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)
60 (autoload 'base64-encoded-length "mel-dl")
63 (autoload 'base64-encode-string "mel-b"
64 "Encode STRING to base64, and return the result.")
65 (autoload 'base64-decode-string "mel-b"
66 "Decode STRING which is encoded in base64, and return the result.")
67 (autoload 'base64-encode-region "mel-b"
68 "Encode current region by base64." t)
69 (autoload 'base64-decode-region "mel-b"
70 "Decode current region by base64." t)
71 (autoload 'base64-insert-encoded-file "mel-b"
72 "Encode contents of file to base64, and insert the result." t)
74 (autoload 'base64-encoded-length "mel-b")
77 (autoload 'quoted-printable-encode-string "mel-q"
78 "Encode STRING to quoted-printable, and return the result.")
79 (autoload 'quoted-printable-decode-string "mel-q"
80 "Decode STRING which is encoded in quoted-printable, and return the result.")
81 (autoload 'quoted-printable-encode-region "mel-q"
82 "Encode current region by Quoted-Printable." t)
83 (autoload 'quoted-printable-decode-region "mel-q"
84 "Decode current region by Quoted-Printable." t)
85 (autoload 'quoted-printable-insert-encoded-file "mel-q"
86 "Encode contents of file to quoted-printable, and insert the result." t)
88 (autoload 'q-encoding-encode-string "mel-q"
89 "Encode STRING to Q-encoding of encoded-word, and return the result.")
90 (autoload 'q-encoding-decode-string "mel-q"
91 "Decode STRING which is encoded in Q-encoding and return the result.")
92 (autoload 'q-encoding-encoded-length "mel-q")
94 (autoload 'uuencode-encode-region "mel-u"
95 "Encode current region by unofficial uuencode format." t)
96 (autoload 'uuencode-decode-region "mel-u"
97 "Decode current region by unofficial uuencode format." t)
98 (autoload 'uuencode-insert-encoded-file "mel-u"
99 "Insert file encoded by unofficial uuencode format." t)
101 (autoload 'gzip64-encode-region "mel-g"
102 "Encode current region by unofficial x-gzip64 format." t)
103 (autoload 'gzip64-decode-region "mel-g"
104 "Decode current region by unofficial x-gzip64 format." t)
105 (autoload 'gzip64-insert-encoded-file "mel-g"
106 "Insert file encoded by unofficial gzip64 format." t)
113 (defvar mime-encoding-method-alist
114 '(("base64" . base64-encode-region)
115 ("quoted-printable" . quoted-printable-encode-region)
116 ;; Not standard, their use is DISCOURAGED.
117 ;; ("x-uue" . uuencode-encode-region)
118 ;; ("x-gzip64" . gzip64-encode-region)
123 "Alist of encoding vs. corresponding method to encode region.
124 Each element looks like (STRING . FUNCTION) or (STRING . nil).
125 STRING is content-transfer-encoding.
126 FUNCTION is region encoder and nil means not to encode.")
129 (defvar mime-decoding-method-alist
130 '(("base64" . base64-decode-region)
131 ("quoted-printable" . quoted-printable-decode-region)
132 ("x-uue" . uuencode-decode-region)
133 ("x-uuencode" . uuencode-decode-region)
134 ("x-gzip64" . gzip64-decode-region)
136 "Alist of encoding vs. corresponding method to decode region.
137 Each element looks like (STRING . FUNCTION).
138 STRING is content-transfer-encoding.
139 FUNCTION is region decoder.")
142 (defun mime-encode-region (start end encoding)
143 "Encode region START to END of current buffer using ENCODING.
144 ENCODING must be string. If ENCODING is found in
145 `mime-encoding-method-alist' as its key, this function encodes the
146 region by its value."
148 (list (region-beginning) (region-end)
149 (completing-read "encoding: "
150 mime-encoding-method-alist
153 (let ((f (cdr (assoc encoding mime-encoding-method-alist))))
155 (funcall f start end)
159 (defun mime-decode-region (start end encoding)
160 "Decode region START to END of current buffer using ENCODING.
161 ENCODING must be string. If ENCODING is found in
162 `mime-decoding-method-alist' as its key, this function decodes the
163 region by its value."
165 (list (region-beginning) (region-end)
166 (completing-read "encoding: "
167 mime-decoding-method-alist
170 (let ((f (cdr (assoc encoding mime-decoding-method-alist))))
172 (funcall f start end)
180 (defvar mime-file-encoding-method-alist
181 '(("base64" . base64-insert-encoded-file)
182 ("quoted-printable" . quoted-printable-insert-encoded-file)
183 ;; Not standard, their use is DISCOURAGED.
184 ;; ("x-uue" . uuencode-insert-encoded-file)
185 ;; ("x-gzip64" . gzip64-insert-encoded-file)
186 ("7bit" . insert-binary-file-contents)
187 ("8bit" . insert-binary-file-contents)
188 ("binary" . insert-binary-file-contents)
190 "Alist of encoding vs. corresponding method to insert encoded file.
191 Each element looks like (STRING . FUNCTION).
192 STRING is content-transfer-encoding.
193 FUNCTION is function to insert encoded file.")
196 (defun mime-insert-encoded-file (filename encoding)
197 "Insert file FILENAME encoded by ENCODING format."
199 (list (read-file-name "Insert encoded file: ")
200 (completing-read "encoding: "
201 mime-encoding-method-alist
204 (let ((f (cdr (assoc encoding mime-file-encoding-method-alist))))
215 ;;; mel.el ends here.