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.
29 (defconst mel-version "7.2")
35 (defvar mime-temp-directory (or (getenv "MIME_TMP_DIR")
38 "*Directory for temporary files.")
40 (defvar base64-dl-module
41 (and (fboundp 'dynamic-link)
42 (expand-file-name "base64.so" exec-directory)))
48 (cond (base64-dl-module
49 (autoload 'base64-encode-string "mel-dl"
50 "Encode STRING to base64, and return the result.")
51 (autoload 'base64-decode-string "mel-dl"
52 "Decode STRING which is encoded in base64, and return the result.")
53 (autoload 'base64-encode-region "mel-dl"
54 "Encode current region by base64." t)
55 (autoload 'base64-decode-region "mel-dl"
56 "Decode current region by base64." t)
57 (autoload 'base64-insert-encoded-file "mel-dl"
58 "Encode contents of file to base64, and insert the result." t)
59 (autoload 'base64-write-decoded-region "mel-dl"
60 "Decode and write current region encoded by base64 into FILENAME." t)
62 (autoload 'base64-encoded-length "mel-dl")
65 (autoload 'base64-encode-string "mel-b"
66 "Encode STRING to base64, and return the result.")
67 (autoload 'base64-decode-string "mel-b"
68 "Decode STRING which is encoded in base64, and return the result.")
69 (autoload 'base64-encode-region "mel-b"
70 "Encode current region by base64." t)
71 (autoload 'base64-decode-region "mel-b"
72 "Decode current region by base64." t)
73 (autoload 'base64-insert-encoded-file "mel-b"
74 "Encode contents of file to base64, and insert the result." t)
75 (autoload 'base64-write-decoded-region "mel-b"
76 "Decode and write current region encoded by base64 into FILENAME." t)
78 (autoload 'base64-encoded-length "mel-b")
81 (autoload 'quoted-printable-encode-string "mel-q"
82 "Encode STRING to quoted-printable, and return the result.")
83 (autoload 'quoted-printable-decode-string "mel-q"
84 "Decode STRING which is encoded in quoted-printable, and return the result.")
85 (autoload 'quoted-printable-encode-region "mel-q"
86 "Encode current region by Quoted-Printable." t)
87 (autoload 'quoted-printable-decode-region "mel-q"
88 "Decode current region by Quoted-Printable." t)
89 (autoload 'quoted-printable-insert-encoded-file "mel-q"
90 "Encode contents of file to quoted-printable, and insert the result." t)
91 (autoload 'quoted-printable-write-decoded-region "mel-q"
92 "Decode and write current region encoded by quoted-printable into FILENAME."
95 (autoload 'q-encoding-encode-string "mel-q"
96 "Encode STRING to Q-encoding of encoded-word, and return the result.")
97 (autoload 'q-encoding-decode-string "mel-q"
98 "Decode STRING which is encoded in Q-encoding and return the result.")
99 (autoload 'q-encoding-encoded-length "mel-q")
101 (autoload 'uuencode-encode-region "mel-u"
102 "Encode current region by unofficial uuencode format." t)
103 (autoload 'uuencode-decode-region "mel-u"
104 "Decode current region by unofficial uuencode format." t)
105 (autoload 'uuencode-insert-encoded-file "mel-u"
106 "Insert file encoded by unofficial uuencode format." t)
107 (autoload 'uuencode-write-decoded-region "mel-u"
108 "Decode and write current region encoded by uuencode into FILENAME." t)
110 (autoload 'gzip64-encode-region "mel-g"
111 "Encode current region by unofficial x-gzip64 format." t)
112 (autoload 'gzip64-decode-region "mel-g"
113 "Decode current region by unofficial x-gzip64 format." t)
114 (autoload 'gzip64-insert-encoded-file "mel-g"
115 "Insert file encoded by unofficial gzip64 format." t)
116 (autoload 'gzip64-write-decoded-region "mel-g"
117 "Decode and write current region encoded by gzip64 into FILENAME." t)
124 (defvar mime-encoding-method-alist
125 '(("base64" . base64-encode-region)
126 ("quoted-printable" . quoted-printable-encode-region)
127 ;; Not standard, their use is DISCOURAGED.
128 ;; ("x-uue" . uuencode-encode-region)
129 ;; ("x-gzip64" . gzip64-encode-region)
134 "Alist of encoding vs. corresponding method to encode region.
135 Each element looks like (STRING . FUNCTION) or (STRING . nil).
136 STRING is content-transfer-encoding.
137 FUNCTION is region encoder and nil means not to encode.")
140 (defvar mime-decoding-method-alist
141 '(("base64" . base64-decode-region)
142 ("quoted-printable" . quoted-printable-decode-region)
143 ("x-uue" . uuencode-decode-region)
144 ("x-uuencode" . uuencode-decode-region)
145 ("x-gzip64" . gzip64-decode-region)
147 "Alist of encoding vs. corresponding method to decode region.
148 Each element looks like (STRING . FUNCTION).
149 STRING is content-transfer-encoding.
150 FUNCTION is region decoder.")
153 (defun mime-encode-region (start end encoding)
154 "Encode region START to END of current buffer using ENCODING.
155 ENCODING must be string. If ENCODING is found in
156 `mime-encoding-method-alist' as its key, this function encodes the
157 region by its value."
159 (list (region-beginning) (region-end)
160 (completing-read "encoding: "
161 mime-encoding-method-alist
164 (let ((f (cdr (assoc encoding mime-encoding-method-alist))))
166 (funcall f start end)
170 (defun mime-decode-region (start end encoding)
171 "Decode region START to END of current buffer using ENCODING.
172 ENCODING must be string. If ENCODING is found in
173 `mime-decoding-method-alist' as its key, this function decodes the
174 region by its value."
176 (list (region-beginning) (region-end)
177 (completing-read "encoding: "
178 mime-decoding-method-alist
181 (let ((f (cdr (assoc encoding mime-decoding-method-alist))))
183 (funcall f start end)
191 (defvar mime-file-encoding-method-alist
192 '(("base64" . base64-insert-encoded-file)
193 ("quoted-printable" . quoted-printable-insert-encoded-file)
194 ;; Not standard, their use is DISCOURAGED.
195 ;; ("x-uue" . uuencode-insert-encoded-file)
196 ;; ("x-gzip64" . gzip64-insert-encoded-file)
197 ("7bit" . insert-binary-file-contents)
198 ("8bit" . insert-binary-file-contents)
199 ("binary" . insert-binary-file-contents)
201 "Alist of encoding vs. corresponding method to insert encoded file.
202 Each element looks like (STRING . FUNCTION).
203 STRING is content-transfer-encoding.
204 FUNCTION is function to insert encoded file.")
207 (defvar mime-file-decoding-method-alist
208 '(("base64" . base64-write-decoded-region)
209 ("quoted-printable" . quoted-printable-write-decoded-region)
210 ("x-uue" . uuencode-write-decoded-region)
211 ("x-gzip64" . gzip64-write-decoded-region)
212 ("7bit" . write-region-as-binary)
213 ("8bit" . write-region-as-binary)
214 ("binary" . write-region-as-binary)
216 "Alist of encoding vs. corresponding method to write decoded region to file.
217 Each element looks like (STRING . FUNCTION).
218 STRING is content-transfer-encoding.
219 FUNCTION is function to write decoded region to file.")
222 (defun mime-insert-encoded-file (filename encoding)
223 "Insert file FILENAME encoded by ENCODING format."
225 (list (read-file-name "Insert encoded file: ")
226 (completing-read "encoding: "
227 mime-encoding-method-alist
230 (let ((f (cdr (assoc encoding mime-file-encoding-method-alist))))
236 (defun mime-write-decoded-region (start end filename encoding)
237 "Decode and write current region encoded by ENCODING into FILENAME.
238 START and END are buffer positions."
239 (list (region-beginning) (region-end)
240 (read-file-name "Write decoded region to file: ")
241 (completing-read "encoding: "
242 mime-file-decoding-method-alist
244 (let ((f (cdr (assoc encoding mime-file-decoding-method-alist))))
246 (funcall f start end filename)
255 ;;; mel.el ends here.