%%
%% This is file `ifoption.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% ifoption.dtx 
%% 
%%% ====================================================================
%%% @LaTeX-doc-source-file{
%%%   filename  = "ifoption.dtx",
%%%   version   = "1.02",
%%%   date      = "2002/03/04",
%%%   time      = "16:33:16 EST",
%%%   author    = "Michael J Downes",
%%%   address   = "American Mathematical Society,
%%%                Publications Technical Group,
%%%                PO Box 6248,
%%%                Providence, RI 02940,
%%%                USA",
%%%   email     = "tech-support@ams.org",
%%%   URL       = "http://www.ams.org/",
%%%   abstract  = "",
%%%   checksum  = "06695 170 563 5432",
%%%   docstring = "The checksum field, produced by Robert Solovay's
%%%                checksum utility, gives CRC-16 checksum, lines,
%%%                words, and characters.",
%%%  }
%%% ====================================================================
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{ifoption}[2002/03/04 v1.02]
\let\@xp\expandafter \let\@nx\noexpand
\def\@True{00}
\def\@False{01}
\def\CurrentPackage{\@currname}
\let\CurrentClass\CurrentPackage
\newcommand{\IfOption}{}
\def\IfPackageOption{\@ifpackagewith}
\def\IfClassOption{\@ifclasswith}
\def\IfOption{%
  \ifx\@currext\@pkgextension \@xp\IfPackageOption
  \else \@xp\IfClassOption
  \fi
  \@currname
}
\newcommand{\DeclareExclusiveOptions}[1]{%
  \xdef\@declaredoptions{\@declaredoptions,#1}%
  \gdef\ProcessExclusiveOptions{\relax}%
  \@for\CurrOption:=#1\do{%
    \@xp\deo@a\csname ds@\CurrOption\@xp\endcsname\@xp{\CurrOption}{#1}%
  }%
}
\def\DeclareBooleanOption{\DeclareExclusiveOptions}
\def\deo@a#1#2#3{%
  \def#1{%
    \g@addto@macro\ProcessExclusiveOptions{\OptionsFalseTrue{#3}{#2}}%
  }%
}
\def\cull@options#1,{%
  \@xp\ifx\csname ds@#1\@gobble\@percentchar\@empty\endcsname\@False
  \else #1,\fi
  \cull@options
}

\newcommand{\OptionsFalseTrue}[2]{%
  \begingroup
  \@for\CurrentOption:=#1\do{%
    \@xp\let\csname ds@\CurrentOption\endcsname\@False
  }%
  \let\ds@\@False
  \@xp\xdef\csname opt@\@currname.\@currext\endcsname{%
    \@xp\@xp\@xp\cull@options\csname opt@\@currname.\@currext\endcsname
      ,\@firstoftwo\@firstoftwo,#2%
  }%
  \endgroup
}
\endinput
%%
%% End of file `ifoption.sty'.
