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% xetexko-josa.sty
%
% Copyright (c) 2013-2019 Dohyun Kim  <nomos at ktug org>
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
%  http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2006/05/20 or later.

\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname ProvidesPackage\endcsname\relax\else
  \ProvidesPackage{xetexko-josa}[2019/12/01 v2.22 Auto-josa for XeTeX-ko]
\fi

\unless\ifcsname @tempcnta\endcsname
  \alloc@0\count\countdef\insc@unt\@tempcnta\fi
\unless\ifcsname @tempcntb\endcsname
  \alloc@0\count\countdef\insc@unt\@tempcntb\fi

%%% user commands
\protected\def\jong {\global\let\XK@last@char=0}
\protected\def\rieul{\global\let\XK@last@char=1}
\protected\def\jung {\global\let\XK@last@char=2}


\newcount\@josa
\def\@jong {\global\@josa\z@ }
\def\@rieul{\global\@josa\@ne}
\def\@jung {\global\@josa\tw@}
\@jung

\begingroup
\catcode`\A=11
\catcode`\0=12
\global\let\dhucs@cat@eleven=A
\global\let\dhucs@cat@twelve=0
\endgroup

\expandafter\def\expandafter\strip@characternum@meaning@prefix\detokenize
  {the character} #1#2\end{\number`#1\relax}
\expandafter\def\expandafter\strip@letternum@meaning@prefix\detokenize
  {the letter} #1#2\end{\number`#1\relax}

\def\@josa@char@to@number#1#2{%
  \ifcat#1\dhucs@cat@eleven
    \expandafter\expandafter\expandafter#2\expandafter
    \strip@letternum@meaning@prefix\meaning#1\end
  \else\ifcat#1\dhucs@cat@twelve
    \expandafter\expandafter\expandafter#2\expandafter
    \strip@characternum@meaning@prefix\meaning#1\end
  \else
    #2\z@
  \fi\fi
}

\def\josa@char@to@number{%
  \XeTeXinterchartokenstate\z@
  \@josa@char@to@number\XK@last@char\count@
  \@josa@char@to@number\XK@lastlast@char\@tempcnta
  \@josa@char@to@number\XK@lastlastlast@char\@tempcntb
  \ifnum\count@="302E
    \count@\@tempcnta \@tempcnta\@tempcntb
  \else\ifnum\count@="302F
    \count@\@tempcnta \@tempcnta\@tempcntb
  \else\ifnum\count@="1160
    \count@\@tempcnta \@tempcnta\@tempcntb
  \fi\fi\fi
  \XeTeXinterchartokenstate\@ne
}

\def\josa@last@char@latin{%
  \ifnum  49=\count@ \@rieul\else % 1
  \ifnum  51=\count@ \@jong \else % 3
  \ifnum  54=\count@ \@jong \else % 6
  \ifnum  55=\count@ \@rieul\else % 7
  \ifnum  56=\count@ \@rieul\else % 8
  \ifnum  48=\count@ \@jong \else % 0
  \ifnum 108=\count@ \@rieul\else % l
  \ifnum 109=\count@ \@jong \else % m
  \ifnum 110=\count@ \@jong \else % n
  \ifnum  76=\count@ \@rieul\else % L
  \ifnum  77=\count@ \@jong \else % M
  \ifnum  78=\count@ \@jong \else % N
    \@jung
  \fi\fi\fi\fi\fi \fi\fi\fi\fi\fi \fi\fi
  \ifnum 110=\@tempcnta \ifnum 103=\count@ \@jong \fi\fi %skati-ng
  \ifnum  97=\@tempcnta \ifnum 112=\count@ \@jong \fi\fi %c-ap
  \ifnum 117=\@tempcnta \ifnum 112=\count@ \@jong \fi\fi %c-up
  \ifnum  97=\@tempcnta \ifnum 116=\count@ \@jong \fi\fi %c-at
  \ifnum 101=\@tempcnta \ifnum 116=\count@ \@jong \fi\fi %Haml-et
  \ifnum 105=\@tempcnta \ifnum 116=\count@ \@jong \fi\fi %summ-it
  \ifnum 111=\@tempcnta \ifnum 116=\count@ \@jong \fi\fi %n-ot
  \ifnum 117=\@tempcnta \ifnum 116=\count@ \@jong \fi\fi %n-ut
  \ifnum 111=\@tempcnta \ifnum 107=\count@ \@jong \fi\fi %bo-ok
  \ifnum 105=\@tempcnta \ifnum  99=\count@ \@jong \fi\fi %picn-ic
  \ifnum 108=\@tempcnta \ifnum 101=\count@ \@rieul\fi\fi %app-le
  \ifnum 105=\@tempcntb \ifnum 109=\@tempcnta \ifnum 101=\count@ \@jong\fi\fi\fi %t-ime
  \ifnum 105=\@tempcntb \ifnum 110=\@tempcnta \ifnum 101=\count@ \@jong\fi\fi\fi %m-ine
  \ifnum  97=\@tempcntb \ifnum  99=\@tempcnta \ifnum 107=\count@ \@jong\fi\fi\fi %b-ack
  \ifnum 105=\@tempcntb \ifnum  99=\@tempcnta \ifnum 107=\count@ \@jong\fi\fi\fi %p-ick
  \ifnum 111=\@tempcntb \ifnum  97=\@tempcnta \ifnum 116=\count@ \@jung\fi\fi\fi %b-oat
  \ifnum  84=\@tempcntb \ifnum  69=\@tempcnta \ifnum  88=\count@ \@jong\fi\fi\fi %TEX
}

\def\josa@hanja@hangul#1{%
  \begingroup
  \count@=\z@
  \openin1=#1\relax \josa@hanja \closein1
  \endgroup
}
\def\josa@hanja{%
  \read1 to \@tempa
  \ifnum\count@=\@josa
    \global\@josa\@tempa \let\next\relax
  \else
    \advance\count@\@ne \let\next\josa@hanja
  \fi
  \next
}

\def\num@josa#1{%
  \bgroup
  \count@#1%
  \ifnum\count@<\z@ \count@-\count@ \fi
  \count\tw@\count@
  \divide\count\tw@ 10
  \multiply\count\tw@ 10
  \advance\count@-\count\tw@
  \ifcase\count@\@jong\or\@rieul\or\@jung\or\@jong\or\@jung\or
    \@jung\or\@jong\or\@rieul\or\@rieul\or\@jung\fi
  \egroup
}

\def\josa@last@char@cjk{%
  \ifnum\@josa>19967 \ifnum\@josa<40870 % cjk unified ideographs
    \advance\@josa-19968 % "4E00
    \josa@hanja@hangul{hanja_hangul.tab}\fi\fi
  \ifnum\@josa>13311 \ifnum\@josa<19894 % cjk unified ideographs ext. A
    \advance\@josa-13312 % "3400
    \josa@hanja@hangul{hanjaexa_hangul.tab}\fi\fi
  \ifnum\@josa>63743 \ifnum\@josa<64046 % cjk compatibility ideographs
    \advance\@josa-63744 % "F900
    \josa@hanja@hangul{hanjacom_hangul.tab}\fi\fi
  \ifnum\@josa>44031 \ifnum\@josa<55204 % hangul syllables
    \advance\@josa-44032 % "AC00
    \count@=\@josa \divide\count@28 \multiply\count@28
    \advance\@josa-\count@ \advance\@josa4519 % "11A7
    \fi\fi
  \ifnum\@josa>"115F \ifnum\@josa<"11A8 % jamo vowels
    \ifnum\@josa="1160 \ifnum\@tempcnta="1105 \@rieul \else \@jong \fi % ㄹ or other chosong
    \else \@jung \fi\fi\fi
  \ifnum\@josa>"11A7 \ifnum\@josa<"1200 % jamo final consonants
    \ifnum\@josa="11AF \@rieul \else \@jong \fi\fi\fi
  \ifnum\@josa>"D7AF \ifnum\@josa<"D7C7 \@jung \fi\fi % jamo vowels
  \ifnum\@josa>"D7CA \ifnum\@josa<"D7FC \@jong \fi\fi % jamo final consonants
  \ifnum\@josa>12592 \ifnum\@josa<12623 % ㄱㄴㄷㄹ
    \ifnum\@josa=12601 \@rieul
    \else\@jong\fi \fi\fi
  \ifnum\@josa>12895 \ifnum\@josa<12924 \advance\@josa-96 \fi\fi
  \ifnum\@josa>12799 \ifnum\@josa<12814 % ㉠ or ㈀
    \ifnum\@josa=12803 \@rieul
    \else\@jong\fi \fi\fi
  \ifnum\@josa>12813 \ifnum\@josa<12829 % ㉮ or ㈎
    \@jung \fi\fi
  \ifnum\@josa>9311 \ifnum\@josa<9372 % ① or ⑴
    \advance\@josa\m@ne \num@josa{\@josa}\fi\fi
  \ifnum\@josa>9423 \ifnum\@josa<9450 \advance\@josa-26 \fi\fi
  \ifnum\@josa>9397 \ifnum\@josa<9424 \advance\@josa-26 \fi\fi
  \ifnum\@josa>9371 \ifnum\@josa<9398 % ⓐ or ⒜
    \ifnum\@josa=9383 \@rieul\else % l
    \ifnum\@josa=9384 \@jong\else  % m
    \ifnum\@josa=9385 \@jong\else  % n
    \@jung\fi\fi\fi \fi\fi
  \ifnum\@josa>8543 \ifnum\@josa<8556 % ⅰ ⅱ ⅲ
    \advance\@josa-3 \num@josa{\@josa}\fi\fi
  \ifnum\@josa>8559 \ifnum\@josa<8572 % Ⅰ Ⅱ Ⅲ
    \advance\@josa\@ne \num@josa{\@josa}\fi\fi
}

\protected\def\makejosa#1#2{%
  \josa@char@to@number
  \ifnum\count@<\@cclvi
    \ifnum\lastskip>\z@\else\XKcjklatinsmallbreak\fi % probably last char is latin ㅠㅠ
    \josa@last@char@latin
  \else
    \@josa\count@
    \josa@last@char@cjk
  \fi
  \ifcase\@josa #2% jong
  \or \ifx\@empty#1\@empty \else#2\fi% rieul
  \else #1% jung
  \fi
}

\def\가{\makejosa{가}{이}}
\def\이{\futurelet\dhucs@next\makejosa@I}
\def\은{\makejosa{는}{은}}
\def\는{\makejosa{는}{은}}
\def\을{\makejosa{를}{을}}
\def\를{\makejosa{를}{을}}
\def\와{\makejosa{와}{과}}
\def\과{\makejosa{와}{과}}
\def\으{\makejosa{}{으}}
\def\로{\makejosa{}{으}로}
\def\라{\makejosa{라}{이라}}
\def\makejosa@I{%
  \ifcat\dhucs@next\dhucs@cat@twelve
    \expandafter\expandafter\expandafter\count@\expandafter
    \strip@characternum@meaning@prefix\meaning\dhucs@next\end
    \ifnum 0\ifnum\count@>"ABFF \ifnum\count@<"D7A4 1\fi\fi>\z@
      \makejosa\relax{이}%
    \else
      \makejosa{가}{이}%
    \fi
  \else
    \makejosa{가}{이}%
  \fi
}

\endinput