;;; gnus-mule.el --- provide backward compatibility function to GNUS ;; Copyright (C) 1995,1997 Free Software Foundation, Inc. ;; Copyright (C) 1995, 2000 Electrotechnical Laboratory, JAPAN. ;; Maintainer: FSF ;; Keywords: news, i18n ;; 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: ;; This file provides the function `gnus-mule-add-group' for backward ;; compatibility with old version of Gnus included in Emacs 20. ;;; Code: (require 'gnus-sum) ;;;###autoload (defun gnus-mule-add-group (name coding-system) "Specify that articles of news group NAME are encoded in CODING-SYSTEM. All news groups deeper than NAME are also the target. If CODING-SYSTEM is a cons, the car part is used and the cdr part is ignored. This function exists for backward comaptibility with Emacs 20. It is recommended to customize the variable `gnus-group-charset-alist' rather than using this function." (if (consp coding-system) ;; Ignore the cdr part because now Gnus can't use different ;; coding systems for encoding and decoding. (setq coding-system (car coding-system))) (let ((tail gnus-group-charset-alist) (prev nil) (pattern (concat "^" (regexp-quote name)))) ;; Check entries of `gnus-group-charset-alist' if they match NAME. (while (not (string-match (car (car tail)) name)) (setq prev tail tail (cdr tail))) (if tail ;; A matching entry was found. (if (string= pattern (car (car tail))) ;; We can modify this entry. (setcar (cdr (car tail)) coding-system) ;; We must add a new entry before this. (if prev (setcdr prev (cons (list pattern coding-system) (cdr prev))) (setq gnus-group-charset-alist (cons (list pattern coding-system) gnus-group-charset-alist)))) ;; We must prepend a new entry. (setq gnus-group-charset-alist (cons (list pattern coding-system) gnus-group-charset-alist))))) (provide 'gnus-mule) ;;; gnus-mule.el ends here