1 files changed, 348 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/mkii/buff-ini.mkii b/Master/texmf-dist/tex/context/base/mkii/buff-ini.mkii
new file mode 100644
index 00000000000..7fdb89e45cd
--- /dev/null
+++ b/Master/texmf-dist/tex/context/base/mkii/buff-ini.mkii
@@ -0,0 +1,348 @@
+%D \module
+%D   [       file=buff-ini, % was core-buf % blocks are moved to core-blk
+%D        version=2000.01.05,
+%D          title=\CONTEXT\ Buffer Macros,
+%D       subtitle=Buffers,
+%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 Buffer Macros / Buffers}
+
+\unprotect
+
+% Helpers:
+
+\chardef\buffernestmode\plusone % 0: not nested, 1: startbuffer nested, 2: all buffers nested
+
+\edefconvertedargument\emptybufferline{ }
+
+\ifx\tmpblocks\undefined \newwrite\tmpblocks \fi
+
+\newif\iftmpblockstarted
+
+\long\def\flushbufferline#1%
+  {\iftmpblockstarted
+     \ifsegmentatebuffer
+       \ifemptybufferline
+         \immediate\write\tmpblocks{\string\stopbufferparagraph }%
+         \immediate\write\tmpblocks{\string\startbufferparagraph}%
+       \else
+         \immediate\write\tmpblocks{#1}%
+       \fi
+     \else
+       \immediate\write\tmpblocks{#1}%
+     \fi
+   \else
+     \doifsomething{#1}
+       {\tmpblockstartedtrue
+        \immediate\write\tmpblocks{\string#1}}%
+   \fi}
+
+\long\def\processnextbufferlineA#1%
+  {\relax % checken waarom eerdere macro dit nodig heeft / supp-mps run
+   \defconvertedargument\next{#1 }%
+   \doifinstringelse{\delcharacter\letterpercent}{\delcharacter\next}
+     {\secondoftwoarguments}
+     {\doifincsnameelse\endofblock\next
+        {\ifnum\nestedbufferlevel=\zerocount
+           \expandafter\firstoftwoarguments
+         \else
+           \decrement\nestedbufferlevel\relax
+           \expandafter\secondoftwoarguments
+         \fi}
+        {\doifincsnameelse\beginofblock\next
+           {\increment\nestedbufferlevel\relax
+            \secondoftwoarguments}
+           {\secondoftwoarguments}}}}
+
+\long\def\processnextbufferlineB#1% #2#3%
+  {\defconvertedargument\next{#1 }%
+   \ifx\next\emptybufferline
+     \ifsegmentatebuffer \emptybufferlinetrue \fi
+     \expandafter\secondoftwoarguments% #3%
+   \else
+     \emptybufferlinefalse
+     \doifinstringelse\endofblock\next
+       {\expandafter\firstoftwoarguments }% #2}
+       {\expandafter\secondoftwoarguments}% #3}%
+   \fi}
+
+\bgroup
+\obeylines
+\long\gdef\copybufferline#1
+  {\processnextbufferline{#1}\closebufferfile{\flushbufferline{#1}\copybufferline}}
+\egroup
+
+\newif\ifsegmentatebuffer
+\newif\ifemptybufferline
+
+\def\currentbuffer{\jobname}
+
+\def\setcurrentbuffer#1%
+  {\doifelsenothing{#1}{\edef\currentbuffer{\jobname}}{\edef\currentbuffer{#1}}}
+
+\def\resetbuffer
+  {\dosingleempty\doresetbuffer}
+
+\def\doresetbuffer[#1]%
+  {\begingroup
+   \setcurrentbuffer{#1}%
+   \unlinkfile{\TEXbufferfile\currentbuffer}%
+   \endgroup}
+
+\def\dostartbuffer
+  {\bgroup
+   \obeylines % nodig, anders gaat 't fout als direct \starttable (bv)
+   \doquadrupleempty\dodostartbuffer}
+
+\def\dodostartbuffer[#1][#2][#3][#4]% upward compatible
+  {\iffourthargument
+     \def\next{\dododostartbuffer{#1}{#2}{#3}{#4}}%
+   \else
+     \def\next{\dododostartbuffer  {}{#1}{#2}{#3}}%
+   \fi
+   \next}
+
+\def\dododostartbuffer#1#2#3#4%
+  {%\showmessage\m!systems{15}{#2}%
+   \doifelsevalue{\??bu#1\c!paragraph}\v!yes
+     {\segmentatebuffertrue} % todo in mkiv
+     {\doifnumberelse{\getvalue{\??bu#1\c!paragraph}}\segmentatebuffertrue\segmentatebufferfalse}%
+   \doifvalue{\??bu#1\c!local}\v!yes
+     {\chardef\buffernestmode\plustwo}% permit nesting
+   \setcurrentbuffer{#2}%
+   \doifelsenothing{#4}
+     {\letbeundefined{\e!stop\v!buffer}% % \let\stopbuffer=\relax   % \undefined
+      \edefconvertedargument\beginofblock{\e!start\v!buffer}%
+      \edefconvertedargument\endofblock  {\e!stop \v!buffer}%
+      \ifcase\buffernestmode
+        \let\processnextbufferline\processnextbufferlineB
+      \else
+        \let\processnextbufferline\processnextbufferlineA
+      \fi}
+     {\letbeundefined{#4}% \letvalue{#4}=\relax     % \undefined
+      \expandafter\defconvertedargument\expandafter\beginofblock\expandafter{\csname#3\endcsname}% we could use defconvertedcommand here (no \expandafter)
+      \expandafter\defconvertedargument\expandafter\endofblock  \expandafter{\csname#4\endcsname}% we could use defconvertedcommand here (no \expandafter)
+      \ifcase\buffernestmode
+          \let\processnextbufferline\processnextbufferlineB
+        \or
+          \let\processnextbufferline\processnextbufferlineB
+        \else
+          \let\processnextbufferline\processnextbufferlineA
+      \fi}%
+   \def\closebufferfile
+     {\ifsegmentatebuffer
+        \immediate\write\tmpblocks{\string\stopbufferparagraph}%
+      \fi
+      \immediate\closeout\tmpblocks
+      \egroup
+      \getvalue{#4}}%
+   \doifelsenothing{#2}
+     {\edef\bufferfilename{\TEXbufferfile\jobname}}%
+     {\edef\bufferfilename{\TEXbufferfile{#2}}}%
+   \immediate\openout\tmpblocks\bufferfilename
+   \ifsegmentatebuffer
+     \immediate\write\tmpblocks{\string\startbufferparagraph}%
+   \fi
+   \newcounter\nestedbufferlevel
+   \recatcodeuppercharacterstrue
+   \setcatcodetable\vrbcatcodes
+   \obeylines
+   \copybufferline}
+
+\letvalue{\e!start\v!buffer}\dostartbuffer
+
+\let\endbuffer\undefined % to please the dep parser
+
+\def\setbuffer
+  {\dosingleempty\dosetbuffer}
+
+\long\def\dosetbuffer[#1]#2\endbuffer % seldom used so we just pass #2
+  {\begingroup
+   \setcurrentbuffer{#1}%
+   \edef\bufferfilename{\TEXbufferfile{\currentbuffer}}%
+   \immediate\openout\tmpblocks\bufferfilename
+   \defconvertedargument\ascii{#2}%
+   \immediate\write\tmpblocks{\ascii}%
+   \immediate\closeout\tmpblocks
+   \endgroup}
+
+\def\setupbuffer
+  {\dodoubleempty\dosetupbuffer}
+
+\def\dosetupbuffer[#1][#2]%
+  {\ifsecondargument
+     \getparameters[\??bu#1][#2]%
+   \else
+     \getparameters[\??bu][#1]%
+   \fi}
+
+\def\dodefinebuffer[#1][#2]%
+  {\iffirstargument % else problems
+     \doglobal\increment\nofdefinedbuffers
+     \letvalue{\??bu#1\c!number   }\nofdefinedbuffers
+     \letvalue{\??bu#1\c!paragraph}\v!no
+     \setevalue{\e!start#1}{\noexpand\dostartbuffer[#1][def-\nofdefinedbuffers][\e!start#1][\e!stop#1]}%
+     \unexpanded\setevalue{\e!get  #1}{\noexpand\dogetbuffer  [#1][def-\nofdefinedbuffers]}%
+     \unexpanded\setevalue{\e!type #1}{\noexpand\dotypebuffer [#1][def-\nofdefinedbuffers]}%
+     \getparameters[\??bu#1][#2]%
+   \fi}
+
+\def\definebuffer
+  {\dodoubleempty\dodefinebuffer}
+
+\unexpanded\def\getbuffer
+  {\dodoubleempty\dogetbuffer}
+
+\def\dogetbuffer[#1][#2]%
+  {\ifsecondargument
+     \dodogetbuffer[#1][#2]%
+   \else
+     \dodogetbuffer[][#1]%
+   \fi}
+
+\def\dogetbufferasis{\readjobfile{\TEXbufferfile{\currentbuffer}}\donothing\donothing}%
+
+\def\dodogetbuffer[#1][#2]%
+  {\getvalue{\??bu#1\c!before}%
+   \dobuffer{16}{#2}\dogetbufferasis
+   \getvalue{\??bu#1\c!after}}
+
+\unexpanded\def\typebuffer
+  {\dodoubleempty\dotypebuffer}
+
+\def\dogetfilebuffer{\typefile{\TEXbufferfile{\currentbuffer}}}
+
+\def\dotypebuffer[#1][#2]%
+  {\iffirstargument
+     \dobuffer{17}{#1}\dogetfilebuffer
+   \else
+     \dobuffer{17}{#2}\dogetfilebuffer
+   \fi}
+
+\def\dobuffer#1#2#3%
+  {\doifelsenothing{#2}
+     {\dodobuffer#3\jobname}
+     {\processcommalist[#2]{\dodobuffer#3}}}
+
+\def\dodobuffer#1#2% command name
+  {\pushmacro\currentbuffer
+   \edef\currentbuffer{\ifcsname\??bu#2\c!number\endcsname def-\csname\??bu#2\c!number\endcsname\else#2\fi}%
+   \beginrestorecatcodes
+   #1%
+   \endrestorecatcodes
+   \popmacro\currentbuffer}
+
+\def\processTEXbuffer{\getbuffer} % handy
+
+% seldom used, only in a few projects that demanded more speed
+
+\def\dostartmemorybuffer
+  {\dosingleempty\dostartmemorybuffer}
+
+\long\def\dostartmemorybuffer[#1]#2\stopbuffer
+  {\setbuffer[#1]#2\endbuffer}
+
+\let\dostartfilebuffer\startbuffer
+
+\def\usememorybuffers{\let\startbuffer\dostartmemorybuffer}
+\def\usefilebuffers  {\let\startbuffer\dostartfilebuffer}
+
+% this features is soldom used (complex examns where we need to fetch
+% special parts of a text
+%
+% this is not yet supported in mkiv (relatively easy to do but there
+% we don't have the par tags but need to grab 'm
+
+\def\skippedbufferparagraphs{0}
+
+\let\startbufferparagraph\relax
+\let\stopbufferparagraph \par   % \relax
+
+\newcount\currentbufferparagraph
+
+\def\getbufferparagraphs
+  {\dodoubleempty\dogetbufferparagraphs}
+
+\def\dosetbufferoffset#1%
+  {\doifnumberelse{\getvalue{\??bu#1\c!paragraph}}
+     {\currentbufferparagraph-\getvalue{\??bu#1\c!paragraph}}
+     {\currentbufferparagraph \zerocount}%
+   \relax}
+
+\def\dogetbufferparagraphs[#1][#2]%
+  {\iffirstargument
+     \ifsecondargument
+       \dosetbufferoffset{#1}%
+       \doifelse{#2}\v!all
+         {\def\startbufferparagraph{\normalbufferparagraph{#1}}}
+         {\def\startbufferparagraph{\filterbufferparagraph{#1}{#2}}}%
+       \def\stopbufferparagraph{\dostopbufferparagraph{#1}}%
+       \def\next{\getparagraphedbuffer[#1]}%
+     \else
+       \dosetbufferoffset\empty
+       \def\startbufferparagraph{\filterbufferparagraph{}{#1}}%
+       \def\stopbufferparagraph{\dostopbufferparagraph{}}%
+       \def\next{\getparagraphedbuffer[]}%
+     \fi
+   \else
+     \dosetbufferoffset\empty
+     \def\startbufferparagraph{\normalbufferparagraph{}}%
+     \def\stopbufferparagraph{\dostopbufferparagraph{}}%
+     \def\next{\getparagraphedbuffer[]}%
+   \fi
+   \next}
+
+\def\dogetparagraphbuffer{\readjobfile{\TEXbufferfile{\currentbuffer}}\donothing\donothing}
+
+\def\getparagraphedbuffer[#1]%
+  {\dobuffer{16}{#1}\dogetparagraphbuffer}
+
+\def\dostopbufferparagraph#1%
+  {\getvalue{\??bu#1\c!after}\par}
+
+\def\dostartbufferparagraph#1%
+  {\par\getvalue{\??bu#1\c!before}}
+
+\def\normalbufferparagraph
+  {\advance\currentbufferparagraph \plusone
+   \ifnum\currentbufferparagraph>\zerocount
+     \expandafter\dostartbufferparagraph
+   \else
+     \expandafter\gobblebufferparagraph
+   \fi}
+
+\def\filterbufferparagraph#1#2%
+  {\advance\currentbufferparagraph \plusone
+   \ifcase\currentbufferparagraph
+     \expandafter\gobblebufferparagraph
+   \else
+     \doifinsetelse{\the\currentbufferparagraph}{#2}
+       {\expandafter\dostartbufferparagraph}
+       {\expandafter\fakebufferparagraph}%
+   \fi
+   {#1}}
+
+\long\def\gobblebufferparagraph#1#2\stopbufferparagraph
+  {}
+
+\def\fakebufferparagraph#1%
+  {\bgroup
+   \def\stopbufferparagraph{\dostopbufferparagraph{#1}\egroup\egroup}%
+   \setbox\scratchbox\vbox\bgroup\dostartbufferparagraph{#1}}
+
+% definitions
+
+\definebuffer[\v!hiding] \setupbuffer[\v!hiding][\c!local=\v!yes]
+
+\setupbuffer
+  [\c!paragraph=\v!no,
+   \c!before=,
+   \c!after=]
+
+\protect \endinput