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diff --git a/lisp/gnus/uudecode.el b/lisp/gnus/uudecode.el
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+;;; uudecode.el -- elisp native uudecode
+
+;; Copyright (c) 1998, 1999, 2000 Free Software Foundation, Inc.
+
+;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
+;; Keywords: uudecode news
+
+;; This file is a 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:
+
+;;     Lots of codes are stolen from mm-decode.el, gnus-uu.el and
+;;     base64.el
+
+;;; Code:
+
+(if (not (fboundp 'char-int))
+    (defalias 'char-int 'identity))
+
+(defcustom uudecode-decoder-program "uudecode"
+  "*Non-nil value should be a string that names a uu decoder.
+The program should expect to read uu data on its standard
+input and write the converted data to its standard output."
+  :type 'string
+  :group 'gnus-extract)
+
+(defcustom uudecode-decoder-switches nil
+  "*List of command line flags passed to `uudecode-decoder-program'."
+  :group 'gnus-extract
+  :type '(repeat string))
+
+(defconst uudecode-alphabet "\040-\140")
+
+(defconst uudecode-begin-line "^begin[ \t]+[0-7][0-7][0-7][ \t]+\\(.*\\)$")
+(defconst uudecode-end-line "^end[ \t]*$")
+
+(defconst uudecode-body-line
+  (let ((i 61) (str "^M"))
+    (while (> (setq i (1- i)) 0)
+      (setq str (concat str "[^a-z]")))
+    (concat str ".?$")))
+
+(defvar uudecode-temporary-file-directory
+  (cond ((fboundp 'temp-directory) (temp-directory))
+	((boundp 'temporary-file-directory) temporary-file-directory)
+	("/tmp")))
+
+;;;###autoload
+(defun uudecode-decode-region-external (start end &optional file-name)
+  "Uudecode region between START and END with external decoder.
+
+If FILE-NAME is non-nil, save the result to FILE-NAME."
+  (interactive "r\nP")
+  (let ((cbuf (current-buffer)) tempfile firstline work-buffer status)
+    (save-excursion
+      (goto-char start)
+      (when (re-search-forward uudecode-begin-line nil t)
+	(forward-line 1)
+	(setq firstline (point))
+	(cond ((null file-name))
+	      ((stringp file-name))
+	      (t
+	       (setq file-name (read-file-name "File to Name:"
+					       nil nil nil
+					       (match-string 1)))))
+	(setq tempfile (if file-name
+			   (expand-file-name file-name)
+			 (make-temp-name
+			  ;; /tmp/uu...
+			  (expand-file-name
+			   "uu" uudecode-temporary-file-directory))))
+	(let ((cdir default-directory) default-process-coding-system)
+	  (unwind-protect
+	      (progn
+		(set-buffer (setq work-buffer
+				  (generate-new-buffer " *uudecode-work*")))
+		(buffer-disable-undo work-buffer)
+		(insert "begin 600 " (file-name-nondirectory tempfile) "\n")
+		(insert-buffer-substring cbuf firstline end)
+		(cd (file-name-directory tempfile))
+		(apply 'call-process-region
+		       (point-min)
+		       (point-max)
+		       uudecode-decoder-program
+		       nil
+		       nil
+		       nil
+		       uudecode-decoder-switches))
+	    (cd cdir) (set-buffer cbuf)))
+	(if (file-exists-p tempfile)
+	    (unless file-name
+	      (goto-char start)
+	      (delete-region start end)
+	      (let (format-alist)
+		(insert-file-contents-literally tempfile)))
+	  (message "Can not uudecode")))
+      (and work-buffer (kill-buffer work-buffer))
+      (ignore-errors (or file-name (delete-file tempfile))))))
+
+(if (string-match "XEmacs" emacs-version)
+    (defalias 'uudecode-insert-char 'insert-char)
+  (defun uudecode-insert-char (char &optional count ignored buffer)
+    (if (or (null buffer) (eq buffer (current-buffer)))
+	(insert-char char count)
+      (with-current-buffer buffer
+	(insert-char char count)))))
+
+;;;###autoload
+
+(defun uudecode-decode-region (start end &optional file-name)
+  "Uudecode region between START and END.
+If FILE-NAME is non-nil, save the result to FILE-NAME."
+  (interactive "r\nP")
+  (let ((work-buffer nil)
+	(done nil)
+	(counter 0)
+	(remain 0)
+	(bits 0)
+	(lim 0) inputpos
+	(non-data-chars (concat "^" uudecode-alphabet)))
+    (unwind-protect
+	(save-excursion
+	  (goto-char start)
+	  (when (re-search-forward uudecode-begin-line nil t)
+	    (cond ((null file-name))
+		  ((stringp file-name))
+		  (t
+		   (setq file-name (expand-file-name
+				    (read-file-name "File to Name:"
+						    nil nil nil
+						    (match-string 1))))))
+	    (setq work-buffer (generate-new-buffer " *uudecode-work*"))
+	    (buffer-disable-undo work-buffer)
+	    (forward-line 1)
+	    (skip-chars-forward non-data-chars end)
+	    (while (not done)
+	      (setq inputpos (point))
+	      (setq remain 0 bits 0 counter 0)
+	      (cond
+	       ((> (skip-chars-forward uudecode-alphabet end) 0)
+		(setq lim (point))
+		(setq remain
+		      (logand (- (char-int (char-after inputpos)) 32) 63))
+		(setq inputpos (1+ inputpos))
+		(if (= remain 0) (setq done t))
+		(while (and (< inputpos lim) (> remain 0))
+		  (setq bits (+ bits
+				(logand
+				 (-
+				  (char-int (char-after inputpos)) 32) 63)))
+		  (if (/= counter 0) (setq remain (1- remain)))
+		  (setq counter (1+ counter)
+			inputpos (1+ inputpos))
+		  (cond ((= counter 4)
+			 (uudecode-insert-char
+			  (lsh bits -16) 1 nil work-buffer)
+			 (uudecode-insert-char
+			  (logand (lsh bits -8) 255) 1 nil work-buffer)
+			 (uudecode-insert-char (logand bits 255) 1 nil
+					       work-buffer)
+			 (setq bits 0 counter 0))
+			(t (setq bits (lsh bits 6)))))))
+	      (cond
+	       (done)
+	       ((> 0 remain)
+		(error "uucode line ends unexpectly")
+		(setq done t))
+	       ((and (= (point) end) (not done))
+		;;(error "uucode ends unexpectly")
+		(setq done t))
+	       ((= counter 3)
+		(uudecode-insert-char (logand (lsh bits -16) 255) 1 nil
+				      work-buffer)
+		(uudecode-insert-char (logand (lsh bits -8) 255) 1 nil
+				      work-buffer))
+	       ((= counter 2)
+		(uudecode-insert-char (logand (lsh bits -10) 255) 1 nil
+				      work-buffer)))
+	      (skip-chars-forward non-data-chars end))
+	    (if file-name
+		(save-excursion
+		  (set-buffer work-buffer)
+		  (write-file file-name))
+	      (or (markerp end) (setq end (set-marker (make-marker) end)))
+	      (goto-char start)
+	      (insert-buffer-substring work-buffer)
+	      (delete-region (point) end))))
+      (and work-buffer (kill-buffer work-buffer)))))
+
+(provide 'uudecode)
+
+;;; uudecode.el ends here