1 ;;; mel-g.el --- Gzip64 encoder/decoder.
3 ;; Copyright (C) 1995,96,97,98,99,2001 Free Software Foundation, Inc.
5 ;; Author: Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
6 ;; MORIOKA Tomohiko <tomo@m17n.org>
7 ;; Maintainer: Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
9 ;; Keywords: Gzip64, base64, gzip, MIME
11 ;; This file is part of FLIM (Faithful Library about Internet Message).
13 ;; This program is free software; you can redistribute it and/or
14 ;; modify it under the terms of the GNU General Public License as
15 ;; published by the Free Software Foundation; either version 2, or (at
16 ;; your option) any later version.
18 ;; This program is distributed in the hope that it will be useful, but
19 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 ;; General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with this program; see the file COPYING. If not, write to the
25 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
26 ;; Boston, MA 02111-1307, USA.
30 ;;; NOTE: Gzip64 is an experimental Content-Transfer-Encoding and its
31 ;;; use is STRONGLY DISCOURAGED except for private communication.
42 (defvar gzip64-external-encoder
43 (let ((file (exec-installed-p "mmencode")))
45 (` ("sh" "-c" (, (concat "gzip -c | " file))))))
46 "*list of gzip64 encoder program name and its arguments.")
48 (defvar gzip64-external-decoder
49 (let ((file (exec-installed-p "mmencode")))
51 (` ("sh" "-c" (, (concat file " -u | gzip -dc"))))))
52 "*list of gzip64 decoder program name and its arguments.")
54 (unless (and gzip64-external-encoder gzip64-external-decoder)
55 (error "Please install mmencode command."))
57 ;;; @ encoder/decoder for region
60 (defun gzip64-external-encode-region (beg end)
63 (let ((coding-system-for-write 'binary))
64 (apply (function call-process-region)
65 beg end (car gzip64-external-encoder)
67 (cdr gzip64-external-encoder)))
69 ;; regularize line break code
70 ;;(goto-char (point-min))
71 ;;(while (re-search-forward "\r$" nil t)
72 ;; (replace-match ""))
75 (defun gzip64-external-decode-region (beg end)
78 (let ((coding-system-for-read 'binary))
79 (apply (function call-process-region)
80 beg end (car gzip64-external-decoder)
82 (cdr gzip64-external-decoder)))))
84 (mel-define-method-function (mime-encode-region start end (nil "x-gzip64"))
85 'gzip64-external-encode-region)
86 (mel-define-method-function (mime-decode-region start end (nil "x-gzip64"))
87 'gzip64-external-decode-region)
90 ;;; @ encoder/decoder for string
93 (mel-define-method mime-encode-string (string (nil "x-gzip64"))
96 (gzip64-external-encode-region (point-min)(point-max))
99 (mel-define-method mime-decode-string (string (nil "x-gzip64"))
102 (gzip64-external-decode-region (point-min)(point-max))
106 ;;; @ encoder/decoder for file
109 (mel-define-method mime-insert-encoded-file (filename (nil "x-gzip64"))
110 (interactive "*fInsert encoded file: ")
111 (apply (function call-process)
112 (car gzip64-external-encoder)
114 (cdr gzip64-external-encoder)))
116 (mel-define-method mime-write-decoded-region (start end filename
118 "Decode and write current region encoded by gzip64 into FILENAME.
119 START and END are buffer positions."
120 (interactive "*r\nFWrite decoded region to file: ")
121 (let ((coding-system-for-read 'binary)
122 (coding-system-for-write 'binary))
123 (apply (function call-process-region)
124 start end (car gzip64-external-decoder)
126 (let ((args (cdr gzip64-external-decoder)))
127 (append (butlast args)
128 (list (concat (car (last args)) ">" filename)))))))
136 ;;; mel-g.el ends here