forked from wanderlust/apel
-
Notifications
You must be signed in to change notification settings - Fork 0
/
mcs-e20.el
200 lines (174 loc) · 6.91 KB
/
mcs-e20.el
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
;;; mcs-e20.el --- MIME charset implementation for Emacs 20.1 and 20.2
;; Copyright (C) 1996,1997,1998,1999,2000 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <[email protected]>
;; 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; This module requires Emacs 20.1 and 20.2.
;;; Code:
(require 'pces)
(eval-when-compile (require 'static))
(defsubst encode-mime-charset-region (start end charset &optional lbt)
"Encode the text between START and END as MIME CHARSET."
(let (cs)
(if (and enable-multibyte-characters
(setq cs (mime-charset-to-coding-system charset lbt)))
(encode-coding-region start end cs)
)))
(defsubst decode-mime-charset-region (start end charset &optional lbt)
"Decode the text between START and END as MIME CHARSET."
(let (cs)
(if (and enable-multibyte-characters
(setq cs (mime-charset-to-coding-system charset lbt)))
(decode-coding-region start end cs)
)))
(defsubst encode-mime-charset-string (string charset &optional lbt)
"Encode the STRING as MIME CHARSET."
(let (cs)
(if (and enable-multibyte-characters
(setq cs (mime-charset-to-coding-system charset lbt)))
(encode-coding-string string cs)
string)))
(defsubst decode-mime-charset-string (string charset &optional lbt)
"Decode the STRING as MIME CHARSET."
(let (cs)
(if (and enable-multibyte-characters
(setq cs (mime-charset-to-coding-system charset lbt)))
(decode-coding-string string cs)
string)))
(defvar charsets-mime-charset-alist
(delq
nil
`(((ascii) . us-ascii)
((ascii latin-iso8859-1) . iso-8859-1)
((ascii latin-iso8859-2) . iso-8859-2)
((ascii latin-iso8859-3) . iso-8859-3)
((ascii latin-iso8859-4) . iso-8859-4)
,(if (find-coding-system 'iso-8859-15)
'((ascii latin-iso8859-15) . iso-8859-15))
;;((ascii cyrillic-iso8859-5) . iso-8859-5)
((ascii cyrillic-iso8859-5) . koi8-r)
((ascii arabic-iso8859-6) . iso-8859-6)
((ascii greek-iso8859-7) . iso-8859-7)
((ascii hebrew-iso8859-8) . iso-8859-8)
((ascii latin-iso8859-9) . iso-8859-9)
,(if (find-coding-system 'iso-8859-14)
'((ascii latin-iso8859-14) . iso-8859-14))
((ascii latin-jisx0201
japanese-jisx0208-1978 japanese-jisx0208) . iso-2022-jp)
((ascii latin-jisx0201
katakana-jisx0201 japanese-jisx0208) . shift_jis)
((ascii korean-ksc5601) . euc-kr)
((ascii chinese-gb2312) . gb2312)
((ascii chinese-big5-1 chinese-big5-2) . big5)
,(static-cond
((null (string< mule-version "6.0"))
'((ascii thai-tis620) . tis-620))
(t
'((ascii thai-tis620 composition) . tis-620)))
;; ((ascii latin-iso8859-1 greek-iso8859-7
;; latin-jisx0201 japanese-jisx0208-1978
;; chinese-gb2312 japanese-jisx0208
;; korean-ksc5601 japanese-jisx0212) . iso-2022-jp-2)
;;((ascii latin-iso8859-1 greek-iso8859-7
;; latin-jisx0201 japanese-jisx0208-1978
;; chinese-gb2312 japanese-jisx0208
;; korean-ksc5601 japanese-jisx0212
;; chinese-cns11643-1 chinese-cns11643-2) . iso-2022-int-1)
;;((ascii latin-iso8859-1 latin-iso8859-2
;; cyrillic-iso8859-5 greek-iso8859-7
;; latin-jisx0201 japanese-jisx0208-1978
;; chinese-gb2312 japanese-jisx0208
;; korean-ksc5601 japanese-jisx0212
;; chinese-cns11643-1 chinese-cns11643-2
;; chinese-cns11643-3 chinese-cns11643-4
;; chinese-cns11643-5 chinese-cns11643-6
;; chinese-cns11643-7) . iso-2022-int-1)
)))
(defun-maybe coding-system-get (coding-system prop)
"Extract a value from CODING-SYSTEM's property list for property PROP."
(plist-get (coding-system-plist coding-system) prop)
)
(defvar coding-system-to-mime-charset-exclude-regexp
"^unknown$\\|^x-")
(defun coding-system-to-mime-charset (coding-system)
"Convert CODING-SYSTEM to a MIME-charset.
Return nil if corresponding MIME-charset is not found."
(or (coding-system-get coding-system 'mime-charset)
(let ((coding (coding-system-base coding-system))
(alist mime-charset-coding-system-alist)
result)
(while alist
(if (eq (coding-system-base (cdar alist)) coding)
(setq result (caar alist)
alist nil)
(setq alist (cdr alist))))
(unless (and coding-system-to-mime-charset-exclude-regexp
(string-match coding-system-to-mime-charset-exclude-regexp
(symbol-name result)))
result))))
(defun-maybe-cond mime-charset-list ()
"Return a list of all existing MIME-charset."
((boundp 'coding-system-list)
(let ((dest (mapcar (function car) mime-charset-coding-system-alist))
(rest coding-system-list)
cs)
(while rest
(setq cs (car rest))
(when (and (setq cs (coding-system-get cs 'mime-charset))
(null (memq cs dest)))
(setq dest (cons cs dest)))
(setq rest (cdr rest)))
dest))
(t
(let ((dest (mapcar (function car) mime-charset-coding-system-alist))
(rest (coding-system-list))
cs)
(while rest
(setq cs (car rest))
(unless (rassq cs mime-charset-coding-system-alist)
(when (setq cs (or (coding-system-get cs 'mime-charset)
(and
(setq cs (aref
(coding-system-get cs 'coding-spec)
2))
(string-match "(MIME:[ \t]*\\([^,)]+\\)" cs)
(match-string 1 cs))))
(setq cs (intern (downcase cs)))
(unless (memq cs dest)
(setq dest (cons cs dest))
)))
(setq rest (cdr rest)))
dest)
))
(static-when (and (string= (decode-coding-string "\e.A\eN!" 'ctext) "\eN!")
(or (not (find-coding-system 'x-ctext))
(coding-system-get 'x-ctext 'apel)))
(unless (find-coding-system 'x-ctext)
(make-coding-system
'x-ctext 2 ?x
"Compound text based generic encoding for decoding unknown messages."
'((ascii t) (latin-iso8859-1 t) t t
nil ascii-eol ascii-cntl nil locking-shift single-shift nil nil nil
init-bol nil nil)
'((safe-charsets . t)
(mime-charset . x-ctext)))
(coding-system-put 'x-ctext 'apel t)
))
;;; @ end
;;;
(require 'product)
(product-provide (provide 'mcs-e20) (require 'apel-ver))
;;; mcs-e20.el ends here