% --------------------------------------------------------------------------------------------------
% subfile of pgf-PeriodicTable package ----------------------------------------------------------
% --------------------------------------------------------------------------------------------------
% Macro for loading pgf-PeriodicTable libraries --------------------------------------------------
% --------------------------------------------------------------------------------------------------
% --------------------------------------------------------------------------------------------------
% --------------------------------------------------------------------------------------------------
%
%
% Taken and adapted from pgf ---------------->
% Library files inclusion
% Include a library file.
%
% #1 = List of names of library file.
%
% Description:
%
% This command includes a list of library files. For each file X in the
% list, the file pgfPTlibrary.X.tex is included, provided this has
% not been done earlier.
%
% \usepgfPTlibrary{elements}
% \usepgflPTibrary[elements,plot]
%
\def\usepgfPTlibrary#1{\ignorespaces%
  \edef\pgfPT@list{#1}%
  \@for\pgfPT@temp:=\pgfPT@list\do{%
    \ifx\pgfPT@temp\@empty\relax%
    \else%
      \expandafter\ifx\csname pgfPT@library@\pgfPT@temp @loaded\endcsname\relax%
      \expandafter\let\csname pgfPT@library@\pgfPT@temp @loaded\endcsname=\@empty%
      \expandafter\edef\csname pgfPT@library@#1@atcode\endcsname{\the\catcode`\@}%
      \expandafter\edef\csname pgfPT@library@#1@barcode\endcsname{\the\catcode`\|}%
      \expandafter\edef\csname pgfPT@library@#1@dollarcode\endcsname{\the\catcode`\$}%
      \catcode`\@=11%
      \catcode`\|=12%
      \catcode`\$=3%
      \pgfutil@InputIfFileExists{pgfPT.library.\pgfPT@temp.tex}{}{%
          \PackageError{pgfPT}{I did not find the pgfPT library
            '\pgfPT@temp'. I looked for the file named
            pgfPTlibrary.\pgfPT@temp.tex, but could not find it in in
            the current texmf trees.}
        }%
      \catcode`\@=\csname pgfPT@library@#1@atcode\endcsname%
      \catcode`\|=\csname pgfPT@library@#1@barcode\endcsname%
      \catcode`\$=\csname pgfPT@library@#1@dollarcode\endcsname%
      \fi%
    \fi%
  }%
}%
% <---------------- Taken and adapted from pgf (pgfutil-common.tex)
\endinput
