% 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 29.3.2, p. III-506.
% Original source in file "io2.TEX", starting line 973.
\wlog{L: "verbwr.tip" ["io2.TEX," l. 973, p. III-506]}%
% This file DOES belong to format "texip."
\InputD{verb-bas.tip}
\InputD{futlet.tip}
\InputD{genaeol.tip}
\InputD{futlet.tip}
\InputD{gobblemo.tip}
\InputD{cstostrc.tip}
\catcode`\@ = 11
\newif\if@VerbFirstLineSuppress
\def\OpenVerbWrFile #1#2#3{%
    \immediate\openout #3 = #1.#2
    \wlog{\string\OpenVerbWrFile: opened "#1.#2" for
        literal writing.}%
}
\def\CloseVerbWrFile #1{%
    \immediate\closeout #1
    \wlog{\string\CloseVerbWrFile: closed file for literal writing.}%
}
\def\BeginVerbWr #1#2{%
    \begingroup
    \def\@VerbWrStream{#1}%
    \CSToStringCat{\@EndVerbWrSt}{#2}%
    \wlog{\string\BeginVerbWr: begin}% 
    \MkOthers
    \MakeEolActive
    \@VerbWrTabHandling
    \@VerbFirstLineSuppresstrue
    \expandafter\expandafter\expandafter
        \@BeginVerbWrY\expandafter{\@EndVerbWrSt}%
}
{
    \catcode `| = 0
    \catcode`\\ =12
    |gdef|@BeginVerbWrY #1{%
        |def|@BeginVerbWrX ##1\#1{%
            |@BeginVerbWr ##1% 
            |@VerbWrDoneToken
            |@VerbWrDone
        }
        |@BeginVerbWrX
    }
}
\def\@VerbWrTabHandling{%
    \MakeTabActive
    \@VerbWrTabHandlingOne
}
{\MakeTabActive
\gdef\@VerbWrTabHandlingOne{\def^^I{\@TabAsLiteral}}% 
}
\def\@BeginVerbWr{% 
    \DoFutureLet{\ifx}% 
        {\@VerbWrDoneToken}% 
        {\GobbleDoMore
            {\@VerbWrDoneToken}{\relax}}%
        {\@BeginVerbWrTwo}% 
}
\GenAeol{\@BeginVerbWrTwo}{%
    \if@VerbFirstLineSuppress
        \@VerbFirstLineSuppressfalse
    \else
        \immediate\write\@VerbWrStream{#1}%
    \fi
    \@BeginVerbWr
}
\def\@VerbWrDone{% 
    \endgroup
    \wlog{\string\@VerbWrDone: done}%
}
\catcode`\@ = 12