;;; uudecode.el -- elisp native uudecode
-;; Copyright (c) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (c) 1998, 1999, 2000, 2001, 2003, 2004
+;; Free Software Foundation, Inc.
;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
;; Keywords: uudecode news
-;; This file is a part of GNU Emacs.
+;; 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
;;; Commentary:
-;; 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
-
;;; Code:
-(autoload 'executable-find "executable")
-
(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))))))
+ 'identity)))
(defcustom uudecode-decoder-program "uudecode"
"*Non-nil value should be a string that names a uu decoder.
:group 'gnus-extract
:type '(repeat string))
-(defcustom uudecode-use-external
+(defcustom uudecode-use-external
(executable-find uudecode-decoder-program)
"*Use external uudecode program."
:group 'gnus-extract
"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)
+ (let ((done nil)
(counter 0)
(remain 0)
(bits 0)
- (lim 0) inputpos
+ (lim 0) inputpos result
(non-data-chars (concat "^" uudecode-alphabet)))
- (unwind-protect
- (save-excursion
+ (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))))))
+ (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)
+ (setq result (cons
+ (concat
+ (char-to-string (lsh bits -16))
+ (char-to-string (logand (lsh bits -8) 255))
+ (char-to-string (logand bits 255)))
+ result))
+ (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)
+ (setq result (cons
+ (concat
+ (char-to-string (logand (lsh bits -16) 255))
+ (char-to-string (logand (lsh bits -8) 255)))
+ result)))
+ ((= counter 2)
+ (setq result (cons
+ (char-to-string (logand (lsh bits -10) 255))
+ result))))
+ (skip-chars-forward non-data-chars end))
+ (if file-name
+ (let (default-enable-multibyte-characters)
+ (with-temp-file file-name
+ (insert (apply 'concat (nreverse result)))))
+ (or (markerp end) (setq end (set-marker (make-marker) end)))
(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)))))
+ (insert (apply 'concat (nreverse result)))
+ (delete-region (point) end))))))
;;;###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."
- (if uudecode-use-external
+ (if uudecode-use-external
(uudecode-decode-region-external start end file-name)
(uudecode-decode-region-internal start end file-name)))
(provide 'uudecode)
+;;; arch-tag: e1f09ed5-62b4-4677-9f13-4e81c4fe8ce3
;;; uudecode.el ends here
projects / gnus / blobdiff