+++ /dev/null
-;;; mel-q.el --- Quoted-Printable encoder/decoder.
-
-;; Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
-
-;; Author: MORIOKA Tomohiko <tomo@m17n.org>
-;; Created: 1995/6/25
-;; Keywords: MIME, Quoted-Printable, Q-encoding
-
-;; This file is part of FLIM (Faithful Library about Internet Message).
-
-;; 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 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.
-
-;;; Code:
-
-(require 'mime-def)
-(require 'path-util)
-
-
-;;; @ 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 (goto-char start) end)
- (let ((col 0)
- chr)
- (while (not (eobp))
- (cond
- ((>= col 75) ; soft line break.
- (insert "=\n")
- (setq col 0))
- ((eolp) ; end of line.
- (forward-char)
- (setq col 0))
- (t
- (setq chr (char-after (point)))
- (cond
- ((and (memq chr '(? ?\t)) ; encode WSP char before CRLF.
- (eq (char-after (1+ (point))) ?\n))
- (forward-char)
- (insert "=\n")
- (forward-char)
- (setq col 0))
- ((and (bolp) ; "^From " is not safe.
- (eq chr ?F)
- (eq (char-after (1+ (point))) ?r)
- (eq (char-after (+ 2 (point))) ?o)
- (eq (char-after (+ 3 (point))) ?m)
- (eq (char-after (+ 4 (point))) ? ))
- (delete-region (point)(1+ (point)))
- (insert "=46") ; moved to ?r.
- (forward-char 4) ; skip "rom ".
- (setq col 7))
- ((or (= chr ?\t) ; skip safe char.
- (and (<= 32 chr)(/= chr ?=)(< chr 127)))
- (forward-char)
- (setq col (1+ col)))
- ((>= col 73) ; soft line break.
- (insert "=\n")
- (setq col 0))
- (t ; encode unsafe char.
- (delete-region (point)(1+ (point)))
- ;; (insert (quoted-printable-quote-char chr))
- (insert
- ?=
- (aref quoted-printable-hex-chars (ash chr -4))
- (aref quoted-printable-hex-chars (logand chr 15)))
- (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
- ;; XXX: Fix this message, or simply remove it.
- ;; (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)))
-
-
-(mel-define-method-function
- (mime-encode-string string (nil "quoted-printable"))
- 'quoted-printable-encode-string)
-
-(mel-define-method-function
- (mime-encode-region start end (nil "quoted-printable"))
- 'quoted-printable-encode-region)
-
-(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 "*fInsert 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)
- (cond
- ((eolp)
- ;; unfold soft line break.
- (delete-region (1- (point))(1+ (point))))
- ((and (memq (char-after (point))
- (eval-when-compile
- ;; XXX: should provide char-list instead.
- (string-to-char-list quoted-printable-hex-chars)))
- (memq (char-after (1+ (point)))
- (eval-when-compile
- ;; XXX: should provide char-list instead.
- (string-to-char-list quoted-printable-hex-chars))))
- ;; encoded char.
- (insert
- (prog1
- (logior
- (ash (quoted-printable-hex-char-to-num (char-after (point))) 4)
- (quoted-printable-hex-char-to-num (char-after (1+ (point)))))
- (delete-region (1- (point))(+ 2 (point))))))
- (t
- ;; invalid encoding.
- ))))))
-
-(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)))
-
-
-(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 "*r\nFWrite 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 "")))
-
-(mel-define-method-function (encoded-text-encode-string string (nil "Q"))
- 'q-encoding-encode-string)
-
-(mel-define-method encoded-text-decode-string (string (nil "Q"))
- (if (string-match (eval-when-compile
- (concat "\\`" Q-encoded-text-regexp "\\'"))
- 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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