X-Git-Url: http://cgit.sxemacs.org/?a=blobdiff_plain;f=lisp%2Futf7.el;h=ebf01d17b9c1a61e4a2ef8a23c90bcdd85cfa224;hb=9a8731d6dea8021a10dec1b42f382609336a9aa9;hp=5207e96aeaef5b6a4e6dc82329d84e48edf0bc1a;hpb=20bc985a3232ebba106d335afcfd6b596bb8efba;p=gnus

diff --git a/lisp/utf7.el b/lisp/utf7.el
index 5207e96ae..ebf01d17b 100644
--- a/lisp/utf7.el
+++ b/lisp/utf7.el
@@ -1,5 +1,7 @@
 ;;; utf7.el --- UTF-7 encoding/decoding for Emacs   -*-coding: iso-8859-1;-*-
-;; Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc.
+
+;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+;;   2008, 2009, 2010  Free Software Foundation, Inc.
 
 ;; Author: Jon K Hellan <hellan@acm.org>
 ;; Maintainer: bugs@gnus.org
@@ -7,10 +9,10 @@
 
 ;; This file is part of GNU Emacs.
 
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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.
+;; the Free Software Foundation, either version 3 of the License, 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
@@ -18,9 +20,7 @@
 ;; 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.
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
 
 ;;; Commentary:
 
@@ -78,7 +78,7 @@
 (defconst utf7-utf-16-coding-system
   (cond ((mm-coding-system-p 'utf-16-be-no-signature) ; Mule-UCS
 	 'utf-16-be-no-signature)
-	((and (mm-coding-system-p 'utf-16-be) ; Emacs 22.1
+	((and (mm-coding-system-p 'utf-16-be) ; Emacs 21.3, Emacs 22
 	      ;; Avoid versions with BOM.
 	      (= 2 (length (encode-coding-string "a" 'utf-16-be))))
 	 'utf-16-be)
@@ -207,22 +207,26 @@ Characters are in raw byte pairs in narrowed buffer."
 
 (defun utf7-encode (string &optional for-imap)
   "Encode UTF-7 STRING.  Use IMAP modification if FOR-IMAP is non-nil."
-  (let ((default-enable-multibyte-characters t))
-    (with-temp-buffer
-      (insert string)
-      (utf7-encode-internal for-imap)
-      (buffer-string))))
+  (if (and (coding-system-p 'utf-7) (coding-system-p 'utf-7-imap))
+      ;; Emacs 23 with proper support for IMAP
+      (encode-coding-string string (if for-imap 'utf-7-imap 'utf-7))
+    (mm-with-multibyte-buffer
+     (insert string)
+     (utf7-encode-internal for-imap)
+     (buffer-string))))
 
 (defun utf7-decode (string &optional for-imap)
   "Decode UTF-7 STRING.  Use IMAP modification if FOR-IMAP is non-nil."
-  (let ((default-enable-multibyte-characters nil))
-    (with-temp-buffer
-      (insert string)
-      (utf7-decode-internal for-imap)
-      (mm-enable-multibyte)
-      (buffer-string))))
+  (if (and (coding-system-p 'utf-7) (coding-system-p 'utf-7-imap))
+      ;; Emacs 23 with proper support for IMAP
+      (decode-coding-string string (if for-imap 'utf-7-imap 'utf-7))
+    (mm-with-unibyte-buffer
+     (insert string)
+     (utf7-decode-internal for-imap)
+     (mm-enable-multibyte)
+     (buffer-string))))
 
 (provide 'utf7)
 
-;;; arch-tag: 96078b55-85c7-4161-aed2-932c24b282c7
+;; arch-tag: 96078b55-85c7-4161-aed2-932c24b282c7
 ;;; utf7.el ends here