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|
;;; qp.el --- Quoted-Printable functions
;; Copyright (C) 1998,99 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; This file is part of GNU Emacs.
;; 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.
;;; Commentary:
;;; Code:
(defvar quoted-printable-encoding-characters
(mapcar 'identity "0123456789ABCDEFabcdef"))
(defun quoted-printable-decode-region (from to)
"Decode quoted-printable in the region between FROM and TO."
(interactive "r")
(save-excursion
(goto-char from)
(while (search-forward "=" to t)
(cond
;; End of the line.
((eq (char-after) ?\n)
(delete-char -1)
(delete-char 1))
;; Encoded character.
((and
(memq (char-after) quoted-printable-encoding-characters)
(memq (char-after (1+ (point)))
quoted-printable-encoding-characters))
(subst-char-in-region
(1- (point)) (point) ?=
(string-to-number
(buffer-substring (point) (+ 2 (point)))
16))
(delete-char 2))
;; Quoted equal sign.
((eq (char-after) ?=)
(delete-char 1))
;; End of buffer.
((eobp)
(delete-char -1))
;; Invalid.
(t
(message "Malformed MIME quoted-printable message"))))))
(defun quoted-printable-decode-string (string)
"Decode the quoted-printable-encoded STRING and return the results."
(with-temp-buffer
(insert string)
(quoted-printable-decode-region (point-min) (point-max))
(buffer-string)))
(defun quoted-printable-encode-region (from to &optional fold class)
"QP-encode the region between FROM and TO.
If FOLD, fold long lines. If CLASS, translate the characters
matched by that regexp."
(interactive "r")
(save-excursion
(save-restriction
(narrow-to-region from to)
;; (mm-encode-body)
;; Encode all the non-ascii and control characters.
(goto-char (point-min))
(while (and (skip-chars-forward
(or class "^\000-\007\013\015-\037\200-\377="))
(not (eobp)))
(insert
(prog1
(upcase (format "=%02x" (char-after)))
(delete-char 1))))
;; Encode white space at the end of lines.
(goto-char (point-min))
(while (re-search-forward "[ \t]+$" nil t)
(goto-char (match-beginning 0))
(while (not (eolp))
(insert
(prog1
(upcase (format "=%02x" (char-after)))
(delete-char 1)))))
(when fold
;; Fold long lines.
(goto-char (point-min))
(while (not (eobp))
(end-of-line)
(while (> (current-column) 72)
(beginning-of-line)
(forward-char 71) ;; 71 char plus an "="
(search-backward "=" (- (point) 2) t)
(insert "=\n")
(end-of-line))
(unless (eobp)
(forward-line)))))))
(defun quoted-printable-encode-string (string)
"QP-encode STRING and return the results."
(mm-with-unibyte-buffer
(insert string)
(quoted-printable-encode-region (point-min) (point-max))
(buffer-string)))
(provide 'qp)
;; qp.el ends here
|
