% tamil.sty by Ross Moore <ross@mpce.mq.edu.au> $
%% $Log: 
%
% LaTeX2e package for typesetting Tamil script with EITHER:
%
%      1.  Jeroen Hellingman's  preprocessor: patc
% OR
%      2.  University of Washington  preprocessors: 
%		 tamilize  and  tmilize
%
% and the  wntml10  Tamil font, from the University of Washington.
%
% OR
%      3.  Indica pre-processor, and sinhala fonts:  sinha, sinhb, sinhc
%          by Yannis Haralambous <Yannis.Haralambous@univ-lille1.fr>
%
%          and the  sinhala.sty  package for LaTeX-2e,
%          by Dominik Wujastyk <D.Wujastyk@ucl.ac.uk>
%
%          extended for Prasad Dharmasena's <pkd@isr.umd.edu>
%          `samanala'  transliteration scheme
%          by Vasantha Saparamadu <vsaparam@ocs.mq.edu.au>
%
%
% These resources are *not* included with this package.
% Obtain them from CTAN:  http//ctan.tug.org/ctan
%
% ===================================================================
% This package has a corresponding implementation for  LaTeX2HTML 
% called:  tamil.perl .
% With LaTeX2HTML the options on the \usepackage line specify which
% preprocessor and transcription mode to use.
%
% usage:
%
%  \usepackage[tamilize]{tamil}   %|  uses Univ. of Washington preprocessor
%  \usepackage[tmilize]{tamil}    %|    tamilize  or  tmilize , resp.
%                                 %|  loads macros:  tamilmax.tex
%
%  \usepackage[tamil]{tamil}      %|  uses Jeroen Hellingman's preprocessor
%  \usepackage[wntml]{tamil}      %|    patc -p <option>.pat  
%  \usepackage[adami]{tamil}      %|  macros:  tmlmacs.tex  mmtrmacs.tex
%
%  \usepackage[preprocess]{tamil} %|  same as  \usepackage[tamil]{tamil}
%  \usepackage{tamil}             %|  same as  \usepackage[tamil]{tamil}
%
%
% for the Indica pre-processor:
%
%  \usepackage[indica]{tamil}     %|  uses #ALIAS TAMIL T
%  \usepackage[tam]{tamil}        %|  uses #ALIAS TAMIL TAM
%  \usepackage[7bit]{tamil}       %|  Velthuis' Hindi/Sanskri transcription
%  \usepackage[csx]{tamil}        %|  8-bit Sanskrit extension of ISO 646
%  \usepackage[latex]{tamil}      %|  standardized LaTeX transcription form
%  \usepackage[unicode]{tamil}    %|  ISO 10646-1 + Sinhalese extension
%  \usepackage[samanala]{tamil}   %|  Prasad Dharmasena's transliteration
%
% ===================================================================
% Warning:Error
%   On some systems the line  \catcode`^^A=0  in  tamilmax.tex
%   should be edited to read  \catcode`\^^A=0 .
% ===================================================================
%
\ProvidesFile{tamil.sty}[1998/1/10]
%
\NeedsTeXFormat{LaTeX2e}
%
\def\LoadIndica{\RequirePackage{indica}}
%
\DeclareOption{preprocess}{\ds@tamil}
\DeclareOption{tamil}{\ds@tamil}
\DeclareOption{wntml}{\ds@wntml}
\DeclareOption{adami}{\ds@adami}
\DeclareOption{tamilize}{\ds@tamilize}
\DeclareOption{tmilize}{\ds@tamilize}

\DeclareOption{indica}{\ds@indica}
\DeclareOption{7bit}{\ds@sevenbit}
\DeclareOption{csx}{\ds@csx}
\DeclareOption{latex}{\ds@latex}
\DeclareOption{samanala}{\ds@samanala}
\DeclareOption{unicode}{\ds@unicode}
\DeclareOption{tam}{\ds@tam}

\DeclareOption*{\@latexerr{%
 `\CurrentOption' is an invalid option, using `preprocess' instead}%
 {Available Options:^^J^^J* Hellingman's patc^^J
  preprocess,tamil,wntml,adami^^J^^J* Tamilize^^J
  tamilize,tmilize^^J^^J* Indica^^J
  indica,7bit,csx,latex,unicode,samanala,tam^^J}\ds@tamil}

\def\ds@indica{\@loadindica{tamil}}
\def\ds@sevenbit{\@loadindica{tamil,7bit}}
\def\ds@csx{\@loadindica{tamil,csx}}
\def\ds@latex{\@loadindica{tamil,latex}}
\def\ds@samanala{\@loadindica{tamil,samanala}}
\def\ds@unicode{\@loadindica{tamil,unicode}}
\def\ds@tam{\@loadindica{tamil,tam}}
\def\@loadindica#1{\def\NeedsIndica{}\PassOptionsToPackage{#1}{indica}}


%%  for output from   `tamilize' or `tmilize'  preprocessors
\def\ds@tamilize{\IfFileExists{tamilmax}{\AtBeginDocument{\input{tamilmax}}%
 \def\tamilloaded{}}{\@latexerr{%
 The `tamilize' option requires  tamilmax.tex  and the  wntml10  font.}{}}}
%%
%%
\def\ds@tamil{\IfFileExists{tmlmacs}{\AtBeginDocument{\input{tmlmacs}\@loadtamil}}%
{\@latexerr{The `tamil',`adami',`wntml' options require the  tmlmacs.tex  macro file.^^J
 They also use the  mmtrmacs.tex  macro file and the  wntml10  font.}{}}}
\let\ds@wntml=\ds@tamil
\let\ds@adami=\ds@tamil
%
\def\@loadtamil{\def\tamilloaded{}\InputIfFileExists{mmtrmacs}{}{\@latexerr{%
 The file  mmtrmacs.tex  could not be found; transcriptions may fail.}{}}%
 \font\sevenrm=cmr7
 \font\twelvesl=cmsl12
 \font\twelvebf=cmbx12
 \font\seventeenbf=cmbx12 at 17pt 
}

\ProcessOptions*
\expandafter\ifx\csname NeedsIndica\endcsname\relax
  \else\expandafter\LoadIndica\expandafter\endinput\fi
\expandafter\ifx\csname tamilloaded\endcsname\relax\expandafter\ds@tamil\fi
\endinput