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;;; chinese.el --- support for Chinese -*- coding: iso-2022-7bit; -*-
;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
;; Licensed to the Free Software Foundation.
;; Keywords: multilingual, Chinese
;; 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 Chinese, three character sets GB2312, BIG5, and CNS11643 are
;; supported.
;;; Code:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Chinese (general)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(make-coding-system
'iso-2022-cn 2 ?C
"ISO 2022 based 7bit encoding for Chinese GB and CNS (MIME:ISO-2022-CN)"
'(ascii
(nil chinese-gb2312 chinese-cns11643-1)
(nil chinese-cns11643-2)
nil
nil ascii-eol ascii-cntl seven locking-shift single-shift nil nil nil
init-bol)
'((safe-charsets ascii chinese-gb2312 chinese-cns11643-1 chinese-cns11643-2)
(mime-charset . iso-2022-cn)))
(define-coding-system-alias 'chinese-iso-7bit 'iso-2022-cn)
(make-coding-system
'iso-2022-cn-ext 2 ?C
"ISO 2022 based 7bit encoding for Chinese GB and CNS (MIME:ISO-2022-CN-EXT)"
'(ascii
(nil chinese-gb2312 chinese-cns11643-1)
(nil chinese-cns11643-2)
(nil chinese-cns11643-3 chinese-cns11643-4 chinese-cns11643-5
chinese-cns11643-6 chinese-cns11643-7)
nil ascii-eol ascii-cntl seven locking-shift single-shift nil nil nil
init-bol)
'((safe-charsets ascii chinese-gb2312 chinese-cns11643-1 chinese-cns11643-2
chinese-cns11643-3 chinese-cns11643-4 chinese-cns11643-5
chinese-cns11643-6 chinese-cns11643-7)
(mime-charset . iso-2022-cn-ext)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Chinese GB2312 (simplified)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(make-coding-system
'chinese-iso-8bit 2 ?c
"ISO 2022 based EUC encoding for Chinese GB2312 (MIME:GB2312)"
'(ascii chinese-gb2312 nil nil
nil ascii-eol ascii-cntl nil nil nil nil)
'((safe-charsets ascii chinese-gb2312)
(mime-charset . gb2312)))
(define-coding-system-alias 'cn-gb-2312 'chinese-iso-8bit)
(define-coding-system-alias 'euc-china 'chinese-iso-8bit)
(define-coding-system-alias 'euc-cn 'chinese-iso-8bit)
(define-coding-system-alias 'cn-gb 'chinese-iso-8bit)
(define-coding-system-alias 'gb2312 'chinese-iso-8bit)
(make-coding-system
'chinese-hz 0 ?z
"Hz/ZW 7-bit encoding for Chinese GB2312 (MIME:HZ-GB-2312)"
nil
'((safe-charsets ascii chinese-gb2312)
(mime-charset . hz-gb-2312)
(post-read-conversion . post-read-decode-hz)
(pre-write-conversion . pre-write-encode-hz)))
(define-coding-system-alias 'hz-gb-2312 'chinese-hz)
(define-coding-system-alias 'hz 'chinese-hz)
(defun post-read-decode-hz (len)
(let ((pos (point))
(buffer-modified-p (buffer-modified-p))
last-coding-system-used)
(prog1
(decode-hz-region pos (+ pos len))
(set-buffer-modified-p buffer-modified-p))))
(defun pre-write-encode-hz (from to)
(let ((buf (current-buffer)))
(set-buffer (generate-new-buffer " *temp*"))
(if (stringp from)
(insert from)
(insert-buffer-substring buf from to))
(let (last-coding-system-used)
(encode-hz-region 1 (point-max)))
nil))
(set-language-info-alist
"Chinese-GB" '((charset chinese-gb2312 chinese-sisheng)
(coding-system chinese-iso-8bit iso-2022-cn chinese-hz)
(coding-priority chinese-iso-8bit chinese-big5 iso-2022-cn)
(input-method . "chinese-py-punct")
(features china-util)
(sample-text . "Chinese ($AVPND(B,$AFUM(;0(B,$A::So(B) $ADc:C(B")
(documentation . "Support for Chinese GB2312 character set."))
'("Chinese"))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Chinese BIG5 (traditional)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(make-coding-system
'chinese-big5 3 ?B "BIG5 8-bit encoding for Chinese (MIME:Big5)"
nil
'((safe-charsets ascii chinese-big5-1 chinese-big5-2)
(mime-charset . big5)
(charset-origin-alist (chinese-big5-1 "BIG5" encode-big5-char)
(chinese-big5-2 "BIG5" encode-big5-char))))
(define-coding-system-alias 'big5 'chinese-big5)
(define-coding-system-alias 'cn-big5 'chinese-big5)
;; Big5 font requires special encoding.
(define-ccl-program ccl-encode-big5-font
`(0
;; In: R0:chinese-big5-1 or chinese-big5-2
;; R1:position code 1
;; R2:position code 2
;; Out: R1:font code point 1
;; R2:font code point 2
((r2 = ((((r1 - ?\x21) * 94) + r2) - ?\x21))
(if (r0 == ,(charset-id 'chinese-big5-2)) (r2 += 6280))
(r1 = ((r2 / 157) + ?\xA1))
(r2 %= 157)
(if (r2 < ?\x3F) (r2 += ?\x40) (r2 += ?\x62))))
"CCL program to encode a Big5 code to code point of Big5 font.")
(setq font-ccl-encoder-alist
(cons (cons "big5" ccl-encode-big5-font) font-ccl-encoder-alist))
(set-language-info-alist
"Chinese-BIG5" '((charset chinese-big5-1 chinese-big5-2)
(coding-system chinese-big5 chinese-iso-7bit)
(coding-priority chinese-big5 iso-2022-cn chinese-iso-8bit)
(input-method . "chinese-py-punct-b5")
(features china-util)
(sample-text . "Cantonese ($(0GnM$(B,$(0N]0*Hd(B) $(0*/=((B, $(0+$)p(B")
(documentation . "Support for Chinese Big5 character set."))
'("Chinese"))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Chinese CNS11643 (traditional)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(set-language-info-alist
"Chinese-CNS" '((charset chinese-cns11643-1 chinese-cns11643-2
chinese-cns11643-3 chinese-cns11643-4
chinese-cns11643-5 chinese-cns11643-6
chinese-cns11643-7)
(coding-system iso-2022-cn)
(coding-priority iso-2022-cn chinese-big5 chinese-iso-8bit)
(features china-util)
(input-method . "chinese-cns-quick")
(documentation . "Support for Chinese CNS character sets."))
'("Chinese"))
(provide 'chinese)
;;; chinese.el ends here
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