;;; mel-b-el.el --- Base64 encoder/decoder.
-;; Copyright (C) 1992,1995,1996,1997,1998 Free Software Foundation, Inc.
+;; Copyright (C) 1992,1995,1996,1997,1998,1999 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
(ash (logand (car pack) 3) 4))))
buf))
-(defun-maybe base64-encode-string (string)
- "Encode STRING to base64, and return the result."
+(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 ""))
(function base64-encode-1)
(pack-sequence (substring string b e) 3)
"")
- "\n"))
+ (if (not no-line-break) "\n")))
(setq b e
e (+ e 57)))
(concat dest
(pack-sequence (substring string b) 3)
""))))
-(defun base64-internal-encode-region (beg end)
+(defun base64-internal-encode-region (beg end &optional no-line-break)
(save-excursion
(save-restriction
(narrow-to-region beg end)
(insert
(prog1
- (base64-encode-string
- (buffer-substring beg end))
- (delete-region beg end)))
- (or (bolp) (insert ?\n)))))
+ (base64-encode-string (buffer-substring beg end) no-line-break)
+ (delete-region beg end))))))
;;; @ internal base64 decoder
;;; @ 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)
;; regularize line break code
(goto-char (point-min))
(while (re-search-forward "\r$" nil t)
- (replace-match "")))))
+ (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
;;; @ 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
(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.
(mime-write-decoded-region start end filename (nil "base64"))
'base64-write-decoded-region)
-
+
;;; @ end
;;;