\ProvidesPackage{biolinum}[%
  2023/11/26 (Bob Tennent) Supports Biolinum fonts for all LaTeX engines.] 

\RequirePackage{ifxetex,ifluatex,xkeyval,textcomp}

\newif\iflibertine@otf
\ifxetex
  \libertine@otftrue
\else\ifluatex
  \libertine@otftrue
\else  % [pdf]LaTeX
  \libertine@otffalse
\fi\fi

\newif\iflibertine@sfdefault \libertine@sfdefaultfalse
\newif\ifbiolinum@lining \biolinum@liningtrue            % NEW
\newif\ifbiolinum@tabular \biolinum@tabulartrue          % NEW

\def\libertine@newfigdefaults{%
\PackageWarningNoLine{libertine}{%
  ****************************************\MessageBreak
   Figure defaults are now: lining, tabular; \MessageBreak
   for options, see the documentation. \MessageBreak
  ****************************************}
}
\DeclareOptionX{sfdefault}[true]{%
\@nameuse{if#1}\libertine@sfdefaulttrue\fi
}
\DeclareOptionX{type1}[true]{%
\@nameuse{if#1}\libertine@otffalse\fi
}
\DeclareOptionX{nofontspec}[true]{%
\@nameuse{if#1}\libertine@otffalse\fi
}
\DeclareOptionX{lining}[true]{%
\@nameuse{biolinum@lining#1}
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{nf}[true]{%
\@nameuse{biolinum@lining#1}
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{lf}[true]{%
\@nameuse{biolinum@lining#1}
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{oldstyle}[true]{%
\@nameuse{if#1}%
  \biolinum@liningfalse
\else
  \biolinum@liningtrue
\fi
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{osf}[true]{%
\@nameuse{if#1}%
  \biolinum@liningfalse
\else
  \biolinum@liningtrue
\ifbiolinum@lining\libertine@newfigdefaults\fi
\fi
}
\DeclareOptionX{sflining}[true]{%
\@nameuse{biolinum@lining#1}
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{sflf}[true]{%
\@nameuse{biolinum@lining#1}
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{sfoldstyle}[true]{%
\@nameuse{if#1}\biolinum@liningfalse\else\biolinum@liningtrue\fi
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{sfosf}[true]{%
\@nameuse{if#1}\biolinum@liningfalse\else\biolinum@liningtrue\fi
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{osfss}[true]{%
\@nameuse{if#1}\biolinum@liningfalse\else\biolinum@liningtrue\fi
\ifbiolinum@lining\libertine@newfigdefaults\fi
}
\DeclareOptionX{tabular}[true]{%
\@nameuse{biolinum@tabular#1}
\ifbiolinum@tabular\libertine@newfigdefaults\fi
}
\DeclareOptionX{t}[true]{%
\@nameuse{biolinum@tabular#1}
\ifbiolinum@tabular\libertine@newfigdefaults\fi
}
\DeclareOptionX{proportional}[true]{%
\@nameuse{if#1}%
  \biolinum@tabularfalse
\else
  \biolinum@tabulartrue
\fi
\ifbiolinum@tabular\libertine@newfigdefaults\fi
}
\DeclareOptionX{p}[true]{%
\@nameuse{if#1}%
  \biolinum@tabularfalse
\else
  \biolinum@tabulartrue
\fi
\ifbiolinum@tabular\libertine@newfigdefaults\fi
}
\DeclareOptionX{sftabular}[true]{%
\@nameuse{biolinum@tabular#1}
\ifbiolinum@tabular\libertine@newfigdefaults\fi
}
\DeclareOptionX{sft}[true]{%
\@nameuse{biolinum@tabular#1}
\ifbiolinum@tabular\libertine@newfigdefaults\fi
}
\DeclareOptionX{sfproportional}[true]{%
\@nameuse{if#1}%
  \biolinum@tabularfalse
\else
  \biolinum@tabulartrue
\fi
\ifbiolinum@tabular\libertine@newfigdefaults\fi
}
\DeclareOptionX{sfp}[true]{%
\@nameuse{if#1}%
  \biolinum@tabularfalse
\else
  \biolinum@tabulartrue
\fi
\ifbiolinum@tabular\libertine@newfigdefaults\fi
}

\newcommand*{\LinuxBiolinumT@scale}{1}
\DeclareOptionX{scaled}{\renewcommand*{\LinuxBiolinumT@scale}{#1}}
\DeclareOptionX{scale}{\renewcommand*{\LinuxBiolinumT@scale}{#1}}

\DeclareOptionX{defaultfeatures}{\def\libertine@defaultfeatures{#1}}
\def\libertine@defaultfeatures{}

\ProcessOptionsX\relax

\iflibertine@otf
  \ifbiolinum@lining
    \def\biolinum@figurestyle{}  % lnum feature missing in RB (and hence RBO)
  \else
    \def\biolinum@figurestyle{OldStyle}
  \fi
  \ifbiolinum@tabular
    \def\biolinum@figurealign{Monospaced} 
  \else
    \def\biolinum@figurealign{Proportional} 
  \fi

\else % type1

  \ifbiolinum@lining
    \def\biolinum@figurestyle{LF} 
  \else
    \def\biolinum@figurestyle{OsF} 
  \fi
  \ifbiolinum@tabular
    \def\biolinum@figurealign{T} 
  \else
    \def\biolinum@figurealign{} 
  \fi
\fi


\iflibertine@otf
  \RequirePackage{fontspec}
\else
  \RequirePackage{fontenc,fontaxes}
\fi

% Set sans fonts:

\iflibertine@otf

  \def\biolinum@base{LinBiolinum}
  \defaultfontfeatures{
     Ligatures = TeX ,
     Extension = .otf ,
     SmallCapsFeatures={Letters=SmallCaps} ,
     \libertine@defaultfeatures
  }
    \setsansfont
          [ Numbers   = {\biolinum@figurealign, \biolinum@figurestyle} ,
            Scale     = \LinuxBiolinumT@scale ,
            UprightFont    = *_R ,
            ItalicFont     = *_RI ,
            BoldFont       = *_RB , 
            BoldItalicFont = *_RBO , % oblique to fake italic
          ] {\biolinum@base}
    % grab the \sfdefault in case it changes subsequently:
    \let\biolinum@family\sfdefault
    \iflibertine@sfdefault\renewcommand*\familydefault{\biolinum@family}\fi
  \newfontfamily\biolinum
        [ Numbers   = {\biolinum@figurealign, \biolinum@figurestyle} ,
          Scale     = \LinuxBiolinumT@scale ,
          UprightFont    = *_R ,
          ItalicFont     = *_RI ,
          BoldFont       = *_RB , 
          BoldItalicFont = *_RBO,   % oblique to fake italic
        ] {\biolinum@base}
  \newfontfamily\biolinumOsF
        [ Numbers   = {\biolinum@figurealign, OldStyle} ,
          Scale     = \LinuxBiolinumT@scale ,
          UprightFont    = *_R ,
          ItalicFont     = *_RI ,
          BoldFont       = *_RB , 
          BoldItalicFont = *_RBO , % oblique to fake italic
        ] {\biolinum@base}
  \newfontfamily\biolinumLF
        [ Numbers   = {\biolinum@figurealign} , % lnum feature missing
          Scale     = \LinuxBiolinumT@scale ,
          UprightFont    = *_R ,
          ItalicFont     = *_RI ,
          BoldFont       = *_RB , 
          BoldItalicFont = *_RBO , % oblique to fake italic
        ] {\biolinum@base}
  \defaultfontfeatures{ Extension = .otf } % Don't want ligatures for keyboard
  \newfontface\biolinumkey{\biolinum@base _K}

  \providecommand\sufigures{\addfontfeatures{VerticalPosition=Superior}}

\else % type1

  \def\biolinum@family{LinuxBiolinumT-\biolinum@figurealign\biolinum@figurestyle}
  \def\sfdefault{\biolinum@family} 
  \iflibertine@sfdefault\edef\familydefault{\sfdefault}\fi

  \providecommand*\biolinum{\fontfamily{\biolinum@family}\selectfont}
  \providecommand*\biolinumOsF{\fontfamily{LinuxBiolinumT-\biolinum@figurealign OsF}\selectfont}
  \providecommand*\biolinumLF{\fontfamily{LinuxBiolinumT-\biolinum@figurealign LF}\selectfont}

  \fa@naming@exception{figures}{{superior}{proportional}}{Sup}
  \fa@naming@exception{figures}{{superior}{tabular}}{Sup}
  \def\sufigures{\@nomath\sufigures\fontfigurestyle{superior}\selectfont}

\fi
\DeclareTextFontCommand{\textsu}{\sufigures}
\let\textsuperior\textsu

% Define \oldstylenums[f] and \liningnums[f]

\iflibertine@otf
    \DeclareTextFontCommand{\oldstylenums}{\addfontfeatures{Numbers=OldStyle}}
    \DeclareTextFontCommand{\liningnums}{\addfontfeatures{Numbers=Lining}}
\else % type1
    % \oldstylenums defined by \textcomp?
    \DeclareTextFontCommand{\liningnums}{}
    \DeclareTextFontCommand{\oldstylenumsf}{\biolinumOsF}
    \DeclareTextFontCommand{\liningnumsf}{\biolinumLF}
\fi

% Define \tabularnums[f] and \proportionalnums[f]

\iflibertine@otf
    \DeclareTextFontCommand{\tabularnums}{\addfontfeatures{Numbers=Tabular}}
    \DeclareTextFontCommand{\proportionalnums}{\addfontfeatures{Numbers=Proportional}}
\else % type1
    \DeclareTextFontCommand{\tabularnumsf}{\fontfamily{LinuxBiolinumT-T\biolinum@figurestyle}\selectfont}
    \DeclareTextFontCommand{\proportionalnumsf}{\fontfamily{LinuxBiolinumT-\biolinum@figurestyle}\selectfont}
\fi

\iflibertine@otf
  \def\lib@fxb{LinBiolinum_R}
  \def\lib@fxk{LinBiolinum_K}

  \providecommand*\DeclareTextGlyphY[3]{%
      % \DeclareTextGlyphY{fxl}{s_t}{64262}
      % #1=basefont #2=glyphname, #3=position
      \def\lib@temp{#1}%
        \ifx\lib@temp\lib@fxb \@namedef{#1@#2}{{\biolinum\char#3\relax}}\else%
          \ifx\lib@temp\lib@fxk \@namedef{#1@#2}{{\biolinumkey\char#3\relax}}\else%
      \fi\fi}
  %
  \input{LinBiolinum_R}
  \input{LinBiolinum_K}
  %
  \DeclareRobustCommand*\biolinumGlyph[1]{\@nameuse{LinBiolinum_R@#1}}
  \DeclareRobustCommand*\biolinumKeyGlyph[1]{\@nameuse{LinBiolinum_K@#1}}
  \input{LKey}

\DeclareTextFontCommand{\textsup}{\sufigures}

\else %type1
  
\fi


\iflibertine@otf
% turn off defaults in case other fonts are selected:
  \defaultfontfeatures{}
\fi

\endinput