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;;; gnus-mule.el --- provide backward compatibility function to GNUS
;; Copyright (C) 1995, 1997, 2002 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 compatibility 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)
;;; arch-tag: 525e6b69-85de-4dfc-9dbb-764c795d63af
;;; gnus-mule.el ends here
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