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[Emacs-diffs] Changes to uudecode.el
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From: |
Glenn Morris |
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Subject: |
[Emacs-diffs] Changes to uudecode.el |
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Date: |
Sun, 02 Dec 2007 18:49:22 +0000 |
CVSROOT: /sources/emacs
Module name: emacs
Changes by: Glenn Morris <gm> 07/12/02 18:49:22
Index: uudecode.el
===================================================================
RCS file: uudecode.el
diff -N uudecode.el
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ uudecode.el 2 Dec 2007 18:49:22 -0000 1.1
@@ -0,0 +1,237 @@
+;;; uudecode.el -- elisp native uudecode
+
+;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+;; 2005, 2006, 2007 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 3, 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., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;;; Code:
+
+(eval-when-compile (require 'cl))
+
+(eval-and-compile
+ (defalias 'uudecode-char-int
+ (if (fboundp 'char-int)
+ '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))
+
+(defcustom uudecode-use-external
+ (executable-find uudecode-decoder-program)
+ "*Use external uudecode program."
+ :version "22.1"
+ :group 'gnus-extract
+ :type 'boolean)
+
+(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
+ (if (featurep 'xemacs)
+ ;; In XEmacs, `nil' is not a valid coding system.
+ '(binary . binary)
+ nil)))
+ (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))))))
+
+(eval-and-compile
+ (defalias 'uudecode-string-to-multibyte
+ (cond
+ ((featurep 'xemacs)
+ 'identity)
+ ((fboundp 'string-to-multibyte)
+ 'string-to-multibyte)
+ (t
+ (lambda (string)
+ "Return a multibyte string with the same individual chars as string."
+ (mapconcat
+ (lambda (ch) (string-as-multibyte (char-to-string ch)))
+ string ""))))))
+
+;;;###autoload
+(defun uudecode-decode-region-internal (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 ((done nil)
+ (counter 0)
+ (remain 0)
+ (bits 0)
+ (lim 0) inputpos result
+ (non-data-chars (concat "^" uudecode-alphabet)))
+ (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)
+ (if enable-multibyte-characters
+ (mapc #'(lambda (x) (insert (uudecode-string-to-multibyte x)))
+ (nreverse result))
+ (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
+ (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