% This macro source file is from the four volume series
% "TeX in Practice" by Stephan von Bechtolsheim, published
% 1993 by Springer-Verlag, New York.
% Copyright 1993 Stephan von Bechtolsheim.
% No warranty or liability is assumed.
% This macro may be copied freely if no fees other than
% media cost or shipping charges are charged and as long
% as this copyright and the following source code itself
% is not changed. Please see the series for further information.
%
% Version: 1.0
% Date: May 1, 1993
%
%
% This source code is documented in 27.1.4.1, p. III-404.
% Original source in file "macros7.TEX", starting line 400.
\wlog{L: "hex.tip" ["macros7.TEX," l. 400, p. III-404]}%
% This file DOES belong to format "texip."
\def\Hex #1{%
    {%
        \count0 = #1%
        \count1 = #1%
        \divide\count0 by 16
        \count2 = \count0
        \multiply \count2 by -16
        \advance \count1 by \count2
        \ifnum \count0 > 0
            \Hex{\count0}%
        \fi
        \HexDigit{\count1}% 
    }%
}
\def\HexDigit #1{% 
    {%
        \count0 = #1\relax
        \ifnum \count0 < 10
            \number\count0          % or \the\count0
        \else
            \advance\count0 by -10
            \advance\count0 by `A
            \char\count0
        \fi
    }%
}