+++ /dev/null
-;;; 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
-
-;; This looks as though it could be made rather more efficient for
-;; internal working. Encoding could use a lookup table and decoding
-;; should presumably use a vector or list buffer for partial results
-;; rather than with-current-buffer. -- fx
-
-;; Only `uudecode-decode-region' should be advertised, and whether or
-;; not that uses a program should be customizable, but I guess it's
-;; too late now. -- fx
-
-;;; Code:
-
-(eval-when-compile (require 'cl))
-
-(eval-and-compile
- (defalias 'uudecode-char-int
- (if (fboundp 'char-int)
- 'char-int
- 'identity))
-
- (if (featurep 'xemacs)
- (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))))))
-
-(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 using external program.
-If FILE-NAME is non-nil, save the result to FILE-NAME. The program
-used is specified by `uudecode-decoder-program'."
- (interactive "r\nP")
- (let ((cbuf (current-buffer)) tempfile firstline 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)
- (if (fboundp 'make-temp-file)
- (let ((temporary-file-directory
- uudecode-temporary-file-directory))
- (make-temp-file "uu"))
- (expand-file-name
- (make-temp-name "uu")
- uudecode-temporary-file-directory))))
- (let ((cdir default-directory)
- default-process-coding-system)
- (unwind-protect
- (with-temp-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")))
- (ignore-errors (or file-name (delete-file tempfile))))))
-
-;;;###autoload
-(defun uudecode-decode-region (start end &optional file-name)
- "Uudecode region between START and END without using an external program.
-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*"))
- (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 (- (uudecode-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
- (-
- (uudecode-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
projects / elisp / gnus.git- / blobdiff