-;;; china-util.el --- utilities for Chinese -*- coding: iso-2022-7bit -*-
-
-;; Copyright (C) 1995, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
-;; Free Software Foundation, Inc.
-;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
-;; 2005, 2006, 2007, 2008
-;; National Institute of Advanced Industrial Science and Technology (AIST)
-;; Registration Number H14PRO021
-
-;; 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 3, 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:
-
-;;; 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.
-
-;; Silence the compiler, which otherwise warns that these functions
-;; might not be defined at runtime. They are only used when compiling.
-(declare-function big5-to-flat-code "china-util" (num))
-(declare-function flat-code-to-big5 "china-util" (num))
-(declare-function euc-to-flat-code "china-util" (num))
-(declare-function flat-code-to-euc "china-util" (num))
-
-(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))
- (?\e$(G"X\e(B . #xA1F6)
- (?\e$(G"W\e(B . #xA1F7)
- ((chinese-cns11643-1 . #x2259) . (#xA1F8 . #xA2AE))
- ((chinese-cns11643-1 . #x2421) . (#xA2AF . #xA3BF))
- ;; Control codes (vendor dependent)
- ((chinese-cns11643-1 . #x4221) . (#xA3C0 . #xA3E0))
- ;; Level 1 Ideographs
- ((chinese-cns11643-1 . #x4421) . (#xA440 . #xACFD))
- (?\e$(GWS\e(B . #xACFE)
- ((chinese-cns11643-1 . #x5323) . (#xAD40 . #xAFCF))
- ((chinese-cns11643-1 . #x5754) . (#xAFD0 . #xBBC7))
- ((chinese-cns11643-1 . #x6B51) . (#xBBC8 . #xBE51))
- (?\e$(GkP\e(B . #xBE52)
- ((chinese-cns11643-1 . #x6F5C) . (#xBE53 . #xC1AA))
- ((chinese-cns11643-1 . #x7536) . (#xC1AB . #xC2CA))
- (?\e$(Gu5\e(B . #xC2CB)
- ((chinese-cns11643-1 . #x7737) . (#xC2CC . #xC360))
- ((chinese-cns11643-1 . #x782E) . (#xC361 . #xC3B8))
- (?\e$(Gxe\e(B . #xC3B9)
- (?\e$(Gxd\e(B . #xC3BA)
- ((chinese-cns11643-1 . #x7866) . (#xC3BB . #xC455))
- (?\e$(Gx-\e(B . #xC456)
- ((chinese-cns11643-1 . #x7962) . (#xC457 . #xC67E))
- ;; Symbols
- ((chinese-cns11643-1 . #x2621) . (#xC6A1 . #xC6BE))
- ;; Radicals
- (?\e$(G'#\e(B . #xC6BF)
- (?\e$(G'$\e(B . #xC6C0)
- (?\e$(G'&\e(B . #xC6C1)
- (?\e$(G'(\e(B . #xC6C2)
- (?\e$(G'-\e(B . #xC6C3)
- (?\e$(G'.\e(B . #xC6C4)
- (?\e$(G'/\e(B . #xC6C5)
- (?\e$(G'4\e(B . #xC6C6)
- (?\e$(G'7\e(B . #xC6C7)
- (?\e$(G':\e(B . #xC6C8)
- (?\e$(G'<\e(B . #xC6C9)
- (?\e$(G'B\e(B . #xC6CA)
- (?\e$(G'G\e(B . #xC6CB)
- (?\e$(G'N\e(B . #xC6CC)
- (?\e$(G'S\e(B . #xC6CD)
- (?\e$(G'T\e(B . #xC6CE)
- (?\e$(G'U\e(B . #xC6CF)
- (?\e$(G'Y\e(B . #xC6D0)
- (?\e$(G'Z\e(B . #xC6D1)
- (?\e$(G'a\e(B . #xC6D2)
- (?\e$(G'f\e(B . #xC6D3)
- (?\e$(G()\e(B . #xC6D4)
- (?\e$(G(*\e(B . #xC6D5)
- (?\e$(G(c\e(B . #xC6D6)
- (?\e$(G(l\e(B . #xC6D7)
- ;; Diacritical Marks
- ; ((japanese-jisx0208 . #x212F) . (#xC6D8 . #xC6D9))
- ;; Japanese Kana Supplement
- ; ((japanese-jisx0208 . #x2133) . (#xC6DA . #xC6E3))
- ;; Japanese Hiragana
- ; ((japanese-jisx0208 . #x2421) . (#xC6E7 . #xC77A))
- ;; Japanese Katakana
- ; ((japanese-jisx0208 . #x2521) . (#xC77B . #xC7F2))
- ;; Cyrillic Characters
- ; ((japanese-jisx0208 . #x2721) . (#xC7F3 . #xC854))
- ; ((japanese-jisx0208 . #x2751) . (#xC855 . #xC875))
- ;; Special Chinese Characters
- (?\e$(J!#\e(B . #xC879)
- (?\e$(J!$\e(B . #xC87B)
- (?\e$(J!*\e(B . #xC87D)
- (?\e$(J!R\e(B . #xC8A2)
-
- ;; JIS X 0208 NOT SIGN (cf. U+00AC)
- ; (?\e$B"L\e(B . #xC8CD)
- ;; JIS X 0212 BROKEN BAR (cf. U+00A6)
- ; (?\e$(D"C\e(B . #xC8CE)
-
- ;; GB 2312 characters
- ; (?\e$A!d\e(B . #xC8CF)
- ; (?\e$A!e\e(B . #xC8D0)
- ;;;;; C8D1 - Japanese `(\e$B3t\e(B)'
- ; (?\e$A!m\e(B . #xC8D2)
- ;;;;; C8D2 - Tel.
-
- ;; Level 2 Ideographs
- ((chinese-cns11643-2 . #x2121) . (#xC940 . #xC949))
- (?\e$(GDB\e(B . #xC94A);; a duplicate of #xA461
- ((chinese-cns11643-2 . #x212B) . (#xC94B . #xC96B))
- ((chinese-cns11643-2 . #x214D) . (#xC96C . #xC9BD))
- (?\e$(H!L\e(B . #xC9BE)
- ((chinese-cns11643-2 . #x217D) . (#xC9BF . #xC9EC))
- ((chinese-cns11643-2 . #x224E) . (#xC9ED . #xCAF6))
- (?\e$(H"M\e(B . #xCAF7)
- ((chinese-cns11643-2 . #x2439) . (#xCAF8 . #xD6CB))
- (?\e$(H>c\e(B . #xD6CC)
- ((chinese-cns11643-2 . #x3770) . (#xD6CD . #xD779))
- (?\e$(H?j\e(B . #xD77A)
- ((chinese-cns11643-2 . #x387E) . (#xD77B . #xDADE))
- (?\e$(H7o\e(B . #xDADF)
- ((chinese-cns11643-2 . #x3E64) . (#xDAE0 . #xDBA6))
- ((chinese-cns11643-2 . #x3F6B) . (#xDBA7 . #xDDFB))
- (?\e$(HAv\e(B . #xDDFC);; a duplicate of #xDCD1
- ((chinese-cns11643-2 . #x4424) . (#xDDFD . #xE8A2))
- ((chinese-cns11643-2 . #x554C) . (#xE8A3 . #xE975))
- ((chinese-cns11643-2 . #x5723) . (#xE976 . #xEB5A))
- ((chinese-cns11643-2 . #x5A29) . (#xEB5B . #xEBF0))
- (?\e$(HUK\e(B . #xEBF1)
- ((chinese-cns11643-2 . #x5B3F) . (#xEBF2 . #xECDD))
- (?\e$(HW"\e(B . #xECDE)
- ((chinese-cns11643-2 . #x5C6A) . (#xECDF . #xEDA9))
- ((chinese-cns11643-2 . #x5D75) . (#xEDAA . #xEEEA))
- (?\e$(Hd/\e(B . #xEEEB)
- ((chinese-cns11643-2 . #x6039) . (#xEEEC . #xF055))
- (?\e$(H]t\e(B . #xF056)
- ((chinese-cns11643-2 . #x6243) . (#xF057 . #xF0CA))
- (?\e$(HZ(\e(B . #xF0CB)
- ((chinese-cns11643-2 . #x6337) . (#xF0CC . #xF162))
- ((chinese-cns11643-2 . #x6430) . (#xF163 . #xF16A))
- (?\e$(Hga\e(B . #xF16B)
- ((chinese-cns11643-2 . #x6438) . (#xF16C . #xF267))
- (?\e$(Hi4\e(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))
- (?\e$(HfM\e(B . #xF4B5)
- ((chinese-cns11643-2 . #x6962) . (#xF4B6 . #xF4FC))
- ((chinese-cns11643-2 . #x6A4C) . (#xF4FD . #xF662))
- (?\e$(HjK\e(B . #xF663)
- ((chinese-cns11643-2 . #x6C52) . (#xF664 . #xF976))
- ((chinese-cns11643-2 . #x7167) . (#xF977 . #xF9C3))
- (?\e$(Hqf\e(B . #xF9C4)
- (?\e$(Hr4\e(B . #xF9C5)
- (?\e$(Hr@\e(B . #xF9C6)
- ((chinese-cns11643-2 . #x7235) . (#xF9C7 . #xF9D1))
- ((chinese-cns11643-2 . #x7241) . (#xF9D2 . #xF9D5))
-
- ;; Additional Ideographs
- (?\e$(IC7\e(B . #xF9D6)
- (?\e$(IOP\e(B . #xF9D7)
- (?\e$(IDN\e(B . #xF9D8)
- (?\e$(IPJ\e(B . #xF9D9)
- (?\e$(I,]\e(B . #xF9DA)
- (?\e$(I=~\e(B . #xF9DB)
- (?\e$(IK\\e(B . #xF9DC)
- )
- ))
-)
-
-;;
-(provide 'china-util)
-
-;;; arch-tag: 5a47b084-b9ac-420e-8191-70c5b3a14836
-;;; china-util.el ends here
+;;; china-util.el --- utilities for Chinese -*- coding: iso-2022-7bit -*-
+
+;; Copyright (C) 1995, 2001-2012 Free Software Foundation, Inc.
+;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+;; 2005, 2006, 2007, 2008, 2009, 2010, 2011
+;; National Institute of Advanced Industrial Science and Technology (AIST)
+;; Registration Number H14PRO021
+;; Copyright (C) 2003
+;; National Institute of Advanced Industrial Science and Technology (AIST)
+;; Registration Number H13PRO009
+
+;; 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
+
+;;; 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 (decode-char 'eight-bit (+ 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)))
+
+;;;###autoload
+(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))))
+
+;;;###autoload
+(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))
+;;
+(provide 'china-util)
+
+;;; china-util.el ends here
HCoop / bpt / emacs.git / blobdiff