lisp/language/japan-util.el

   1 ;;; japan-util.el --- utilities for Japanese -*- coding: iso-2022-7bit; -*-
   2
   3 ;; Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
   4 ;;   Free Software Foundation, Inc.
   5 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   6 ;;   2005, 2006, 2007, 2008
   7 ;;   National Institute of Advanced Industrial Science and Technology (AIST)
   8 ;;   Registration Number H14PRO021
   9
  10 ;; Keywords: mule, multilingual, Japanese
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software; you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation; either version 3, or (at your option)
  17 ;; any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  26 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  27 ;; Boston, MA 02110-1301, USA.
  28
  29 ;;; Commentary:
  30
  31 ;;; Code:
  32
  33 ;;;###autoload
  34 (defun setup-japanese-environment-internal ()
  35   ;; By default, we use 'japanese-iso-8bit for file names.  But, the
  36   ;; following prefer-coding-system will override it.
  37   (if (memq system-type '(windows-nt ms-dos cygwin))
  38       (prefer-coding-system 'japanese-shift-jis)
  39     (prefer-coding-system 'japanese-iso-8bit)))
  40
  41 (defconst japanese-kana-table
  42   '((?\e$B$"\e(B ?\e$B%"\e(B ?\e(I1\e(B) (?\e$B$$\e(B ?\e$B%$\e(B ?\e(I2\e(B) (?\e$B$&\e(B ?\e$B%&\e(B ?\e(I3\e(B) (?\e$B$(\e(B ?\e$B%(\e(B ?\e(I4\e(B) (?\e$B$*\e(B ?\e$B%*\e(B ?\e(I5\e(B)
  43     (?\e$B$+\e(B ?\e$B%+\e(B ?\e(I6\e(B) (?\e$B$-\e(B ?\e$B%-\e(B ?\e(I7\e(B) (?\e$B$/\e(B ?\e$B%/\e(B ?\e(I8\e(B) (?\e$B$1\e(B ?\e$B%1\e(B ?\e(I9\e(B) (?\e$B$3\e(B ?\e$B%3\e(B ?\e(I:\e(B)
  44     (?\e$B$5\e(B ?\e$B%5\e(B ?\e(I;\e(B) (?\e$B$7\e(B ?\e$B%7\e(B ?\e(I<\e(B) (?\e$B$9\e(B ?\e$B%9\e(B ?\e(I=\e(B) (?\e$B$;\e(B ?\e$B%;\e(B ?\e(I>\e(B) (?\e$B$=\e(B ?\e$B%=\e(B ?\e(I?\e(B)
  45     (?\e$B$?\e(B ?\e$B%?\e(B ?\e(I@\e(B) (?\e$B$A\e(B ?\e$B%A\e(B ?\e(IA\e(B) (?\e$B$D\e(B ?\e$B%D\e(B ?\e(IB\e(B) (?\e$B$F\e(B ?\e$B%F\e(B ?\e(IC\e(B) (?\e$B$H\e(B ?\e$B%H\e(B ?\e(ID\e(B)
  46     (?\e$B$J\e(B ?\e$B%J\e(B ?\e(IE\e(B) (?\e$B$K\e(B ?\e$B%K\e(B ?\e(IF\e(B) (?\e$B$L\e(B ?\e$B%L\e(B ?\e(IG\e(B) (?\e$B$M\e(B ?\e$B%M\e(B ?\e(IH\e(B) (?\e$B$N\e(B ?\e$B%N\e(B ?\e(II\e(B)
  47     (?\e$B$O\e(B ?\e$B%O\e(B ?\e(IJ\e(B) (?\e$B$R\e(B ?\e$B%R\e(B ?\e(IK\e(B) (?\e$B$U\e(B ?\e$B%U\e(B ?\e(IL\e(B) (?\e$B$X\e(B ?\e$B%X\e(B ?\e(IM\e(B) (?\e$B$[\e(B ?\e$B%[\e(B ?\e(IN\e(B)
  48     (?\e$B$^\e(B ?\e$B%^\e(B ?\e(IO\e(B) (?\e$B$_\e(B ?\e$B%_\e(B ?\e(IP\e(B) (?\e$B$`\e(B ?\e$B%`\e(B ?\e(IQ\e(B) (?\e$B$a\e(B ?\e$B%a\e(B ?\e(IR\e(B) (?\e$B$b\e(B ?\e$B%b\e(B ?\e(IS\e(B)
  49     (?\e$B$d\e(B ?\e$B%d\e(B ?\e(IT\e(B) (?\e$B$f\e(B ?\e$B%f\e(B ?\e(IU\e(B) (?\e$B$h\e(B ?\e$B%h\e(B ?\e(IV\e(B)
  50     (?\e$B$i\e(B ?\e$B%i\e(B ?\e(IW\e(B) (?\e$B$j\e(B ?\e$B%j\e(B ?\e(IX\e(B) (?\e$B$k\e(B ?\e$B%k\e(B ?\e(IY\e(B) (?\e$B$l\e(B ?\e$B%l\e(B ?\e(IZ\e(B) (?\e$B$m\e(B ?\e$B%m\e(B ?\e(I[\e(B)
  51     (?\e$B$o\e(B ?\e$B%o\e(B ?\e(I\\e(B) (?\e$B$p\e(B ?\e$B%p\e(B "\e(I2\e(B") (?\e$B$q\e(B ?\e$B%q\e(B "\e(I4\e(B") (?\e$B$r\e(B ?\e$B%r\e(B ?\e(I&\e(B)
  52     (?\e$B$s\e(B ?\e$B%s\e(B ?\e(I]\e(B)
  53     (?\e$B$,\e(B ?\e$B%,\e(B "\e(I6^\e(B") (?\e$B$.\e(B ?\e$B%.\e(B "\e(I7^\e(B") (?\e$B$0\e(B ?\e$B%0\e(B "\e(I8^\e(B") (?\e$B$2\e(B ?\e$B%2\e(B "\e(I9^\e(B") (?\e$B$4\e(B ?\e$B%4\e(B "\e(I:^\e(B")
  54     (?\e$B$6\e(B ?\e$B%6\e(B "\e(I;^\e(B") (?\e$B$8\e(B ?\e$B%8\e(B "\e(I<^\e(B") (?\e$B$:\e(B ?\e$B%:\e(B "\e(I=^\e(B") (?\e$B$<\e(B ?\e$B%<\e(B "\e(I>^\e(B") (?\e$B$>\e(B ?\e$B%>\e(B "\e(I?^\e(B")
  55     (?\e$B$@\e(B ?\e$B%@\e(B "\e(I@^\e(B") (?\e$B$B\e(B ?\e$B%B\e(B "\e(IA^\e(B") (?\e$B$E\e(B ?\e$B%E\e(B "\e(IB^\e(B") (?\e$B$G\e(B ?\e$B%G\e(B "\e(IC^\e(B") (?\e$B$I\e(B ?\e$B%I\e(B "\e(ID^\e(B")
  56     (?\e$B$P\e(B ?\e$B%P\e(B "\e(IJ^\e(B") (?\e$B$S\e(B ?\e$B%S\e(B "\e(IK^\e(B") (?\e$B$V\e(B ?\e$B%V\e(B "\e(IL^\e(B") (?\e$B$Y\e(B ?\e$B%Y\e(B "\e(IM^\e(B") (?\e$B$\\e(B ?\e$B%\\e(B "\e(IN^\e(B")
  57     (?\e$B$Q\e(B ?\e$B%Q\e(B "\e(IJ_\e(B") (?\e$B$T\e(B ?\e$B%T\e(B "\e(IK_\e(B") (?\e$B$W\e(B ?\e$B%W\e(B "\e(IL_\e(B") (?\e$B$Z\e(B ?\e$B%Z\e(B "\e(IM_\e(B") (?\e$B$]\e(B ?\e$B%]\e(B "\e(IN_\e(B")
  58     (?\e$B$!\e(B ?\e$B%!\e(B ?\e(I'\e(B) (?\e$B$#\e(B ?\e$B%#\e(B ?\e(I(\e(B) (?\e$B$%\e(B ?\e$B%%\e(B ?\e(I)\e(B) (?\e$B$'\e(B ?\e$B%'\e(B ?\e(I*\e(B) (?\e$B$)\e(B ?\e$B%)\e(B ?\e(I+\e(B)
  59     (?\e$B$C\e(B ?\e$B%C\e(B ?\e(I/\e(B)
  60     (?\e$B$c\e(B ?\e$B%c\e(B ?\e(I,\e(B) (?\e$B$e\e(B ?\e$B%e\e(B ?\e(I-\e(B) (?\e$B$g\e(B ?\e$B%g\e(B ?\e(I.\e(B)
  61     (?\e$B$n\e(B ?\e$B%n\e(B "\e(I\\e(B")
  62     ("\e$B$&!+\e(B" ?\e$B%t\e(B "\e(I3^\e(B") (nil ?\e$B%u\e(B "\e(I6\e(B") (nil ?\e$B%v\e(B "\e(I9\e(B"))
  63   "Japanese JISX0208 Kana character table.
  64 Each element is of the form (HIRAGANA KATAKANA HANKAKU-KATAKANA), where
  65 HIRAGANA and KATAKANA belong to `japanese-jisx0208',
  66 HANKAKU-KATAKANA belongs to `japanese-jisx0201-kana'.")
  67
  68 ;; Put properties 'katakana, 'hiragana, and 'jix0201 to each Japanese
  69 ;; kana characters for conversion among them.
  70 (let ((l japanese-kana-table)
  71       slot hiragana katakana jisx0201)
  72   (while l
  73     (setq slot (car l)
  74           hiragana (car slot) katakana (nth 1 slot) jisx0201 (nth 2 slot)
  75           l (cdr l))
  76     (if hiragana
  77         (if (stringp hiragana)
  78             (if (> (length hiragana) 1)
  79                 (let ((hira (aref hiragana 0)))
  80                   (put-char-code-property
  81                    hira 'kana-composition
  82                    (cons (cons (aref hiragana 1) katakana)
  83                          (get-char-code-property hira 'kana-composition)))))
  84           (put-char-code-property hiragana 'katakana katakana)
  85           (put-char-code-property hiragana 'jisx0201 jisx0201)))
  86     (when (integerp katakana)
  87       (put-char-code-property katakana 'hiragana hiragana)
  88       (put-char-code-property katakana 'jisx0201 jisx0201))
  89     (if jisx0201
  90         (if (stringp jisx0201)
  91             (if (> (length jisx0201) 1)
  92                 (let ((kana (aref jisx0201 0)))
  93                   (put-char-code-property
  94                    kana 'kana-composition
  95                    (cons (cons (aref jisx0201 1) katakana)
  96                          (get-char-code-property kana 'kana-composition)))))
  97           (put-char-code-property jisx0201 'hiragana hiragana)
  98           (put-char-code-property jisx0201 'katakana katakana)
  99           (put-char-code-property jisx0201 'jisx0208 katakana)))))
 100
 101 (defconst japanese-symbol-table
 102   '((?\\e$B!!\e(B ?\ ) (?\e$B!$\e(B ?, ?\e(I$\e(B) (?\e$B!%\e(B ?. ?\e(I!\e(B) (?\e$B!"\e(B ?, ?\e(I$\e(B) (?\e$B!#\e(B ?. ?\e(I!\e(B) (?\e$B!&\e(B nil ?\e(I%\e(B)
 103     (?\e$B!'\e(B ?:) (?\e$B!(\e(B ?\;) (?\e$B!)\e(B ??) (?\e$B!*\e(B ?!) (?\e$B!+\e(B nil ?\e(I^\e(B) (?\e$B!,\e(B nil ?\e(I_\e(B)
 104     (?\e$B!-\e(B ?') (?\e$B!.\e(B ?`) (?\e$B!0\e(B ?^) (?\e$B!2\e(B ?_) (?\e$B!<\e(B ?- ?\e(I0\e(B) (?\e$B!=\e(B ?-) (?\e$B!>\e(B ?-)
 105     (?\e$B!?\e(B ?/) (?\e$B!@\e(B ?\\) (?\e$B!A\e(B ?~)  (?\e$B!C\e(B ?|) (?\e$B!F\e(B ?`) (?\e$B!G\e(B ?') (?\e$B!H\e(B ?\") (?\e$B!I\e(B ?\")
 106     (?\\e$B!J\e(B ?\() (?\\e$B!K\e(B ?\)) (?\\e$B!N\e(B ?[) (?\\e$B!O\e(B ?]) (?\\e$B!P\e(B ?{) (?\\e$B!Q\e(B ?})
 107     (?\e$B!R\e(B ?<) (?\e$B!S\e(B ?>) (?\\e$B!V\e(B nil ?\\e(I"\e(B) (?\\e$B!W\e(B nil ?\\e(I#\e(B)
 108     (?\e$B!\\e(B ?+) (?\e$B!]\e(B ?-) (?\e$B!a\e(B ?=) (?\e$B!c\e(B ?<) (?\e$B!d\e(B ?>)
 109     (?\e$B!l\e(B ?') (?\e$B!m\e(B ?\") (?\e$B!o\e(B ?\\) (?\e$B!p\e(B ?$) (?\e$B!s\e(B ?%) (?\e$B!t\e(B ?#) (?\e$B!u\e(B ?&) (?\e$B!v\e(B ?*)
 110     (?\e$B!w\e(B ?@))
 111   "Japanese JISX0208 symbol character table.
 112   Each element is of the form (SYMBOL ASCII HANKAKU), where SYMBOL
 113 belongs to `japanese-jisx0208', ASCII belongs to `ascii', and HANKAKU
 114 belongs to `japanese-jisx0201-kana'.")
 115
 116 ;; Put properties 'jisx0208, 'jisx0201, and 'ascii to each Japanese
 117 ;; symbol and ASCII characters for conversion among them.
 118 (let ((l japanese-symbol-table)
 119       slot jisx0208 ascii jisx0201)
 120   (while l
 121     (setq slot (car l)
 122           jisx0208 (car slot) ascii (nth 1 slot) jisx0201 (nth 2 slot)
 123           l (cdr l))
 124     (if ascii
 125         (progn
 126           (put-char-code-property jisx0208 'ascii ascii)
 127           (put-char-code-property ascii 'jisx0208 jisx0208)))
 128     (if jisx0201
 129         (progn
 130           (put-char-code-property jisx0208 'jisx0201 jisx0201)
 131           (put-char-code-property jisx0201 'jisx0208 jisx0208)))))
 132
 133 (defconst japanese-alpha-numeric-table
 134   '((?\e$B#0\e(B . ?0) (?\e$B#1\e(B . ?1) (?\e$B#2\e(B . ?2) (?\e$B#3\e(B . ?3) (?\e$B#4\e(B . ?4)
 135     (?\e$B#5\e(B . ?5) (?\e$B#6\e(B . ?6) (?\e$B#7\e(B . ?7) (?\e$B#8\e(B . ?8) (?\e$B#9\e(B . ?9)
 136     (?\e$B#A\e(B . ?A) (?\e$B#B\e(B . ?B) (?\e$B#C\e(B . ?C) (?\e$B#D\e(B . ?D) (?\e$B#E\e(B . ?E)
 137     (?\e$B#F\e(B . ?F) (?\e$B#G\e(B . ?G) (?\e$B#H\e(B . ?H) (?\e$B#I\e(B . ?I) (?\e$B#J\e(B . ?J)
 138     (?\e$B#K\e(B . ?K) (?\e$B#L\e(B . ?L) (?\e$B#M\e(B . ?M) (?\e$B#N\e(B . ?N) (?\e$B#O\e(B . ?O)
 139     (?\e$B#P\e(B . ?P) (?\e$B#Q\e(B . ?Q) (?\e$B#R\e(B . ?R) (?\e$B#S\e(B . ?S) (?\e$B#T\e(B . ?T)
 140     (?\e$B#U\e(B . ?U) (?\e$B#V\e(B . ?V) (?\e$B#W\e(B . ?W) (?\e$B#X\e(B . ?X) (?\e$B#Y\e(B . ?Y) (?\e$B#Z\e(B . ?Z)
 141     (?\e$B#a\e(B . ?a) (?\e$B#b\e(B . ?b) (?\e$B#c\e(B . ?c) (?\e$B#d\e(B . ?d) (?\e$B#e\e(B . ?e)
 142     (?\e$B#f\e(B . ?f) (?\e$B#g\e(B . ?g) (?\e$B#h\e(B . ?h) (?\e$B#i\e(B . ?i) (?\e$B#j\e(B . ?j)
 143     (?\e$B#k\e(B . ?k) (?\e$B#l\e(B . ?l) (?\e$B#m\e(B . ?m) (?\e$B#n\e(B . ?n) (?\e$B#o\e(B . ?o)
 144     (?\e$B#p\e(B . ?p) (?\e$B#q\e(B . ?q) (?\e$B#r\e(B . ?r) (?\e$B#s\e(B . ?s) (?\e$B#t\e(B . ?t)
 145     (?\e$B#u\e(B . ?u) (?\e$B#v\e(B . ?v) (?\e$B#w\e(B . ?w) (?\e$B#x\e(B . ?x) (?\e$B#y\e(B . ?y) (?\e$B#z\e(B . ?z))
 146   "Japanese JISX0208 alpha numeric character table.
 147 Each element is of the form (ALPHA-NUMERIC ASCII), where ALPHA-NUMERIC
 148 belongs to `japanese-jisx0208', ASCII belongs to `ascii'.")
 149
 150 ;; Put properties 'jisx0208 and 'ascii to each Japanese alpha numeric
 151 ;; and ASCII characters for conversion between them.
 152 (let ((l japanese-alpha-numeric-table)
 153       slot jisx0208 ascii)
 154   (while l
 155     (setq slot (car l)
 156           jisx0208 (car slot) ascii (cdr slot)
 157           l (cdr l))
 158     (put-char-code-property jisx0208 'ascii ascii)
 159     (put-char-code-property ascii 'jisx0208 jisx0208)))
 160
 161 ;; Convert string STR by FUNC and return a resulting string.
 162 (defun japanese-string-conversion (str func &rest args)
 163   (let ((buf (get-buffer-create " *Japanese work*")))
 164     (save-excursion
 165       (set-buffer buf)
 166       (erase-buffer)
 167       (insert str)
 168       (apply func 1 (point) args)
 169       (buffer-string))))
 170
 171 ;;;###autoload
 172 (defun japanese-katakana (obj &optional hankaku)
 173   "Convert argument to Katakana and return that.
 174 The argument may be a character or string.  The result has the same type.
 175 The argument object is not altered--the value is a copy.
 176 Optional argument HANKAKU t means to convert to `hankaku' Katakana
 177  \(`japanese-jisx0201-kana'), in which case return value
 178  may be a string even if OBJ is a character if two Katakanas are
 179  necessary to represent OBJ."
 180   (if (stringp obj)
 181       (japanese-string-conversion obj 'japanese-katakana-region hankaku)
 182     (or (get-char-code-property obj (if hankaku 'jisx0201 'katakana))
 183         obj)))
 184
 185 ;;;###autoload
 186 (defun japanese-hiragana (obj)
 187   "Convert argument to Hiragana and return that.
 188 The argument may be a character or string.  The result has the same type.
 189 The argument object is not altered--the value is a copy."
 190   (if (stringp obj)
 191       (japanese-string-conversion obj 'japanese-hiragana-region)
 192     (or (get-char-code-property obj 'hiragana)
 193         obj)))
 194
 195 ;;;###autoload
 196 (defun japanese-hankaku (obj &optional ascii-only)
 197   "Convert argument to `hankaku' and return that.
 198 The argument may be a character or string.  The result has the same type.
 199 The argument object is not altered--the value is a copy.
 200 Optional argument ASCII-ONLY non-nil means to return only ASCII character."
 201   (if (stringp obj)
 202       (japanese-string-conversion obj 'japanese-hankaku-region ascii-only)
 203     (or (and (not ascii-only)
 204              (get-char-code-property obj 'jisx0201))
 205         (get-char-code-property obj 'ascii)
 206         obj)))
 207
 208 ;;;###autoload
 209 (defun japanese-zenkaku (obj)
 210   "Convert argument to `zenkaku' and return that.
 211 The argument may be a character or string.  The result has the same type.
 212 The argument object is not altered--the value is a copy."
 213   (if (stringp obj)
 214       (japanese-string-conversion obj 'japanese-zenkaku-region)
 215     (or (get-char-code-property obj 'jisx0208)
 216         obj)))
 217
 218 (defun japanese-replace-region (from to string)
 219   "Replace the region specified by FROM and TO to STRING."
 220   (goto-char from)
 221   (insert string)
 222   (delete-char (- to from)))
 223
 224 ;;;###autoload
 225 (defun japanese-katakana-region (from to &optional hankaku)
 226   "Convert Japanese `hiragana' chars in the region to `katakana' chars.
 227 Optional argument HANKAKU t means to convert to `hankaku katakana' character
 228 of which charset is `japanese-jisx0201-kana'."
 229   (interactive "r\nP")
 230   (save-restriction
 231     (narrow-to-region from to)
 232     (save-excursion
 233       (goto-char (point-min))
 234       (while (re-search-forward "\\cH\\|\\cK" nil t)
 235         (let* ((kana (preceding-char))
 236                (composition
 237                 (and (not hankaku)
 238                      (get-char-code-property kana 'kana-composition)))
 239                next slot)
 240           (if (and composition (setq slot (assq (following-char) composition)))
 241               (japanese-replace-region (match-beginning 0) (1+ (point))
 242                                        (cdr slot))
 243             (let ((kata (get-char-code-property
 244                          kana (if hankaku 'jisx0201 'katakana))))
 245               (if kata
 246                   (japanese-replace-region (match-beginning 0) (point)
 247                                            kata)))))))))
 248
 249
 250 ;;;###autoload
 251 (defun japanese-hiragana-region (from to)
 252   "Convert Japanese `katakana' chars in the region to `hiragana' chars."
 253   (interactive "r")
 254   (save-restriction
 255     (narrow-to-region from to)
 256     (save-excursion
 257       (goto-char (point-min))
 258       (while (re-search-forward "\\cK\\|\\ck" nil t)
 259         (let* ((kata (preceding-char))
 260                (composition (get-char-code-property kata 'kana-composition))
 261                next slot)
 262           (if (and composition (setq slot (assq (following-char) composition)))
 263               (japanese-replace-region (match-beginning 0) (1+ (point))
 264                                        (get-char-code-property
 265                                         (cdr slot) 'hiragana))
 266             (let ((hira (get-char-code-property kata 'hiragana)))
 267               (if hira
 268                   (japanese-replace-region (match-beginning 0) (point)
 269                                            hira)))))))))
 270
 271 ;;;###autoload
 272 (defun japanese-hankaku-region (from to &optional ascii-only)
 273   "Convert Japanese `zenkaku' chars in the region to `hankaku' chars.
 274 `Zenkaku' chars belong to `japanese-jisx0208'
 275 `Hankaku' chars belong to `ascii' or `japanese-jisx0201-kana'.
 276 Optional argument ASCII-ONLY non-nil means to convert only to ASCII char."
 277   (interactive "r\nP")
 278   (save-restriction
 279     (narrow-to-region from to)
 280     (save-excursion
 281       (goto-char (point-min))
 282       (while (re-search-forward "\\cj" nil t)
 283         (let* ((zenkaku (preceding-char))
 284                (hankaku (or (and (not ascii-only)
 285                                  (get-char-code-property zenkaku 'jisx0201))
 286                             (get-char-code-property zenkaku 'ascii))))
 287           (if hankaku
 288               (japanese-replace-region (match-beginning 0) (match-end 0)
 289                                        hankaku)))))))
 290
 291 ;;;###autoload
 292 (defun japanese-zenkaku-region (from to &optional katakana-only)
 293   "Convert hankaku' chars in the region to Japanese `zenkaku' chars.
 294 `Zenkaku' chars belong to `japanese-jisx0208'
 295 `Hankaku' chars belong to `ascii' or `japanese-jisx0201-kana'.
 296 Optional argument KATAKANA-ONLY non-nil means to convert only KATAKANA char."
 297   (interactive "r\nP")
 298   (save-restriction
 299     (narrow-to-region from to)
 300     (save-excursion
 301       (goto-char (point-min))
 302       (while (or (and katakana-only
 303                       (re-search-forward "\\ck" nil t))
 304                  (and (not katakana-only)
 305                       (re-search-forward "\\ca\\|\\ck" nil t)))
 306         (let* ((hankaku (preceding-char))
 307                (composition (get-char-code-property hankaku 'kana-composition))
 308                next slot)
 309           (if (and composition (setq slot (assq (following-char) composition)))
 310               (japanese-replace-region (match-beginning 0) (1+ (point))
 311                                        (cdr slot))
 312             (let ((zenkaku (japanese-zenkaku hankaku)))
 313               (if zenkaku
 314                   (japanese-replace-region (match-beginning 0) (match-end 0)
 315                                            zenkaku)))))))))
 316
 317 ;;;###autoload
 318 (defun read-hiragana-string (prompt &optional initial-input)
 319   "Read a Hiragana string from the minibuffer, prompting with string PROMPT.
 320 If non-nil, second arg INITIAL-INPUT is a string to insert before reading."
 321   (read-multilingual-string prompt initial-input "japanese-hiragana"))
 322
 323 ;;
 324 (provide 'japan-util)
 325
 326 ;;; arch-tag: b579595c-c9ad-4b57-9314-98cd8b214f89
 327 ;;; japan-util.el ends here