-;;; base64.el,v --- Base64 encoding functions
-;; Author: Kyle E. Jones
-;; Created: 1997/03/12 14:37:09
-;; Version: 1.6
-;; Keywords: extensions
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;;; Copyright (C) 1997 Kyle E. Jones
-;;;
-;;; This file is not part of GNU Emacs, but the same permissions apply.
-;;;
-;;; GNU Emacs is free software; you can redistribute it and/or modify
-;;; it under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 2, or (at your option)
-;;; any later version.
-;;;
-;;; GNU Emacs is distributed in the hope that it will be useful,
-;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;; GNU 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.
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(require 'poe)
-
-;; For non-MULE
-(if (not (fboundp 'char-int))
- (fset 'char-int 'identity))
-
-(defvar base64-alphabet
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/")
+;;; base64.el --- Base64 encoding functions using MEL
+;; Copyright (C) 2000, 2001 Free Software Foundation, Inc.
-(defvar base64-decoder-program nil
- "*Non-nil value should be a string that names a MIME base64 decoder.
-The program should expect to read base64 data on its standard
-input and write the converted data to its standard output.")
-
-(defvar base64-decoder-switches nil
- "*List of command line flags passed to the command named by
-base64-decoder-program.")
-
-(defvar base64-encoder-program nil
- "*Non-nil value should be a string that names a MIME base64 encoder.
-The program should expect arbitrary data on its standard
-input and write base64 data to its standard output.")
-
-(defvar base64-encoder-switches nil
- "*List of command line flags passed to the command named by
-base64-encoder-program.")
+;; Author: T-gnus development team
+;; Keywords: extensions
-(defconst base64-alphabet-decoding-alist
- '(
- ( ?A . 00) ( ?B . 01) ( ?C . 02) ( ?D . 03) ( ?E . 04) ( ?F . 05)
- ( ?G . 06) ( ?H . 07) ( ?I . 08) ( ?J . 09) ( ?K . 10) ( ?L . 11)
- ( ?M . 12) ( ?N . 13) ( ?O . 14) ( ?P . 15) ( ?Q . 16) ( ?R . 17)
- ( ?S . 18) ( ?T . 19) ( ?U . 20) ( ?V . 21) ( ?W . 22) ( ?X . 23)
- ( ?Y . 24) ( ?Z . 25) ( ?a . 26) ( ?b . 27) ( ?c . 28) ( ?d . 29)
- ( ?e . 30) ( ?f . 31) ( ?g . 32) ( ?h . 33) ( ?i . 34) ( ?j . 35)
- ( ?k . 36) ( ?l . 37) ( ?m . 38) ( ?n . 39) ( ?o . 40) ( ?p . 41)
- ( ?q . 42) ( ?r . 43) ( ?s . 44) ( ?t . 45) ( ?u . 46) ( ?v . 47)
- ( ?w . 48) ( ?x . 49) ( ?y . 50) ( ?z . 51) ( ?0 . 52) ( ?1 . 53)
- ( ?2 . 54) ( ?3 . 55) ( ?4 . 56) ( ?5 . 57) ( ?6 . 58) ( ?7 . 59)
- ( ?8 . 60) ( ?9 . 61) ( ?+ . 62) ( ?/ . 63)
- ))
+;; This file is part of T-gnus.
-(defvar base64-alphabet-decoding-vector
- (let ((v (make-vector 123 nil))
- (p base64-alphabet-decoding-alist))
- (while p
- (aset v (car (car p)) (cdr (car p)))
- (setq p (cdr p)))
- v))
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
-(defvar base64-binary-coding-system 'binary)
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
-(defun base64-run-command-on-region (start end output-buffer command
- &rest arg-list)
- (let ((tempfile nil) status errstring default-process-coding-system
- (coding-system-for-write base64-binary-coding-system)
- (coding-system-for-read base64-binary-coding-system))
- (unwind-protect
- (progn
- (setq tempfile (make-temp-name "base64"))
- (setq status
- (apply 'call-process-region
- start end command nil
- (list output-buffer tempfile)
- nil arg-list))
- (cond ((equal status 0) t)
- ((zerop (save-excursion
- (set-buffer (find-file-noselect tempfile))
- (buffer-size)))
- t)
- (t (save-excursion
- (set-buffer (find-file-noselect tempfile))
- (setq errstring (buffer-string))
- (kill-buffer nil)
- (cons status errstring)))))
- (ignore-errors
- (delete-file tempfile)))))
+;; You should have received a copy of the GNU General Public License
+;; 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.
-(if (string-match "XEmacs" emacs-version)
- (defalias 'base64-insert-char 'insert-char)
- (defun base64-insert-char (char &optional count ignored buffer)
- (if (or (null buffer) (eq buffer (current-buffer)))
- (insert-char char count)
- (with-current-buffer buffer
- (insert-char char count))))
- (setq base64-binary-coding-system 'raw-text))
+;;; Commentary:
-(defun-maybe base64-decode-region (start end)
- (interactive "r")
- ;;(message "Decoding base64...")
- (let ((work-buffer nil)
- (done nil)
- (counter 0)
- (bits 0)
- (lim 0) inputpos
- (non-data-chars (concat "^=" base64-alphabet)))
- (unwind-protect
- (save-excursion
- (setq work-buffer (generate-new-buffer " *base64-work*"))
- (buffer-disable-undo work-buffer)
- (if base64-decoder-program
- (let* ((binary-process-output t) ; any text already has CRLFs
- (status (apply 'base64-run-command-on-region
- start end work-buffer
- base64-decoder-program
- base64-decoder-switches)))
- (if (not (eq status t))
- (error "%s" (cdr status))))
- (goto-char start)
- (skip-chars-forward non-data-chars end)
- (while (not done)
- (setq inputpos (point))
- (cond
- ((> (skip-chars-forward base64-alphabet end) 0)
- (setq lim (point))
- (while (< inputpos lim)
- (setq bits (+ bits
- (aref base64-alphabet-decoding-vector
- (char-int (char-after inputpos)))))
- (setq counter (1+ counter)
- inputpos (1+ inputpos))
- (cond ((= counter 4)
- (base64-insert-char (lsh bits -16) 1 nil work-buffer)
- (base64-insert-char (logand (lsh bits -8) 255) 1 nil
- work-buffer)
- (base64-insert-char (logand bits 255) 1 nil
- work-buffer)
- (setq bits 0 counter 0))
- (t (setq bits (lsh bits 6)))))))
- (cond
- ((= (point) end)
- (if (not (zerop counter))
- (error "at least %d bits missing at end of base64 encoding"
- (* (- 4 counter) 6)))
- (setq done t))
- ((eq (char-after (point)) ?=)
- (setq done t)
- (cond ((= counter 1)
- (error "at least 2 bits missing at end of base64 encoding"))
- ((= counter 2)
- (base64-insert-char (lsh bits -10) 1 nil work-buffer))
- ((= counter 3)
- (base64-insert-char (lsh bits -16) 1 nil work-buffer)
- (base64-insert-char (logand (lsh bits -8) 255)
- 1 nil work-buffer))
- ((= counter 0) t)))
- (t (skip-chars-forward non-data-chars end)))))
- (or (markerp end) (setq end (set-marker (make-marker) end)))
- (goto-char start)
- (insert-buffer-substring work-buffer)
- (delete-region (point) end))
- (and work-buffer (kill-buffer work-buffer))))
- ;;(message "Decoding base64... done")
- )
+;;; Code:
-(defun-maybe base64-encode-region (start end &optional no-line-break)
- (interactive "r")
- (message "Encoding base64...")
- (let ((work-buffer nil)
- (counter 0)
- (cols 0)
- (bits 0)
- (alphabet base64-alphabet)
- inputpos)
- (unwind-protect
- (save-excursion
- (setq work-buffer (generate-new-buffer " *base64-work*"))
- (buffer-disable-undo work-buffer)
- (if base64-encoder-program
- (let ((status (apply 'base64-run-command-on-region
- start end work-buffer
- base64-encoder-program
- base64-encoder-switches)))
- (if (not (eq status t))
- (error "%s" (cdr status))))
- (setq inputpos start)
- (while (< inputpos end)
- (setq bits (+ bits (char-int (char-after inputpos))))
- (setq counter (1+ counter))
- (cond ((= counter 3)
- (base64-insert-char (aref alphabet (lsh bits -18)) 1 nil
- work-buffer)
- (base64-insert-char
- (aref alphabet (logand (lsh bits -12) 63))
- 1 nil work-buffer)
- (base64-insert-char
- (aref alphabet (logand (lsh bits -6) 63))
- 1 nil work-buffer)
- (base64-insert-char
- (aref alphabet (logand bits 63))
- 1 nil work-buffer)
- (setq cols (+ cols 4))
- (cond ((and (= cols 72)
- (not no-line-break))
- (base64-insert-char ?\n 1 nil work-buffer)
- (setq cols 0)))
- (setq bits 0 counter 0))
- (t (setq bits (lsh bits 8))))
- (setq inputpos (1+ inputpos)))
- ;; write out any remaining bits with appropriate padding
- (if (= counter 0)
- nil
- (setq bits (lsh bits (- 16 (* 8 counter))))
- (base64-insert-char (aref alphabet (lsh bits -18)) 1 nil
- work-buffer)
- (base64-insert-char (aref alphabet (logand (lsh bits -12) 63))
- 1 nil work-buffer)
- (if (= counter 1)
- (base64-insert-char ?= 2 nil work-buffer)
- (base64-insert-char (aref alphabet (logand (lsh bits -6) 63))
- 1 nil work-buffer)
- (base64-insert-char ?= 1 nil work-buffer)))
- (if (and (> cols 0)
- (not no-line-break))
- (base64-insert-char ?\n 1 nil work-buffer)))
- (or (markerp end) (setq end (set-marker (make-marker) end)))
- (goto-char start)
- (insert-buffer-substring work-buffer)
- (delete-region (point) end))
- (and work-buffer (kill-buffer work-buffer))))
- (message "Encoding base64... done"))
+(eval-and-compile
+ (defun base64-autoload-functionp (object)
+ (if (functionp object)
+ (let ((def object))
+ (while (and (symbolp def) (fboundp def))
+ (setq def (symbol-function def)))
+ (eq (car-safe def) 'autoload))))
-(defun base64-encode (string)
- (save-excursion
- (set-buffer (get-buffer-create " *base64-encode*"))
- (erase-buffer)
- (insert string)
- (base64-encode-region (point-min) (point-max))
- (skip-chars-backward " \t\r\n")
- (delete-region (point-max) (point))
- (prog1
- (buffer-string)
- (kill-buffer (current-buffer)))))
+ (if (base64-autoload-functionp 'base64-decode-string)
+ (fmakunbound 'base64-decode-string))
+ (if (base64-autoload-functionp 'base64-decode-region)
+ (fmakunbound 'base64-decode-region))
+ (if (base64-autoload-functionp 'base64-encode-string)
+ (fmakunbound 'base64-encode-string))
+ (if (base64-autoload-functionp 'base64-encode-region)
+ (fmakunbound 'base64-encode-region))
-(defun base64-decode (string)
- (save-excursion
- (set-buffer (get-buffer-create " *base64-decode*"))
- (erase-buffer)
- (insert string)
- (base64-decode-region (point-min) (point-max))
- (goto-char (point-max))
- (skip-chars-backward " \t\r\n")
- (delete-region (point-max) (point))
- (prog1
- (buffer-string)
- (kill-buffer (current-buffer)))))
+ (require 'mel)
-(fset 'base64-decode-string 'base64-decode)
-(fset 'base64-encode-string 'base64-encode)
+ (mel-find-function 'mime-decode-string "base64")
+ (mel-find-function 'mime-decode-region "base64")
+ (mel-find-function 'mime-encode-string "base64")
+ (mel-find-function 'mime-encode-region "base64"))
(provide 'base64)
+
+;;; base64.el ends here
projects / elisp / gnus.git- / blobdiff