--- /dev/null
+;;; uudecode.el -- elisp native uudecode
+;; Copyright (c) 1998 by Shenghuo Zhu <zsh@cs.rochester.edu>
+
+;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
+;; $Revision: 1.1 $
+;; Keywords: uudecode
+
+;; 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:
+;; Lots of codes are stolen from mm-decode.el, gnus-uu.el and
+;; base64.el
+
+;;; Code:
+
+(if (not (fboundp 'char-int))
+ (fset 'char-int 'identity))
+
+(defvar uu-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.")
+
+(defvar uu-decoder-switches nil
+ "*List of command line flags passed to the command named by uu-decoder-program.")
+
+(defvar uu-alphabet "\040-\140")
+
+(defvar uu-begin-string "^begin[ \t]+[0-7][0-7][0-7][ \t]+\\(.*\\)$")
+(defvar uu-end-string "^end[ \t]*$")
+
+(defvar uu-body-line
+ (let ((i 61) (str "^M"))
+ (while (> (setq i (1- i)) 0)
+ (setq str (concat str "[^a-z]")))
+ (concat str ".?$")))
+
+(defvar uu-temporary-file-directory "/tmp/")
+
+(defun uu-decode-region-external (start end &optional file-name)
+ "Decode uuencoded files using an external program."
+ (interactive "r\nP")
+ (let ((cbuf (current-buffer)) tempfile firstline work-buffer status)
+ (save-excursion
+ (goto-char start)
+ (when (re-search-forward uu-begin-string 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 (expand-file-name
+ (or file-name (concat uu-temporary-file-directory
+ (make-temp-name "uu")))))
+ (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)
+ uu-decoder-program
+ nil
+ nil
+ nil
+ uu-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))
+ (condition-case ()
+ (or file-name (delete-file tempfile))
+ (error)))))
+
+(defun uu-insert-char (char &optional count ignored buffer)
+ (condition-case nil
+ (progn
+ (insert-char char count ignored buffer)
+ (fset 'uu-insert-char 'insert-char))
+ (wrong-number-of-arguments
+ (fset 'uu-insert-char 'uu-xemacs-insert-char)
+ (uu-insert-char char count ignored buffer))))
+
+(defun uu-xemacs-insert-char (char &optional count ignored buffer)
+ (if (or (null buffer) (eq buffer (current-buffer)))
+ (insert-char char count)
+ (save-excursion
+ (set-buffer buffer)
+ (insert-char char count))))
+
+(defun uu-decode-region (start end &optional file-name)
+ (interactive "r\nP")
+ (let ((work-buffer nil)
+ (done nil)
+ (counter 0)
+ (remain 0)
+ (bits 0)
+ (lim 0) inputpos
+ (non-data-chars (concat "^" uu-alphabet)))
+ (unwind-protect
+ (save-excursion
+ (goto-char start)
+ (when (re-search-forward uu-begin-string 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 uu-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)
+ (uu-insert-char (lsh bits -16) 1 nil work-buffer)
+ (uu-insert-char (logand (lsh bits -8) 255) 1 nil
+ work-buffer)
+ (uu-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)
+ (uu-insert-char (logand (lsh bits -16) 255) 1 nil
+ work-buffer)
+ (uu-insert-char (logand (lsh bits -8) 255) 1 nil
+ work-buffer))
+ ((= counter 2)
+ (uu-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
projects / elisp / gnus.git- / blobdiff