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diff --git a/lisp/cvs-status.el b/lisp/cvs-status.el
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+;;; cvs-status.el --- Major mode for browsing `cvs status' output
+
+;; Copyright (C) 1999-2000  Free Software Foundation, Inc.
+
+;; Author: Stefan Monnier <monnier@cs.yale.edu>
+;; Keywords: pcl-cvs cvs status tree
+;; Version: $Name:  $
+;; Revision: $Id: cvs-status.el,v 1.14 2000/03/05 21:32:21 monnier Exp $
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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.
+
+;; GNU Emacs 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 GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; Todo:
+
+;; - Rename to cvs-status-mode.el
+;; - Somehow allow cvs-status-tree to work on-the-fly
+
+;;; Code:
+
+(eval-when-compile (require 'cl))
+(require 'pcvs-util)
+
+;;;
+
+(defgroup cvs-status nil
+  "Major mode for browsing `cvs status' output."
+  :group 'pcl-cvs
+  :prefix "cvs-status-")
+
+(easy-mmode-defmap cvs-status-mode-map
+  '(("n"	. next-line)
+    ("N"	. cvs-status-next-entry)
+    ("\M-n"	. cvs-status-next-entry)
+    ("p"	. previous-line)
+    ("P"	. cvs-status-prev-entry)
+    ("\M-p"	. cvs-status-prev-entry)
+    ("t"	. cvs-status-cvstrees)
+    ("T"	. cvs-status-trees))
+  "CVS-Status' keymap."
+  :group 'cvs-status
+  :inherit 'cvs-mode-map)
+
+;;(easy-menu-define cvs-status-menu cvs-status-mode-map
+;;  "Menu for `cvs-status-mode'."
+;;  '("CVS-Status"
+;;    ["Show Tag Trees"	cvs-status-tree	t]
+;;    ))
+
+(defvar cvs-status-mode-hook nil
+  "Hook run at the end of `cvs-status-mode'.")
+
+(defconst cvs-status-tags-leader-re "^   Existing Tags:$")
+(defconst cvs-status-entry-leader-re "^File: \\(\\S-+\\)\\s-+Status: \\(.+\\)$")
+(defconst cvs-status-dir-re "^cvs[.ex]* [a-z]+: Examining \\(.+\\)$")
+(defconst cvs-status-rev-re "[0-9][.0-9]*\\.[.0-9]*[0-9]")
+(defconst cvs-status-tag-re "[ \t]\\([a-zA-Z][^ \t\n.]*\\)")
+
+(defconst cvs-status-font-lock-keywords
+  `((,cvs-status-entry-leader-re
+     (1 'cvs-filename-face)
+     (2 'cvs-need-action-face))
+    (,cvs-status-tags-leader-re
+     (,cvs-status-rev-re
+      (save-excursion (re-search-forward "^\n" nil 'move) (point))
+      (progn (re-search-backward cvs-status-tags-leader-re nil t)
+	     (forward-line 1))
+      (0 font-lock-comment-face))
+     (,cvs-status-tag-re
+      (save-excursion (re-search-forward "^\n" nil 'move) (point))
+      (progn (re-search-backward cvs-status-tags-leader-re nil t)
+	     (forward-line 1))
+      (1 font-lock-function-name-face)))))
+(defconst cvs-status-font-lock-defaults
+  '(cvs-status-font-lock-keywords t nil nil nil))
+  
+
+(put 'cvs-status-mode 'mode-class 'special)
+;;;###autoload
+(autoload 'cvs-status-mode "cvs-status" "Mode used for cvs status output." t)
+(eval-when-compile (autoload 'easy-mmode-define-derived-mode "easy-mmode"))
+(easy-mmode-define-derived-mode cvs-status-mode fundamental-mode "CVS-Status"
+  "Mode used for cvs status output."
+  (set (make-local-variable 'font-lock-defaults) cvs-status-font-lock-defaults)
+  (set (make-local-variable 'cvs-minor-wrap-function) 'cvs-status-minor-wrap))
+
+
+(defun cvs-status-next-entry (n)
+  "Go to the N'th next cvs status entry."
+  (interactive "p")
+  (if (< n 0) (cvs-status-prev-entry (- n))
+    (forward-line 1)
+    (re-search-forward cvs-status-entry-leader-re nil t n)
+    (beginning-of-line)))
+
+(defun cvs-status-prev-entry (n)
+  "Go to the N'th previous cvs status entry."
+  (interactive "p")
+  (if (< n 0) (cvs-status-next-entry (- n))
+    (forward-line -1)
+    (re-search-backward cvs-status-entry-leader-re nil t n)
+    (beginning-of-line)))
+
+(defun cvs-status-current-file ()
+  (save-excursion
+    (forward-line 1)
+    (or (re-search-backward cvs-status-entry-leader-re nil t)
+	(re-search-forward cvs-status-entry-leader-re))
+    (let* ((file (match-string 1))
+	   (cvsdir (and (re-search-backward cvs-status-dir-re nil t)
+			(match-string 1)))
+	   (pcldir (and (re-search-backward cvs-pcl-cvs-dirchange-re nil t)
+			(match-string 1)))
+	   (dir ""))
+      (let ((default-directory ""))
+	(when pcldir (setq dir (expand-file-name pcldir dir)))
+	(when cvsdir (setq dir (expand-file-name cvsdir dir)))
+	(expand-file-name file dir)))))
+
+(defun cvs-status-current-tag ()
+  (save-excursion
+    (let ((pt (point))
+	  (col (current-column))
+	  (start (progn (re-search-backward cvs-status-tags-leader-re nil t) (point)))
+	  (end (progn (re-search-forward "^$" nil t) (point))))
+      (when (and (< start pt) (> end pt))
+	(goto-char pt)
+	(end-of-line)
+	(let ((tag nil) (dist pt) (end (point)))
+	  (beginning-of-line)
+	  (while (re-search-forward cvs-status-tag-re end t)
+	    (let* ((cole (current-column))
+		   (colb (save-excursion
+			   (goto-char (match-beginning 1)) (current-column)))
+		   (ndist (min (abs (- cole col)) (abs (- colb col)))))
+	      (when (< ndist dist)
+		(setq dist ndist)
+		(setq tag (match-string 1)))))
+	  tag)))))
+
+(defun cvs-status-minor-wrap (buf f)
+  (let ((data (with-current-buffer buf
+		(cons
+		 (cons (cvs-status-current-file)
+		       (cvs-status-current-tag))
+		 (when (ignore-errors (mark))
+		   ;; `mark-active' is not provided by XEmacs :-(
+		   (save-excursion
+		     (goto-char (mark))
+		     (cons (cvs-status-current-file)
+			   (cvs-status-current-tag))))))))
+    (let ((cvs-branch-prefix (cdar data))
+	  (cvs-secondary-branch-prefix (and (cdar data) (cddr data)))
+	  (cvs-minor-current-files
+	   (cons (caar data)
+		 (when (and (cadr data) (not (equal (caar data) (cadr data))))
+		   (list (cadr data)))))
+	  ;; FIXME:  I need to force because the fileinfos are UNKNOWN
+	  (cvs-force-command "/F"))
+      (funcall f))))
+
+;;
+;; Tagelt, tag element
+;;
+
+(defstruct (cvs-tag
+	    (:constructor nil)
+	    (:constructor cvs-tag-make
+			  (vlist &optional name type))
+	    (:conc-name cvs-tag->))
+  vlist
+  name
+  type)
+
+(defsubst cvs-status-vl-to-str (vl) (mapconcat 'number-to-string vl "."))
+
+(defun cvs-tag->string (tag)
+  (if (stringp tag) tag
+    (let ((name (cvs-tag->name tag))
+	   (vl (cvs-tag->vlist tag)))
+      (if (null name) (cvs-status-vl-to-str vl)
+	(let ((rev (if vl (concat " (" (cvs-status-vl-to-str vl) ")") "")))
+	  (if (consp name) (mapcar (lambda (name) (concat name rev)) name)
+	    (concat name rev)))))))
+
+(defun cvs-tag-compare-1 (vl1 vl2)
+  (cond
+   ((and (null vl1) (null vl2)) 'equal)
+   ((null vl1) 'more2)
+   ((null vl2) 'more1)
+   (t (let ((v1 (car vl1))
+	    (v2 (car vl2)))
+	(cond
+	 ((> v1 v2) 'more1)
+	 ((< v1 v2) 'more2)
+	 (t (cvs-tag-compare-1 (cdr vl1) (cdr vl2))))))))
+
+(defsubst cvs-tag-compare (tag1 tag2)
+  (cvs-tag-compare-1 (cvs-tag->vlist tag1) (cvs-tag->vlist tag2)))
+
+(defun cvs-tag-merge (tag1 tag2)
+  "Merge TAG1 and TAG2 into one."
+  (let ((type1 (cvs-tag->type tag1))
+	(type2 (cvs-tag->type tag2))
+	(name1 (cvs-tag->name tag1))
+	(name2 (cvs-tag->name tag2)))
+    (unless (equal (cvs-tag->vlist tag1) (cvs-tag->vlist tag2))
+      (setf (cvs-tag->vlist tag1) nil))
+    (if type1
+	(unless (or (not type2) (equal type1 type2))
+	  (setf (cvs-tag->type tag1) nil))
+      (setf (cvs-tag->type tag1) type2))
+    (if name1
+	(setf (cvs-tag->name tag1) (cvs-append name1 name2))
+      (setf (cvs-tag->name tag1) name2))
+    tag1))
+
+(defun cvs-tree-print (tags printer column)
+  "Print the tree of TAGS where each tag's string is given by PRINTER.
+PRINTER should accept both a tag (in which case it should return a string)
+or a string (in which case it should simply return its argument).
+A tag cannot be a CONS.  The return value can also be a list of strings,
+if several nodes where merged into one.
+The tree will be printed no closer than column COLUMN."
+  
+  (let* ((eol (save-excursion (end-of-line) (current-column)))
+	 (column (max (+ eol 2) column)))
+    (if (null tags) column
+      ;;(move-to-column-force column)
+      (let* ((rev (cvs-car tags))
+	     (name (funcall printer (cvs-car rev)))
+	     (rest (append (cvs-cdr name) (cvs-cdr tags)))
+	     (prefix
+	      (save-excursion
+		(or (= (forward-line 1) 0) (insert "\n"))
+		(cvs-tree-print rest printer column))))
+	(assert (>= prefix column))
+	(move-to-column prefix t)
+	(assert (eolp))
+	(insert (cvs-car name))
+	(dolist (br (cvs-cdr rev))
+	  (let* ((column (current-column))
+		 (brrev (funcall printer (cvs-car br)))
+		 (brlength (length (cvs-car brrev)))
+		 (brfill (concat (make-string (/ brlength 2) ? ) "|"))
+		 (prefix
+		  (save-excursion
+		    (insert " -- ")
+		    (cvs-tree-print (cvs-append brrev brfill (cvs-cdr br))
+				    printer (current-column)))))
+	    (delete-region (save-excursion (move-to-column prefix) (point))
+			   (point))
+	    (insert " " (make-string (- prefix column 2) ?-) " ")
+	    (end-of-line)))
+	prefix))))
+
+(defun cvs-tree-merge (tree1 tree2)
+  "Merge tags trees TREE1 and TREE2 into one.
+BEWARE:  because of stability issues, this is not a symetric operation."
+  (assert (and (listp tree1) (listp tree2)))
+  (cond
+   ((null tree1) tree2)
+   ((null tree2) tree1)
+   (t
+    (let* ((rev1 (car tree1))
+	   (tag1 (cvs-car rev1))
+	   (vl1 (cvs-tag->vlist tag1))
+	   (l1 (length vl1))
+	   (rev2 (car tree2))
+	   (tag2 (cvs-car rev2))
+	   (vl2 (cvs-tag->vlist tag2))
+	   (l2 (length vl2)))
+    (cond
+     ((= l1 l2)
+      (case (cvs-tag-compare tag1 tag2)
+	(more1 (list* rev2 (cvs-tree-merge tree1 (cdr tree2))))
+	(more2 (list* rev1 (cvs-tree-merge (cdr tree1) tree2)))
+	(equal
+	 (cons (cons (cvs-tag-merge tag1 tag2)
+		     (cvs-tree-merge (cvs-cdr rev1) (cvs-cdr rev2)))
+	       (cvs-tree-merge (cdr tree1) (cdr tree2))))))
+     ((> l1 l2)
+      (cvs-tree-merge (list (cons (cvs-tag-make (butlast vl1)) tree1)) tree2))
+     ((< l1 l2)
+      (cvs-tree-merge tree1 (list (cons (cvs-tag-make (butlast vl2)) tree2)))))))))
+
+(defun cvs-tag-make-tag (tag)
+  (let ((vl (mapcar 'string-to-number (split-string (third tag) "\\."))))
+    (cvs-tag-make vl (first tag) (intern (second tag)))))
+
+(defun cvs-tags->tree (tags)
+  "Make a tree out of a list of TAGS."
+  (let ((tags
+	 (mapcar (lambda (tag)
+		   (let ((tag (cvs-tag-make-tag tag)))
+		     (list (if (not (eq (cvs-tag->type tag) 'branch)) tag
+			     (list (cvs-tag-make (butlast (cvs-tag->vlist tag)))
+				   tag)))))
+		 tags)))
+    (while (cdr tags)
+      (let (tl)
+	(while tags
+	  (push (cvs-tree-merge (pop tags) (pop tags)) tl))
+	(setq tags (nreverse tl))))
+    (car tags)))
+
+(defun cvs-status-get-tags ()
+  "Look for a list of tags, read them in and delete them.
+Returns NIL if there was an empty list of tags and T if there wasn't
+even a list.  Else, return the list of tags where each element of
+the list is a three-string list TAG, KIND, REV."
+  (let ((tags nil))
+    (if (not (re-search-forward cvs-status-tags-leader-re nil t)) t
+      (forward-char 1)
+      (let ((pt (point))
+	    (lastrev nil)
+	    (case-fold-search t))
+	(or
+	 (looking-at "\\s-+no\\s-+tags")
+
+	 (progn				; normal listing
+	   (while (looking-at "^[ \t]+\\([^ \t\n]+\\)[ \t]+(\\([a-z]+\\): \\(.+\\))$")
+	     (push (list (match-string 1) (match-string 2) (match-string 3)) tags)
+	     (forward-line 1))
+	   (unless (looking-at "^$") (setq tags nil) (goto-char pt))
+	   tags)
+
+	 (progn				; cvstree-style listing
+	   (while (or (looking-at "^   .+\\(.\\)  \\([0-9.]+\\): \\([^\n\t .0-9][^\n\t ]*\\)?$")
+		      (and lastrev
+			   (looking-at "^   .+\\(\\)  \\(8\\)?  \\([^\n\t .0-9][^\n\t ]*\\)$")))
+	     (setq lastrev (or (match-string 2) lastrev))
+	     (push (list (match-string 3)
+			 (if (equal (match-string 1) " ") "branch" "revision")
+			 lastrev) tags)
+	     (forward-line 1))
+	   (unless (looking-at "^$") (setq tags nil) (goto-char pt))
+	   (setq tags (nreverse tags)))
+
+	 (progn				; new tree style listing
+	   (let* ((re-lead "[ \t]*\\(-+\\)?\\(|\n?[ \t]+\\)?")
+		  (re3 (concat re-lead "\\(\\.\\)?\\(" cvs-status-rev-re "\\)"))
+		  (re2 (concat re-lead cvs-status-tag-re "\\(\\)"))
+		  (re1 (concat re-lead cvs-status-tag-re
+			       " (\\(" cvs-status-rev-re "\\))")))
+	     (while (or (looking-at re1) (looking-at re2) (looking-at re3))
+	       (push (list (match-string 3)
+			   (if (match-string 1) "branch" "revision")
+			   (match-string 4)) tags)
+	       (goto-char (match-end 0))
+	       (when (eolp) (forward-char 1))))
+	   (unless (looking-at "^$") (setq tags nil) (goto-char pt))
+	   (setq tags (nreverse tags))))
+
+	(delete-region pt (point)))
+      tags)))
+
+(defvar font-lock-mode)
+(defun cvs-refontify (beg end)
+  (when (and (boundp 'font-lock-mode)
+	     font-lock-mode
+	     (fboundp 'font-lock-fontify-region))
+    (font-lock-fontify-region (1- beg) (1+ end))))
+
+(defun cvs-status-trees ()
+  "Look for a lists of tags, and replace them with trees."
+  (interactive)
+  (save-excursion
+    (goto-char (point-min))
+    (let ((inhibit-read-only t)
+	  (tags nil))
+      (while (listp (setq tags (cvs-status-get-tags)))
+	;;(let ((pt (save-excursion (forward-line -1) (point))))
+	  (save-restriction
+	    (narrow-to-region (point) (point))
+	    ;;(newline)
+	    (cvs-tree-print (cvs-tags->tree tags) 'cvs-tag->string 3))
+	  ;;(cvs-refontify pt (point))
+	  (sit-for 0)
+	  ;;)
+	  ))))
+
+;;;; 
+;;;; CVSTree-style trees
+;;;; 
+
+;; chars sets.  Ripped from cvstree
+(defvar cvstree-dstr-2byte-ready
+  (when (featurep 'mule)
+      (if (boundp 'current-language-environment)
+	  (string= current-language-environment "Japanese")
+	t))				; mule/emacs-19
+  "*Variable that specifies characters set used in cvstree tree graph.
+If non-nil, 2byte (Japanese?) characters set is used.
+If nil, 1byte characters set is used.
+2byte characters might be available with Mule or Emacs with Mule extension.")
+
+(defconst cvstree-dstr-char-space
+  (if cvstree-dstr-2byte-ready "　" " "))
+(defconst cvstree-dstr-char-hbar
+  (if cvstree-dstr-2byte-ready "━" "-"))
+(defconst cvstree-dstr-char-vbar
+  (if cvstree-dstr-2byte-ready "┃" "|"))
+(defconst cvstree-dstr-char-branch
+  (if cvstree-dstr-2byte-ready "┣" "+"))
+(defconst cvstree-dstr-char-eob		;end of branch
+  (if cvstree-dstr-2byte-ready "┗" "`"))
+(defconst cvstree-dstr-char-bob		;beginning of branch
+  (if cvstree-dstr-2byte-ready "┳" "+"))
+
+(defun cvs-tag-lessp (tag1 tag2)
+  (eq (cvs-tag-compare tag1 tag2) 'more2))
+
+(defvar cvs-tree-nomerge t)
+
+(defun cvs-status-cvstrees (&optional arg)
+  "Look for a list of tags, and replace it with a tree.
+Optional prefix ARG chooses between two representations."
+  (interactive "P")
+  (save-excursion
+    (goto-char (point-min))
+    (let ((inhibit-read-only t)
+	  (tags nil)
+	  (cvs-tree-nomerge (if arg (not cvs-tree-nomerge) cvs-tree-nomerge)))
+      (while (listp (setq tags (cvs-status-get-tags)))
+	(let ((tags (mapcar 'cvs-tag-make-tag tags))
+	      ;;(pt (save-excursion (forward-line -1) (point)))
+	      )
+	  (setq tags (sort tags 'cvs-tag-lessp))
+	  (let* ((first (first tags))
+		 (prev (if (cvs-tag-p first)
+			   (list (first (cvs-tag->vlist first))) nil)))
+	    (cvs-tree-tags-insert tags prev)
+	    ;;(cvs-refontify pt (point))
+	    (sit-for 0)))))))
+
+(defun cvs-tree-tags-insert (tags prev)
+  (when tags
+    (let* ((tag (car tags))
+	   (vlist (cvs-tag->vlist tag))
+	   (nprev ;"next prev"
+	    (let* ((next (cvs-car (cadr tags)))
+		   (nprev (if (and cvs-tree-nomerge next
+				   (equal vlist (cvs-tag->vlist next)))
+			      prev vlist)))
+	      (cvs-map (lambda (v p) v) nprev prev)))
+	   (after (save-excursion
+		   (newline)
+		   (cvs-tree-tags-insert (cdr tags) nprev)))
+	   (pe t)			;"prev equal"
+	   (nas nil))			;"next afters" to be returned
+      (insert "   ")
+      (do* ((vs vlist (cdr vs))
+	    (ps prev (cdr ps))
+	    (as after (cdr as)))
+	  ((and (null as) (null vs) (null ps))
+	   (let ((revname (cvs-status-vl-to-str vlist)))
+	     (if (cvs-every 'identity (cvs-map 'equal prev vlist))
+		 (insert (make-string (+ 4 (length revname)) ? )
+			 (or (cvs-tag->name tag) ""))
+	       (insert "  " revname ": " (or (cvs-tag->name tag) "")))))
+	(let* ((eq (and pe (equal (car ps) (car vs))))
+	       (next-eq (equal (cadr ps) (cadr vs))))
+	  (let* ((na+char
+		  (if (car as)
+		      (if eq
+			  (if next-eq (cons t cvstree-dstr-char-vbar)
+			    (cons t cvstree-dstr-char-branch))
+			(cons nil cvstree-dstr-char-bob))
+		    (if eq
+			(if next-eq (cons nil cvstree-dstr-char-space)
+			  (cons t cvstree-dstr-char-eob))
+		      (cons nil (if (and (eq (cvs-tag->type tag) 'branch)
+					 (cvs-every 'null as))
+				    cvstree-dstr-char-space
+				  cvstree-dstr-char-hbar))))))
+	    (insert (cdr na+char))
+	    (push (car na+char) nas))
+	  (setq pe eq)))
+      (nreverse nas))))
+
+;;;; 
+;;;; Merged trees from different files
+;;;; 
+
+(defun cvs-tree-fuzzy-merge-1 (trees tree prev)
+  )
+
+(defun cvs-tree-fuzzy-merge (trees tree)
+  "Do the impossible:  merge TREE into TREES."
+  ())
+
+(defun cvs-tree ()
+  "Get tags from the status output and merge tham all into a big tree."
+  (save-excursion
+    (goto-char (point-min))
+    (let ((inhibit-read-only t)
+	  (trees (make-vector 31 0)) tree)
+      (while (listp (setq tree (cvs-tags->tree (cvs-status-get-tags))))
+	(cvs-tree-fuzzy-merge trees tree))
+      (erase-buffer)
+      (let ((cvs-tag-print-rev nil))
+	(cvs-tree-print tree 'cvs-tag->string 3)))))
+      
+
+(provide 'cvs-status)
+
+;;; cvs-status.el ends here