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;;; mcs-nemacs.el --- MIME charset implementation for Nemacs
;; Copyright (C) 1995,1996,1997,1998 MORIOKA Tomohiko
;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Keywords: emulation, compatibility, Mule
;; This file is part of APEL (A Portable Emacs 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:
(defvar charsets-mime-charset-alist
'(((ascii) . us-ascii)))
(defvar default-mime-charset 'iso-2022-jp)
(defvar mime-charset-coding-system-alist
'((iso-2022-jp . 2)
(shift_jis . 1)
))
(defsubst lbt-to-string (lbt)
(cdr (assq lbt '((nil . nil)
(CRLF . "\r\n")
(CR . "\r")
(dos . "\r\n")
(mac . "\r"))))
)
(defun mime-charset-to-coding-system (charset)
(if (stringp charset)
(setq charset (intern (downcase charset)))
)
(cdr (assq charset mime-charset-coding-system-alist)))
(defun detect-mime-charset-region (start end)
"Return MIME charset for region between START and END.
\[emu-nemacs.el]"
(if (save-excursion
(save-restriction
(narrow-to-region start end)
(goto-char start)
(re-search-forward "[\200-\377]" nil t)))
default-mime-charset
'us-ascii))
(defun encode-mime-charset-region (start end charset &optional lbt)
"Encode the text between START and END as MIME CHARSET.
\[emu-nemacs.el]"
(let ((cs (mime-charset-to-coding-system charset))
(nl (lbt-to-string lbt)))
(and (numberp cs)
(or (= cs 3)
(save-excursion
(save-restriction
(narrow-to-region start end)
(convert-region-kanji-code start end 3 cs)
(if nl
(progn
(goto-char (point-min))
(while (search-forward "\n" nil t)
(replace-match nl)))
)))
))))
(defun decode-mime-charset-region (start end charset &optional lbt)
"Decode the text between START and END as MIME CHARSET.
\[emu-nemacs.el]"
(let ((cs (mime-charset-to-coding-system charset))
(nl (lbt-to-string lbt)))
(and (numberp cs)
(or (= cs 3)
(save-excursion
(save-restriction
(narrow-to-region start end)
(convert-region-kanji-code start end cs 3)
(if nl
(progn
(goto-char (point-min))
(while (search-forward nl nil t)
(replace-match "\n")))
)))
))))
(defun encode-mime-charset-string (string charset &optional lbt)
"Encode the STRING as MIME CHARSET. [emu-nemacs.el]"
(with-temp-buffer
(insert string)
(encode-mime-charset-region (point-min)(point-max) charset lbt)
(buffer-string)))
(defun decode-mime-charset-string (string charset &optional lbt)
"Decode the STRING as MIME CHARSET. [emu-nemacs.el]"
(with-temp-buffer
(insert string)
(decode-mime-charset-region (point-min)(point-max) charset lbt)
(buffer-string)))
(defun write-region-as-mime-charset (charset start end filename)
"Like `write-region', q.v., but code-convert by MIME CHARSET.
\[emu-nemacs.el]"
(let ((kanji-fileio-code
(or (mime-charset-to-coding-system charset) 0)))
(write-region start end filename)))
;;; @ end
;;;
(require 'product)
(product-provide (provide 'mcs-nemacs) (require 'apel-ver))
;;; mcs-nemacs.el ends here
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