;;; pure-cs-mule2.el --- Mule2.* specific code for PURE coding-system module

;; Copyright (C) 2000 by Project Pure.

;; Author: SHIMADA Mitsunobu <simm@irc.fan.gr.jp>
;; Keywords: PURE, coding-system, Mule2.*

;; $Id: pure-cs-mule2.el,v 1.5 2001/06/05 16:34:17 simm Exp $

;; This file 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 file 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.

;;; Commentary:

;; PURE means "Primitive Universal Relay-chat Environment"
;; CS means coding-system
;; This module is derived from irchat-pj-specific-mule2.el

;;; Code:

(defvar pure-cs-enable-mbchars (featurep 'mule)
  "Multibyte characters availability flag.
If non-nil, multibyte characters are available.")

(defvar pure-cs-mule2-alist
  '((iso-2022-7bit-ss2 . *iso-2022-ss2-7*)
    (iso-2022-jp       . *iso-2022-jp*)
    (iso-2022-jproxy   . *iso-2022-jproxy*)
    (euc-jp            . *euc-japan*)
    (euc-japan         . *euc-japan*)
    (sjis              . *sjis*)
    (shift-jis         . *sjis*)
    (shift_jis         . *sjis*)
    (ctext             . *ctext*)
    (x-ctext           . *x-ctext*)
    (no-conversion     . *noconv*))
  "Table of coding system.
Each car is Emacs20-expression, cdr is Mule2.*-expression.")

(defsubst pure-cs-set-service (service in out)
  (define-service-coding-system service nil (cons in out)))
(defsubst pure-cs-set-process (process in out)
  (set-process-coding-system process in out))

(defsubst pure-cs-set-noconv-service (service)
  (pure-cs-set-service service *noconv* *noconv*))
(defsubst pure-cs-set-noconv-process (process)
  (pure-cs-set-process process *noconv* *noconv*))

(defun pure-cs-decode-region (beg end code)
  "Decode the current region by specified coding system.
This function emulates `decode-coding-region' on GNU Emacs 20.*"
  (code-convert-region beg end (cdr (assq code pure-cs-mule2-alist)) *internal*))

(defun pure-cs-encode-region (beg end code)
  "Encode the current region by specified coding system.
This function emulates `encode-coding-region' on GNU Emacs 20.*"
  (code-convert-region beg end *internal* (cdr (assq code pure-cs-mule2-alist))))
  
(defun pure-cs-decode-string (str code)
  "Decode the current string by specified coding system.
This function emulates `decode-coding-string' on GNU Emacs 20.*"
  (code-convert-string str (cdr (assq code pure-cs-mule2-alist)) *internal*))

(defun pure-cs-encode-string (str code)
  "Encode the current string by specified coding system.
This function emulates `encode-coding-string' on GNU Emacs 20.*"
  (code-convert-string str *internal* (cdr (assq code pure-cs-mule2-alist))))

;;; That's all
(provide 'pure-cs-mule2)

;;; pure-cs-mule2.el ends here