string-to-int
+			     (buffer-substring (match-beginning 2)
+					       (match-end 2))))
+		      (top (point))
+		      bot)
+		  (search-forward "\n------\n" nil t)
+		  (setq bot (point))
+		  (save-excursion
+		    (set-buffer ibuf)
+		    (if (integerp savept) (setq savept (copy-marker savept)))
+		    (if (= line 0)
+			(goto-char (point-max))
+		      (goto-char (point-min))
+		      (forward-line line))
+		    (let ((buffer-read-only nil)
+			  (bufmod (buffer-modified-p)))
+		      (insert "------ NOTE:\n")
+		      (insert-buffer-substring (car bufs) top bot)
+		      (set-buffer-modified-p bufmod)))))
+	      (setq bufs (cdr bufs))))
+	  (goto-char savept)))))
+
+(defvar Info-annotate-map nil
+  "Local keymap used within `a' command of Info.")
+(if Info-annotate-map
+    nil
+  ;; (setq Info-annotate-map (nconc (make-sparse-keymap) text-mode-map))
+  (setq Info-annotate-map (copy-keymap text-mode-map))
+  (define-key Info-annotate-map "\C-c\C-c" 'Info-cease-annotate))
+
+(defun Info-annotate-mode ()
+  "Major mode for adding an annotation to an Info node.
+Like text mode with the addition of Info-cease-annotate
+which returns to Info mode for browsing.
+\\{Info-annotate-map}")
+
+(defun Info-annotate (arg)
+  "Add a personal annotation to the current Info node.
+Only you will be able to see this annotation.
+Annotations are stored in the file ~/.infonotes by default.
+If point is inside an existing annotation, edit that annotation.
+A prefix argument specifies which annotations file (from
+Info-annotations-path) is to be edited; default is 1."
+  (interactive "p")
+  (setq arg (1- arg))
+  (if (or (< arg 0) (not (nth arg Info-annotations-path)))
+      (if (= arg 0)
+	  (setq Info-annotations-path
+		(list (read-file-name
+		       "Annotations file: " "~/" "~/.infonotes")))
+	(error "File number must be in the range from 1 to %d"
+	       (length Info-annotations-path))))
+  (let ((which nil)
+	(file (file-name-nondirectory Info-current-file))
+	(d Info-directory-list)
+	where pt)
+    (while (and d (not (equal (expand-file-name file (car d))
+			      Info-current-file)))
+      (setq d (cdr d)))
+    (or d (setq file Info-current-file))
+    (if (and (save-excursion
+	       (goto-char (min (point-max) (+ (point) 13)))
+	       (and (search-backward "------ NOTE:\n" nil t)
+		    (setq pt (match-end 0))
+		    (search-forward "\n------\n" nil t)))
+	     (< (point) (match-end 0)))
+	(setq which (format "File: *%s *Node: *%s *Line:.*\n%s"
+			    (regexp-quote file)
+			    (regexp-quote Info-current-node)
+			    (regexp-quote
+			     (buffer-substring pt (match-beginning 0))))
+	      where (max (- (point) pt) 0)))
+    (let ((node Info-current-node)
+	  (line (if (looking-at "[ \n]*\\'") 0
+		  (count-lines (point-min) (point)))))
+      (or which
+	  (let ((buffer-read-only nil)
+		(bufmod (buffer-modified-p)))
+	    (beginning-of-line)
+	    (if (bobp) (goto-char (point-max)))
+	    (insert "------ NOTE:\n------\n")
+	    (backward-char 20)
+	    (set-buffer-modified-p bufmod)))
+      ;; (setq Info-window-start (window-start))
+      (setq Info-window-configuration (current-window-configuration))
+      (pop-to-buffer (find-file-noselect (nth arg Info-annotations-path)))
+      (use-local-map Info-annotate-map)
+      (setq major-mode 'Info-annotate-mode)
+      (setq mode-name "Info Annotate")
+      (if which
+	  (if (save-excursion
+		(goto-char (point-min))
+		(re-search-forward which nil t))
+	      (progn
+		(goto-char (match-beginning 0))
+		(forward-line 1)
+		(forward-char where)))
+	(let ((bufmod (buffer-modified-p)))
+	  (goto-char (point-max))
+	  (insert (format "\n------ File: %s  Node: %s  Line: %d\n"
+			  file node line))
+	  (setq pt (point))
+	  (insert "\n------\n"
+		  "\nPress C-c C-c to save and return to Info.\n")
+	  (goto-char pt)
+	  (set-buffer-modified-p bufmod))))))
+
+(defun Info-cease-annotate ()
+  (interactive)
+  (let ((bufmod (buffer-modified-p)))
+    (while (save-excursion
+	     (goto-char (point-min))
+	     (re-search-forward "\n\n?Press .* to save and return to Info.\n"
+				nil t))
+      (delete-region (1+ (match-beginning 0)) (match-end 0)))
+    (while (save-excursion
+	     (goto-char (point-min))
+	     (re-search-forward "\n------ File:.*Node:.*Line:.*\n+------\n"
+				nil t))
+      (delete-region (match-beginning 0) (match-end 0)))
+    (set-buffer-modified-p bufmod))
+  (save-buffer)
+  (fundamental-mode)
+  (bury-buffer)
+  (or (one-window-p) (delete-window))
+  (info)
+  (setq Info-current-annotation-completions nil)
+  (set-window-configuration Info-window-configuration)
+  (Info-reannotate-node))
+
+(defun Info-bookmark (arg tag)
+  (interactive "p\nsBookmark name: ")
+  (Info-annotate arg)
+  (if (or (string-match "^\"\\(.*\\)\"$" tag)
+	  (string-match "^<<\\(.*\\)>>$" tag))
+      (setq tag (substring tag (match-beginning 1) (match-end 1))))
+  (let ((pt (point)))
+    (search-forward "\n------\n")
+    (let ((end (- (point) 8)))
+      (goto-char pt)
+      (if (re-search-forward "<<[^>\n]*>>" nil t)
+	  (delete-region (match-beginning 0) (match-end 0))
+	(goto-char end))
+      (or (equal tag "")
+	  (insert "<<" tag ">>"))))
+  (Info-cease-annotate))
+
+(defun Info-exit ()
+  "Exit Info by selecting some other buffer."
+  (interactive)
+  (if Info-standalone
+      (save-buffers-kill-emacs)
+    (switch-to-buffer (prog1 (other-buffer (current-buffer))
+			(bury-buffer (current-buffer))))))
+
+(defun Info-undefined ()
+  "Make command be undefined in Info."
+  (interactive)
+  (ding))
+
+(defun Info-help ()
+  "Enter the Info tutorial."
+  (interactive)
+  (delete-other-windows)
+  (Info-find-node "info"
+		  (if (< (window-height) 23)
+		      "Help-Small-Screen"
+		    "Help")))
+
+(defun Info-summary ()
+  "Display a brief summary of all Info commands."
+  (interactive)
+  (save-window-excursion
+    (switch-to-buffer "*Help*")
+    (erase-buffer)
+    (insert (documentation 'Info-mode))
+    (goto-char (point-min))
+    (let (flag)
+      (while (progn (setq flag (not (pos-visible-in-window-p (point-max))))
+		    (message (if flag "Type Space to see more"
+			       "Type Space to return to Info"))
+		    (let ((e (next-command-event)))
+		      (if (/= ?\  (event-to-character e))
+			  (progn (setq unread-command-event e) nil)
+			flag)))
+	(scroll-up)))
+    (message "")
+    (bury-buffer "*Help*")))
+
+(defun Info-get-token (pos start all &optional errorstring)
+  "Return the token around POS,
+POS must be somewhere inside the token
+START is a regular expression which will match the
+    beginning of the tokens delimited string
+ALL is a regular expression with a single
+    parenthized subpattern which is the token to be
+    returned. E.g. '{\(.*\)}' would return any string
+    enclosed in braces around POS.
+SIG optional fourth argument, controls action on no match
+    nil: return nil
+    t: beep
+    a string: signal an error, using that string."
+  (save-excursion
+    (goto-char (point-min))
+    (re-search-backward "\\`")  ; Bug fix due to Nicholas J. Foskett.
+    (goto-char pos)
+    (re-search-backward start (max (point-min) (- pos 200)) 'yes)
+    (let (found)
+      (while (and (re-search-forward all (min (point-max) (+ pos 200)) 'yes)
+		  (not (setq found (and (<= (match-beginning 0) pos)
+					(> (match-end 0) pos))))))
+      (if (and found (<= (match-beginning 0) pos)
+	       (> (match-end 0) pos))
+	  (buffer-substring (match-beginning 1) (match-end 1))
+	(cond ((null errorstring)
+	       nil)
+	      ((eq errorstring t)
+	       (beep)
+	       nil)
+	      (t
+	       (error "No %s around position %d" errorstring pos)))))))
+
+(defun Info-follow-clicked-node (event)
+  "Follow a node reference near clicked point.  Like M, F, N, P or U command.
+At end of the node's text, moves to the next node."
+  (interactive "@e")
+  (or (and (event-point event)
+	   (Info-follow-nearest-node
+	    (max (progn
+		   (select-window (event-window event))
+		   (event-point event))
+		 (1+ (point-min)))))
+      (error "click on a cross-reference to follow")))
+
+(defun Info-maybe-follow-clicked-node (event &optional click-count)
+  "Follow a node reference (if any) near clicked point.
+Like M, F, N, P or U command.  At end of the node's text, moves to the
+next node.  No error is given if there is no node to follow."
+  (interactive "@e")
+  (and (event-point event)
+       (Info-follow-nearest-node
+	(max (progn
+	       (select-window (event-window event))
+	       (event-point event))
+	     (1+ (point-min))))))
+
+(defun Info-find-nearest-node (point)
+  (let (node)
+    (cond
+     ((= point (point-min)) nil)   ; don't trigger on accidental RET.
+     ((setq node (Info-get-token point
+				 (format "\\*%s[ \n]" Info-footnote-tag)
+				 (format "\\*%s[ \n]\\([^:]*\\):"
+					 Info-footnote-tag)))
+      (list "Following cross-reference %s..."
+	    (list 'Info-follow-reference node)))
+     ((setq node (Info-get-token point "\\* " "\\* \\([^:]*\\)::"))
+      (list "Selecting menu item %s..."
+	    (list 'Info-goto-node node nil t)))
+     ((setq node (Info-get-token point "\\* " "\\* \\([^:]*\\):"))
+      (list "Selecting menu item %s..."
+	    (list 'Info-menu node)))
+     ((setq node (Info-get-token point "Up: " "Up: \\([^,\n\t]*\\)"))
+      (list "Going up..."
+	    (list 'Info-goto-node node)))
+     ((setq node (Info-get-token point "Next: " "Next: \\([^,\n\t]*\\)"))
+      (list "Next node..."
+	    (list 'Info-goto-node node)))
+     ((setq node (Info-get-token point "File: " "File: \\([^,\n\t]*\\)"))
+      (list "Top node..."
+	    (list 'Info-goto-node "Top")))
+     ((setq node (Info-get-token point "Prev[ious]*: "
+				 "Prev[ious]*: \\([^,\n\t]*\\)"))
+      (list "Previous node..."
+	    (list 'Info-goto-node node)))
+     ((setq node (Info-get-token point "Node: " "Node: \\([^,\n\t]*\\)"))
+      (list "Reselecting %s..."
+	    (list 'Info-goto-node node)))
+     ((save-excursion (goto-char point) (looking-at "[ \n]*\\'"))
+      (if Info-in-cross-reference
+	  (list "Back to last node..."
+		'(Info-last))
+	(list "Next node..."
+	      '(Info-global-next)))))
+    ))
+
+(defun Info-follow-nearest-node (point)
+  "Follow a node reference near point.  Like M, F, N, P or U command.
+At end of the node's text, moves to the next node."
+  (interactive "d")
+  (let ((data (Info-find-nearest-node point)))
+    (if (null data)
+	nil
+      (let ((msg (format (car data) (nth 1 (nth 1 data)))))
+	(message "%s" msg)
+	(eval (nth 1 data))
+	(message "%sdone" msg))
+      t)))
+
+(defun Info-indicated-node (event)
+  (condition-case ()
+      (save-excursion
+	(cond ((eventp event)
+	       (set-buffer (event-buffer event))
+	       (setq event (event-point event))))
+	(let* ((data (Info-find-nearest-node event))
+	       (name (nth 1 (nth 1 data))))
+	  (and name (nth 1 data))))
+    (error nil)))
+
+
+(defvar Info-mode-map nil
+  "Keymap containing Info commands.")
+(if Info-mode-map
+    nil
+  (setq Info-mode-map (make-keymap))
+  (suppress-keymap Info-mode-map)
+  (define-key Info-mode-map "." 'beginning-of-buffer)
+  (define-key Info-mode-map " " 'Info-scroll-next)
+  (define-key Info-mode-map "1" 'Info-nth-menu-item)
+  (define-key Info-mode-map "2" 'Info-nth-menu-item)
+  (define-key Info-mode-map "3" 'Info-nth-menu-item)
+  (define-key Info-mode-map "4" 'Info-nth-menu-item)
+  (define-key Info-mode-map "5" 'Info-nth-menu-item)
+  (define-key Info-mode-map "6" 'Info-nth-menu-item)
+  (define-key Info-mode-map "7" 'Info-nth-menu-item)
+  (define-key Info-mode-map "8" 'Info-nth-menu-item)
+  (define-key Info-mode-map "9" 'Info-nth-menu-item)
+  (define-key Info-mode-map "0" 'Info-last-menu-item)
+  (define-key Info-mode-map "?" 'Info-summary)
+  (define-key Info-mode-map "a" 'Info-annotate)
+  (define-key Info-mode-map "b" 'beginning-of-buffer)
+  (define-key Info-mode-map "d" 'Info-directory)
+  (define-key Info-mode-map "e" 'Info-edit)
+  (define-key Info-mode-map "f" 'Info-follow-reference)
+  (define-key Info-mode-map "g" 'Info-goto-node)
+  (define-key Info-mode-map "h" 'Info-help)
+  (define-key Info-mode-map "i" 'Info-index)
+  (define-key Info-mode-map "j" 'Info-goto-bookmark)
+  (define-key Info-mode-map "k" 'Info-emacs-key)
+  (define-key Info-mode-map "l" 'Info-last)
+  (define-key Info-mode-map "m" 'Info-menu)
+  (define-key Info-mode-map "n" 'Info-next)
+  (define-key Info-mode-map "p" 'Info-prev)
+  (define-key Info-mode-map "q" 'Info-exit)
+  (define-key Info-mode-map "r" 'Info-follow-reference)
+  (define-key Info-mode-map "s" 'Info-search)
+  (define-key Info-mode-map "t" 'Info-top)
+  (define-key Info-mode-map "u" 'Info-up)
+  (define-key Info-mode-map "v" 'Info-visit-file)
+  (define-key Info-mode-map "x" 'Info-bookmark)
+  (define-key Info-mode-map "<" 'Info-top)
+  (define-key Info-mode-map ">" 'Info-end)
+  (define-key Info-mode-map "[" 'Info-global-prev)
+  (define-key Info-mode-map "]" 'Info-global-next)
+  (define-key Info-mode-map "{" 'Info-page-prev)
+  (define-key Info-mode-map "}" 'Info-page-next)
+  (define-key Info-mode-map "=" 'Info-restore-point)
+  (define-key Info-mode-map "!" 'Info-select-node)
+  (define-key Info-mode-map "@" 'Info-follow-nearest-node)
+  (define-key Info-mode-map "," 'Info-index-next)
+  (define-key Info-mode-map "*" 'Info-elisp-ref)
+  (define-key Info-mode-map "\t" 'Info-next-reference)
+  (define-key Info-mode-map "\e\t" 'Info-prev-reference)
+  (define-key Info-mode-map "\r" 'Info-follow-nearest-node)
+  (define-key Info-mode-map "\177" 'Info-scroll-prev)
+  ;; XEmacs addition
+  (define-key Info-mode-map [backspace] 'Info-scroll-prev)
+
+  (define-key Info-mode-map 'button2 'Info-follow-clicked-node)
+  (define-key Info-mode-map 'button3 'Info-select-node-menu))
+
+
+;; Info mode is suitable only for specially formatted data.
+(put 'info-mode 'mode-class 'special)
+
+(defun Info-mode ()
+  "Info mode is for browsing through the Info documentation tree.
+Documentation in Info is divided into \"nodes\", each of which
+discusses one topic and contains references to other nodes
+which discuss related topics.  Info has commands to follow
+the references and show you other nodes.
+
+h	Invoke the Info tutorial.
+q	Quit Info: return to the previously selected file or buffer.
+
+Selecting other nodes:
+n	Move to the \"next\" node of this node.
+p	Move to the \"previous\" node of this node.
+m	Pick menu item specified by name (or abbreviation).
+1-9, 0	Pick first..ninth, last item in node's menu.
+	Menu items select nodes that are \"subsections\" of this node.
+u	Move \"up\" from this node (i.e., from a subsection to a section).
+f or r	Follow a cross reference by name (or abbrev).  Type `l' to get back.
+RET     Follow cross reference or menu item indicated by cursor.
+i	Look up a topic in this file's Index and move to that node.
+,	(comma) Move to the next match from a previous `i' command.
+l	(letter L) Move back to the last node you were in.
+
+Moving within a node:
+Space	Scroll forward a full screen.   DEL       Scroll backward.
+b	Go to beginning of node.        Meta->    Go to end of node.
+TAB	Go to next cross-reference.     Meta-TAB  Go to previous ref.
+
+Mouse commands:
+Left Button	Set point.
+Middle Button	Click on a highlighted node reference to go to it.
+Right Button	Pop up a menu of applicable Info commands.
+
+Advanced commands:
+g	Move to node, file, or annotation tag specified by name.
+	Examples:  `g Rectangles' `g (Emacs)Rectangles' `g Emacs'.
+v	Move to file, with filename completion.
+k	Look up a key sequence in Emacs manual (also C-h C-k at any time).
+*	Look up a function name in Emacs Lisp manual (also C-h C-f).
+d	Go to the main directory of Info files.
+< or t	Go to Top (first) node of this file.
+>	Go to last node in this file.
+\[	Go to previous node, treating file as one linear document.
+\]	Go to next node, treating file as one linear document.
+{	Scroll backward, or go to previous node if at top.
+}	Scroll forward, or go to next node if at bottom.
+=	Restore cursor position from last time in this node.
+a	Add a private note (annotation) to the current node.
+x, j	Add, jump to a bookmark (annotation tag).
+s	Search this Info file for a node containing the specified regexp.
+e	Edit the contents of the current node."
+  (kill-all-local-variables)
+  (setq major-mode 'Info-mode)
+  (setq mode-name "Info")
+  (use-local-map Info-mode-map)
+  (set-syntax-table text-mode-syntax-table)
+  (setq local-abbrev-table text-mode-abbrev-table)
+  (setq case-fold-search t)
+  (setq buffer-read-only t)
+;  (setq buffer-mouse-map Info-mode-mouse-map)
+  (make-local-variable 'Info-current-file)
+  (make-local-variable 'Info-current-subfile)
+  (make-local-variable 'Info-current-node)
+  (make-local-variable 'Info-tag-table-marker)
+  (make-local-variable 'Info-current-file-completions)
+  (make-local-variable 'Info-current-annotation-completions)
+  (make-local-variable 'Info-index-alternatives)
+  (make-local-variable 'Info-history)
+  (if t ;; XEmacs: remove v19 test
+      (progn
+	(or (and (fboundp 'find-face) (find-face 'info-node))
+	    (make-face 'info-node "used for node links in info"))
+	(or (and (fboundp 'find-face) (find-face 'info-xref))
+	    (make-face 'info-xref "used for cross-references in info"))
+	(or (face-differs-from-default-p 'info-node)
+	    (if (face-differs-from-default-p 'bold-italic)
+		(copy-face 'bold-italic 'info-node)
+	      (copy-face 'bold 'info-node)))
+	(or (face-differs-from-default-p 'info-xref)
+	    (copy-face 'bold 'info-xref))))
+  (make-local-variable 'mouse-track-click-hook)
+  (add-hook 'mouse-track-click-hook 'Info-maybe-follow-clicked-node)
+  ;; #### The console-on-window-system-p check is to allow this to
+  ;; work on tty's.  The real problem here is that featurep really
+  ;; needs to have some device/console domain knowledge added to it.
+  (if (and (featurep 'toolbar)
+	   (console-on-window-system-p)
+	   (not Info-inhibit-toolbar))
+      (set-specifier default-toolbar (cons (current-buffer) info::toolbar)))
+  (if (featurep 'menubar)
+      (progn
+	;; make a local copy of the menubar, so our modes don't
+	;; change the global menubar
+	(set-buffer-menubar current-menubar)
+	(add-submenu nil '("Info"
+			   :filter Info-menu-filter))))
+  (run-hooks 'Info-mode-hook)
+  (Info-set-mode-line))
+
+(defvar Info-edit-map nil
+  "Local keymap used within `e' command of Info.")
+(if Info-edit-map
+    nil
+  ;; XEmcas: remove FSF stuff
+  (setq Info-edit-map (make-sparse-keymap))
+  (set-keymap-name Info-edit-map 'Info-edit-map)
+  (set-keymap-parents Info-edit-map (list text-mode-map))
+  (define-key Info-edit-map "\C-c\C-c" 'Info-cease-edit))
+
+;; Info-edit mode is suitable only for specially formatted data.
+(put 'info-edit-mode 'mode-class 'special)
+
+(defun Info-edit-mode ()
+  "Major mode for editing the contents of an Info node.
+Like text mode with the addition of `Info-cease-edit'
+which returns to Info mode for browsing.
+\\{Info-edit-map}"
+  )
+
+(defun Info-edit ()
+  "Edit the contents of this Info node.
+Allowed only if variable `Info-enable-edit' is non-nil."
+  (interactive)
+  (or Info-enable-edit
+      (error "Editing info nodes is not enabled"))
+  (use-local-map Info-edit-map)
+  (setq major-mode 'Info-edit-mode)
+  (setq mode-name "Info Edit")
+  (kill-local-variable 'modeline-buffer-identification)
+  (setq buffer-read-only nil)
+  ;; Make mode line update.
+  (set-buffer-modified-p (buffer-modified-p))
+  (message (substitute-command-keys
+	     "Editing: Type \\[Info-cease-edit] to return to info")))
+
+(defun Info-cease-edit ()
+  "Finish editing Info node; switch back to Info proper."
+  (interactive)
+  ;; Do this first, so nothing has changed if user C-g's at query.
+  (and (buffer-modified-p)
+       (y-or-n-p "Save the file? ")
+       (save-buffer))
+  (use-local-map Info-mode-map)
+  (setq major-mode 'Info-mode)
+  (setq mode-name "Info")
+  (Info-set-mode-line)
+  (setq buffer-read-only t)
+  ;; Make mode line update.
+  (set-buffer-modified-p (buffer-modified-p))
+  (and (marker-position Info-tag-table-marker)
+       (buffer-modified-p)
+       (message "Tags may have changed.  Use Info-tagify if necessary")))
+
+(defun Info-find-emacs-command-nodes (command)
+  "Return a list of locations documenting COMMAND in the XEmacs Info manual.
+The locations are of the format used in Info-history, i.e.
+\(FILENAME NODENAME BUFFERPOS\)."
+  (let ((where '())
+	(cmd-desc (concat "^\\* " (regexp-quote (symbol-name command))
+			  ":\\s *\\(.*\\)\\.$")))
+    (save-excursion
+      (Info-find-node "XEmacs" "Command Index")
+      ;; Take the index node off the Info history.
+      (setq Info-history (cdr Info-history))
+      (goto-char (point-max))
+      (while (re-search-backward cmd-desc nil t)
+	  (setq where (cons (list Info-current-file
+				  (buffer-substring
+				   (match-beginning 1)
+				   (match-end 1))
+				  0)
+			    where)))
+      where)))
+
+
+;;; fontification and mousability for info
+
+(defun Info-highlight-region (start end face)
+  (let ((extent (make-extent start end)))
+    (set-extent-face extent face)
+    (set-extent-property extent 'info t)
+    (set-extent-property extent 'highlight t)))
+
+(defun Info-fontify-node ()
+  (save-excursion
+    (let (;(lucid (string-match "Lucid" emacs-version))
+	  (case-fold-search t)
+	  (xref-regexp (concat "\\*" 
+			       (regexp-quote Info-footnote-tag)
+			       "[ \n\t]*\\([^:]*\\):")))
+;      (if lucid
+	  (map-extents (function (lambda (x y) (delete-extent x)))
+		       (current-buffer) (point-min) (point-max) nil)
+;	)
+      (goto-char (point-min))
+      (if (looking-at "^File: [^,: \t]+,?[ \t]+")
+	  (progn
+	    (goto-char (match-end 0))
+	    (while
+		(looking-at "[ \t]*[^:, \t\n]+:[ \t]+\\([^:,\t\n]+\\),?")
+	      (goto-char (match-end 0))
+	      (Info-highlight-region (match-beginning 1) (match-end 1)
+				     'info-xref ;lucid
+				     ))))
+      (goto-char (point-min))
+      (while (re-search-forward xref-regexp nil t)
+	(if (= (char-after (1- (match-beginning 0))) ?\") ; hack
+	    nil
+	  (Info-highlight-region (match-beginning 1) (match-end 1)
+				 'info-xref ;lucid
+				 )))
+      (goto-char (point-min))
+      (if (and (search-forward "\n* menu:" nil t)
+;; principle of least astonishment, dude...
+;; (Also, in xemacs this is fast even on indexes, and without it, nodes don't
+;; highlight when you move over them.)
+;;	       (not (string-match "\\<Index\\>" Info-current-node))
+;;	       (< (- (point-max) (point)) 10000)
+	       )
+	  (while (re-search-forward "^\\* \\([^:\t\n]*\\):" nil t)
+	    (Info-highlight-region (match-beginning 1) (match-end 1)
+				   'info-node ;lucid
+				   )))
+      (set-buffer-modified-p nil))))
+
+(defun Info-construct-menu (&optional event)
+  "Construct a menu of Info commands.
+Adds an entry for the node at EVENT, or under point if EVENT is omitted.
+Used to construct the menubar submenu and popup menu."
+  (or event (setq event (point)))
+  (let ((case-fold-search t)
+	(xref-regexp (concat "\\*" 
+			     (regexp-quote Info-footnote-tag)
+			     "[ \n\t]*\\([^:]*\\):"))
+	up-p prev-p next-p menu
+	i text xrefs subnodes in)
+    (save-excursion
+      (goto-char (point-min))
+      (if (looking-at ".*\\bNext:") (setq next-p t))
+      (if (looking-at ".*\\bPrev:") (setq prev-p t))
+      (if (looking-at ".*Up:") (setq up-p t))
+      (setq menu (nconc 
+			(if (setq in (Info-indicated-node event))
+			    (list (vector (car (cdr in)) in t)))
+			(list
+			 ["Goto Info Top-level" Info-directory t]
+			 (vector "Next Node" 'Info-next next-p)
+			 (vector "Previous Node" 'Info-prev prev-p)
+			 (vector "Parent Node (Up)" 'Info-up up-p)
+			 ["Goto Node..." Info-goto-node t]
+			 ["Goto Last Visited Node" Info-last t])))
+      (while (re-search-forward xref-regexp nil t)
+	(setq text (buffer-substring (match-beginning 1) (match-end 1)))
+	(while (setq i (string-match "[ \n\t]+" text i))
+	  (setq text (concat (substring text 0 i) " "
+			     (substring text (match-end 0))))
+	  (setq i (1+ i)))
+	(setq xrefs (cons text xrefs)))
+      (setq xrefs (nreverse xrefs))
+      (if (> (length xrefs) 21) (setcdr (nthcdr 20 xrefs) '(more)))
+      (goto-char (point-min))
+      (if (search-forward "\n* menu:" nil t)
+	  (while (re-search-forward "^\\* \\([^:\t\n]*\\):" nil t)
+	    (setq text (buffer-substring (match-beginning 1) (match-end 1)))
+	    (setq subnodes (cons text subnodes))))
+      (setq subnodes (nreverse subnodes))
+      (if (> (length subnodes) 21) (setcdr (nthcdr 20 subnodes) '(more)))
+      )
+    (if xrefs
+	(nconc menu (list "----" "Cross-References:" "----")
+	       (mapcar (function (lambda (xref)
+				   (if (eq xref 'more)
+				       "...more..."
+				     (vector xref
+					     (list 'Info-follow-reference xref)
+					     t))))
+		       xrefs)))
+    (if subnodes
+	(nconc menu (list "----" "Sub-Nodes:" "----")
+	       (mapcar (function (lambda (node)
+				   (if (eq node 'more)
+				       "...more..."
+				     (vector node (list 'Info-menu node)
+					     t))))
+		       subnodes)))
+    menu))
+
+(defun Info-menu-filter (menu)
+  "This is the menu filter for the \"Info\" submenu."
+  (Info-construct-menu))
+
+(defun Info-select-node-menu (event)
+  "Pops up a menu of applicable Info commands."
+  (interactive "e")
+  (select-window (event-window event))
+  (let ((menu (Info-construct-menu event)))
+    (setq menu (nconc (list "Info" ; title: not shown
+			    "Info Commands:" "----")
+		      menu))
+    (let ((popup-menu-titles nil))
+      (popup-menu menu))))
+
+;;; Info toolbar support
+
+;; exit icon taken from GNUS
+(defvar info::toolbar-exit-icon
+  (if (featurep 'toolbar)
+      (toolbar-make-button-list
+       (expand-file-name (if (featurep 'xpm) "info-exit.xpm" "info-exit.xbm")
+			 toolbar-icon-directory)))
+  "Exit Info icon")
+
+(defvar info::toolbar-up-icon
+  (if (featurep 'toolbar)
+      (toolbar-make-button-list
+       (expand-file-name (if (featurep 'xpm) "info-up.xpm" "info-up.xbm")
+			 toolbar-icon-directory)))
+  "Up icon")
+
+(defvar info::toolbar-next-icon
+  (if (featurep 'toolbar)
+      (toolbar-make-button-list
+       (expand-file-name (if (featurep 'xpm) "info-next.xpm" "info-next.xbm")
+			 toolbar-icon-directory)))
+  "Next icon")
+
+(defvar info::toolbar-prev-icon
+  (if (featurep 'toolbar)
+      (toolbar-make-button-list
+       (expand-file-name (if (featurep 'xpm) "info-prev.xpm" "info-prev.xbm")
+			 toolbar-icon-directory)))
+  "Prev icon")
+
+(defvar info::toolbar
+  (if (featurep 'toolbar)
+; disabled until we get the next/prev-win icons working again.
+;      (cons (first initial-toolbar-spec)
+;       (cons (second initial-toolbar-spec)
+	     '([info::toolbar-exit-icon
+		 Info-exit
+		 t
+		 "Exit info"]
+		[info::toolbar-prev-icon
+		 Info-prev
+		 t
+		 "Prev entry in same section"]
+		[info::toolbar-next-icon
+		 Info-next
+		 t
+		 "Next entry in same section"]
+		[info::toolbar-up-icon
+		 Info-up
+		 t
+		 "Up entry to enclosing section"]
+		)))
+;))
+
+
+(provide 'info)
+
+(run-hooks 'Info-load-hook)
+
+;;; info.el ends here