% 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 15.2.6, p. II-237.
% Original source in file "fonts1.TEX", starting line 538.
\wlog{L: "strleng.tip" ["fonts1.TEX," l. 538, p. II-237]}%
% This file DOES belong to format "texip."
\newcount\StringLengthResult
\catcode`\@ = 11
\newbox\@StringLengthBoxA
\newbox\@StringLengthBoxB
\def\StringLength #1{% 
    \setbox\@StringLengthBoxA = \hbox{\tt #1}% 
    \setbox\@StringLengthBoxB = \hbox{\tt A}% 
    \StringLengthResult = \wd\@StringLengthBoxA
    \divide\StringLengthResult by \wd\@StringLengthBoxB
}
\catcode`\@ = 12