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% 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 25.1.17.1, p. III-334.
% Original source in file "macros5.TEX", starting line 1018.
\wlog{L: "compst.tip" ["macros5.TEX," l. 1018, p. III-334]}%
% This file DOES belong to format "texip."
\InputD{restring.tip}
\catcode`\@ = 11
\def\StringsEqualConditional #1#2{% 
    TT\fi
    \edef\@StringsEqualOneConditional{#1}% 
    \edef\@StringsEqualTwoConditional{#2}% 
    \ifx\@StringsEqualOneConditional\@StringsEqualTwoConditional
}
\def\EmptyStringConditional #1{%
    TT\fi
    \if\StringsEqualConditional{#1}{}%
}
\def\EmptyStringConditionalISpaces #1{%
    TT\fi
    \ReplaceSubStrings{\@EmptyStringConditionalISpaces}{#1}%
        { }{}%
    \if\EmptyStringConditional
        {\@EmptyStringConditionalISpaces}%
}
\catcode`\@ = 12