-;;; 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.
+;; Copyright (C) 1992,95,96,97,98,99,2001 Free Software Foundation, Inc.
;; Author: ENAMI Tsugutomo <enami@sys.ptg.sony.co.jp>
-;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; MORIOKA Tomohiko <tomo@m17n.org>
;; 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
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; along with this program; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Code:
-(require 'poe)
(require 'mime-def)
+(eval-when-compile
+ ;; XXX: the macro `as-binary-process' should be provided when compiling.
+ (require 'pces))
;;; @ variables
:type '(cons (file :tag "Command")(repeat :tag "Arguments" string)))
(defcustom base64-external-decoder-option-to-specify-file '("-o")
- "*list of options of base64 decoder program to specify file."
+ "*list of options of base64 decoder program to specify file.
+If the base64 decoder program does not have such option, set this as nil."
:group 'base64
:type '(repeat :tag "Arguments" string))
(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))
+ (p 0)
+ dest unit)
+ (while (< p len)
+ (setq unit (cons (elt seq p) unit))
+ (setq p (1+ p))
+ (when (zerop (mod p size))
+ (setq dest (cons (nreverse unit) dest))
+ (setq unit nil)))
+ (if unit
+ (nreverse (cons (nreverse unit) dest))
+ (nreverse dest))))
+
+
;;; @ internal base64 encoder
;;; based on base64 decoder by Enami Tsugutomo
`(aref base64-characters ,n))
(defun base64-encode-1 (pack)
- (let ((a (car pack))
- (b (nth 1 pack))
- (c (nth 2 pack)))
- (concat
- (char-to-string (base64-num-to-char (ash a -2)))
- (if b
- (concat
- (char-to-string
- (base64-num-to-char (logior (ash (logand a 3) 4) (ash b -4))))
- (if c
- (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)))
- )
- (concat (char-to-string
- (base64-num-to-char (ash (logand b 15) 2))) "=")
- ))
- (concat (char-to-string
- (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 ((buf (make-string 4 ?=)))
+ (aset buf 0 (base64-num-to-char (ash (car pack) -2)))
+ (if (nth 1 pack)
+ (progn
+ (aset buf 1 (base64-num-to-char
+ (logior (ash (logand (car pack) 3) 4)
+ (ash (nth 1 pack) -4))))
+ (if (nth 2 pack)
+ (progn
+ (aset buf 2 (base64-num-to-char
+ (logior (ash (logand (nth 1 pack) 15) 2)
+ (ash (nth 2 pack) -6))))
+ (aset buf 3 (base64-num-to-char
+ (logand (nth 2 pack) 63))))
+ (aset buf 2 (base64-num-to-char
+ (ash (logand (nth 1 pack) 15) 2)))))
+ (aset buf 1 (base64-num-to-char
+ (ash (logand (car pack) 3) 4))))
+ buf))
+
+(defun-maybe base64-encode-string (string &optional no-line-break)
+ "Base64-encode STRING and return the result.
+Optional second argument NO-LINE-BREAK means do not break long lines
+into shorter lines."
+ (let* ((len (length string))
+ (b 0)(e 57)
+ (dest ""))
(while (< e len)
(setq dest
(concat dest
(function base64-encode-1)
(pack-sequence (substring string b e) 3)
"")
- "\n"))
+ (if (not no-line-break) "\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) "==")
- ))
- )))
-
-(defun base64-internal-encode-region (beg end)
+ e (+ e 57)))
+ (concat dest
+ (mapconcat
+ (function base64-encode-1)
+ (pack-sequence (substring string b) 3)
+ ""))))
+
+(defun base64-internal-encode-region (beg end &optional no-line-break)
(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) no-line-break)
+ (delete-region beg end))))))
;;; @ 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
;;; @ external encoder/decoder
;;;
-(defun base64-external-encode-region (beg end)
+(defun base64-external-encode-region (beg end &optional no-line-break)
(save-excursion
(save-restriction
(narrow-to-region beg end)
(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 ""))
- )))
+ (if no-line-break
+ (progn
+ (goto-char (point-min))
+ (while (search-forward "\n" nil t)
+ (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)))
;;; @ application interfaces
;;;
-(defun-maybe base64-encode-region (start end)
- "Encode current region by base64.
-START and END are buffer positions.
+(defun-maybe base64-encode-region (start end &optional no-line-break)
+ "Base64-encode the region between START and END.
+Return the length of the encoded text.
+Optional third argument NO-LINE-BREAK means do not break long lines
+into shorter lines.
This function calls internal base64 encoder if size of region is
smaller than `base64-internal-encoding-limit', otherwise it calls
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)
- (base64-internal-encode-region start end)))
+ (base64-external-encode-region start end no-line-break)
+ (base64-internal-encode-region start end no-line-break)))
(defun-maybe base64-decode-region (start end)
"Decode current region by base64.
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
- (apply (function call-process-region)
- start end (car base64-external-decoder)
- nil nil nil
- (append (cdr base64-external-decoder)
- base64-external-decoder-option-to-specify-file
- (list filename))))
+ (progn
+ (as-binary-process
+ (apply (function call-process-region)
+ start end (car base64-external-decoder)
+ (null base64-external-decoder-option-to-specify-file)
+ (unless base64-external-decoder-option-to-specify-file
+ (list (current-buffer) nil))
+ nil
+ (delq nil
+ (append
+ (cdr base64-external-decoder)
+ base64-external-decoder-option-to-specify-file
+ (when base64-external-decoder-option-to-specify-file
+ (list filename))))))
+ (unless base64-external-decoder-option-to-specify-file
+ (write-region-as-binary (point-min) (point-max) filename)))
(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
;;;
projects / elisp / flim.git / blobdiff