+++ /dev/null
-;;; mel-q.el: Quoted-Printable and Q-encoding encoder/decoder for GNU Emacs
-
-;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
-
-;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
-;; Created: 1995/6/25
-;; Keywords: MIME, Quoted-Printable, Q-encoding
-
-;; This file is part of MEL (MIME Encoding Library).
-
-;; 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.
-
-;; 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.
-
-;; 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.
-
-;;; Code:
-
-(require 'emu)
-(require 'mime-def)
-
-
-;;; @ Quoted-Printable encoder
-;;;
-
-(defsubst quoted-printable-quote-char (character)
- (concat
- "="
- (char-to-string (aref quoted-printable-hex-chars (ash character -4)))
- (char-to-string (aref quoted-printable-hex-chars (logand character 15)))
- ))
-
-(defun quoted-printable-internal-encode-region (start end)
- (save-excursion
- (save-restriction
- (narrow-to-region start end)
- (goto-char start)
- (let ((col 0))
- (while (< (point)(point-max))
- (cond ((>= col 75)
- (insert "=\n")
- (setq col 0)
- )
- ((looking-at-as-unibyte "^From ")
- (replace-match "=46rom ")
- (backward-char 1)
- (setq col (+ col 6))
- )
- ((looking-at-as-unibyte "[ \t]\n")
- (forward-char 1)
- (insert "=\n")
- (forward-char 1)
- (setq col 0)
- )
- (t
- (let ((chr (char-after (point))))
- (cond ((= chr ?\n)
- (forward-char 1)
- (setq col 0)
- )
- ((or (= chr ?\t)
- (and (<= 32 chr)(/= chr ?=)(< chr 127))
- )
- (forward-char 1)
- (setq col (1+ col))
- )
- ((>= col 73)
- (insert "=\n")
- (setq col 0)
- )
- (t
- (delete-char 1)
- (insert (quoted-printable-quote-char chr))
- (setq col (+ col 3))
- ))
- )))
- )))))
-
-
-(defvar quoted-printable-external-encoder '("mmencode" "-q")
- "*list of quoted-printable encoder program name and its arguments.")
-
-(defun quoted-printable-external-encode-region (start end)
- (save-excursion
- (save-restriction
- (narrow-to-region start end)
- (as-binary-process
- (apply (function call-process-region)
- start end (car quoted-printable-external-encoder)
- t t nil (cdr quoted-printable-external-encoder))
- )
- ;; for OS/2
- ;; regularize line break code
- (goto-char (point-min))
- (while (re-search-forward "\r$" nil t)
- (replace-match "")
- )
- )))
-
-
-(defvar quoted-printable-internal-encoding-limit
- (if (and (featurep 'xemacs)(featurep 'mule))
- 0
- (require 'path-util)
- (if (exec-installed-p "mmencode")
- 1000
- (message "Don't found external encoder for Quoted-Printable!")
- nil))
- "*limit size to use internal quoted-printable encoder.
-If size of input to encode is larger than this limit,
-external encoder is called.")
-
-(defun quoted-printable-encode-region (start end)
- "Encode current region by quoted-printable.
-START and END are buffer positions.
-This function calls internal quoted-printable encoder if size of
-region is smaller than `quoted-printable-internal-encoding-limit',
-otherwise it calls external quoted-printable encoder specified by
-`quoted-printable-external-encoder'. In this case, you must install
-the program (maybe mmencode included in metamail or XEmacs package)."
- (interactive "r")
- (if (and quoted-printable-internal-encoding-limit
- (> (- end start) quoted-printable-internal-encoding-limit))
- (quoted-printable-external-encode-region start end)
- (quoted-printable-internal-encode-region start end)
- ))
-
-
-(defun quoted-printable-encode-string (string)
- "Encode STRING to quoted-printable, and return the result."
- (with-temp-buffer
- (insert string)
- (quoted-printable-encode-region (point-min)(point-max))
- (buffer-string)
- ))
-
-
-(defun quoted-printable-insert-encoded-file (filename)
- "Encode contents of file FILENAME to quoted-printable, and insert the result.
-It calls external quoted-printable encoder specified by
-`quoted-printable-external-encoder'. So you must install the program
-\(maybe mmencode included in metamail or XEmacs package)."
- (interactive (list (read-file-name "Insert encoded file: ")))
- (apply (function call-process) (car quoted-printable-external-encoder)
- filename t nil (cdr quoted-printable-external-encoder))
- )
-
-
-;;; @ Quoted-Printable decoder
-;;;
-
-(defsubst quoted-printable-hex-char-to-num (chr)
- (cond ((<= ?a chr) (+ (- chr ?a) 10))
- ((<= ?A chr) (+ (- chr ?A) 10))
- ((<= ?0 chr) (- chr ?0))
- ))
-
-(defun quoted-printable-internal-decode-region (start end)
- (save-excursion
- (save-restriction
- (narrow-to-region start end)
- (goto-char (point-min))
- (while (search-forward "=" nil t)
- (let ((beg (match-beginning 0)))
- (cond ((looking-at "\n")
- (delete-region beg (match-end 0))
- )
- ((looking-at
- `,(concat "[" quoted-printable-hex-chars
- "][" quoted-printable-hex-chars "]"))
- (let* ((end (match-end 0))
- (hex (buffer-substring (match-beginning 0) end)))
- (delete-region beg end)
- (insert
- (logior
- (ash (quoted-printable-hex-char-to-num (aref hex 0)) 4)
- (quoted-printable-hex-char-to-num (aref hex 1))))
- ))
- (t
- ;; invalid
- ))
- )))))
-
-(defvar quoted-printable-external-decoder '("mmencode" "-q" "-u")
- "*list of quoted-printable decoder program name and its arguments.")
-
-(defun quoted-printable-external-decode-region (start end)
- (save-excursion
- (as-binary-process
- (apply (function call-process-region)
- start end (car quoted-printable-external-decoder)
- t t nil (cdr quoted-printable-external-decoder))
- )))
-
-
-(defvar quoted-printable-internal-decoding-limit nil
- "*limit size to use internal quoted-printable decoder.
-If size of input to decode is larger than this limit,
-external decoder is called.")
-
-(defun quoted-printable-decode-region (start end)
- "Decode current region by quoted-printable.
-START and END are buffer positions.
-This function calls internal quoted-printable decoder if size of
-region is smaller than `quoted-printable-internal-decoding-limit',
-otherwise it calls external quoted-printable decoder specified by
-`quoted-printable-external-decoder'. In this case, you must install
-the program (maybe mmencode included in metamail or XEmacs package)."
- (interactive "r")
- (if (and quoted-printable-internal-decoding-limit
- (> (- end start) quoted-printable-internal-decoding-limit))
- (quoted-printable-external-decode-region start end)
- (quoted-printable-internal-decode-region start end)
- ))
-
-(defun quoted-printable-decode-string (string)
- "Decode STRING which is encoded in quoted-printable, and return the result."
- (with-temp-buffer
- (insert string)
- (quoted-printable-decode-region (point-min)(point-max))
- (buffer-string)))
-
-
-(defvar quoted-printable-external-decoder-option-to-specify-file '("-o")
- "*list of options of quoted-printable decoder program to specify file.")
-
-(defun quoted-printable-write-decoded-region (start end filename)
- "Decode and write current region encoded by quoted-printable into FILENAME.
-START and END are buffer positions."
- (interactive
- (list (region-beginning) (region-end)
- (read-file-name "Write decoded region to file: ")))
- (as-binary-process
- (apply (function call-process-region)
- start end (car quoted-printable-external-decoder)
- nil nil nil
- (append (cdr quoted-printable-external-decoder)
- quoted-printable-external-decoder-option-to-specify-file
- (list filename))
- )))
-
-\f
-;;; @ Q-encoding encode/decode string
-;;;
-
-(defconst q-encoding-special-chars-alist
- '((text ?= ?? ?_)
- (comment ?= ?? ?_ ?\( ?\) ?\\)
- (phrase ?= ?? ?_ ?\( ?\) ?\\ ?\" ?# ?$ ?% ?& ?' ?, ?. ?/
- ?: ?\; ?< ?> ?@ ?\[ ?\] ?^ ?` ?{ ?| ?} ?~)
- ))
-
-(defun q-encoding-encode-string (string &optional mode)
- "Encode STRING to Q-encoding of encoded-word, and return the result.
-MODE allows `text', `comment', `phrase' or nil. Default value is
-`phrase'."
- (let ((specials (cdr (or (assq mode q-encoding-special-chars-alist)
- (assq 'phrase q-encoding-special-chars-alist)
- ))))
- (mapconcat (function
- (lambda (chr)
- (cond ((eq chr ? ) "_")
- ((or (< chr 32) (< 126 chr)
- (memq chr specials)
- )
- (quoted-printable-quote-char chr)
- )
- (t
- (char-to-string chr)
- ))
- ))
- string "")
- ))
-
-(defun q-encoding-decode-string (string)
- "Decode STRING which is encoded in Q-encoding and return the result."
- (let (q h l)
- (mapconcat (function
- (lambda (chr)
- (cond ((eq chr ?_) " ")
- ((eq chr ?=)
- (setq q t)
- "")
- (q (setq h (quoted-printable-hex-char-to-num chr))
- (setq q nil)
- "")
- (h (setq l (quoted-printable-hex-char-to-num chr))
- (prog1
- (char-to-string (logior (ash h 4) l))
- (setq h nil)
- )
- )
- (t (char-to-string chr))
- )))
- string "")))
-
-
-;;; @@ etc
-;;;
-
-(defun q-encoding-printable-char-p (chr mode)
- (and (not (memq chr '(?= ?? ?_)))
- (<= ?\ chr)(<= chr ?~)
- (cond ((eq mode 'text) t)
- ((eq mode 'comment)
- (not (memq chr '(?\( ?\) ?\\)))
- )
- (t
- (string-match "[A-Za-z0-9!*+/=_---]" (char-to-string chr))
- ))))
-
-(defun q-encoding-encoded-length (string &optional mode)
- (let ((l 0)(i 0)(len (length string)) chr)
- (while (< i len)
- (setq chr (elt string i))
- (if (q-encoding-printable-char-p chr mode)
- (setq l (+ l 1))
- (setq l (+ l 3))
- )
- (setq i (+ i 1)) )
- l))
-
-
-;;; @ end
-;;;
-
-(provide 'mel-q)
-
-;;; mel-q.el ends here
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