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[Emacs-diffs] Changes to emacs/lisp/gnus/uudecode.el [lexbind]
From: |
Miles Bader |
Subject: |
[Emacs-diffs] Changes to emacs/lisp/gnus/uudecode.el [lexbind] |
Date: |
Tue, 14 Oct 2003 19:35:01 -0400 |
Index: emacs/lisp/gnus/uudecode.el
diff -c /dev/null emacs/lisp/gnus/uudecode.el:1.7.8.1
*** /dev/null Tue Oct 14 19:35:01 2003
--- emacs/lisp/gnus/uudecode.el Tue Oct 14 19:34:51 2003
***************
*** 0 ****
--- 1,218 ----
+ ;;; uudecode.el --- elisp native uudecode
+
+ ;; Copyright (c) 1998, 1999, 2000 Free Software Foundation, Inc.
+
+ ;; Author: Shenghuo Zhu <address@hidden>
+ ;; Keywords: uudecode news
+
+ ;; 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
+
+ ;; 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)
+ (let ((temporary-file-directory
+ uudecode-temporary-file-directory))
+ (make-temp-file "uu"))))
+ (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)
+
+ ;;; arch-tag: e1f09ed5-62b4-4677-9f13-4e81c4fe8ce3
+ ;;; uudecode.el ends here
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