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;;; undigest.el --- digest-cracking support for the RMAIL mail reader
;; Copyright (C) 1985, 1986 Free Software Foundation, Inc.
;; 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.
;; note Interent RFP934
(defun undigestify-rmail-message ()
"Break up a digest message into its constituent messages.
Leaves original message, deleted, before the undigestified messages."
(interactive)
(widen)
(let ((buffer-read-only nil)
(msg-string (buffer-substring (rmail-msgbeg rmail-current-message)
(rmail-msgend rmail-current-message))))
(goto-char (rmail-msgend rmail-current-message))
(narrow-to-region (point) (point))
(insert msg-string)
(narrow-to-region (point-min) (1- (point-max))))
(let ((error t)
(buffer-read-only nil))
(unwind-protect
(progn
(save-restriction
(goto-char (point-min))
(delete-region (point-min)
(progn (search-forward "\n*** EOOH ***\n")
(point)))
(insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
(narrow-to-region (point)
(point-max))
(let* ((fill-prefix "")
(case-fold-search t)
(digest-name
(mail-strip-quoted-names
(or (save-restriction
(search-forward "\n\n")
(narrow-to-region (point-min) (point))
(goto-char (point-max))
(or (mail-fetch-field "Reply-To")
(mail-fetch-field "To")
(mail-fetch-field "Apparently-To")
(mail-fetch-field "From")))
(error "Message is not a digest")))))
(save-excursion
(goto-char (point-max))
(skip-chars-backward " \t\n")
(let ((count 10) found)
;; compensate for broken un*x digestifiers. Sigh Sigh.
(while (and (> count 0) (not found))
(forward-line -1)
(setq count (1- count))
(if (looking-at (concat "End of.*Digest.*\n"
(regexp-quote "*********") "*"
"\\(\n------*\\)*"))
(setq found t)))
(if (not found) (error "Message is not a digest"))))
(re-search-forward (concat "^" (make-string 55 ?-) "-*\n*"))
(replace-match "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
(save-restriction
(narrow-to-region (point)
(progn (search-forward "\n\n")
(point)))
(if (mail-fetch-field "To") nil
(goto-char (point-min))
(insert "To: " digest-name "\n")))
(while (re-search-forward
(concat "\n\n" (make-string 27 ?-) "-*\n*")
nil t)
(replace-match "\n\n\^_\^L\n0, unseen,,\n*** EOOH ***\n")
(save-restriction
(if (looking-at "End ")
(insert "To: " digest-name "\n\n")
(narrow-to-region (point)
(progn (search-forward "\n\n"
nil 'move)
(point))))
(if (mail-fetch-field "To") nil
(goto-char (point-min))
(insert "To: " digest-name "\n"))))))
(setq error nil)
(message "Message successfully undigestified")
(let ((n rmail-current-message))
(rmail-forget-messages)
(rmail-show-message n)
(rmail-delete-forward)))
(cond (error
(narrow-to-region (point-min) (1+ (point-max)))
(delete-region (point-min) (point-max))
(rmail-show-message rmail-current-message))))))
;;; undigest.el ends here
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