# ***************************************************************************
# *
# *  Copyright (C) 2007-2012 Apple, Inc.All Rights Reserved.
# *
# ***************************************************************************
#
$bs = \u005C;
$ZWNJ = \u200C; 
$kssa = \u0BBD;

#independent vowel
$A = \u0B85; 
$AA = \u0B86; 
$I = \u0B87; 
$II = \u0B88; 
$U = \u0B89; 
$UU = \u0B8A; 
$E = \u0B8E; 
$EE = \u0B8F; 
$AI = \u0B90; 
$O = \u0B92; 
$OO = \u0B93; 
$AU = \u0B94;
# matras
$aa = \u0BBE; 
$i = \u0BBF;
$ii = \u0BC0;
$u = \u0BC1;
$uu = \u0BC2;
$e = \u0BC6;
$ee = \u0BC7;
$ai = \u0BC8;
$o = \u0BCA;
$oo = \u0BCB;
$au = \u0BCC;
$pulli=\u0BCD;
$consonant = [க-ஹ $kssa];
$matra = [\u0BBE-\u0BCC];
$baseVowel = [\u0B85-\u0B94];
$noPulli = [^$pulli];

#
# consonant-consonant rules
#

$noPulli{ க க > க $pulli க;
$noPulli{ $kssa $kssa > | $kssa $pulli $kssa;   # kssa must still be converted
$noPulli{ ங ங > ங $pulli ங;
$noPulli{ ங க > ங $pulli க;
$noPulli{ ச ச > ச $pulli ச;
$noPulli{ ஜ ஜ > ஜ $pulli ஜ;
$noPulli{ ஞ ஞ > ஞ $pulli ஞ;
$noPulli{ ஞ ச > ஞ $pulli ச;
$noPulli{ ட ட > ட $pulli ட;
$noPulli{ ண ண > ண $pulli ண;
$noPulli{ ண ட > ண $pulli ட;
$noPulli{ த த > த $pulli த;
$noPulli{ ந ந > ந $pulli ந;
$noPulli{ ந த > ந $pulli த;
$noPulli{ ன ன > ன $pulli ன;
$noPulli{ ன ற > ன $pulli ற;
$noPulli{ ப ப > ப $pulli ப;
$noPulli{ ம ம > ம $pulli ம;
$noPulli{ ம ப > ம $pulli ப;
$noPulli{ ய ய > ய $pulli ய;
$noPulli{ ர ர > ர $pulli ர;
$noPulli{ ற ற > ற $pulli ற;
$noPulli{ ல ல > ல $pulli ல;
$noPulli{ ள ள > ள $pulli ள;
$noPulli{ ழ ழ > ழ $pulli ழ;
$noPulli{ வ வ > வ $pulli வ;
$noPulli{ ஶ ஶ > ஶ $pulli ஶ;	#sha 
$noPulli{ ஷ ஷ > ஷ $pulli ஷ;
$noPulli{ ஸ ஸ > ஸ $pulli ஸ;
$noPulli{ ஹ ஹ > ஹ $pulli ஹ;

$kssa <> க $pulli ஷ;
க $pulli ஷ <> க $pulli $ZWNJ ஷ;

#
# base vowel to matra
#
$consonant { $A ($baseVowel) > $1;
$consonant { $A <> $consonant { } [$consonant $baseVowel];
$consonant { $AA <> $consonant { $aa;
$consonant { $AI <> $consonant { $ai;
$consonant { $AU <> $consonant { $au;
$consonant { $I <> $consonant { $i;
$consonant { $II <> $consonant { $ii;
$consonant { $U <> $consonant { $u;
$consonant { $UU <> $consonant { $uu;
$consonant { $E <> $consonant { $e;
$consonant { $EE <> $consonant { $ee;
$consonant { $O <> $consonant { $o;
$consonant { $OO <> $consonant { $oo;

# stand alone matra rules
# preceeding a vowel with backslash
# forces matra form
$bs $AA <> $aa;
$bs $AI <> $ai;
$bs $AU <> $au;
$bs $II <> $ii;
$bs $I <> $i;
$bs $UU <> $uu;
$bs $U <> $u;
$bs $EE <> $ee;
$bs $E <> $e;
$bs $OO <> $oo;
$bs $O <> $o;