-;;;
-;;; $Id: mel-q.el,v 2.0 1995/09/11 11:33:47 morioka Exp $
-;;;
+;;; mel-q.el: Quoted-Printable and Q-encoding encoder/decoder for GNU Emacs
-;;; @ constants
-;;;
+;; 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.
-(defconst quoted-printable-hex-chars "0123456789ABCDEF")
-(defconst quoted-printable-octet-regexp
- (concat "=[" quoted-printable-hex-chars
- "][" quoted-printable-hex-chars "]"))
+;; 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.
-;;; @ variables
+;;; 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.")
-(defvar quoted-printable-external-decoder '("mmencode" "-q" "-u")
- "*list of quoted-printable decoder 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 10000
+
+(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.")
-(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-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)
+ ))
-;;; @ Quoted-Printable (Q-encode) encoder/decoder
-;;;
-(defun quoted-printable-quote-char (chr)
- (concat "="
- (char-to-string (elt quoted-printable-hex-chars (ash chr -4)))
- (char-to-string (elt quoted-printable-hex-chars (logand chr 15)))
- ))
+(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)
+ ))
-;;; @@ Quoted-Printable encode/decode string
-;;;
+(mel-define-method-function
+ (mime-encode-string string (nil "quoted-printable"))
+ 'quoted-printable-encode-string)
-(defun quoted-printable-encode-string (str)
- (let ((i 0))
- (mapconcat (function
- (lambda (chr)
- (cond ((or (< chr 32) (< 126 chr) (eq chr ?=))
- (if (>= i 73)
- (progn
- (setq i 0)
- (concat "=\n" (quoted-printable-quote-char chr))
- )
- (progn
- (setq i (+ i 3))
- (quoted-printable-quote-char chr)
- )))
- (t (if (>= i 75)
- (progn
- (setq i 0)
- (concat "=\n" (char-to-string chr))
- )
- (progn
- (setq i (1+ i))
- (char-to-string chr)
- )))
- )))
- str "")))
+(mel-define-method-function
+ (mime-encode-region start end (nil "quoted-printable"))
+ 'quoted-printable-encode-region)
-(defun quoted-printable-decode-string (str)
- (let (q h l)
- (mapconcat (function
- (lambda (chr)
- (cond ((eq chr ?=)
- (setq q t)
- "")
- (q (setq h
- (cond ((<= ?a chr) (+ (- chr ?a) 10))
- ((<= ?A chr) (+ (- chr ?A) 10))
- ((<= ?0 chr) (- chr ?0))
- ))
- (setq q nil)
- "")
- (h (setq l (cond ((<= ?a chr) (+ (- chr ?a) 10))
- ((<= ?A chr) (+ (- chr ?A) 10))
- ((<= ?0 chr) (- chr ?0))
- ))
- (prog1
- (char-to-string (logior (ash h 4) l))
- (setq h nil)
- )
- )
- (t (char-to-string chr))
- )))
- str "")))
+(mel-define-method mime-insert-encoded-file (filename
+ (nil "quoted-printable"))
+ "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 encode/decode region
+;;; @ Quoted-Printable decoder
;;;
-(defun quoted-printable-internal-encode-region (beg end)
- (save-excursion
- (save-restriction
- (narrow-to-region beg end)
- (goto-char (point-min))
- (catch 'tag
- (let (b e str)
- (while t
- (beginning-of-line) (setq b (point))
- (end-of-line) (setq e (point))
- (if (< b e)
- (progn
- (setq str (buffer-substring b e))
- (delete-region b e)
- (insert (quoted-printable-encode-string str))
- ))
- (if (eobp)
- (throw 'tag nil)
- )
- (forward-char 1)
- )))
- )))
+(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 (beg end)
+(defun quoted-printable-internal-decode-region (start end)
(save-excursion
(save-restriction
- (narrow-to-region beg end)
+ (narrow-to-region start end)
(goto-char (point-min))
- (while (re-search-forward "=\n" nil t)
- (replace-match "")
- )
- (goto-char (point-min))
- (let (b e str)
- (while (re-search-forward quoted-printable-octet-regexp nil t)
- (setq b (match-beginning 0))
- (setq e (match-end 0))
- (setq str (buffer-substring b e))
- (delete-region b e)
- (insert (quoted-printable-decode-string str))
- ))
- )))
+ (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
+ ))
+ )))))
-(cond ((boundp 'MULE)
- (define-program-coding-system
- nil (car quoted-printable-external-encoder) *noconv*)
- (define-program-coding-system
- nil (car quoted-printable-external-decoder) *noconv*)
- )
- ((boundp 'NEMACS)
- (define-program-kanji-code
- nil (car quoted-printable-external-encoder) 0)
- (define-program-kanji-code
- nil (car quoted-printable-external-decoder) 0)
- ))
-
-(defun quoted-printable-external-encode-region (beg end)
- (save-excursion
- (apply (function call-process-region)
- beg end (car quoted-printable-external-encoder)
- t t nil (cdr quoted-printable-external-encoder))
- ))
+(defvar quoted-printable-external-decoder '("mmencode" "-q" "-u")
+ "*list of quoted-printable decoder program name and its arguments.")
-(defun quoted-printable-external-decode-region (beg end)
+(defun quoted-printable-external-decode-region (start end)
(save-excursion
- (apply (function call-process-region)
- beg end (car quoted-printable-external-decoder)
- t t nil (cdr quoted-printable-external-decoder))
- ))
+ (as-binary-process
+ (apply (function call-process-region)
+ start end (car quoted-printable-external-decoder)
+ t t nil (cdr quoted-printable-external-decoder))
+ )))
-(defun quoted-printable-encode-region (beg end)
- (interactive "r")
- (if (and quoted-printable-internal-encoding-limit
- (> (- end beg) quoted-printable-internal-encoding-limit))
- (quoted-printable-external-encode-region beg end)
- (quoted-printable-internal-encode-region beg end)
- ))
-(defun quoted-printable-decode-region (beg end)
+(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 beg) quoted-printable-internal-decoding-limit))
- (quoted-printable-external-decode-region beg end)
- (quoted-printable-internal-decode-region beg end)
+ (> (- 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)))
+
+
+(mel-define-method-function
+ (mime-decode-string string (nil "quoted-printable"))
+ 'quoted-printable-decode-string)
+
+(mel-define-method-function
+ (mime-decode-region start end (nil "quoted-printable"))
+ 'quoted-printable-decode-region)
+
+
+(defvar quoted-printable-external-decoder-option-to-specify-file '("-o")
+ "*list of options of quoted-printable decoder program to specify file.")
+
+(mel-define-method mime-write-decoded-region (start end filename
+ (nil "quoted-printable"))
+ "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
;;;
-(defun q-encoding-encode-string-for-text (str)
- (mapconcat (function
- (lambda (chr)
- (cond ((eq chr 32) "_")
- ((or (< chr 32) (< 126 chr) (eq chr ?=))
- (quoted-printable-quote-char chr)
- )
- (t (char-to-string chr))
- )))
- str ""))
-
-(defun q-encoding-encode-string-for-comment (str)
- (mapconcat (function
- (lambda (chr)
- (cond ((eq chr 32) "_")
- ((or (< chr 32) (< 126 chr)
- (memq chr '(?= ?\( ?\) ?\\))
- )
- (quoted-printable-quote-char chr)
- )
- (t (char-to-string chr))
- )))
- str ""))
-
-(defun q-encoding-encode-string-for-phrase (str)
- (mapconcat (function
- (lambda (chr)
- (cond ((eq chr 32) "_")
- ((or (and (<= ?A chr)(<= chr ?Z))
- (and (<= ?a chr)(<= chr ?z))
- (and (<= ?0 chr)(<= chr ?9))
- (memq chr '(?! ?* ?+ ?- ?/))
- )
- (char-to-string chr)
- )
- (t (quoted-printable-quote-char chr))
- )))
- str ""))
-
-(defun q-encoding-encode-string (str &optional mode)
- (cond ((eq mode 'text)
- (q-encoding-encode-string-for-text str)
- )
- ((eq mode 'comment)
- (q-encoding-encode-string-for-comment str)
- )
- (t
- (q-encoding-encode-string-for-phrase str)
- )))
-
-(defun q-encoding-decode-string (str)
+(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)
((eq chr ?=)
(setq q t)
"")
- (q (setq h (cond ((<= ?a chr) (+ (- chr ?a) 10))
- ((<= ?A chr) (+ (- chr ?A) 10))
- ((<= ?0 chr) (- chr ?0))
- ))
+ (q (setq h (quoted-printable-hex-char-to-num chr))
(setq q nil)
"")
- (h (setq l (cond ((<= ?a chr) (+ (- chr ?a) 10))
- ((<= ?A chr) (+ (- chr ?A) 10))
- ((<= ?0 chr) (- chr ?0))
- ))
+ (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))
)))
- str "")))
+ string "")))
+(mel-define-method-function (encoded-text-encode-string string (nil "Q"))
+ 'q-encoding-encode-string)
-;;; @@ etc
-;;;
-
-(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 (string-match "[A-Za-z0-9!*+/=_---]" (char-to-string chr))
- (setq l (+ l 1))
- (setq l (+ l 3))
- )
- (setq i (+ i 1)) )
- l))
+(mel-define-method encoded-text-decode-string (string (nil "Q"))
+ (if (and (string-match Q-encoded-text-regexp string)
+ (string= string (match-string 0 string)))
+ (q-encoding-decode-string string)
+ (error "Invalid encoded-text %s" string)))
;;; @ end
;;;
(provide 'mel-q)
+
+;;; mel-q.el ends here
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