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%D \module
%D [ file=core-two, % moved from core-uti
%D version=1997.03.31,
%D title=\CONTEXT\ Core Macros,
%D subtitle=Two Pass Data,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\unprotect
%D We save two pass information in the utility file.
\addutilityreset{twopassentries}
\def\immediatesavetwopassdata #1#2#3{\immediatewriteutilitycommand{\twopassentry{#1}{#2}{#3}}}
\def\savetwopassdata #1#2#3{\writeutilitycommand{\twopassentry{#1}{#2}{#3}}}
\def\lazysavetwopassdata #1#2#3{\expanded{\writeutilitycommand{\noexpand\twopassentry{#1}{#2}{#3}}}} % expanded !
\def\savetaggedtwopassdata #1#2#3#4{\immediatewriteutilitycommand{\twopassentry{#1}{#2}{#3::#4}}}
\def\lazysavetaggedtwopassdata#1#2#3#4{\expanded{\writeutilitycommand{\noexpand\twopassentry{#1}{#2}{#3::#4}}}} % expanded !
\def\resettwopassentries
{\let\twopassentry\gobblethreearguments}
\def\settwopassentries
{\def\twopassentry##1{\executeifdefined{@@##1\s!pass}\gobbletwoarguments}}
\resettwopassentries
\def\appendtwopasselement#1#2#3% can sometimes become a large list
{%\debuggerinfo{\m!systems}{twopass data #1 - #2 = #3}%
\expandafter\xdef\csname#1:\s!list\endcsname
{\@EA\ifx\csname#1:\s!list\endcsname\empty \else
\csname#1:\s!list\endcsname,\fi#3}}
\def\dodefinetwopasslist#1%
{\doifundefined{#1:\s!list}
{%\debuggerinfo\m!systems{defining twopass class #1}%
\doglobal\addutilityreset{#1\s!pass}%
\setgvalue{\s!set #1\s!pass}{\dosettwopasslist {#1}}%
\setgvalue{\s!reset#1\s!pass}{\doresettwopasslist{#1}}%
\getvalue {\s!reset#1\s!pass}}}
\def\definetwopasslist#1%
{\expanded{\dodefinetwopasslist{#1}}%
\doglobal\addtocommalist{#1}\alltwopasslists}
\def\dosettwopasslist#1%
{\letgvalue{\s!set#1\s!pass}\gobbletwoarguments
\setgvalue{@@#1\s!pass}{\appendtwopasselement{#1}}}
\def\doresettwopasslist#1%
{\letgvalue{@@#1\s!pass}\gobbletwoarguments}
\def\doloadtwopassdata#1%
{\doifundefined{#1:\s!list}
{\startnointerference
\letgvalueempty{#1:\s!list}%
\protectlabels
\doutilities{twopassentries,#1\s!pass}\jobname\empty\relax\relax
\stopnointerference}}
\def\loadtwopassdata
{\ifx\alltwopasslists\empty\else
\processcommacommand[\alltwopasslists]\doloadtwopassdata
\globallet\alltwopasslists\empty
\fi}
\def\dogettwopassdata[#1,#2]#3#4%
{\edef\twopassdata{#1}%
\ifx\twopassdata\empty
\twopassdatafoundfalse
\let\twopassdata\empty
\else
\twopassdatafoundtrue
\ifcase#4\or\setxvalue{#3:\s!list}{#2}\fi
\fi}
\def\gettwopassdata#1%
{\loadtwopassdata \@EAEAEA\dogettwopassdata\@EA\@EA\@EA[\csname#1:\s!list\endcsname,]{#1}\plusone}
\def\checktwopassdata#1%
{\loadtwopassdata \@EAEAEA\dogettwopassdata\@EA\@EA\@EA[\csname#1:\s!list\endcsname,]{#1}\zerocount}
\def\findtwopassdata#1#2%
{\loadtwopassdata \expanded{\dofindtwopassdata{#1}{#2}}}
\def\dofindtwopassdata#1#2%
{\def\dodofindtwopassdata[##1,##2#2::##3,##4]{\edef\twopassdata{##3}}%
\@EAEAEA\dodofindtwopassdata\@EA\@EA\@EA[\@EA\@EA\@EA,\csname#1:\s!list\endcsname,#2,#2::,]%
\ifx\twopassdata\empty
\twopassdatafoundfalse
\else
\twopassdatafoundtrue
\fi}
\let\getfirsttwopassdata\checktwopassdata
\def\getlasttwopassdata#1%
{\loadtwopassdata
\scratchcounter\zerocount
\@EAEAEA\rawprocesscommalist\@EA\@EA\@EA[\csname#1:\s!list\endcsname]\dogetlasttwopassdata
\edef\noftwopassitems{\the\scratchcounter}%
\iftwopassdatafound\else
\let\twopassdata\empty
\fi}
\def\dogetlasttwopassdata#1%
{\edef\nexttwopassdata{#1}%
\ifx\nexttwopassdata\empty \else
\let\twopassdata\nexttwopassdata
\advance\scratchcounter \plusone
\twopassdatafoundtrue
\fi}
\def\getfromtwopassdata#1#2%
{\loadtwopassdata
\@EAEAEA\getfromcommalist\@EA\@EA\@EA[\csname#1:\s!list\endcsname][#2]%
\ifx\commalistelement\empty
\twopassdatafoundfalse
\let\twopassdata\empty
\else
\twopassdatafoundtrue
\let\twopassdata\commalistelement
\fi}
\def\gettwopassdatalist#1%
{\loadtwopassdata
\letcscsname\twopassdatalist\csname#1:\s!list\endcsname
\ifx\twopassdatalist\relax\let\twopassdatalist\empty\fi}
\def\gettwopassdatalist
{\getnamedtwopassdatalist\twopassdatalist}
\def\doifelseintwopassdata#1#2% tag dat
{\gettwopassdatalist{#1}%
\expanded{\doifinsetelse{#2}{\twopassdatalist}}}
\protect \endinput
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