1 ;;; mel-b-dl.el: Base64 encoder/decoder using DL module
3 ;; Copyright (C) 1998 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Keywords: MIME, Base64
8 ;; This file is part of MEL (MIME Encoding 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.
31 (defvar base64-dl-handle
32 (and (file-exists-p base64-dl-module)
33 (dynamic-link base64-dl-module)))
35 (dynamic-call "emacs_base64_init" base64-dl-handle)
38 (defun base64-encode-region (start end)
39 "Encode current region by base64.
40 START and END are buffer positions."
42 (let ((str (buffer-substring start end)))
43 (delete-region start end)
44 (insert (encode-base64-string str))
50 (defun decode-base64-region (start end)
51 "Decode current region by base64.
52 START and END are buffer positions."
54 (let ((str (buffer-substring start end)))
55 (delete-region start end)
57 (insert (decode-base64-string str))
58 (error (message (nth 1 err)))
61 (defalias 'base64-encode-string 'encode-base64-string)
62 (defalias 'base64-decode-string 'decode-base64-string)
65 (mel-define-method-function (mime-encode-string string (nil "base64"))
66 'encode-base64-string)
67 (mel-define-method-function (mime-decode-string string (nil "base64"))
68 'decode-base64-string)
69 (mel-define-method-function (mime-encode-region start end (nil "base64"))
70 'base64-encode-region)
71 (mel-define-method-function (mime-decode-region start end (nil "base64"))
72 'decode-base64-region)
74 (mel-define-method-function (encoded-text-encode-string string (nil "B"))
75 'encode-base64-string)
77 (mel-define-method encoded-text-decode-string (string (nil "B"))
78 (if (and (string-match B-encoded-text-regexp string)
79 (string= string (match-string 0 string)))
80 (decode-base64-string string)
81 (error "Invalid encoded-text %s" string)))
84 ;;; @ base64 encoder/decoder for file
87 (mel-define-method mime-insert-encoded-file (filename (nil "base64"))
88 "Encode contents of file FILENAME to base64, and insert the result.
89 It calls external base64 encoder specified by
90 `base64-external-encoder'. So you must install the program (maybe
91 mmencode included in metamail or XEmacs package)."
92 (interactive (list (read-file-name "Insert encoded file: ")))
93 (insert (encode-base64-string
95 (set-buffer-multibyte nil)
96 (insert-file-contents-as-binary filename)
102 ;; (mel-define-method mime-write-decoded-region (start end filename
104 ;; "Decode and write current region encoded by base64 into FILENAME.
105 ;; START and END are buffer positions."
107 ;; (list (region-beginning) (region-end)
108 ;; (read-file-name "Write decoded region to file: ")))
109 ;; (let ((str (buffer-substring start end)))
111 ;; (insert (decode-base64-string str))
112 ;; (write-region-as-binary (point-min) (point-max) filename)
121 ;;; mel-b-dl.el ends here.