Import Gnus subtree

[packages] / xemacs-packages / gnus / lisp / rfc2045.el

diff --git a/xemacs-packages/gnus/lisp/rfc2045.el b/xemacs-packages/gnus/lisp/rfc2045.el
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+;;; rfc2045.el --- Functions for decoding rfc2045 headers
+
+;; Copyright (C) 1998-2016 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; 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 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
+;; 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.  If not, see <http://www.gnu.org/licenses/>.
+
+;; RFC 2045 is: "Multipurpose Internet Mail Extensions (MIME) Part
+;; One:  Format of Internet Message Bodies".
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ietf-drums)
+
+(defun rfc2045-encode-string (param value)
+  "Return and PARAM=VALUE string encoded according to RFC2045."
+  (if (or (string-match (concat "[" ietf-drums-no-ws-ctl-token "]") value)
+         (string-match (concat "[" ietf-drums-tspecials "]") value)
+         (string-match "[ \n\t]" value)
+         (not (string-match (concat "[" ietf-drums-text-token "]") value)))
+      (concat param "=" (format "%S" value))
+    (concat param "=" value)))
+
+(provide 'rfc2045)
+
+;;; rfc2045.el ends here