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- % ttbar.tex
-
-
- % Lifted from TUGBOT.STY.
- %
- % Support verbatim listing of TeX source, as defined in TeXbook, p. 421;
- % lifted from MANMAC.TEX, and modified slightly for narrower columns.
-
- \chardef\other=12
- \def\ttverbatim{\begingroup \catcode`\\=\other
- \catcode`\{=\other \catcode`\}=\other \catcode`\$=\other
- \catcode`\&=\other \catcode`\#=\other \catcode`\%=\other
- \catcode`\~=\other \catcode`\_=\other \catcode`\^=\other
- \catcode`\"=\other
- \obeyspaces \obeylines \tt}
-
- \newskip\ttglue
- {\tenpoint\tt \global\ttglue=.5em plus .25em minus .15em}
- % this should be installed in each font
-
- % From David Eppstein's ``Trees'' paper (6#1), preserve initial spaces.
- {\obeyspaces\gdef {\ifvmode\indent\fi\space}}
-
- \newdimen\ttrightskip
- \ttrightskip=5pc
-
- \newif\ifttVertChar \ttVertCharfalse
- {\catcode`\|=\active \gdef\VertChar{\def|{\char"7C }}}
-
- %\outer\def\begintt{$$\let\par=\endgraf \ttverbatim \parskip=\z@
- \outer\def\begintt{$$\def\par{\leavevmode\null\endgraf}\ttverbatim \parskip=\z@
- \ifttVertChar \VertChar \global\ttVertCharfalse \else \catcode`\|=0 \fi
- \catcode`\|=0 \rightskip=-\ttrightskip \ttfinish}
- {\catcode`\|=0 |catcode`|\=\other % | is temporary escape character
- |obeylines % end of line is active
- |gdef|ttfinish#1^^M#2\endtt{#1|vbox{#2}|endgroup$$}}
-
- % Other non-tt elements that may be embedded within \begintt...\endtt .
- \def\MTH{$}
- \def\sb{_}
- \def\sp{^}
- \def\SP{{\tt\char"20 }} % "visible" space
- \chardef\bs=`\\
- \def\vrt{{\tt\char`\|}}
-
- \catcode`\|=\active
- %{\obeylines \gdef|{\ttverbatim \spaceskip\ttglue \let^^M=\ \let|=\endgroup}}
- {\obeylines \gdef\activatettbar{\global\catcode`\|=\active %
- \gdef|{\ttverbatim \spaceskip\ttglue \xspaceskip\ttglue %
- \let^^M=\ \let|=\endgroup}}}
- \activatettbar
-
- % The active | (which here implements verbatim mode) is redefined in
- % such headers as TABLES.TeX and must be able to be reinstated.
- % \activatettbar been tested with TABLES.TeX, and the two uses are
- % mutually operable (TUGboat 7#2, "Tables in INRSTeX").
-