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% Package manyind.sty, Wilberd van der Kallen 2019.
%
% Variation on \usepackage[multind]{robustindex}, now without pagerefs in indexes.
% https://www.staff.science.uu.nl/~kalle101/mind.html
%
% Copyright 2019 Wilberd van der Kallen
%
% This file may be distributed under the conditions of the LaTeX Project Public
% License, either version 1.2 of this license or (at your option) any
% later version. The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.2 or later is part of all distributions of LaTeX
% version 1999/12/01 or later.
\ProvidesPackage{manyind}
[2019/01/09
many indexes]
\RequirePackage{makeidx}
\AtBeginDocument{\def\ind@nr#1{\string\indnr\mindchoice d\gr@bltr#1-\relax b #1}%
\ifx\@@wrindex\undefined
\def\@wrindex#1{\@bsphack
\protected@write
\@indexfile {}{\string \indexentry
{\ind@nr #1}{\thepage}}%
\endgroup
\@esphack}%
\else
\def\@wrindex#1{\@@wrindex\ind@nr#1||\\}%
\fi
\setindex{main}}%
\AtEndDocument{%
\PackageWarning{manyind}{There are \the\c@mindexctr\space indexes. Did you run makeindex
recently?}%
}%
\newcommand{\ind@nr}{\relax}% We prepend the argument of \index with a string used by
% makeindex for its lexicographic sorting. Thus it ends up in the ind file in a place
% based on which index is active and what the first letter of the index entry is.
\newcommand{\@sindex}{\relax}
\newcommand{\@@sindex}{\relax}
\newcommand\sindex{\@ifnextchar[{\@sindex}{\@@sindex}}%
\def\@sindex[#1]{\setindex{#1}\index}
\def\@@sindex{\setindex{main}\index}
\newcommand{\mind@prnt}{\relax}
\newcommand{\mind@@prnt}{\relax}
\newcommand{\mind@@@prnt}{\relax}
\newcommand{\mind@@@@prnt}{\relax}
\def\mind@@prnt[#1]{\setindex{#1}\mind@@@prnt}
\let\mind@prnt\printindex
\renewcommand{\printindex}{\@ifnextchar[{\mind@@prnt}{\mind@prnt}}%
\renewcommand{\mind@@@prnt}{\@ifnextchar[{\mind@@@@prnt}{\mind@prnt}}
\def\mind@@@@prnt[#1]{\renewcommand{\indexname}{#1}\mind@prnt}
\newcommand{\indexpreamble}{\relax}% compare the preamble of makeindex
\newcommand{\indexincontents}{%
\def\indexpreamble{%
\refstepcounter{subsection}%
% This creates a hyperlink destination.
% Compare phantomsection in hyperref.
% An index is not to be followed immediately by a subsection.
\addcontentsline{toc}%
{\ifx\c@chapter\undefined section\else chapter\fi}{\indexname}%
}%
}%
\newcommand{\old@theindex}{}%
\let\old@theindex\theindex
\def\theindex{%
\old@theindex
\indexpreamble
}%
\newcommand{\mgobblepgeref}{\relax}
\def\mgobblepgeref, #1 {}
\newcommand{\gobblepageref}{\protect\mgobblepgeref}
\newcommand{\gr@bltr}{\relax}%
\def\gr@bltr#1#2\relax{\ifcat A#1\the\uccode`#1\else 60\fi}% to keep "a" and "A" together.
% But first some code for embellishing an index. Our hacking brakes the insertion of
% \indexspace at appropriate places. We have to work hard to restore that. While we
% are at it, we may as well add the possibility to insert a letter T after the
% \indexspace that precedes the entries that start with t or T.
% First we describe the default style, that does not insert the T.
\newcommand{\indexcapstyle}[1]{\indexspace}
% To get the T one changes the style like this
% \renewcommand{\indexcapstyle}[1]{\indexspace\textbf{#1}\par}%
\newcommand{\nxtletre}{\def\item{\letr@test}}% about next letter in alphabet
\newcommand{\mindc@pitalhead}[1]{% Preparing for a heading; not printed.
\protected@write
\@indexfile {}{\string \indexentry
{\string\indnr \mindchoice d\gr@bltr#1\relax a #1@\protect\nxtletre
\protect\def\protect\nwletre{#1}\string\jmptonine}{9}}%
}%
\newcommand{\capitals@inindex}[1]{% Will be called by \mnew@index with full alphabet.
\mfind@capitals#1\relax}%
\newcommand{\mfind@capitals}{\relax}%
\def\mfind@capitals#1#2\relax{% To deal with 26 letters.
\mindc@pitalhead #1%
\ifx\relax#2\relax
\else\mfind@capitals#2\relax
\fi}%
\newcommand{\letr@test}{\relax}% To test if entry starts with new letter.
\long\def\letr@test#1{\ifx#1\nxtletre\else\proc@letter{#1}\fi}%
\newcommand{\proc@letter}{\relax}%
\def\proc@letter#1{\long\def\item{\m@olditem}\ifx#1\relax\else\indexcapstyle{\nwletre}\fi
\ifx#1\indnr\expandafter\ja@\else #1\fi}%
\newcommand{\m@olditem}{\relax}%
\newcommand{\ja@}{\relax}
\def\ja@#1 {\fi}% Mysterious. Seems necessary.
% All this just to embellish an index. Now more support for multiple indexes.
\newcommand{\setindex}[1]{%
\@bsphack
\expandafter\ifx\csname#1@rbstind\endcsname\relax
\mnew@index{#1}%
\else
\edef\mindchoice{\csname#1@rbstind\endcsname}%
\fi
\@esphack}%
\newcounter{multindctr}%
\newcounter{mindexctr}
\newcommand{\mindcutpoint}{\relax}%
\newcommand{\untilmindcutpoint}{\relax}%
\newcommand{\mnew@index}{\relax}%
\newcommand{\mindchoice}{\relax}%
\newcommand{\indnr}{\relax}%
\setcounter{multindctr}{999}% Fewer than 899 indexes expected.
\long\def\untilmindcutpoint#1\mindcutpoint{\fi}%
% This tels the mouth of TeX not to send too much to the stomach.
% It should only forward the part that belongs to the active index.
\def\indnr#1 {}% The \indnr part is used for sorting by makeindex and needs to be ignored
% by TeX thereafter.
\newcommand\multindpreamble{\let\m@olditem\item}%
% \multindpreamble may serve as hook for further code.
\newcommand{\jmptonine}{\relax}%
\def\jmptonine#1 9{\relax}
\def\mnew@index#1{\@bsphack
\ifx\@indexfile\undefined\PackageWarning{manyind}{%
Package needs \string\make index in preamble. Detected}\fi
\ifnum\c@multindctr=999%
\protected@write
\@indexfile {}{\string \indexentry
{\string\indnr 999b @\string\nxtletre
\string\mindcutpoint\string\jmptonine}{9}}%
\@esphack
\fi
\addtocounter{multindctr}{-1}%
\expandafter\edef\csname#1@rbstind\endcsname{\the\c@multindctr}%
\edef\mindchoice{\csname#1@rbstind\endcsname}%
\stepcounter{mindexctr}
\PackageInfo{manyind}{index #1 has number \mindchoice.}%
\@esphack
\protected@write
\@indexfile {}{\string \indexentry
{\string\indnr\the\c@multindctr d91a @\protect\nxtletre\protect\def
\protect\nwletre{\relax}\string\jmptonine
}{9}}%
\protected@write
\@indexfile {}{\string \indexentry
{\string\indnr\the\c@multindctr a @%
\string\mindcutpoint
\string\ifnum\string\mindchoice=\the\c@multindctr\string\multindpreamble
\string\else\string\untilmindcutpoint
\string\fi\string\jmptonine
}{9}}%
\capitals@inindex{ABCDEFGHIJKLMNOPQRSTUVWXYZ}%
\@esphack
}%
\endinput
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