lisp/language/chinese.el

   1 ;;; chinese.el --- Support for Chinese
   2
   3 ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
   4 ;; Licensed to the Free Software Foundation.
   5
   6 ;; Keywords: multilingual, Chinese
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; For Chinese, three character sets GB2312, BIG5, and CNS11643 are
  28 ;; supported.
  29
  30 ;;; Code:
  31
  32 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  33 ;;; Chinese (general)
  34 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  35
  36 (make-coding-system
  37  'iso-2022-cn 2 ?C
  38  "ISO 2022 based 7bit encoding for Chinese GB and CNS (MIME:ISO-2022-CN)"
  39  '(ascii
  40    (nil chinese-gb2312 chinese-cns11643-1)
  41    (nil chinese-cns11643-2)
  42    nil
  43    nil ascii-eol ascii-cntl seven locking-shift single-shift nil nil nil
  44    init-bol)
  45  '((safe-charsets ascii chinese-gb2312 chinese-cns11643-1 chinese-cns11643-2)
  46    (mime-charset . iso-2022-cn)))
  47
  48 (define-coding-system-alias 'chinese-iso-7bit 'iso-2022-cn)
  49
  50 (make-coding-system
  51  'iso-2022-cn-ext 2 ?C
  52  "ISO 2022 based 7bit encoding for Chinese GB and CNS (MIME:ISO-2022-CN-EXT)"
  53  '(ascii
  54    (nil chinese-gb2312 chinese-cns11643-1)
  55    (nil chinese-cns11643-2)
  56    (nil chinese-cns11643-3 chinese-cns11643-4 chinese-cns11643-5
  57         chinese-cns11643-6 chinese-cns11643-7)
  58    nil ascii-eol ascii-cntl seven locking-shift single-shift nil nil nil
  59    init-bol)
  60  '((safe-charsets ascii chinese-gb2312 chinese-cns11643-1 chinese-cns11643-2
  61                   chinese-cns11643-3 chinese-cns11643-4 chinese-cns11643-5
  62                   chinese-cns11643-6 chinese-cns11643-7)
  63    (mime-charset . iso-2022-cn-ext)))
  64
  65 \f
  66 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  67 ;;; Chinese GB2312 (simplified)
  68 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  69
  70 (make-coding-system
  71  'chinese-iso-8bit 2 ?c
  72  "ISO 2022 based EUC encoding for Chinese GB2312 (MIME:CN-GB-2312)"
  73  '(ascii chinese-gb2312 nil nil
  74    nil ascii-eol ascii-cntl nil nil nil nil)
  75  '((safe-charsets ascii chinese-gb2312)
  76    (mime-charset . cn-gb-2312)))
  77
  78 (define-coding-system-alias 'cn-gb-2312 'chinese-iso-8bit)
  79 (define-coding-system-alias 'euc-china 'chinese-iso-8bit)
  80 (define-coding-system-alias 'euc-cn 'chinese-iso-8bit)
  81
  82 (make-coding-system
  83  'chinese-hz 0 ?z
  84  "Hz/ZW 7-bit encoding for Chinese GB2312 (MIME:HZ-GB-2312)"
  85  nil
  86  '((safe-charsets ascii chinese-gb2312)
  87    (mime-charset . hz-gb-2312)
  88    (post-read-conversion . post-read-decode-hz)
  89    (pre-write-conversion . pre-write-encode-hz)))
  90
  91 (define-coding-system-alias 'hz-gb-2312 'chinese-hz)
  92 (define-coding-system-alias 'hz 'chinese-hz)
  93
  94 (defun post-read-decode-hz (len)
  95   (let ((pos (point))
  96         (buffer-modified-p (buffer-modified-p))
  97         last-coding-system-used)
  98     (prog1
  99         (decode-hz-region pos (+ pos len))
 100       (set-buffer-modified-p buffer-modified-p))))
 101
 102 (defun pre-write-encode-hz (from to)
 103   (let ((buf (current-buffer))
 104         (work (get-buffer-create " *pre-write-encoding-work*")))
 105     (set-buffer work)
 106     (erase-buffer)
 107     (if (stringp from)
 108         (insert from)
 109       (insert-buffer-substring buf from to))
 110     (let (last-coding-system-used)
 111       (encode-hz-region 1 (point-max)))
 112     nil))
 113
 114 (set-language-info-alist
 115  "Chinese-GB" '((charset chinese-gb2312 chinese-sisheng)
 116                 (coding-system chinese-iso-8bit iso-2022-cn chinese-hz)
 117                 (coding-priority chinese-iso-8bit chinese-big5 iso-2022-cn)
 118                 (input-method . "chinese-py-punct")
 119                 (features china-util)
 120                 (sample-text . "Chinese (\e$AVPND\e(B,\e$AFUM(;0\e(B,\e$A::So\e(B)    \e$ADc:C\e(B")
 121                 (documentation . "Support for Chinese GB2312 character set."))
 122  '("Chinese"))
 123
 124 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 125 ;; Chinese BIG5 (traditional)
 126 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 127
 128 (make-coding-system
 129  'chinese-big5 3 ?B "BIG5 8-bit encoding for Chinese (MIME:CN-BIG5)"
 130  nil
 131  '((safe-charsets ascii chinese-big5-1 chinese-big5-2)
 132    (mime-charset . cn-big5)))
 133
 134 (define-coding-system-alias 'big5 'chinese-big5)
 135 (define-coding-system-alias 'cn-big5 'chinese-big5)
 136
 137 ;; Big5 font requires special encoding.
 138 (define-ccl-program ccl-encode-big5-font
 139   `(0
 140     ;; In:  R0:chinese-big5-1 or chinese-big5-2
 141     ;;      R1:position code 1
 142     ;;      R2:position code 2
 143     ;; Out: R1:font code point 1
 144     ;;      R2:font code point 2
 145     ((r2 = ((((r1 - ?\x21) * 94) + r2) - ?\x21))
 146      (if (r0 == ,(charset-id 'chinese-big5-2)) (r2 += 6280))
 147      (r1 = ((r2 / 157) + ?\xA1))
 148      (r2 %= 157)
 149      (if (r2 < ?\x3F) (r2 += ?\x40) (r2 += ?\x62))))
 150   "CCL program to encode a Big5 code to code point of Big5 font.")
 151
 152 (setq font-ccl-encoder-alist
 153       (cons (cons "big5" ccl-encode-big5-font) font-ccl-encoder-alist))
 154
 155 (set-language-info-alist
 156  "Chinese-BIG5" '((charset chinese-big5-1 chinese-big5-2)
 157                   (coding-system chinese-big5 chinese-iso-7bit)
 158                   (coding-priority chinese-big5 iso-2022-cn chinese-iso-8bit)
 159                   (input-method . "chinese-py-punct-b5")
 160                   (features china-util)
 161                   (sample-text . "Cantonese (\e$(0GnM$\e(B,\e$(0N]0*Hd\e(B) \e$(0*/=(\e(B, \e$(0+$)p\e(B")
 162                   (documentation . "Support for Chinese Big5 character set."))
 163  '("Chinese"))
 164
 165 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 166 ;; Chinese CNS11643 (traditional)
 167 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 168
 169 (set-language-info-alist
 170  "Chinese-CNS" '((charset chinese-cns11643-1 chinese-cns11643-2
 171                           chinese-cns11643-3 chinese-cns11643-4
 172                           chinese-cns11643-5 chinese-cns11643-6
 173                           chinese-cns11643-7)
 174                  (coding-system iso-2022-cn)
 175                  (coding-priority iso-2022-cn chinese-big5 chinese-iso-8bit)
 176                  (features china-util)
 177                  (input-method . "chinese-cns-quick")
 178                  (documentation . "Support for Chinese CNS character sets."))
 179  '("Chinese"))
 180
 181 ;;; chinese.el ends here