1 ;;; mcs-e20.el --- MIME charset implementation for Emacs 20.1 and 20.2
3 ;; Copyright (C) 1996,1997,1998 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Keywords: emulation, compatibility, Mule
8 ;; This file is part of APEL (A Portable Emacs Library).
10 ;; This program is free software; you can redistribute it and/or
11 ;; modify it under the terms of the GNU General Public License as
12 ;; published by the Free Software Foundation; either version 2, or (at
13 ;; your option) any later version.
15 ;; This program is distributed in the hope that it will be useful, but
16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ;; General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
27 ;; This module requires Emacs 20.1 and 20.2.
31 (eval-when-compile (require 'static))
33 (defsubst encode-mime-charset-region (start end charset &optional lbt)
34 "Encode the text between START and END as MIME CHARSET."
36 (if (and enable-multibyte-characters
37 (setq cs (mime-charset-to-coding-system charset lbt)))
38 (encode-coding-region start end cs)
41 (defsubst decode-mime-charset-region (start end charset &optional lbt)
42 "Decode the text between START and END as MIME CHARSET."
44 (if (and enable-multibyte-characters
45 (setq cs (mime-charset-to-coding-system charset lbt)))
46 (decode-coding-region start end cs)
50 (defsubst encode-mime-charset-string (string charset &optional lbt)
51 "Encode the STRING as MIME CHARSET."
53 (if (and enable-multibyte-characters
54 (setq cs (mime-charset-to-coding-system charset lbt)))
55 (encode-coding-string string cs)
58 (defsubst decode-mime-charset-string (string charset &optional lbt)
59 "Decode the STRING as MIME CHARSET."
61 (if (and enable-multibyte-characters
62 (setq cs (mime-charset-to-coding-system charset lbt)))
63 (decode-coding-string string cs)
67 (defvar charsets-mime-charset-alist
68 '(((ascii) . us-ascii)
69 ((ascii latin-iso8859-1) . iso-8859-1)
70 ((ascii latin-iso8859-2) . iso-8859-2)
71 ((ascii latin-iso8859-3) . iso-8859-3)
72 ((ascii latin-iso8859-4) . iso-8859-4)
73 ;;; ((ascii cyrillic-iso8859-5) . iso-8859-5)
74 ((ascii cyrillic-iso8859-5) . koi8-r)
75 ((ascii arabic-iso8859-6) . iso-8859-6)
76 ((ascii greek-iso8859-7) . iso-8859-7)
77 ((ascii hebrew-iso8859-8) . iso-8859-8)
78 ((ascii latin-iso8859-9) . iso-8859-9)
79 ((ascii latin-jisx0201
80 japanese-jisx0208-1978 japanese-jisx0208) . iso-2022-jp)
81 ((ascii latin-jisx0201
82 katakana-jisx0201 japanese-jisx0208) . shift_jis)
83 ((ascii korean-ksc5601) . euc-kr)
84 ((ascii chinese-gb2312) . gb2312)
85 ((ascii chinese-big5-1 chinese-big5-2) . big5)
86 ((ascii thai-tis620 composition) . tis-620)
87 ((ascii latin-iso8859-1 greek-iso8859-7
88 latin-jisx0201 japanese-jisx0208-1978
89 chinese-gb2312 japanese-jisx0208
90 korean-ksc5601 japanese-jisx0212) . iso-2022-jp-2)
91 ; ((ascii latin-iso8859-1 greek-iso8859-7
92 ; latin-jisx0201 japanese-jisx0208-1978
93 ; chinese-gb2312 japanese-jisx0208
94 ; korean-ksc5601 japanese-jisx0212
95 ; chinese-cns11643-1 chinese-cns11643-2) . iso-2022-int-1)
96 ; ((ascii latin-iso8859-1 latin-iso8859-2
97 ; cyrillic-iso8859-5 greek-iso8859-7
98 ; latin-jisx0201 japanese-jisx0208-1978
99 ; chinese-gb2312 japanese-jisx0208
100 ; korean-ksc5601 japanese-jisx0212
101 ; chinese-cns11643-1 chinese-cns11643-2
102 ; chinese-cns11643-3 chinese-cns11643-4
103 ; chinese-cns11643-5 chinese-cns11643-6
104 ; chinese-cns11643-7) . iso-2022-int-1)
107 (defun-maybe coding-system-get (coding-system prop)
108 "Extract a value from CODING-SYSTEM's property list for property PROP."
109 (plist-get (coding-system-plist coding-system) prop)
112 (defun coding-system-to-mime-charset (coding-system)
113 "Convert CODING-SYSTEM to a MIME-charset.
114 Return nil if corresponding MIME-charset is not found."
115 (or (car (rassq coding-system mime-charset-coding-system-alist))
116 (coding-system-get coding-system 'mime-charset)
119 (defun-maybe-cond mime-charset-list ()
120 "Return a list of all existing MIME-charset."
121 ((boundp 'coding-system-list)
122 (let ((dest (mapcar (function car) mime-charset-coding-system-alist))
123 (rest coding-system-list)
127 (unless (rassq cs mime-charset-coding-system-alist)
128 (if (setq cs (coding-system-get cs 'mime-charset))
129 (or (rassq cs mime-charset-coding-system-alist)
131 (setq dest (cons cs dest))
133 (setq rest (cdr rest)))
136 (let ((dest (mapcar (function car) mime-charset-coding-system-alist))
137 (rest (coding-system-list))
141 (unless (rassq cs mime-charset-coding-system-alist)
142 (when (setq cs (or (coding-system-get cs 'mime-charset)
145 (coding-system-get cs 'coding-spec)
147 (string-match "(MIME:[ \t]*\\([^,)]+\\)" cs)
148 (match-string 1 cs))))
149 (setq cs (intern (downcase cs)))
150 (or (rassq cs mime-charset-coding-system-alist)
152 (setq dest (cons cs dest))
154 (setq rest (cdr rest)))
158 (static-when (string= (decode-coding-string "\e.A\eN!" 'ctext) "\eN!")
161 "ISO 2022 based generic encoding for decoding unknown messages."
162 '((ascii t) (latin-iso8859-1 t) t t
163 shoft ascii-eol ascii-cntl seven locking-shift single-shift nil nil nil
165 '((safe-charsets . t))))
175 ;;; mcs-e20.el ends here