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Initial revision

% $Id: users.tex,v 1.11 2001/09/11 12:25:20 karim Exp $
% Copyright (c) 2000  The PARI Group
%
% This file is part of the PARI/GP documentation
%
% Permission is granted to copy, distribute and/or modify this document
% under the terms of the GNU Free Documentation License

% This file should be compiled with plain TeX
\def\TITLE{User's Guide to Pari-GP}
\input parimacro.tex
\ifPDF % PDF output (requires pdftex)
  \input pdfmacs.tex
\fi

%
% START TYPESET
%
\begintitle
\vskip 2.5truecm
\centerline{\mine User's Guide}
\vskip 1.truecm
\centerline{\mine to}
\vskip 1.truecm
\centerline{\mine PARI / GP}
\vskip 1.truecm
\authors
\centerline{last updated 28 August 2001}
\centerline{for version \vers}
\endtitle

\copyrightpage

\begintitle
\centerline{Table of Contents}\medskip
\ifsecondpass
  \parskip=0pt plus 1pt
  \parindent=0pt
  \obeylines\input\jobname.toc
\else
% toc is 1 page long, uncomment below if it gets longer
%  \newpage
\fi
\endtitle

\chapno=0
{ \input usersch1 }
{ \input usersch2 }
{ \input usersch3 }
{ \input usersch4 }
{ \input usersch5 }
{ \input appa }
{ \input appb }
{ \input appc }

%%
%% INDEX (Macros)
%%

\ifsecondpass\else
  \condwrite\index{The End}
  \immediate\condwrite\toc{Index\string\dotfill\the\pageno}
  \ifPDF \writesecnumbers \fi
  \expandafter\end % stop here the first time (don't process index)
\fi

\ifPDF
% Add a bookmark entry for the index.   CHB
  \putchapdest
  \pdfoutline goto name {pdfchap@\the\pdfchapcntr} {Index}
\fi

\newdimen\fullhsize
\fullhsize=\hsize
\advance\hsize by -20pt
\divide\hsize by 2

\def\fullline{\hbox to\fullhsize}
\let\lr=L\newbox\leftcolumn

\headline={\hfil\bf Index\hfil\global\headline={\hfil}}

\def\makeheadline{\vbox to 0pt{\vskip-22.5pt
  \fullline{\vbox to8.5pt{}\the\headline}\vss}
  \nointerlineskip}

\def\makefootline{\baselineskip=24pt\fullline{\the\footline}}

\output={\if L\lr   %cf. The TeXbook, p257
  \global\setbox\leftcolumn=\columnbox\global\let\lr=R
  \else\doubleformat\global\let\lr=L\fi
  \ifnum\outputpenalty>-20000\else\dosupereject\fi}
\def\doubleformat{\shipout\vbox
  {\makeheadline
  \fullline{\box\leftcolumn\hfil\columnbox}
  \makefootline}
  \advancepageno}
\def\columnbox{\leftline{\pagebody}}

\def\parse!#1#2!#3!#4!#5 {%
  \uppercase{\def\theletter{#1}}%
  \def\theword{#1#2}%
  \def\thefont{#3}%
  \def\thepage{#4}%
  \def\thedest{#5}}

\ifPDF
%% This puts the hyperlink command in the index, linked to the page
%% number. #1 is the usual page number, #2 the pdfcounter.  CHB
  \def\indxjump#1#2{\pdfannotlink attr {/Border [ 0 0 0 ] /H /O}
    goto name {pdf@#2}\pushcolor{\linkcolor}#1\popcolor\pdfendlink}
\else
  \def\indxjump#1#2{#1}
\fi

\def\theoldword{}
\def\theoldletter{}
\def\theoldpage{}
\def\theend{The End }

% more efficient to parse the glue specs once and keep them in registers
% for later use.  These govern index lines with too many page numbers to
% fit in one line
%  b: indentation for 2nd and further lines / a: compensation for same,
% and shrinkability for the normal word space
\newbox\dbox \setbox\dbox=\hbox to 3truemm{\hss.\hss}
\newskip\dfillskip \dfillskip=.5em plus .98\hsize
\def\dotfill{\leaders\copy\dbox\hskip\dfillskip\relax}
\newskip\interskipa \interskipa=-.4\hsize plus -1.5\hsize minus .11em
\newskip\interskipb \interskipb= .4\hsize plus  1.5\hsize

% cf. The TeXbook, p393:
\def\interpage{,\penalty100\kern0.33em%normal space
  \hskip\interskipa\vadjust{}\penalty10000 \hskip\interskipb\relax}

\def\newword{\relax\endgraf%
  {\csname\thefont\endcsname\theword}\dotfill\indxjump{\thepage}{\thedest}%
  \let\theoldfont\thefont%
  \let\theoldword\theword}

%%
%% INDEX
%%
\parskip=0pt plus 1pt
\parindent=0pt
\parfillskip=0pt

\catcode`\_=11 % make _ an ordinary char (frequent in function names)

\def\li#1{\hbox to\hsize{#1\hfil}}
\li{\var{SomeWord} refers to PARI-GP concepts.}
\li{\kbd{SomeWord} is a PARI-GP keyword.}
\li{SomeWord is a generic index entry.}

\checkfile{users.std}
\newif\ifmore
\loop
  \read\std to\theline
  \ifx\theline\theend\morefalse\else\moretrue\fi
\ifmore
  \expandafter\parse\theline
  \ifx \theletter \theoldletter \else \endgraf
    \vskip 10pt plus 10pt\centerline{\bf\theletter}
    \vskip  6pt plus  7pt
  \fi
  \ifx \theword \theoldword
    \ifx \thefont \theoldfont
      \ifx \thepage \theoldpage
      \else \interpage \indxjump{\thepage}{\thedest}\fi
    \else \newword \fi
  \else \newword \fi
  \let\theoldletter\theletter
  \let\theoldpage\thepage
\repeat%
\end