% CSFONTS.TEX, ver. 2.1,  March 1996,    by Petr Olsak (Ol\v s\'ak)
%
% This file re-defines the TeX primitive \font by the following way.
%
% You write:                               The meaning:
%  \font\xxx=cmmi* .......................  the same        (math italic)
%  \font\xxx=cmsy* .......................  the same        (math symbols)
%  \font\xxx=cmbs* .......................  the same        (bold math symbols)
%  \font\xxx=cmex* .......................  the same        (math extension)
%  \font\xxx=cmte* .......................  the same        (math ext. tt)
%  \font\xxx=cm*   (no previous samples)    \font\xxx=cs*   (cm -> cs)
%  \font\xxx=*     (no previous samples)    the same        (no cm* fonts)
%  \font\preloaded=*[scaled \magstep?] .... ignore loading  %% ver. 2 feature

\ifx\transformfont\undefined \else \expandafter\endinput \fi

\catcode`\{=1 % left brace is begin-group character
\catcode`\}=2 % right brace is end-group character
\catcode`\#=6 % hash mark is macro parameter character

\def\transformfont#1#2#3#4#5 {%
  \if#1c%
    \if#2m%
      \if#3m%
        \if#4i%
          cmmi#5
        \else
          csm#4#5
        \fi
      \else
        \if#3b%
          \if#4s%
            cmbs#5
          \else
            csb#4#5
          \fi
        \else
          \if#3s%
            \if#4y%
              cmsy#5
            \else
              css#4#5
            \fi
          \else
            \if#3e%
              \if#4x%
                cmex#5
              \else
                cse#4#5
              \fi
            \else
              \if#3t%
                \if#4e%
                  cmte#5
                \else
                  cst#4#5
                \fi
              \else
                cs#3#4#5
              \fi
            \fi
          \fi
        \fi
      \fi
    \else
      c#2#3#4#5
    \fi
  \else
    #1#2#3#4#5
  \fi}

\let\originalfont\font
\edef\tempb{\string\preloaded}
\def\font#1=#2 {\edef\tempa{\string#1}%
  \ifx\tempa\tempb\let\next=\ignoreload
  \else \def\next{\originalfont#1=\transformfont#2 }%
  \fi\next}
\long\def\ignoreload#1{\ifx#1s\let\next=\skipscaled
     \else\long\def\next{#1}\fi\next}
\def\skipscaled #1\magstep#2{}
\def\restorefont{\let\font\originalfont  \let\originalfont\undefined
  \let\transformfont\undefined \let\restorefont\undefined}

% end of file CSFONTS.TEX