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% luaTeX: dynamical loaded patterns. Petr Olsak, March 2019

%\input hyphen  % plain-TeX hyphen-patterns loaded as language 0 in csplain.ini 
\global\chardef\enPatt=0
\gdef\pattlist{\enPatt=0}
\gdef\langlist{en(USpreloaded)}
\gdef\enlang{\uselang{en}\enPatt23\nonfrenchspacing} % \lefthyph=2 \righthyph=3

\input uni-lcuc  % \lccodes, \uccodes in unicode

\def\preplang #1 #2 #3#4 #5 {%
   \global\chardef#3=#4
   \expandafter \gdef \csname lan:#4\endcsname {#1}
   \def\next{\expandafter\noexpand\csname #1lang\endcsname}
   \expandafter\xdef \csname #1lang\endcsname {%
      \noexpand\loadpattrs #2 #4 
      \gdef\next{\noexpand\uselang{#1}#3#5}%
      \next
   }
   \xdef\langlist{\langlist\space #1(#2)}
}
\def\loadpattrs#1 #2 {%
   \directlua{
      require("luatex-hyphen")
      luatexhyphen.loadlanguage("#1",#2)
   }%
}
\def\uselang#1#2#3#4{\language=#2\lefthyphenmin=#3\righthyphenmin=#4\relax
   \frenchspacing  % \nonfrenchspacing can be set in \setlanguage{lan}
   \setlanguage{#1}%
}
\def\setlanguage#1{}

\preplang enus usenglishmax \enusPatt 100 23
\preplang engb ukenglish    \engbPatt 101 23
\preplang it   italian      \itPatt 102 22
\preplang ia   interlingua  \iaPatt 103 22
\preplang id   indonesian   \idPatt 104 22

\preplang cs   czech      \csPatt 115 23
\preplang sk   slovak     \skPatt 116 23
\preplang de   ngerman    \dePatt 121 22
\preplang fr   french     \frPatt 122 22
\preplang pl   polish     \plPatt 123 22 
\preplang cy   welsh      \cyPatt 124 23
\preplang da   danish     \daPatt 125 22
\preplang es   spanish    \esPatt 126 22
\preplang sl   slovenian  \slPatt 128 22
\preplang fi   finnish    \fiPatt 129 22
\preplang hy   hungarian  \huPatt 130 22
\preplang tr   turkish    \trPatt 131 22
\preplang et   estoniak   \etPatt 132 23
\preplang eu   basque     \euPatt 133 22
\preplang ga   irish      \gaPatt 134 23
\preplang nb   bokmal     \nbPatt 135 22
\preplang nn   nynorsk    \nnPatt 136 22
\preplang nl   dutch      \nlPatt 137 22
\preplang pt   portuguese \ptPatt 138 23
\preplang ro   romanian   \roPatt 139 22
\preplang hr   croatian   \hrPatt 140 22
\preplang zh   pinyin     \zhPatt 141 11
\preplang is   icelandic  \isPatt 142 22
\preplang hsb  uppersorbian \hsbPatt 143 22
\preplang af   afrikaans  \afPatt 144 12
\preplang gl   galician   \glPatt 145 22
\preplang kmr  kurmanji   \kmrPatt 146 22
\preplang tk   turkmen    \tkPatt 147 22
\preplang la   latin      \laPatt 148 22
\preplang lac  classiclatin \lacPatt 149 22
\preplang lal  liturgicallatin \lalPatt 150 22
\preplang elm  monogreek  \elmPatt 201 11
\preplang elp  greek      \elpPatt 202 11
\preplang grc  ancientgreek \grcPatt 203 11
\preplang ca   catalan    \caPatt 204 22
\preplang cop  coptic     \copPatt 205 11
\preplang mn   mongolian  \mnPatt 206 22
\preplang sa   sanskrit   \saPatt 207 13
\preplang ru   russian    \ruPatt 208 22
\preplang uk   ukrainian  \ukPatt 209 22
\preplang hy   armenian   \hyPatt 210 12
\preplang as   assamese   \asPatt 211 11
\preplang hi   hindi      \hiPatt 212 11
\preplang kn   kannada    \knPatt 213 11
\preplang lv   latvian    \lvPatt 215 22
\preplang lt   lithuanian \ltPatt 216 22
\preplang ml   malayalam  \mlPatt 217 11
\preplang mr   marathi    \mrPatt 218 11
\preplang or   oriya      \orPatt 219 11
\preplang pa   panjabi    \paPatt 220 11
\preplang ta   tamil      \taPatt 221 11
\preplang te   telugu     \tePatt 222 11

% For backward compatibility:

\let\uslang=\enlang  \let\ehyph=\enlang  
\def\chyph{\cslang}  \def\shyph{\sklang}
\let\csUnicode=\csPatt \let\czUnicode=\csPatt \let\skUnicode=\skPatt

\xdef\langlist{\langlist.
   Use \string\<shortname>lang to initialize language,
   \string\cslang\space for example}
\message{Language hyph.patterns ready to load: \langlist}

\endinput

%%%%%%%%%%%%%%%%%

The \<shortname>lang macros are prepared, like \cslang, \delang, \pllang.
You can expand \langlist to see which languages are prepared.

For example \preplang cs czech \csPatt 115 23 does: 

   \global\chardef\csPatt=115
   \gdef\lan:115{cs}
   \gdef\cslang{\loadpattrs czech 115
                 \gdef\cslang{\uselang{cs}\csPatt23}%
                 \cslang}
   \xdef\langlist{\langlist\space #1(#2)}

and \uselang{cs}\csPatt23 does: 

   \language=\csPatt \lefthyphenmin=2 \righthyphenmin=3 
   \frenchspacing \setlanguage{cs}

finally \setlanguage{cs} does nothing by default. But user can redefine
it and specify another features for selected lanuages here. For example:

\def\setlanguage#1{\csname set#1lang\endcsname}
\def\setenuslang {\nonfrenchspacing}
\def\setcslang   {...czech specific}
\def\setpllang   {...polish specific}
\def\seteslang   {...spanish specific}
\def\setrulang   {...russian specific}
...

You can see that \<shortname>lang macros can be used more than once but 
\loadpattrs will be done only once because \<shortname>lang redefines itself.


%%%%%%%%%%%%%%%%