context (22apr16)

git-svn-id: svn://tug.org/texlive/trunk@40691 c570f23f-e606-0410-a88d-b1316a301751

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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 ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Core Macros / Two Pass Data}
+
+%D This is a rather old mechanism which has not changed much over
+%D time, apart from adding a few more selectors. This code used
+%D to be part of \type {core-uti}. The following examples demonstrate
+%D the interface.
+%D
+%D \startbuffer
+%D \definetwopasslist{test-1}
+%D
+%D \gettwopassdatalist{test-1} [\twopassdatalist=]
+%D \checktwopassdata  {test-1} [\twopassdata=]
+%D \checktwopassdata  {test-1} [\twopassdata=]
+%D \gettwopassdata    {test-1} [\twopassdata=]
+%D \gettwopassdata    {test-1} [\twopassdata=]
+%D
+%D \definetwopasslist{test-2}
+%D
+%D \lazysavetwopassdata{test-2}{1}{x}
+%D \lazysavetwopassdata{test-2}{2}{y}
+%D \lazysavetwopassdata{test-2}{3}{z}
+%D
+%D \gettwopassdatalist{test-2} [\twopassdatalist=x,y,z]
+%D \checktwopassdata  {test-2} [\twopassdata=x]
+%D \checktwopassdata  {test-2} [\twopassdata=x]
+%D \gettwopassdata    {test-2} [\twopassdata=x]
+%D \gettwopassdata    {test-2} [\twopassdata=y]
+%D \gettwopassdata    {test-2} [\twopassdata=z]
+%D \gettwopassdata    {test-2} [\twopassdata=]
+%D
+%D \definetwopasslist{test-3}
+%D
+%D \lazysavetaggedtwopassdata{test-3}{1}{x}{a}
+%D \lazysavetaggedtwopassdata{test-3}{2}{y}{b}
+%D \lazysavetaggedtwopassdata{test-3}{3}{z}{c}
+%D
+%D \findtwopassdata{test-3}{x} [\twopassdata=a]
+%D \findtwopassdata{test-3}{y} [\twopassdata=b]
+%D \findtwopassdata{test-3}{z} [\twopassdata=c]
+%D \findtwopassdata{test-3}{w} [\twopassdata=]
+%D
+%D \definetwopasslist{test-4}
+%D
+%D \lazysavetwopassdata{test-4}{1}{A}
+%D \lazysavetwopassdata{test-4}{2}{B}
+%D \lazysavetwopassdata{test-4}{3}{C}
+%D
+%D \getfirsttwopassdata{test-4}    [\twopassdata=A]
+%D \getlasttwopassdata {test-4}    [\twopassdata=C]
+%D \getfirsttwopassdata{test-4}    [\twopassdata=A]
+%D \getlasttwopassdata {test-4}    [\twopassdata=C]
+%D \getfromtwopassdata {test-4}{1} [\twopassdata=A]
+%D \getfromtwopassdata {test-4}{3} [\twopassdata=C]
+%D \getfromtwopassdata {test-4}{2} [\twopassdata=B]
+%D \stopbuffer
+%D
+%D \getbuffer \typebuffer
+
+\unprotect
+
+\registerctxluafile{core-two}{1.001}
+
+\def\immediatesavetwopassdata   #1#2#3{\normalexpanded{\noexpand\clf_savetwopassdata{#1}{#3}}}
+\def\savetwopassdata            #1#2#3{\normalexpanded{\noexpand\ctxlatecommand{savetwopassdata('#1',"#3")}}}
+\def\lazysavetwopassdata        #1#2#3{\normalexpanded{\noexpand\ctxlatecommand{savetwopassdata('#1',"#3")}}}
+\def\savetaggedtwopassdata    #1#2#3#4{\normalexpanded{\noexpand\clf_savetaggedtwopassdata{#1}{#3}{#4}}}
+\def\lazysavetaggedtwopassdata#1#2#3#4{\normalexpanded{\noexpand\ctxlatecommand{savetaggedtwopassdata('#1','#3',"#4")}}}
+
+% temp hack: needs a proper \starteverytimeluacode
+
+\setfalse\twopassdatafound
+\let     \twopassdata      \empty
+\let     \twopassdatalist  \empty
+
+\newif   \iftwopassdatafound  % obsolete, will go
+
+\def\syst_twopass_check % can be delegated to lua once obsolete is gone
+  {\ifx\twopassdata\empty
+     \twopassdatafoundfalse % obsolete
+     \setfalse\twopassdatafound
+   \else
+     \twopassdatafoundtrue  % obsolete
+     \settrue\twopassdatafound
+   \fi}
+
+\def\syst_twopass_set_not_found
+  {\twopassdatafoundfalse % obsolete
+   \setfalse\twopassdatafound}
+
+\def\syst_twopass_set_found
+  {\twopassdatafoundtrue % obsolete
+   \settrue\twopassdatafound}
+
+\unexpanded\def\definetwopasslist        #1{\clf_definetwopasslist{#1}}
+\unexpanded\def\gettwopassdata           #1{\edef\twopassdata    {\clf_gettwopassdata      {#1}}\syst_twopass_check}
+\unexpanded\def\checktwopassdata         #1{\edef\twopassdata    {\clf_checktwopassdata    {#1}}\syst_twopass_check}
+\unexpanded\def\findtwopassdata        #1#2{\edef\twopassdata    {\clf_findtwopassdata {#1}{#2}}\syst_twopass_check}
+\unexpanded\def\getfirsttwopassdata      #1{\edef\twopassdata    {\clf_getfirsttwopassdata {#1}}\syst_twopass_check}
+\unexpanded\def\getlasttwopassdata       #1{\edef\twopassdata    {\clf_getlasttwopassdata  {#1}}%
+                                            \edef\noftwopassitems{\clf_counttwopassdata    {#1}}\syst_twopass_check}
+\unexpanded\def\getnamedtwopassdatalist#1#2{\edef              #1{\clf_gettwopassdatalist  {#2}}}
+\unexpanded\def\gettwopassdatalist       #1{\edef\twopassdatalist{\clf_gettwopassdatalist  {#1}}}
+
+\unexpanded\def\doifelseintwopassdata  #1#2{\clf_doifelseintwopassdata{#1}{#2}}
+
+           \let\doifintwopassdataelse       \doifelseintwopassdata
+           \let\getfromtwopassdata          \findtwopassdata
+
+\protect \endinput