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% zhmath.sty coded by YIN Dian
% Use basic CJK characters in math environment.
% Hist: 071202 First coded.
% 071204 Set \XeTeXinterchartokenstate=0 to avoid a XeTeX bug.
% Added \ProvidesPackage.
% 071210 Added another method to set Chinese math fonts in
% LaTeX, via option noactive. Improved format detection.
% Added ability to set alpha and number fonts.
% 071211 Put \setalphanummathfonts in preamble so that
% \usecustommathfonts can be used in document in LaTeX.
% Changed \hbox to \mbox. Changed default option to
% noactive.
% 071215 Removed \XeTeXinterchartokenstate=0, as the XeTeX bug
% is fixed by JK. Changed \mathcjksizec/d to fit the
% main text size.
% 071229 Added \XeTeXinterchartokenstate=0 again, because not
% everyone has the latest version of XeTeX. Added custom
% and nocustom options.
% 2016/02/10 Improved \@setzhmathfonts.
\catcode`\@=11
\ifx\zhmath@defined\@undefined
\def\zhmath@defined{\relax}
\def\filedate{2007/12/29}
\ifx\zhspacingrevision\@undefined
\input zhspacing.sty
\fi
\def\zhmath@setXeTeXmathcodefam#1#2#3{%
% set #1..#2's math family to #3
\count@=#1%
\loop
\XeTeXmathcode\count@=7 #3 \count@
\unless\ifnum\count@>#2%
\advance\count@ by 1
\repeat
}
\def\zhmath@setactivemathchar#1#2#3#4#5#6{%
% set #1..#2 to active math chars, executing \mathchoice #3 #4 #5 #6.
\count@=#1%
\loop
\mathcode\count@="8000
{\catcode\count@=\active\lccode`\~=\count@
\lowercase{\xdef~{{\mathchoice{\noexpand#3{\number\count@}}%
{\noexpand#4{\number\count@}}{\noexpand#5{\number\count@}}
{\noexpand#6{\number\count@}}}}}%
}%
\unless\ifnum\count@>#2%
\advance\count@ by 1
\repeat
}
\newif\ifzhmath@active
\newif\ifzhmath@custom
\ifLaTeX@e % in LaTeX, similar to mathcjk
\ProvidesPackage{zhmath}[\filedate]
\DeclareOption{active}{\zhmath@activetrue}
\DeclareOption{noactive}{\zhmath@activefalse}
\DeclareOption{custom}{\zhmath@customtrue}
\DeclareOption{nocustom}{\zhmath@customfalse}
\zhmath@activefalse
\zhmath@customtrue
\ProcessOptions\relax
\def\mathcjksizea{}
\def\mathcjksizeb{}
\def\mathcjksizec{\dimen@=\dimexpr\f@size pt*6/10\relax\fontsize{\dimen@}{\dimen@}}
\def\mathcjksized{\dimen@=\dimexpr\f@size pt*5/10\relax\fontsize{\dimen@}{\dimen@}}
\@ifundefined{zhmathfont}{\newfontfamily\zhmathfont{SimSun}}{}
\ifzhmath@active
\def\zhmath@zhfont@disp#1{{\mbox{\XeTeXinterchartokenstate=0\zhmathfont\mathcjksizea\char#1\relax}}}
\def\zhmath@zhfont@text#1{{\mbox{\XeTeXinterchartokenstate=0\zhmathfont\mathcjksizeb\char#1\relax}}}
\def\zhmath@zhfont@scrp#1{{\mbox{\XeTeXinterchartokenstate=0\zhmathfont\mathcjksizec\char#1\relax}}}
\def\zhmath@zhfont@subs#1{{\mbox{\XeTeXinterchartokenstate=0\zhmathfont\mathcjksized\char#1\relax}}}
\zhmath@setactivemathchar{"2E80}{"9FFF}{\zhmath@zhfont@disp}%
{\zhmath@zhfont@text}{\zhmath@zhfont@scrp}{\zhmath@zhfont@subs}
\def\setzhmathfont#1{\let\zhmathfont=#1}
\else
\def\setzhmathfont#1{%
\let\zhmathfont=#1%
\begingroup
\normalfont
\zhmathfont
\xdef\zhmath@fenc{\f@encoding}%
\xdef\zhmath@ffam{\f@family}%
\endgroup
\DeclareSymbolFont{hanzi}{\zhmath@fenc}{\zhmath@ffam}{m}{n}%
}
\setzhmathfont\zhmathfont
\zhmath@setXeTeXmathcodefam{"2E80}{"9FFF}{\symhanzi}
\fi
\ifzhmath@custom
\def\setalphanummathfonts#1{%
\let\zhmathalphanumfont=#1%
\begingroup
\normalfont
\zhmathalphanumfont
\xdef\zhmath@@fenc{\f@encoding}%
\xdef\zhmath@@ffam{\f@family}%
\endgroup
\DeclareSymbolFont{@letter}{\zhmath@@fenc}{\zhmath@@ffam}{m}{it}%
\DeclareSymbolFont{@number}{\zhmath@@fenc}{\zhmath@@ffam}{m}{n}%
\SetSymbolFont{@letter}{bold}{\zhmath@@fenc}{\zhmath@@ffam}{bx}{it}%
\SetSymbolFont{@number}{bold}{\zhmath@@fenc}{\zhmath@@ffam}{bx}{n}%
}
\@ifundefined{zhmathalphanumfont}{\newfontfamily\zhmathalphanumfont{Times New Roman}}{}
\setalphanummathfonts\zhmathalphanumfont
\def\usecustommathfonts{%
\zhmath@setXeTeXmathcodefam{`\0}{`\9}{\sym@number}
\zhmath@setXeTeXmathcodefam{`\a}{`\z}{\sym@letter}
\zhmath@setXeTeXmathcodefam{`\A}{`\Z}{\sym@letter}
}
\fi
\else %in plain TeX
\@ifundefined{zhmathfont}{\font\zhmathfont="SimSun" at 10pt}{}
\newfam\zhmath@fam
\newfam\zhmath@letterfam
\newfam\zhmath@numberfam
\begingroup
\catcode`\A=12 %
\catcode`\P=12 %
\catcode`\T=12 %
\lowercase{\endgroup
\def\@setzhmathfonts#1#2{%
\expandafter\@setzhmathfonts@auxi\fontname#1 AT PT\relax#2}
\def\@setzhmathfonts@auxi #1 AT #2PT#3\relax#4{%
\ifx\relax#2\relax
\@setzhmathfonts@auxii#4{#1}{10pt}%
\else
\@setzhmathfonts@auxii#4{#1}{#2pt}%
\fi}%
}
\def\@setzhmathfonts@auxii#1#2#3{%
\font\zhmath@textfont=#2 at #3 \relax
\font\zhmath@scriptfont=#2 at .7\dimexpr#3\relax\relax
\font\zhmath@scriptscriptfont=#2 at .5\dimexpr#3\relax\relax
\textfont#1=\zhmath@textfont
\scriptfont#1=\zhmath@scriptfont
\scriptscriptfont#1=\zhmath@scriptscriptfont}
\def\setzhmathfont#1{\@setzhmathfonts{#1}\zhmath@fam}
\setzhmathfont\zhmathfont
\def\setalphanummathfonts#1#2{% #1: alpha, #2, num
\@setzhmathfonts{#1}\zhmath@letterfam
\@setzhmathfonts{#2}\zhmath@numberfam
}
\zhmath@setXeTeXmathcodefam{"2E80}{"9FFF}{\zhmath@fam}
\def\usecustommathfonts{%
\@ifundefined{zhmathletterfont}{\font\zhmathletterfont="Times New Roman/I" at 10pt}{}
\@ifundefined{zhmathnumberfont}{\font\zhmathnumberfont="Times New Roman" at 10pt}{}
\setalphanummathfonts\zhmathletterfont\zhmathnumberfont
\zhmath@setXeTeXmathcodefam{`\0}{`\9}{\zhmath@numberfam}
\zhmath@setXeTeXmathcodefam{`\a}{`\z}{\zhmath@letterfam}
\zhmath@setXeTeXmathcodefam{`\A}{`\Z}{\zhmath@letterfam}
}
\fi % end if LaTeX
\fi
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