[bpt/emacs.git] / lisp / language / chinese.el

;;; chinese.el --- support for Chinese -*- coding: iso-2022-7bit; -*-

;; Copyright (C) 2001, 2003  Free Software Foundation, Inc.
;; Copyright (C) 1995, 1997, 1998
;;   National Institute of Advanced Industrial Science and Technology (AIST)
;;   Registration Number H14PRO021

;; 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)))

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; 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)
(define-coding-system-alias 'cp936 '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 (\e$AVPND\e(B,\e$AFUM(;0\e(B,\e$A::So\e(B)	\e$ADc:C\e(B")
		(documentation . "Support for Chinese GB2312 character set.")
		(tutorial . "TUTORIAL.cn"))
 '("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)
(define-coding-system-alias 'cp950 '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 (\e$(0GnM$\e(B,\e$(0N]0*Hd\e(B)	\e$(0*/=(\e(B, \e$(0+$)p\e(B")
		  (documentation . "Support for Chinese Big5 character set.")
		  (tutorial . "TUTORIAL.zh"))
 '("Chinese"))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Chinese CNS11643 (traditional)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defvar big5-to-cns (make-translation-table)
  "Translation table for encoding to `euc-tw'.")
;; Could have been done by china-util loaded before.
(unless (get 'big5-to-cns 'translation-table)
  (define-translation-table 'big5-to-cns big5-to-cns))

(define-ccl-program ccl-decode-euc-tw
  ;; CNS plane 1 needs either two or four bytes in EUC-TW encoding;
  ;; CNS planes 2 to 7 always need four bytes.  In internal encoding of
  ;; Emacs, CNS planes 1 and 2 need three bytes, and planes 3 to 7 need
  ;; four bytes.  Thus a buffer magnification value of 2 (for both
  ;; encoding and decoding) is sufficient.
  `(2
    ;; we don't have enough registers to hold all charset-ids
    ((r4 = ,(charset-id 'chinese-cns11643-1))
     (r5 = ,(charset-id 'chinese-cns11643-2))
     (r6 = ,(charset-id 'chinese-cns11643-3))
     (loop
      (read-if (r0 < #x80)
	  ;; ASCII
	  (write-repeat r0)
	;; not ASCII
	(if (r0 == #x8E)
	    ;; single shift
	    (read-if (r1 < #xA1)
		;; invalid byte
		((write r0)
		 (write-repeat r1))
	      (if (r1 > #xA7)
		  ;; invalid plane
		  ((write r0)
		   (write-repeat r1))
		;; OK, we have a plane
		(read-if (r2 < #xA1)
		    ;; invalid first byte
		    ((write r0 r1)
		     (write-repeat r2))
		  (read-if (r3 < #xA1)
		      ;; invalid second byte
		      ((write r0 r1 r2)
		       (write-repeat r3))
		    ;; CNS 1-7, finally
		    ((branch (r1 - #xA1)
		      (r1 = r4)
		      (r1 = r5)
		      (r1 = r6)
		      (r1 = ,(charset-id 'chinese-cns11643-4))
		      (r1 = ,(charset-id 'chinese-cns11643-5))
		      (r1 = ,(charset-id 'chinese-cns11643-6))
		      (r1 = ,(charset-id 'chinese-cns11643-7)))
		     (r2 = ((((r2 - #x80) << 7) + r3) - #x80))
		     (write-multibyte-character r1 r2)
		     (repeat))))))
	  ;; standard EUC
	  (if (r0 < #xA1)
	      ;; invalid first byte
	      (write-repeat r0)
	    (read-if (r1 < #xA1)
		;; invalid second byte
		((write r0)
		 (write-repeat r1))
	      ;; CNS 1, finally
	      ((r1 = ((((r0 - #x80) << 7) + r1) - #x80))
	       (write-multibyte-character r4 r1)
	       (repeat)))))))))
  "CCL program to decode EUC-TW encoding."
)

(define-ccl-program ccl-encode-euc-tw
  `(2
    ;; we don't have enough registers to hold all charset-ids
    ((r2 = ,(charset-id 'ascii))
     (r3 = ,(charset-id 'chinese-big5-1))
     (r4 = ,(charset-id 'chinese-big5-2))
     (r5 = ,(charset-id 'chinese-cns11643-1))
     (r6 = ,(charset-id 'chinese-cns11643-2))
     (loop
      (read-multibyte-character r0 r1)
      (if (r0 == r2)
	  (write-repeat r1)
	(;; Big 5 encoded characters are first translated to CNS
	 (if (r0 == r3)
	     (translate-character big5-to-cns r0 r1)
	   (if (r0 == r4)
	       (translate-character big5-to-cns r0 r1)))
	 (if (r0 == r5)
	     (r0 = #xA1)
	   (if (r0 == r6)
	       (r0 = #xA2)
	     (if (r0 == ,(charset-id 'chinese-cns11643-3))
		 (r0 = #xA3)
	       (if (r0 == ,(charset-id 'chinese-cns11643-4))
		   (r0 = #xA4)
		 (if (r0 == ,(charset-id 'chinese-cns11643-5))
		     (r0 = #xA5)
		   (if (r0 == ,(charset-id 'chinese-cns11643-6))
		       (r0 = #xA6)
		     (if (r0 == ,(charset-id 'chinese-cns11643-7))
			 (r0 = #xA7)
		       ;; not CNS.  We use a dummy character which
		       ;; can't occur in EUC-TW encoding to indicate
		       ;; this.
		       (write-repeat #xFF))))))))))
      (if (r0 != #xA1)
	  ;; single shift and CNS plane
	  ((write #x8E)
	   (write r0)))
      (write ((r1 >> 7) + #x80))
      (write ((r1 % #x80) + #x80))
      (repeat))))
  "CCL program to encode EUC-TW encoding."
)

(defun euc-tw-pre-write-conversion (beg end)
  "Semi-dummy pre-write function effectively to autoload china-util."
  ;; Ensure translation table is loaded.
  (require 'china-util)
  ;; Don't do this again.
  (coding-system-put 'euc-tw 'pre-write-conversion nil)
  nil)

(make-coding-system
  'euc-tw 4 ?Z
  "ISO 2022 based EUC encoding for Chinese CNS11643.
Big5 encoding is accepted for input also (which is then converted to CNS)."
  '(ccl-decode-euc-tw . ccl-encode-euc-tw)
  '((safe-charsets ascii
		   chinese-big5-1
		   chinese-big5-2
		   chinese-cns11643-1
		   chinese-cns11643-2
		   chinese-cns11643-3
		   chinese-cns11643-4
		   chinese-cns11643-5
		   chinese-cns11643-6
		   chinese-cns11643-7)
    (valid-codes (0 . 255))
    (pre-write-conversion . euc-tw-pre-write-conversion)))

(define-coding-system-alias 'euc-taiwan 'euc-tw)

(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 euc-tw)
		 (coding-priority iso-2022-cn euc-tw chinese-big5
				  chinese-iso-8bit)
		 (features china-util)
		 (input-method . "chinese-cns-quick")
		 (documentation . "\
Support for Chinese CNS character sets.  Note that the EUC-TW coding system
accepts Big5 for input also (which is then converted to CNS)."))
 '("Chinese"))

(set-language-info-alist
 "Chinese-EUC-TW" '((charset chinese-cns11643-1 chinese-cns11643-2
			     chinese-cns11643-3 chinese-cns11643-4
			     chinese-cns11643-5 chinese-cns11643-6
			     chinese-cns11643-7 chinese-big5-1 chinese-big5-2)
		    (coding-system euc-tw iso-2022-cn)
		    (coding-priority euc-tw chinese-big5 iso-2022-cn
				     chinese-iso-8bit)
		    (features china-util)
		    (input-method . "chinese-cns-quick")
		    (documentation . "\
Support for Chinese, prefering the EUC-TW character set.  Note that
the EUC-TW coding system accepts Big5 for input also (which is then
converted to CNS)."))
 '("Chinese"))

(provide 'chinese)

;;; arch-tag: b82fcf7a-84f6-4e0b-b38c-1742dac0e09f
;;; chinese.el ends here
Commit	Line	Data
60370d40	1	;;; chinese.el --- support for Chinese -- coding: iso-2022-7bit; --
4ed46869	2
eaa61218 KH	3	;; Copyright (C) 2001, 2003 Free Software Foundation, Inc.
	4	;; Copyright (C) 1995, 1997, 1998
	5	;; National Institute of Advanced Industrial Science and Technology (AIST)
	6	;; Registration Number H14PRO021
4ed46869 KH	7
	8	;; Keywords: multilingual, Chinese
	9
	10	;; This file is part of GNU Emacs.
	11
	12	;; GNU Emacs is free software; you can redistribute it and/or modify
	13	;; it under the terms of the GNU General Public License as published by
	14	;; the Free Software Foundation; either version 2, or (at your option)
	15	;; any later version.
	16
	17	;; GNU Emacs is distributed in the hope that it will be useful,
	18	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	;; GNU General Public License for more details.
	21
	22	;; You should have received a copy of the GNU General Public License
369314dc KH	23	;; along with GNU Emacs; see the file COPYING. If not, write to the
	24	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	25	;; Boston, MA 02111-1307, USA.
4ed46869 KH	26
	27	;;; Commentary:
	28
	29	;; For Chinese, three character sets GB2312, BIG5, and CNS11643 are
	30	;; supported.
	31
	32	;;; Code:
	33
	34	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	35	;;; Chinese (general)
	36	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	37
	38	(make-coding-system
4138c943	39	'iso-2022-cn 2 ?C
285aac85	40	"ISO 2022 based 7bit encoding for Chinese GB and CNS (MIME:ISO-2022-CN)."
4138c943 KH	41	'(ascii
	42	(nil chinese-gb2312 chinese-cns11643-1)
	43	(nil chinese-cns11643-2)
	44	nil
	45	nil ascii-eol ascii-cntl seven locking-shift single-shift nil nil nil
	46	init-bol)
	47	'((safe-charsets ascii chinese-gb2312 chinese-cns11643-1 chinese-cns11643-2)
	48	(mime-charset . iso-2022-cn)))
	49
	50	(define-coding-system-alias 'chinese-iso-7bit 'iso-2022-cn)
	51
	52	(make-coding-system
	53	'iso-2022-cn-ext 2 ?C
285aac85	54	"ISO 2022 based 7bit encoding for Chinese GB and CNS (MIME:ISO-2022-CN-EXT)."
4ed46869 KH	55	'(ascii
	56	(nil chinese-gb2312 chinese-cns11643-1)
	57	(nil chinese-cns11643-2)
	58	(nil chinese-cns11643-3 chinese-cns11643-4 chinese-cns11643-5
	59	chinese-cns11643-6 chinese-cns11643-7)
f3f18123	60	nil ascii-eol ascii-cntl seven locking-shift single-shift nil nil nil
a18aa841	61	init-bol)
4138c943 KH	62	'((safe-charsets ascii chinese-gb2312 chinese-cns11643-1 chinese-cns11643-2
	63	chinese-cns11643-3 chinese-cns11643-4 chinese-cns11643-5
	64	chinese-cns11643-6 chinese-cns11643-7)
	65	(mime-charset . iso-2022-cn-ext)))
	66
335a7ad7	67	\f
4ed46869	68	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
a1506d29	69	;;; Chinese GB2312 (simplified)
4ed46869 KH	70	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	71
	72	(make-coding-system
4b9121fc	73	'chinese-iso-8bit 2 ?c
285aac85	74	"ISO 2022 based EUC encoding for Chinese GB2312 (MIME:GB2312)."
4138c943 KH	75	'(ascii chinese-gb2312 nil nil
	76	nil ascii-eol ascii-cntl nil nil nil nil)
	77	'((safe-charsets ascii chinese-gb2312)
ff890e66	78	(mime-charset . gb2312)))
4ed46869	79
71eabd24 RS	80	(define-coding-system-alias 'cn-gb-2312 'chinese-iso-8bit)
71eabd24 RS	81	(define-coding-system-alias 'euc-china 'chinese-iso-8bit)
a18aa841	82	(define-coding-system-alias 'euc-cn 'chinese-iso-8bit)
4f35555a KH	83	(define-coding-system-alias 'cn-gb 'chinese-iso-8bit)
4f35555a KH	84	(define-coding-system-alias 'gb2312 'chinese-iso-8bit)
6eac8f52	85	(define-coding-system-alias 'cp936 'chinese-iso-8bit)
f3f18123	86
4ed46869	87	(make-coding-system
4b9121fc	88	'chinese-hz 0 ?z
285aac85	89	"Hz/ZW 7-bit encoding for Chinese GB2312 (MIME:HZ-GB-2312)."
a18aa841	90	nil
4138c943 KH	91	'((safe-charsets ascii chinese-gb2312)
	92	(mime-charset . hz-gb-2312)
	93	(post-read-conversion . post-read-decode-hz)
	94	(pre-write-conversion . pre-write-encode-hz)))
f3f18123	95
71eabd24 RS	96	(define-coding-system-alias 'hz-gb-2312 'chinese-hz)
71eabd24 RS	97	(define-coding-system-alias 'hz 'chinese-hz)
4ed46869 KH	98
4ed46869 KH	99	(defun post-read-decode-hz (len)
69f24acf KH	100	(let ((pos (point))
	101	(buffer-modified-p (buffer-modified-p))
	102	last-coding-system-used)
	103	(prog1
	104	(decode-hz-region pos (+ pos len))
	105	(set-buffer-modified-p buffer-modified-p))))
4ed46869 KH	106
4ed46869 KH	107	(defun pre-write-encode-hz (from to)
1944b2e7	108	(let ((buf (current-buffer)))
d64a0ef7 KH	109	(set-buffer (generate-new-buffer " temp"))
	110	(if (stringp from)
	111	(insert from)
	112	(insert-buffer-substring buf from to))
	113	(let (last-coding-system-used)
	114	(encode-hz-region 1 (point-max)))
4ed46869 KH	115	nil))
4ed46869 KH	116
4ed46869	117	(set-language-info-alist
a564ccf9	118	"Chinese-GB" '((charset chinese-gb2312 chinese-sisheng)
4138c943 KH	119	(coding-system chinese-iso-8bit iso-2022-cn chinese-hz)
4138c943 KH	120	(coding-priority chinese-iso-8bit chinese-big5 iso-2022-cn)
a564ccf9 KH	121	(input-method . "chinese-py-punct")
a564ccf9 KH	122	(features china-util)
fab8252e	123	(sample-text . "Chinese (\e$AVPND\e(B,\e$AFUM(;0\e(B,\e$A::So\e(B) \e$ADc:C\e(B")
04c00c85 EZ	124	(documentation . "Support for Chinese GB2312 character set.")
04c00c85 EZ	125	(tutorial . "TUTORIAL.cn"))
4138c943	126	'("Chinese"))
4ed46869 KH	127
	128	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	129	;; Chinese BIG5 (traditional)
	130	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	131
	132	(make-coding-system
285aac85 WL	133	'chinese-big5 3 ?B
285aac85 WL	134	"BIG5 8-bit encoding for Chinese (MIME:Big5)."
4138c943 KH	135	nil
4138c943 KH	136	'((safe-charsets ascii chinese-big5-1 chinese-big5-2)
ff890e66	137	(mime-charset . big5)
d4c97509 KH	138	(charset-origin-alist (chinese-big5-1 "BIG5" encode-big5-char)
d4c97509 KH	139	(chinese-big5-2 "BIG5" encode-big5-char))))
4ed46869	140
71eabd24 RS	141	(define-coding-system-alias 'big5 'chinese-big5)
71eabd24 RS	142	(define-coding-system-alias 'cn-big5 'chinese-big5)
6eac8f52	143	(define-coding-system-alias 'cp950 'chinese-big5)
f3f18123	144
4ed46869 KH	145	;; Big5 font requires special encoding.
	146	(define-ccl-program ccl-encode-big5-font
	147	`(0
	148	;; In: R0:chinese-big5-1 or chinese-big5-2
	149	;; R1:position code 1
	150	;; R2:position code 2
	151	;; Out: R1:font code point 1
	152	;; R2:font code point 2
	153	((r2 = ((((r1 - ?\x21) * 94) + r2) - ?\x21))
	154	(if (r0 == ,(charset-id 'chinese-big5-2)) (r2 += 6280))
	155	(r1 = ((r2 / 157) + ?\xA1))
	156	(r2 %= 157)
	157	(if (r2 < ?\x3F) (r2 += ?\x40) (r2 += ?\x62))))
	158	"CCL program to encode a Big5 code to code point of Big5 font.")
	159
	160	(setq font-ccl-encoder-alist
	161	(cons (cons "big5" ccl-encode-big5-font) font-ccl-encoder-alist))
	162
4ed46869	163	(set-language-info-alist
a564ccf9	164	"Chinese-BIG5" '((charset chinese-big5-1 chinese-big5-2)
4138c943 KH	165	(coding-system chinese-big5 chinese-iso-7bit)
4138c943 KH	166	(coding-priority chinese-big5 iso-2022-cn chinese-iso-8bit)
a564ccf9 KH	167	(input-method . "chinese-py-punct-b5")
a564ccf9 KH	168	(features china-util)
fab8252e	169	(sample-text . "Cantonese (\e$(0GnM$\e(B,\e$(0N]0Hd\e(B) \e$(0/=(\e(B, \e$(0+$)p\e(B")
04c00c85 EZ	170	(documentation . "Support for Chinese Big5 character set.")
04c00c85 EZ	171	(tutorial . "TUTORIAL.zh"))
4138c943	172	'("Chinese"))
4ed46869 KH	173
	174	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	175	;; Chinese CNS11643 (traditional)
	176	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	177
285aac85 WL	178	(defvar big5-to-cns (make-translation-table)
	179	"Translation table for encoding to `euc-tw'.")
	180	;; Could have been done by china-util loaded before.
	181	(unless (get 'big5-to-cns 'translation-table)
	182	(define-translation-table 'big5-to-cns big5-to-cns))
	183
	184	(define-ccl-program ccl-decode-euc-tw
	185	;; CNS plane 1 needs either two or four bytes in EUC-TW encoding;
	186	;; CNS planes 2 to 7 always need four bytes. In internal encoding of
	187	;; Emacs, CNS planes 1 and 2 need three bytes, and planes 3 to 7 need
	188	;; four bytes. Thus a buffer magnification value of 2 (for both
	189	;; encoding and decoding) is sufficient.
	190	`(2
	191	;; we don't have enough registers to hold all charset-ids
	192	((r4 = ,(charset-id 'chinese-cns11643-1))
	193	(r5 = ,(charset-id 'chinese-cns11643-2))
	194	(r6 = ,(charset-id 'chinese-cns11643-3))
	195	(loop
	196	(read-if (r0 < #x80)
	197	;; ASCII
	198	(write-repeat r0)
	199	;; not ASCII
	200	(if (r0 == #x8E)
	201	;; single shift
	202	(read-if (r1 < #xA1)
	203	;; invalid byte
	204	((write r0)
	205	(write-repeat r1))
	206	(if (r1 > #xA7)
	207	;; invalid plane
	208	((write r0)
	209	(write-repeat r1))
	210	;; OK, we have a plane
	211	(read-if (r2 < #xA1)
	212	;; invalid first byte
	213	((write r0 r1)
	214	(write-repeat r2))
	215	(read-if (r3 < #xA1)
	216	;; invalid second byte
	217	((write r0 r1 r2)
	218	(write-repeat r3))
	219	;; CNS 1-7, finally
	220	((branch (r1 - #xA1)
	221	(r1 = r4)
	222	(r1 = r5)
	223	(r1 = r6)
	224	(r1 = ,(charset-id 'chinese-cns11643-4))
	225	(r1 = ,(charset-id 'chinese-cns11643-5))
	226	(r1 = ,(charset-id 'chinese-cns11643-6))
	227	(r1 = ,(charset-id 'chinese-cns11643-7)))
	228	(r2 = ((((r2 - #x80) << 7) + r3) - #x80))
	229	(write-multibyte-character r1 r2)
	230	(repeat))))))
	231	;; standard EUC
	232	(if (r0 < #xA1)
	233	;; invalid first byte
	234	(write-repeat r0)
	235	(read-if (r1 < #xA1)
	236	;; invalid second byte
	237	((write r0)
	238	(write-repeat r1))
	239	;; CNS 1, finally
	240	((r1 = ((((r0 - #x80) << 7) + r1) - #x80))
	241	(write-multibyte-character r4 r1)
242	(repeat)))))))))
243	"CCL program to decode EUC-TW encoding."
244	)
245
246	(define-ccl-program ccl-encode-euc-tw
247	`(2
248	;; we don't have enough registers to hold all charset-ids
249	((r2 = ,(charset-id 'ascii))
250	(r3 = ,(charset-id 'chinese-big5-1))
251	(r4 = ,(charset-id 'chinese-big5-2))
252	(r5 = ,(charset-id 'chinese-cns11643-1))
253	(r6 = ,(charset-id 'chinese-cns11643-2))
254	(loop
255	(read-multibyte-character r0 r1)
256	(if (r0 == r2)
257	(write-repeat r1)
258	(;; Big 5 encoded characters are first translated to CNS
259	(if (r0 == r3)
260	(translate-character big5-to-cns r0 r1)
261	(if (r0 == r4)
262	(translate-character big5-to-cns r0 r1)))
263	(if (r0 == r5)
264	(r0 = #xA1)
265	(if (r0 == r6)
266	(r0 = #xA2)
267	(if (r0 == ,(charset-id 'chinese-cns11643-3))
268	(r0 = #xA3)
269	(if (r0 == ,(charset-id 'chinese-cns11643-4))
270	(r0 = #xA4)
271	(if (r0 == ,(charset-id 'chinese-cns11643-5))
272	(r0 = #xA5)
273	(if (r0 == ,(charset-id 'chinese-cns11643-6))
274	(r0 = #xA6)
275	(if (r0 == ,(charset-id 'chinese-cns11643-7))
276	(r0 = #xA7)
277	;; not CNS. We use a dummy character which
278	;; can't occur in EUC-TW encoding to indicate
279	;; this.
280	(write-repeat #xFF))))))))))
281	(if (r0 != #xA1)
282	;; single shift and CNS plane
283	((write #x8E)
284	(write r0)))
285	(write ((r1 >> 7) + #x80))
286	(write ((r1 % #x80) + #x80))
287	(repeat))))
288	"CCL program to encode EUC-TW encoding."
289	)
290
291	(defun euc-tw-pre-write-conversion (beg end)
292	"Semi-dummy pre-write function effectively to autoload china-util."
293	;; Ensure translation table is loaded.
294	(require 'china-util)
295	;; Don't do this again.
296	(coding-system-put 'euc-tw 'pre-write-conversion nil)
297	nil)
298
299	(make-coding-system
300	'euc-tw 4 ?Z
301	"ISO 2022 based EUC encoding for Chinese CNS11643.
302	Big5 encoding is accepted for input also (which is then converted to CNS)."
303	'(ccl-decode-euc-tw . ccl-encode-euc-tw)
304	'((safe-charsets ascii
305	chinese-big5-1
306	chinese-big5-2
307	chinese-cns11643-1
308	chinese-cns11643-2
309	chinese-cns11643-3
310	chinese-cns11643-4
311	chinese-cns11643-5
312	chinese-cns11643-6
313	chinese-cns11643-7)
314	(valid-codes (0 . 255))
315	(pre-write-conversion . euc-tw-pre-write-conversion)))
316
317	(define-coding-system-alias 'euc-taiwan 'euc-tw)
318
4ed46869	319	(set-language-info-alist
a564ccf9	320	"Chinese-CNS" '((charset chinese-cns11643-1 chinese-cns11643-2
4138c943 KH	321	chinese-cns11643-3 chinese-cns11643-4
	322	chinese-cns11643-5 chinese-cns11643-6
	323	chinese-cns11643-7)
285aac85 WL	324	(coding-system iso-2022-cn euc-tw)
	325	(coding-priority iso-2022-cn euc-tw chinese-big5
	326	chinese-iso-8bit)
a564ccf9 KH	327	(features china-util)
a564ccf9 KH	328	(input-method . "chinese-cns-quick")
285aac85	329	(documentation . "\
9da20928	330	Support for Chinese CNS character sets. Note that the EUC-TW coding system
285aac85	331	accepts Big5 for input also (which is then converted to CNS)."))
4138c943	332	'("Chinese"))
4ed46869	333
9da20928 DL	334	(set-language-info-alist
	335	"Chinese-EUC-TW" '((charset chinese-cns11643-1 chinese-cns11643-2
	336	chinese-cns11643-3 chinese-cns11643-4
	337	chinese-cns11643-5 chinese-cns11643-6
	338	chinese-cns11643-7 chinese-big5-1 chinese-big5-2)
	339	(coding-system euc-tw iso-2022-cn)
	340	(coding-priority euc-tw chinese-big5 iso-2022-cn
	341	chinese-iso-8bit)
	342	(features china-util)
	343	(input-method . "chinese-cns-quick")
	344	(documentation . "\
	345	Support for Chinese, prefering the EUC-TW character set. Note that
	346	the EUC-TW coding system accepts Big5 for input also (which is then
	347	converted to CNS)."))
	348	'("Chinese"))
	349
41da80b1 DL	350	(provide 'chinese)
41da80b1 DL	351
ab5796a9	352	;;; arch-tag: b82fcf7a-84f6-4e0b-b38c-1742dac0e09f
4ed46869	353	;;; chinese.el ends here