1 ;;; mel.el : a MIME encoding/decoding library
3 ;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; modified by Shuhei KOBAYASHI <shuhei-k@jaist.ac.jp>
8 ;; Keywords: MIME, Base64, Quoted-Printable, uuencode, gzip64
10 ;; This file is part of MEL (MIME Encoding Library).
12 ;; This program is free software; you can redistribute it and/or
13 ;; modify it under the terms of the GNU General Public License as
14 ;; published by the Free Software Foundation; either version 2, or (at
15 ;; your option) any later version.
17 ;; This program is distributed in the hope that it will be useful, but
18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 ;; General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 ;; Boston, MA 02111-1307, USA.
31 (defconst mel-version "7.3")
37 (defvar mime-temp-directory (or (getenv "MIME_TMP_DIR")
40 "*Directory for temporary files.")
42 (defvar base64-dl-module
43 (and (fboundp 'dynamic-link)
44 (expand-file-name "base64.so" exec-directory)))
50 (cond (base64-dl-module
51 (autoload 'base64-encode-string "mel-dl"
52 "Encode STRING to base64, and return the result.")
53 (autoload 'base64-decode-string "mel-dl"
54 "Decode STRING which is encoded in base64, and return the result.")
55 (autoload 'base64-encode-region "mel-dl"
56 "Encode current region by base64." t)
57 (autoload 'base64-decode-region "mel-dl"
58 "Decode current region by base64." t)
59 (autoload 'base64-insert-encoded-file "mel-dl"
60 "Encode contents of file to base64, and insert the result." t)
61 (autoload 'base64-write-decoded-region "mel-dl"
62 "Decode and write current region encoded by base64 into FILENAME." t)
64 (autoload 'base64-encoded-length "mel-dl")
67 (autoload 'base64-encode-string "mel-b"
68 "Encode STRING to base64, and return the result.")
69 (autoload 'base64-decode-string "mel-b"
70 "Decode STRING which is encoded in base64, and return the result.")
71 (autoload 'base64-encode-region "mel-b"
72 "Encode current region by base64." t)
73 (autoload 'base64-decode-region "mel-b"
74 "Decode current region by base64." t)
75 (autoload 'base64-insert-encoded-file "mel-b"
76 "Encode contents of file to base64, and insert the result." t)
77 (autoload 'base64-write-decoded-region "mel-b"
78 "Decode and write current region encoded by base64 into FILENAME." t)
80 (autoload 'base64-encoded-length "mel-b")
83 (autoload 'quoted-printable-encode-string "mel-q"
84 "Encode STRING to quoted-printable, and return the result.")
85 (autoload 'quoted-printable-decode-string "mel-q"
86 "Decode STRING which is encoded in quoted-printable, and return the result.")
87 (autoload 'quoted-printable-encode-region "mel-q"
88 "Encode current region by Quoted-Printable." t)
89 (autoload 'quoted-printable-decode-region "mel-q"
90 "Decode current region by Quoted-Printable." t)
91 (autoload 'quoted-printable-insert-encoded-file "mel-q"
92 "Encode contents of file to quoted-printable, and insert the result." t)
93 (autoload 'quoted-printable-write-decoded-region "mel-q"
94 "Decode and write current region encoded by quoted-printable into FILENAME."
97 (autoload 'q-encoding-encode-string "mel-q"
98 "Encode STRING to Q-encoding of encoded-word, and return the result.")
99 (autoload 'q-encoding-decode-string "mel-q"
100 "Decode STRING which is encoded in Q-encoding and return the result.")
101 (autoload 'q-encoding-encoded-length "mel-q")
103 (autoload 'uuencode-encode-region "mel-u"
104 "Encode current region by unofficial uuencode format." t)
105 (autoload 'uuencode-decode-region "mel-u"
106 "Decode current region by unofficial uuencode format." t)
107 (autoload 'uuencode-insert-encoded-file "mel-u"
108 "Insert file encoded by unofficial uuencode format." t)
109 (autoload 'uuencode-write-decoded-region "mel-u"
110 "Decode and write current region encoded by uuencode into FILENAME." t)
112 (autoload 'gzip64-encode-region "mel-g"
113 "Encode current region by unofficial x-gzip64 format." t)
114 (autoload 'gzip64-decode-region "mel-g"
115 "Decode current region by unofficial x-gzip64 format." t)
116 (autoload 'gzip64-insert-encoded-file "mel-g"
117 "Insert file encoded by unofficial gzip64 format." t)
118 (autoload 'gzip64-write-decoded-region "mel-g"
119 "Decode and write current region encoded by gzip64 into FILENAME." t)
126 (defvar mime-encoding-method-alist
127 '(("base64" . base64-encode-region)
128 ("quoted-printable" . quoted-printable-encode-region)
129 ;; Not standard, their use is DISCOURAGED.
130 ;; ("x-uue" . uuencode-encode-region)
131 ;; ("x-gzip64" . gzip64-encode-region)
136 "Alist of encoding vs. corresponding method to encode region.
137 Each element looks like (STRING . FUNCTION) or (STRING . nil).
138 STRING is content-transfer-encoding.
139 FUNCTION is region encoder and nil means not to encode.")
142 (defvar mime-decoding-method-alist
143 '(("base64" . base64-decode-region)
144 ("quoted-printable" . quoted-printable-decode-region)
145 ("x-uue" . uuencode-decode-region)
146 ("x-uuencode" . uuencode-decode-region)
147 ("x-gzip64" . gzip64-decode-region)
149 "Alist of encoding vs. corresponding method to decode region.
150 Each element looks like (STRING . FUNCTION).
151 STRING is content-transfer-encoding.
152 FUNCTION is region decoder.")
155 (defun mime-encode-region (start end encoding)
156 "Encode region START to END of current buffer using ENCODING.
157 ENCODING must be string. If ENCODING is found in
158 `mime-encoding-method-alist' as its key, this function encodes the
159 region by its value."
161 (list (region-beginning) (region-end)
162 (completing-read "encoding: "
163 mime-encoding-method-alist
166 (let ((f (cdr (assoc encoding mime-encoding-method-alist))))
168 (funcall f start end)
172 (defun mime-decode-region (start end encoding)
173 "Decode region START to END of current buffer using ENCODING.
174 ENCODING must be string. If ENCODING is found in
175 `mime-decoding-method-alist' as its key, this function decodes the
176 region by its value."
178 (list (region-beginning) (region-end)
179 (completing-read "encoding: "
180 mime-decoding-method-alist
183 (let ((f (cdr (assoc encoding mime-decoding-method-alist))))
185 (funcall f start end)
193 (defvar mime-file-encoding-method-alist
194 '(("base64" . base64-insert-encoded-file)
195 ("quoted-printable" . quoted-printable-insert-encoded-file)
196 ;; Not standard, their use is DISCOURAGED.
197 ;; ("x-uue" . uuencode-insert-encoded-file)
198 ;; ("x-gzip64" . gzip64-insert-encoded-file)
199 ("7bit" . insert-file-contents-as-binary)
200 ("8bit" . insert-file-contents-as-binary)
201 ("binary" . insert-file-contents-as-binary)
203 "Alist of encoding vs. corresponding method to insert encoded file.
204 Each element looks like (STRING . FUNCTION).
205 STRING is content-transfer-encoding.
206 FUNCTION is function to insert encoded file.")
209 (defvar mime-file-decoding-method-alist
210 '(("base64" . base64-write-decoded-region)
211 ("quoted-printable" . quoted-printable-write-decoded-region)
212 ("x-uue" . uuencode-write-decoded-region)
213 ("x-gzip64" . gzip64-write-decoded-region)
214 ("7bit" . write-region-as-binary)
215 ("8bit" . write-region-as-binary)
216 ("binary" . write-region-as-binary)
218 "Alist of encoding vs. corresponding method to write decoded region to file.
219 Each element looks like (STRING . FUNCTION).
220 STRING is content-transfer-encoding.
221 FUNCTION is function to write decoded region to file.")
224 (defun mime-insert-encoded-file (filename encoding)
225 "Insert file FILENAME encoded by ENCODING format."
227 (list (read-file-name "Insert encoded file: ")
228 (completing-read "encoding: "
229 mime-encoding-method-alist
232 (let ((f (cdr (assoc encoding mime-file-encoding-method-alist))))
238 (defun mime-write-decoded-region (start end filename encoding)
239 "Decode and write current region encoded by ENCODING into FILENAME.
240 START and END are buffer positions."
242 (list (region-beginning) (region-end)
243 (read-file-name "Write decoded region to file: ")
244 (completing-read "encoding: "
245 mime-file-decoding-method-alist
247 (let ((f (cdr (assoc encoding mime-file-decoding-method-alist))))
249 (funcall f start end filename)
258 ;;; mel.el ends here.