-;;; mel-b-el.el: Base64 encoder/decoder for GNU Emacs
+;;; mel-b-el.el --- Base64 encoder/decoder.
;; Copyright (C) 1992,1995,1996,1997,1998 Free Software Foundation, Inc.
;; Author: ENAMI Tsugutomo <enami@sys.ptg.sony.co.jp>
-;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Created: 1995/6/24
;; Keywords: MIME, Base64
-;; This file is part of MEL (MIME Encoding Library).
+;; This file is part of FLIM (Faithful Library about Internet Message).
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; along with this program; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
-(require 'poe)
(require 'mime-def)
(integer :tag "Size")))
+;;; @ utility function
+;;;
+
+(defun pack-sequence (seq size)
+ "Split sequence SEQ into SIZE elements packs, and return list of packs.
+\[mel-b-el; tl-seq function]"
+ (let ((len (length seq))
+ (i 0)(p 0)
+ dest unit)
+ (while (< p len)
+ (setq unit (cons (elt seq p) unit))
+ (setq i (1+ i))
+ (setq p (1+ p))
+ (if (= i size)
+ (progn
+ (setq dest (cons (nreverse unit) dest))
+ (setq unit nil)
+ (setq i 0))))
+ (nreverse
+ (if unit
+ (cons (nreverse unit) dest)
+ dest))))
+
+
;;; @ internal base64 encoder
;;; based on base64 decoder by Enami Tsugutomo
(concat
(char-to-string
(base64-num-to-char (logior (ash (logand b 15) 2) (ash c -6))))
- (char-to-string (base64-num-to-char (logand c 63)))
- )
+ (char-to-string (base64-num-to-char (logand c 63))))
(concat (char-to-string
- (base64-num-to-char (ash (logand b 15) 2))) "=")
- ))
+ (base64-num-to-char (ash (logand b 15) 2))) "=")))
(concat (char-to-string
- (base64-num-to-char (ash (logand a 3) 4))) "==")
- ))))
+ (base64-num-to-char (ash (logand a 3) 4))) "==")))))
(defun-maybe base64-encode-string (string)
"Encode STRING to base64, and return the result."
- (let ((len (length string))
- (b 0)(e 57)
- dest)
+ (let* ((len (length string))
+ (m (mod len 3))
+ (b 0)(e 57)
+ dest)
(while (< e len)
(setq dest
(concat dest
"")
"\n"))
(setq b e
- e (+ e 57)
- )
- )
- (let* ((es (mapconcat
- (function base64-encode-1)
- (pack-sequence (substring string b) 3)
- ""))
- (m (mod (length es) 4))
- )
- (concat dest es (cond ((= m 3) "=")
- ((= m 2) "==")
- ))
- )))
+ e (+ e 57)))
+ (concat dest
+ (mapconcat
+ (function base64-encode-1)
+ (pack-sequence (substring string b) 3)
+ "")
+ (cond ((= m 2) "=")
+ ((= m 1) "==")))))
(defun base64-internal-encode-region (beg end)
(save-excursion
(save-restriction
(narrow-to-region beg end)
- (let ((str (buffer-substring beg end)))
- (delete-region beg end)
- (insert (base64-encode-string str))
- )
- (or (bolp)
- (insert "\n")
- )
- )))
+ (insert
+ (prog1
+ (base64-encode-string
+ (buffer-substring beg end))
+ (delete-region beg end)))
+ (or (bolp) (insert ?\n)))))
;;; @ internal base64 decoder
(defsubst base64-internal-decode (string buffer)
(let* ((len (length string))
- (i 0)
- (j 0)
+ (i 0)(j 0)
v1 v2 v3)
(catch 'tag
(while (< i len)
(if v4
(aset buffer (prog1 j (setq j (1+ j)))
(logior (lsh (logand v3 3) 6) v4))
- (throw 'tag nil)
- ))
- (throw 'tag nil)
- ))))
- (substring buffer 0 j)
- ))
+ (throw 'tag nil)))
+ (throw 'tag nil)))))
+ (substring buffer 0 j)))
(defun base64-internal-decode-string (string)
(base64-internal-decode string (make-string (length string) 0)))
(defun base64-internal-decode-region (beg end)
(save-excursion
(let ((str (string-as-unibyte (buffer-substring beg end))))
- (delete-region beg end)
- (goto-char beg)
- (insert (base64-internal-decode str str)))))
+ (insert
+ (prog1
+ (base64-internal-decode str str)
+ (delete-region beg end))))))
;; (defun base64-internal-decode-region2 (beg end)
;; (save-excursion
(as-binary-process
(apply (function call-process-region)
beg end (car base64-external-encoder)
- t t nil (cdr base64-external-encoder)))
+ t t nil
+ (cdr base64-external-encoder)))
;; for OS/2
;; regularize line break code
(goto-char (point-min))
(while (re-search-forward "\r$" nil t)
- (replace-match ""))
- )))
+ (replace-match "")))))
(defun base64-external-decode-region (beg end)
(save-excursion
(as-binary-process
(apply (function call-process-region)
beg end (car base64-external-decoder)
- t t nil (cdr base64-external-decoder)))
- ))
+ t t nil
+ (cdr base64-external-decoder)))))
(defun base64-external-decode-string (string)
(with-temp-buffer
(insert string)
(as-binary-process
(apply (function call-process-region)
- (point-min) (point-max)
- (car base64-external-decoder)
- t t nil (cdr base64-external-decoder)))
+ (point-min)(point-max) (car base64-external-decoder)
+ t t nil
+ (cdr base64-external-decoder)))
(buffer-string)))
external base64 encoder specified by `base64-external-encoder'. In
this case, you must install the program (maybe mmencode included in
metamail or XEmacs package)."
- (interactive "r")
+ (interactive "*r")
(if (and base64-internal-encoding-limit
(> (- end start) base64-internal-encoding-limit))
(base64-external-encode-region start end)
external base64 decoder specified by `base64-external-decoder'. In
this case, you must install the program (maybe mmencode included in
metamail or XEmacs package)."
- (interactive "r")
+ (interactive "*r")
(if (and base64-internal-decoding-limit
(> (- end start) base64-internal-decoding-limit))
(base64-external-decode-region start end)
external base64 decoder specified by `base64-external-decoder'. In
this case, you must install the program (maybe mmencode included in
metamail or XEmacs package)."
- (interactive "r")
(if (and base64-internal-decoding-limit
(> (length string) base64-internal-decoding-limit))
(base64-external-decode-string string)
'base64-encode-string)
(mel-define-method encoded-text-decode-string (string (nil "B"))
- (if (and (string-match B-encoded-text-regexp string)
- (string= string (match-string 0 string)))
+ (if (string-match (eval-when-compile
+ (concat "\\`" B-encoded-text-regexp "\\'"))
+ string)
(base64-decode-string string)
(error "Invalid encoded-text %s" string)))
It calls external base64 encoder specified by
`base64-external-encoder'. So you must install the program (maybe
mmencode included in metamail or XEmacs package)."
- (interactive (list (read-file-name "Insert encoded file: ")))
+ (interactive "*fInsert encoded file: ")
(if (and base64-internal-encoding-limit
(> (nth 7 (file-attributes filename))
base64-internal-encoding-limit))
- (apply (function call-process) (car base64-external-encoder)
- filename t nil (cdr base64-external-encoder))
+ (apply (function call-process)
+ (car base64-external-encoder)
+ filename t nil
+ (cdr base64-external-encoder))
(insert
(base64-encode-string
(with-temp-buffer
(set-buffer-multibyte nil)
(insert-file-contents-as-binary filename)
(buffer-string))))
- (or (bolp)
- (insert "\n"))
- ))
+ (or (bolp) (insert ?\n))))
(mel-define-method-function (mime-insert-encoded-file filename (nil "base64"))
'base64-insert-encoded-file)
(defun base64-write-decoded-region (start end filename)
"Decode and write current region encoded by base64 into FILENAME.
START and END are buffer positions."
- (interactive
- (list (region-beginning) (region-end)
- (read-file-name "Write decoded region to file: ")))
+ (interactive "*r\nFWrite decoded region to file: ")
(if (and base64-internal-decoding-limit
(> (- end start) base64-internal-decoding-limit))
(as-binary-process
(let ((str (buffer-substring start end)))
(with-temp-buffer
(insert (base64-internal-decode-string str))
- (write-region-as-binary (point-min) (point-max) filename)
- ))))
+ (write-region-as-binary (point-min) (point-max) filename)))))
(mel-define-method-function
(mime-write-decoded-region start end filename (nil "base64"))
'base64-write-decoded-region)
-;;; @ etc
-;;;
-
-(defun pack-sequence (seq size)
- "Split sequence SEQ into SIZE elements packs,
-and return list of packs. [mel-b-el; tl-seq function]"
- (let ((len (length seq)) (p 0) obj
- unit (i 0)
- dest)
- (while (< p len)
- (setq obj (elt seq p))
- (setq unit (cons obj unit))
- (setq i (1+ i))
- (if (= i size)
- (progn
- (setq dest (cons (reverse unit) dest))
- (setq unit nil)
- (setq i 0)
- ))
- (setq p (1+ p))
- )
- (if unit
- (setq dest (cons (reverse unit) dest))
- )
- (reverse dest)
- ))
-
-
;;; @ end
;;;
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