% 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

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