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% standard macros for CWEB listings (in addition to plain.tex)
% Version 2.4 --- Don Knuth, June 1992
% Version 2.4 [p5] --- Hans-Hermann Bode, July 1992
% Version 2.7 --- Don Knuth, July 1992
% Version 2.7 [p6] --- Hans-Hermann Bode, September 1992
% Version 2.8 --- Don Knuth, September 1992
% Version 2.8 [p7] --- Andreas Scherer, October 1993
% Version 3.0 --- Don Knuth, June 1993
% Version 3.0 [p8c] --- Hans-Hermann Bode, June 1993
% Version 3.0 [p8d] --- Andreas Scherer, October 1993
% Version 3.0 [p8e] --- Andreas Scherer, November 1993
% Version 3.1 [p9b] --- Andreas Scherer, January 1994
% Version 3.1 [p9c] --- Andreas Scherer, June 1994
% Version 3.2 [p10] --- Andreas Scherer, September 1994
% Version 3.3 [p11] --- Andreas Scherer, December 1994
% Version 3.3 [p11a] --- Andreas Scherer, January 1995
% Version 3.3 [p11b] --- Andreas Scherer, March 1995
% Version 3.4 [p13] --- Andreas Scherer, May 1996
% Version 3.4 [p14] --- Andreas Scherer, March 1997
% Version 3.42 [p15] --- Andreas Scherer, August 1998
% Version 3.43 [p16] --- Andreas Scherer, October 1998
% Version 3.5 [p17] --- Andreas Scherer, December 1999
% Version 3.61 [p18] --- Andreas Scherer, July 2000
% Version 3.63 [p19] --- Andreas Scherer, January 2001
% Version 3.64 [p20] --- Andreas Scherer, March 2002
% Version 3.64 [p21] --- Andreas Scherer, Octobre 2005
% Version 3.64 [2018] --- Andreas Scherer, Octobre 2018

\ifx\undefined\botofcontents\input cwebmac.tex\fi

\xdef\fmtversion{\fmtversion[2018]}

\def\Cpp{\CPLUSPLUS/} % for backward compatibility

\font\tenss=cmss10 \let\cmntfont\tenss % comment font

\def\C#1{\5\5\quad$\triangleright\,${\cmntfont#1}$\,\triangleleft$}
\def\SHC#1{\5\5\quad$\diamond\,${\cmntfont#1}}

%\let\K=\leftarrow % "honest" alternative to standard assignment operator

% Move contents page to the front
%
% Code from knuth.drv in https://github.com/oberdiek/latex-tds
% Works with pdftex (with active links) and xetex (with active
% links only for '\let\pdf+').
%
\ifx\detokenize\undefined\endinput\fi
\newread\testread
\openin\testread=\contentsfile\relax
\ifeof\testread % First run
\else % Second run
  \let\ORGcon\con
  \def\con{%
    \begingroup
      \let\end\relax
      \ORGcon
    \endgroup
    \let\con\end
  }%
  \expandafter\let\csname ORGN\expandafter\endcsname
                  \csname N\endcsname
  \expandafter\outer\expandafter\def\csname N\endcsname{%
    \con
    \advance\pageno by -1\relax
    \expandafter\let\csname N\expandafter\endcsname
                    \csname ORGN\endcsname
    \csname N\endcsname
  }%
  \begingroup
    \def\num{0}%
    \edef\x{\jobname}%
    \edef\y{\detokenize{tex}}%
    \ifx\x\y
      \def\num{1}%
    \else
      \edef\y{\detokenize{mf}}%
      \ifx\x\y
        \def\num{1}%
      \fi
    \fi
  \expandafter\endgroup\ifnum\num=1 %
    \def\contentspagenumber{2}%
    \let\ORGpageno\pageno
    \def\pageno{%
      \let\pageno\ORGpageno
      \expandafter\let\csname ORGN\expandafter\endcsname
                      \csname N\endcsname
      \expandafter\outer\expandafter\def\csname N\endcsname{%
        \con
        \advance\pageno by -1\relax
        \expandafter\let\csname N\expandafter\endcsname
                        \csname ORGN\endcsname
        \csname N\endcsname
      }%
      \pageno
    }%
  \fi
\fi