[Emacs-diffs] Changes to emacs/lisp/language/china-util.el [lexbind]

[Miles Bader]

Index: emacs/lisp/language/china-util.el
diff -c /dev/null emacs/lisp/language/china-util.el:1.21.4.1
*** /dev/null   Tue Oct 14 19:39:37 2003
--- emacs/lisp/language/china-util.el   Tue Oct 14 19:39:24 2003
***************
*** 0 ****
--- 1,421 ----
+ ;;; china-util.el --- utilities for Chinese  -*- coding: iso-2022-7bit -*-
+ 
+ ;; Copyright (C) 1995, 2003 Electrotechnical Laboratory, JAPAN.
+ ;; Licensed to the Free Software Foundation.
+ ;; Copyright (C) 1995, 2001 Free Software Foundation, Inc.
+ 
+ ;; Keywords: mule, 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:
+ 
+ ;;; Code:
+ 
+ ;; Hz/ZW/EUC-TW encoding stuff
+ 
+ ;; HZ is an encoding method for Chinese character set GB2312 used
+ ;; widely in Internet.  It is very similar to 7-bit environment of
+ ;; ISO-2022.  The difference is that HZ uses the sequence "~{" and
+ ;; "~}" for designating GB2312 and ASCII respectively, hence, it
+ ;; doesn't uses ESC (0x1B) code.
+ 
+ ;; ZW is another encoding method for Chinese character set GB2312.  It
+ ;; encodes Chinese characters line by line by starting each line with
+ ;; the sequence "zW".  It also uses only 7-bit as HZ.
+ 
+ ;; EUC-TW is similar to EUC-KS or EUC-JP.  Its main character set is
+ ;; plane 1 of CNS 11643; characters of planes 2 to 7 are accessed with
+ ;; a single shift escape followed by three bytes: the first gives the
+ ;; plane, the second and third the character code.  Note that characters
+ ;; of plane 1 are (redundantly) accessible with a single shift escape
+ ;; also.
+ 
+ ;; ISO-2022 escape sequence to designate GB2312.
+ (defvar iso2022-gb-designation "\e$A")
+ ;; HZ escape sequence to designate GB2312.
+ (defvar hz-gb-designnation "~{")
+ ;; ISO-2022 escape sequence to designate ASCII.
+ (defvar iso2022-ascii-designation "\e(B")
+ ;; HZ escape sequence to designate ASCII.
+ (defvar hz-ascii-designnation "~}")
+ ;; Regexp of ZW sequence to start GB2312.
+ (defvar zw-start-gb "^zW")
+ ;; Regexp for start of GB2312 in an encoding mixture of HZ and ZW.
+ (defvar hz/zw-start-gb
+   (concat hz-gb-designnation "\\|" zw-start-gb "\\|[^\0-\177]"))
+ 
+ (defvar decode-hz-line-continuation nil
+   "Flag to tell if we should care line continuation convention of Hz.")
+ 
+ (defconst hz-set-msb-table
+   (eval-when-compile
+     (let ((chars nil)
+         (i 0))
+       (while (< i 33)
+       (push i chars)
+       (setq i (1+ i)))
+       (while (< i 127)
+       (push (+ i 128) chars)
+       (setq i (1+ i)))
+       (apply 'string (nreverse chars)))))
+ 
+ ;;;###autoload
+ (defun decode-hz-region (beg end)
+   "Decode HZ/ZW encoded text in the current region.
+ Return the length of resulting text."
+   (interactive "r")
+   (save-excursion
+     (save-restriction
+       (let (pos ch)
+       (narrow-to-region beg end)
+ 
+       ;; We, at first, convert HZ/ZW to `euc-china',
+       ;; then decode it.
+ 
+       ;; "~\n" -> "\n", "~~" -> "~"
+       (goto-char (point-min))
+       (while (search-forward "~" nil t)
+         (setq ch (following-char))
+         (if (or (= ch ?\n) (= ch ?~)) (delete-char -1)))
+ 
+       ;; "^zW...\n" -> Chinese GB2312
+       ;; "~{...~}"  -> Chinese GB2312
+       (goto-char (point-min))
+       (setq beg nil)
+       (while (re-search-forward hz/zw-start-gb nil t)
+         (setq pos (match-beginning 0)
+               ch (char-after pos))
+         ;; Record the first position to start conversion.
+         (or beg (setq beg pos))
+         (end-of-line)
+         (setq end (point))
+         (if (>= ch 128)               ; 8bit GB2312
+             nil
+           (goto-char pos)
+           (delete-char 2)
+           (setq end (- end 2))
+           (if (= ch ?z)                       ; ZW -> euc-china
+               (progn
+                 (translate-region (point) end hz-set-msb-table)
+                 (goto-char end))
+             (if (search-forward hz-ascii-designnation
+                                 (if decode-hz-line-continuation nil end)
+                                 t)
+                 (delete-char -2))
+             (setq end (point))
+             (translate-region pos (point) hz-set-msb-table))))
+       (if beg
+           (decode-coding-region beg end 'euc-china)))
+       (- (point-max) (point-min)))))
+ 
+ ;;;###autoload
+ (defun decode-hz-buffer ()
+   "Decode HZ/ZW encoded text in the current buffer."
+   (interactive)
+   (decode-hz-region (point-min) (point-max)))
+ 
+ ;;;###autoload
+ (defun encode-hz-region (beg end)
+   "Encode the text in the current region to HZ.
+ Return the length of resulting text."
+   (interactive "r")
+   (save-excursion
+     (save-restriction
+       (narrow-to-region beg end)
+ 
+       ;; "~" -> "~~"
+       (goto-char (point-min))
+       (while (search-forward "~" nil t)       (insert ?~))
+ 
+       ;; Chinese GB2312 -> "~{...~}"
+       (goto-char (point-min))
+       (if (re-search-forward "\\cc" nil t)
+         (let (pos)
+           (goto-char (setq pos (match-beginning 0)))
+           (encode-coding-region pos (point-max) 'iso-2022-7bit)
+           (goto-char pos)
+           (while (search-forward iso2022-gb-designation nil t)
+             (delete-char -3)
+             (insert hz-gb-designnation))
+           (goto-char pos)
+           (while (search-forward iso2022-ascii-designation nil t)
+             (delete-char -3)
+             (insert hz-ascii-designnation))))
+       (- (point-max) (point-min)))))
+ 
+ ;;;###autoload
+ (defun encode-hz-buffer ()
+   "Encode the text in the current buffer to HZ."
+   (interactive)
+   (encode-hz-region (point-min) (point-max)))
+ 
+ ;; The following sets up a translation table (big5-to-cns) from Big 5
+ ;; to CNS encoding, using some auxiliary functions to make the code
+ ;; more readable.
+ 
+ ;; Many kudos to Himi!  The used code has been adapted from his
+ ;; mule-ucs package.
+ 
+ (eval-when-compile
+ (defun big5-to-flat-code (num)
+   "Convert NUM in Big 5 encoding to a `flat code'.
+ 0xA140 will be mapped to position 0, 0xA141 to position 1, etc.
+ There are no gaps in the flat code."
+ 
+   (let ((hi (/ num 256))
+         (lo (% num 256)))
+     (+ (* 157 (- hi #xa1))
+        (- lo (if (>= lo #xa1) 98 64)))))
+ 
+ (defun flat-code-to-big5 (num)
+   "Convert NUM from a `flat code' to Big 5 encoding.
+ This is the inverse function of `big5-to-flat-code'."
+ 
+   (let ((hi (/ num 157))
+         (lo (% num 157)))
+     (+ (* 256 (+ hi #xa1))
+        (+ lo (if (< lo 63) 64 98)))))
+ 
+ (defun euc-to-flat-code (num)
+   "Convert NUM in EUC encoding (in GL representation) to a `flat code'.
+ 0x2121 will be mapped to position 0, 0x2122 to position 1, etc.
+ There are no gaps in the flat code."
+ 
+   (let ((hi (/ num 256))
+         (lo (% num 256)))
+     (+ (* 94 (- hi #x21))
+        (- lo #x21))))
+ 
+ (defun flat-code-to-euc (num)
+   "Convert NUM from a `flat code' to EUC encoding (in GL representation).
+ The inverse function of `euc-to-flat-code'.  The high and low bytes are
+ returned in a list."
+ 
+   (let ((hi (/ num 94))
+         (lo (% num 94)))
+     (list (+ hi #x21) (+ lo #x21))))
+ 
+ (defun expand-euc-big5-alist (alist)
+   "Create a translation table and fills it with data given in ALIST.
+ Elements of ALIST can be either given as
+ 
+   ((euc-charset . startchar) . (big5-range-begin . big5-range-end))
+ 
+ or as
+ 
+   (euc-character . big5-charcode)
+ 
+ The former maps a range of glyphs in an EUC charset (where STARTCHAR
+ is in GL representation) to a certain range of Big 5 encoded
+ characters, the latter maps a single glyph.  Glyphs which can't be
+ mapped will be represented with the byte 0xFF.
+ 
+ The return value is the filled translation table."
+ 
+   (let ((chartable (make-char-table 'translation-table #xFF))
+         char
+         big5
+         i
+         end
+         codepoint
+         charset)
+     (dolist (elem alist)
+       (setq char (car elem)
+             big5 (cdr elem))
+       (cond ((and (consp char)
+                   (consp big5))
+            (setq i (big5-to-flat-code (car big5))
+                  end (big5-to-flat-code (cdr big5))
+                  codepoint (euc-to-flat-code (cdr char))
+                  charset (car char))
+            (while (>= end i)
+              (aset chartable
+                    (decode-big5-char (flat-code-to-big5 i))
+                    (apply (function make-char)
+                           charset
+                           (flat-code-to-euc codepoint)))
+              (setq i (1+ i)
+                    codepoint (1+ codepoint))))
+             ((and (char-valid-p char)
+                   (numberp big5))
+            (setq i (decode-big5-char big5))
+            (aset chartable i char))
+             (t
+              (error "Unknown slot type: %S" elem))))
+     ;; the return value
+     chartable)))
+ 
+ ;; All non-CNS encodings are commented out.
+ 
+ (define-translation-table 'big5-to-cns
+   (eval-when-compile
+   (expand-euc-big5-alist
+    '(
+      ;; Symbols
+      ((chinese-cns11643-1 . #x2121) . (#xA140 . #xA1F5))
+      (?$(G"X(B . #xA1F6)
+      (?$(G"W(B . #xA1F7)
+      ((chinese-cns11643-1 . #x2259) . (#xA1F8 . #xA2AE))
+      ((chinese-cns11643-1 . #x2421) . (#xA2AF . #xA3BF))
+      ;; Control codes (vendor dependent)
+      ((chinese-cns11643-1 . #x4221) . (#xA3C0 . #xA3E0))
+      ;; Level 1 Ideographs
+      ((chinese-cns11643-1 . #x4421) . (#xA440 . #xACFD))
+      (?$(GWS(B . #xACFE)
+      ((chinese-cns11643-1 . #x5323) . (#xAD40 . #xAFCF))
+      ((chinese-cns11643-1 . #x5754) . (#xAFD0 . #xBBC7))
+      ((chinese-cns11643-1 . #x6B51) . (#xBBC8 . #xBE51))
+      (?$(GkP(B . #xBE52)
+      ((chinese-cns11643-1 . #x6F5C) . (#xBE53 . #xC1AA))
+      ((chinese-cns11643-1 . #x7536) . (#xC1AB . #xC2CA))
+      (?$(Gu5(B . #xC2CB)
+      ((chinese-cns11643-1 . #x7737) . (#xC2CC . #xC360))
+      ((chinese-cns11643-1 . #x782E) . (#xC361 . #xC3B8))
+      (?$(Gxe(B . #xC3B9)
+      (?$(Gxd(B . #xC3BA)
+      ((chinese-cns11643-1 . #x7866) . (#xC3BB . #xC455))
+      (?$(Gx-(B . #xC456)
+      ((chinese-cns11643-1 . #x7962) . (#xC457 . #xC67E))
+      ;; Symbols
+      ((chinese-cns11643-1 . #x2621) . (#xC6A1 . #xC6BE))
+      ;; Radicals
+      (?$(G'#(B . #xC6BF)
+      (?$(G'$(B . #xC6C0)
+      (?$(G'&(B . #xC6C1)
+      (?$(G'((B . #xC6C2)
+      (?$(G'-(B . #xC6C3)
+      (?$(G'.(B . #xC6C4)
+      (?$(G'/(B . #xC6C5)
+      (?$(G'4(B . #xC6C6)
+      (?$(G'7(B . #xC6C7)
+      (?$(G':(B . #xC6C8)
+      (?$(G'<(B . #xC6C9)
+      (?$(G'B(B . #xC6CA)
+      (?$(G'G(B . #xC6CB)
+      (?$(G'N(B . #xC6CC)
+      (?$(G'S(B . #xC6CD)
+      (?$(G'T(B . #xC6CE)
+      (?$(G'U(B . #xC6CF)
+      (?$(G'Y(B . #xC6D0)
+      (?$(G'Z(B . #xC6D1)
+      (?$(G'a(B . #xC6D2)
+      (?$(G'f(B . #xC6D3)
+      (?$(G()(B . #xC6D4)
+      (?$(G(*(B . #xC6D5)
+      (?$(G(c(B . #xC6D6)
+      (?$(G(l(B . #xC6D7)
+      ;; Diacritical Marks
+      ; ((japanese-jisx0208 . #x212F) . (#xC6D8 . #xC6D9))
+      ;; Japanese Kana Supplement
+      ; ((japanese-jisx0208 . #x2133) . (#xC6DA . #xC6E3))
+      ;; Japanese Hiragana
+      ; ((japanese-jisx0208 . #x2421) . (#xC6E7 . #xC77A))
+      ;; Japanese Katakana
+      ; ((japanese-jisx0208 . #x2521) . (#xC77B . #xC7F2))
+      ;; Cyrillic Characters
+      ; ((japanese-jisx0208 . #x2721) . (#xC7F3 . #xC854))
+      ; ((japanese-jisx0208 . #x2751) . (#xC855 . #xC875))
+      ;; Special Chinese Characters
+      (?$(J!#(B . #xC879)
+      (?$(J!$(B . #xC87B)
+      (?$(J!*(B . #xC87D)
+      (?$(J!R(B . #xC8A2)
+ 
+      ;; JIS X 0208 NOT SIGN (cf. U+00AC)
+      ; (?$B"L(B . #xC8CD)
+      ;; JIS X 0212 BROKEN BAR (cf. U+00A6)
+      ; (?$(D"C(B . #xC8CE)
+ 
+      ;; GB 2312 characters
+      ; (?$A!d(B . #xC8CF)
+      ; (?$A!e(B . #xC8D0)
+         ;;;;; C8D1 - Japanese `($B3t(B)'
+      ; (?$A!m(B . #xC8D2)
+         ;;;;; C8D2 - Tel.
+ 
+      ;; Level 2 Ideographs
+      ((chinese-cns11643-2 . #x2121) . (#xC940 . #xC949))
+      (?$(GDB(B . #xC94A);; a duplicate of #xA461
+      ((chinese-cns11643-2 . #x212B) . (#xC94B . #xC96B))
+      ((chinese-cns11643-2 . #x214D) . (#xC96C . #xC9BD))
+      (?$(H!L(B . #xC9BE)
+      ((chinese-cns11643-2 . #x217D) . (#xC9BF . #xC9EC))
+      ((chinese-cns11643-2 . #x224E) . (#xC9ED . #xCAF6))
+      (?$(H"M(B . #xCAF7)
+      ((chinese-cns11643-2 . #x2439) . (#xCAF8 . #xD6CB))
+      (?$(H>c(B . #xD6CC)
+      ((chinese-cns11643-2 . #x3770) . (#xD6CD . #xD779))
+      (?$(H?j(B . #xD77A)
+      ((chinese-cns11643-2 . #x387E) . (#xD77B . #xDADE))
+      (?$(H7o(B . #xDADF)
+      ((chinese-cns11643-2 . #x3E64) . (#xDAE0 . #xDBA6))
+      ((chinese-cns11643-2 . #x3F6B) . (#xDBA7 . #xDDFB))
+      (?$(HAv(B . #xDDFC);; a duplicate of #xDCD1
+      ((chinese-cns11643-2 . #x4424) . (#xDDFD . #xE8A2))
+      ((chinese-cns11643-2 . #x554C) . (#xE8A3 . #xE975))
+      ((chinese-cns11643-2 . #x5723) . (#xE976 . #xEB5A))
+      ((chinese-cns11643-2 . #x5A29) . (#xEB5B . #xEBF0))
+      (?$(HUK(B . #xEBF1)
+      ((chinese-cns11643-2 . #x5B3F) . (#xEBF2 . #xECDD))
+      (?$(HW"(B . #xECDE)
+      ((chinese-cns11643-2 . #x5C6A) . (#xECDF . #xEDA9))
+      ((chinese-cns11643-2 . #x5D75) . (#xEDAA . #xEEEA))
+      (?$(Hd/(B . #xEEEB)
+      ((chinese-cns11643-2 . #x6039) . (#xEEEC . #xF055))
+      (?$(H]t(B . #xF056)
+      ((chinese-cns11643-2 . #x6243) . (#xF057 . #xF0CA))
+      (?$(HZ((B . #xF0CB)
+      ((chinese-cns11643-2 . #x6337) . (#xF0CC . #xF162))
+      ((chinese-cns11643-2 . #x6430) . (#xF163 . #xF16A))
+      (?$(Hga(B . #xF16B)
+      ((chinese-cns11643-2 . #x6438) . (#xF16C . #xF267))
+      (?$(Hi4(B . #xF268)
+      ((chinese-cns11643-2 . #x6573) . (#xF269 . #xF2C2))
+      ((chinese-cns11643-2 . #x664E) . (#xF2C3 . #xF374))
+      ((chinese-cns11643-2 . #x6762) . (#xF375 . #xF465))
+      ((chinese-cns11643-2 . #x6935) . (#xF466 . #xF4B4))
+      (?$(HfM(B . #xF4B5)
+      ((chinese-cns11643-2 . #x6962) . (#xF4B6 . #xF4FC))
+      ((chinese-cns11643-2 . #x6A4C) . (#xF4FD . #xF662))
+      (?$(HjK(B . #xF663)
+      ((chinese-cns11643-2 . #x6C52) . (#xF664 . #xF976))
+      ((chinese-cns11643-2 . #x7167) . (#xF977 . #xF9C3))
+      (?$(Hqf(B . #xF9C4)
+      (?$(Hr4(B . #xF9C5)
+      (?$(address@hidden(B . #xF9C6)
+      ((chinese-cns11643-2 . #x7235) . (#xF9C7 . #xF9D1))
+      ((chinese-cns11643-2 . #x7241) . (#xF9D2 . #xF9D5))
+ 
+      ;; Additional Ideographs
+      (?$(IC7(B . #xF9D6)
+      (?$(IOP(B . #xF9D7)
+      (?$(IDN(B . #xF9D8)
+      (?$(IPJ(B . #xF9D9)
+      (?$(I,](B . #xF9DA)
+      (?$(I=~(B . #xF9DB)
+      (?$(IK\(B . #xF9DC)
+     )
+   ))
+ )
+ 
+ ;;
+ (provide 'china-util)
+ 
+ ;;; arch-tag: 5a47b084-b9ac-420e-8191-70c5b3a14836
+ ;;; china-util.el ends here