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+;;; mcs-xmu.el --- Functions to unify ISO646 characters for XEmacs-mule
+
+;; Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
+
+;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Keywords: emulation, compatibility, Mule
+
+;; This file is part of APEL (A Portable Emacs Library).
+
+;; This program 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.
+
+;; This program 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 module will be loaded from mcs-xm automatically.
+;;    There is no guarantee that it will work alone.
+
+;;; Code:
+
+(defcustom mime-iso646-character-unification-alist
+  (eval-when-compile
+    (let (dest
+         (i 33))
+      (while (< i 92)
+       (setq dest
+             (cons (cons (char-to-string (make-char 'latin-jisx0201 i))
+                         (format "%c" i))
+                   dest))
+       (setq i (1+ i)))
+      (setq i 93)
+      (while (< i 126)
+       (setq dest
+             (cons (cons (char-to-string (make-char 'latin-jisx0201 i))
+                         (format "%c" i))
+                   dest))
+       (setq i (1+ i)))
+      (nreverse dest)))
+  "Alist unified string vs. canonical string."
+  :group 'i18n
+  :type '(repeat (cons string string)))
+
+(defcustom mime-unified-character-face nil
+  "Face of unified character."
+  :group 'i18n
+  :type 'face)
+
+(defcustom mime-character-unification-limit-size 2048
+  "Limit size to unify characters.  It is referred by the function
+`decode-mime-charset-region-with-iso646-unification'.  If the length of
+the specified region (start end) is larger than its value, the function
+works for only decoding MIME-CHARSET.  If it is nil, size is unlimited."
+  :group 'i18n
+  :type '(radio (integer :tag "Max size")
+               (const :tag "Unlimited" nil)))
+
+(defun decode-mime-charset-region-with-iso646-unification (start end charset
+                                                                lbt)
+  (save-excursion
+    (save-restriction
+      (narrow-to-region start end)
+      (if (prog1
+             (or (null mime-character-unification-limit-size)
+                 (<= (- end start) mime-character-unification-limit-size))
+           (decode-mime-charset-region-default start end charset lbt))
+         (let ((rest mime-iso646-character-unification-alist))
+           (while rest
+             (let ((pair (car rest))
+                   case-fold-search)
+               (goto-char (point-min))
+               (while (search-forward (car pair) nil t)
+                 (let ((str (cdr pair)))
+                   (if mime-unified-character-face
+                       (put-text-property
+                        0 (length str)
+                        'face mime-unified-character-face str))
+                   (replace-match str 'fixed-case 'literal)
+                   )
+                 ))
+             (setq rest (cdr rest)))))
+      )))
+
+
+;;; @ end
+;;;
+
+(provide 'mcs-xmu)
+
+;;; mcs-xmu.el ends here