mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-16 09:50:25 +00:00
354 lines
12 KiB
EmacsLisp
354 lines
12 KiB
EmacsLisp
;;; 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., 51 Franklin Street, Fifth Floor,
|
||
;; Boston, MA 02110-1301, 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)
|
||
(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 ($AVPND(B,$AFUM(;0(B,$A::So(B) $ADc:C(B")
|
||
(documentation . "Support for Chinese GB2312 character set.")
|
||
(tutorial . "TUTORIAL.cn"))
|
||
'("Chinese"))
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; Chinese BIG5 (traditional)
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
||
(make-coding-system
|
||
'chinese-big5 3 ?B
|
||
"BIG5 8-bit encoding for Chinese (MIME:Big5)."
|
||
nil
|
||
'((safe-charsets ascii chinese-big5-1 chinese-big5-2)
|
||
(mime-charset . big5)
|
||
(charset-origin-alist (chinese-big5-1 "BIG5" encode-big5-char)
|
||
(chinese-big5-2 "BIG5" encode-big5-char))))
|
||
|
||
(define-coding-system-alias 'big5 'chinese-big5)
|
||
(define-coding-system-alias 'cn-big5 'chinese-big5)
|
||
(define-coding-system-alias 'cp950 'chinese-big5)
|
||
|
||
;; Big5 font requires special encoding.
|
||
(define-ccl-program ccl-encode-big5-font
|
||
`(0
|
||
;; In: R0:chinese-big5-1 or chinese-big5-2
|
||
;; R1:position code 1
|
||
;; R2:position code 2
|
||
;; Out: R1:font code point 1
|
||
;; R2:font code point 2
|
||
((r2 = ((((r1 - ?\x21) * 94) + r2) - ?\x21))
|
||
(if (r0 == ,(charset-id 'chinese-big5-2)) (r2 += 6280))
|
||
(r1 = ((r2 / 157) + ?\xA1))
|
||
(r2 %= 157)
|
||
(if (r2 < ?\x3F) (r2 += ?\x40) (r2 += ?\x62))))
|
||
"CCL program to encode a Big5 code to code point of Big5 font.")
|
||
|
||
(setq font-ccl-encoder-alist
|
||
(cons (cons "big5" ccl-encode-big5-font) font-ccl-encoder-alist))
|
||
|
||
(set-language-info-alist
|
||
"Chinese-BIG5" '((charset chinese-big5-1 chinese-big5-2)
|
||
(coding-system chinese-big5 chinese-iso-7bit)
|
||
(coding-priority chinese-big5 iso-2022-cn chinese-iso-8bit)
|
||
(input-method . "chinese-py-punct-b5")
|
||
(features china-util)
|
||
(sample-text . "Cantonese ($(0GnM$(B,$(0N]0*Hd(B) $(0*/=((B, $(0+$)p(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
|