%
% keyvalx.sty
% by pts@fazekas.hu at Fri Jan 24 12:27:05 CET 2003
%
% Works with laemu.sty. Based on standard LaTeX keyval.sty.
%
\expandafter\ifx\csname ifLaTeX\endcsname\relax\input laemu.sty\relax\fi%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{keyvalx}
                 [1999/03/16 v1.13 key=value parser (DPC)]
\def\setkeys#1#2{%
  \def\KV@prefix{KV@#1@}%
  \let\@tempc\relax
  \KV@do#2,\relax,}
\def\KV@do#1,{%
 \ifx\relax#1\empty\else
  \KV@split#1==\relax
  \expandafter\KV@do\fi}
\def\KV@split#1=#2=#3\relax{%
  \KV@@sp@def\@tempa{#1}%
  \ifx\@tempa\@empty\else
    \expandafter\let\expandafter\@tempc
      \csname\KV@prefix\@tempa\endcsname
    \ifx\@tempc\relax
      \KV@errx
       {key \@tempa\space in \KV@prefix\space undefined}%
    \else
      \ifx\@empty#3\@empty
        \KV@default
      \else
        \KV@@sp@def\@tempb{#2}%
        \expandafter\@tempc\expandafter{\@tempb}\relax
      \fi
    \fi
  \fi}
\def\KV@default{%
  \expandafter\let\expandafter\@tempb
    \csname\KV@prefix\@tempa @default\endcsname
  \ifx\@tempb\relax
    \KV@err{No value specified for \@tempa}%
  \else
    \@tempb\relax
  \fi}

%**** pts ****
%\DeclareOption{unknownkeysallowed}{%
%  \def\KV@errx#1{\PackageInfo{keyval}{#1}}}
%\DeclareOption{unknownkeyserror}{%
%  \def\KV@errx#1{\PackageError{keyval}{#1}\@ehc}}
%\ExecuteOptions{unknownkeyserror}
%\let\KV@err\KV@errx
%\ProcessOptions
\def\KV@errx#1{\PackageError{keyval}{#1}\@ehc}%
\let\KV@err\KV@errx

\def\@tempa#1{%
\def\KV@@sp@def##1##2{%
  \futurelet\KV@tempa\KV@@sp@d##2\@nil\@nil#1\@nil\relax##1}%
\def\KV@@sp@d{%
  \ifx\KV@tempa\@sptoken
    \expandafter\KV@@sp@b
  \else
    \expandafter\KV@@sp@b\expandafter#1%
  \fi}%
\def\KV@@sp@b#1##1 \@nil{\KV@@sp@c##1}%
  }
\@tempa{ }
\def\KV@@sp@c#1\@nil#2\relax#3{\KV@toks@{#1}\edef#3{\the\KV@toks@}}
\newtoks\KV@toks@
\def\define@key#1#2{%
  \@ifnextchar[{\KV@def{#1}{#2}}{\@namedef{KV@#1@#2}####1}}
\def\KV@def#1#2[#3]{%
  \@namedef{KV@#1@#2@default\expandafter}\expandafter
    {\csname KV@#1@#2\endcsname{#3}}%
  \@namedef{KV@#1@#2}##1}
\endinput