;;; vietnamese.el --- support for Vietnamese -*- coding: iso-2022-7bit; -*-

;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
;;   Licensed to the Free Software Foundation.
;; Copyright (C) 2002 Free Software Foundation, Inc.
;; Copyright (C) 2003
;;   National Institute of Advanced Industrial Science and Technology (AIST)
;;   Registration Number H13PRO009

;; Keywords: multilingual, Vietnamese, i18n

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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:

;; For Vietnames, the character sets VISCII, VSCII and TCVN-5712 are
;; supported.

;;; Code:

(define-coding-system 'vietnamese-viscii
  "8-bit encoding for Vietnamese VISCII 1.1 (MIME:VISCII)."
  :coding-type 'charset
  :mnemonic ?V
  :charset-list '(viscii)
  :mime-charset 'viscii)

(define-coding-system-alias 'viscii 'vietnamese-viscii)

(define-coding-system 'vietnamese-vscii
  "8-bit encoding for Vietnamese VSCII-1."
  :coding-type 'charset
  :mnemonic ?v
  :charset-list '(vscii))

(define-coding-system-alias 'vscii 'vietnamese-vscii)

;; (make-coding-system
;;  'vietnamese-vps 4 ?p
;;  "8-bit encoding for Vietnamese VPS"
;;  '(ccl-decode-vps . ccl-encode-vps)
;;  '((safe-charsets ascii vietnamese-viscii-lower vietnamese-viscii-upper)
;;    (valid-codes (0 . 255))))
;;
;; (define-coding-system-alias 'vps 'vietnamese-vps)

(define-coding-system 'vietnamese-viqr
  "Vietnamese latin transcription (VIQR)."
  :coding-type 'utf-8
  :mnemonic ?q
  :charset-list '(ascii viscii)
  :post-read-conversion 'viqr-post-read-conversion
  :pre-write-conversion 'viqr-pre-write-conversion)

(define-coding-system-alias 'viqr 'vietnamese-viqr)

(set-language-info-alist
 "Vietnamese" `((charset viscii)
		(coding-system vietnamese-viscii vietnamese-vscii
			        vietnamese-tcvn vietnamese-viqr windows-1258)
		(nonascii-translation . viscii)
		(coding-priority vietnamese-viscii)
		(input-method . "vietnamese-viqr")
		(unibyte-display . vietnamese-viscii)
		(features viet-util)
		(sample-text . "Vietnamese (Ti,1*(Bng Vi,1.(Bt)	Ch,1`(Bo b,1U(Bn")
		(documentation . "\
For Vietnamese, Emacs uses special charsets internally.
They can be decoded from and encoded to VISCII, VSCII, TCVN-5712, VIQR
and windows-1258.  VSCII is deprecated in favour of TCVN-5712.  The
Current setting gives higher priority to the coding system VISCII than
TCVN-5712.  If you prefer TCVN-5712, please do: (prefer-coding-system
'vietnamese-tcvn).  There are two Vietnamese input methods: VIQR and
Telex, VIQR is the default setting.")))

(define-coding-system 'windows-1258
  "windows-1258 encoding for Vietnamese (MIME: WINDOWS-1258)"
  :coding-type 'charset
  :mnemonic ?*
  :charset-list '(windows-1258)
  :mime-charset 'windows-1258)
(define-coding-system-alias 'cp1258 'windows-1258)

(define-coding-system 'vietnamese-tcvn
  "8-bit encoding for Vietnamese TCVN-5712"
  :coding-type 'charset
  :mnemonic ?t
  :charset-list '(tcvn-5712))
(define-coding-system-alias 'tcvn 'vietnamese-tcvn)

(provide 'vietnamese)

;;; arch-tag: 5bd4f1aa-2d4e-4f33-b7d8-0679c6a19ee6
;;; vietnamese.el ends here