os/textandloc/fontservices/textshaperplugin/IcuSource/layout/IndicClassTables.cpp
author sl@SLION-WIN7.fritz.box
Fri, 15 Jun 2012 03:10:57 +0200
changeset 0 bde4ae8d615e
permissions -rw-r--r--
First public contribution.
     1 /*
     2  *
     3  * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
     4  *
     5  */
     6 
     7 #include "LETypes.h"
     8 #include "LEScripts.h"
     9 #include "OpenTypeTables.h"
    10 #include "OpenTypeUtilities.h"
    11 #include "IndicReordering.h"
    12 
    13 U_NAMESPACE_BEGIN
    14 
    15 #define ARRAY_SIZE(array) (sizeof array  / sizeof array[0])
    16 
    17 // Split matra table indices
    18 #define _x1  (1 << CF_INDEX_SHIFT)
    19 #define _x2  (2 << CF_INDEX_SHIFT)
    20 #define _x3  (3 << CF_INDEX_SHIFT)
    21 #define _x4  (4 << CF_INDEX_SHIFT)
    22 #define _x5  (5 << CF_INDEX_SHIFT)
    23 #define _x6  (6 << CF_INDEX_SHIFT)
    24 #define _x7  (7 << CF_INDEX_SHIFT)
    25 #define _x8  (8 << CF_INDEX_SHIFT)
    26 #define _x9  (9 << CF_INDEX_SHIFT)
    27 
    28 // simple classes
    29 #define _xx  (CC_RESERVED)
    30 #define _ma  (CC_VOWEL_MODIFIER | CF_POS_ABOVE)
    31 #define _mp  (CC_VOWEL_MODIFIER | CF_POS_AFTER)
    32 #define _sa  (CC_STRESS_MARK | CF_POS_ABOVE)
    33 #define _sb  (CC_STRESS_MARK | CF_POS_BELOW)
    34 #define _iv  (CC_INDEPENDENT_VOWEL)
    35 // Added by Nokia -- Devanagai independent vowel A -> special case
    36 #define _ia	 (CC_INDEPENDENT_VOWEL_A)
    37 
    38 #define _i2  (CC_INDEPENDENT_VOWEL_2)
    39 #define _ct  (CC_CONSONANT | CF_CONSONANT)
    40 #define _cn  (CC_CONSONANT_WITH_NUKTA | CF_CONSONANT)
    41 // Added by Nokia -- Special case Kannada and Bengali Ra to satisfy usecase (Initial)Ra + ZWJ + Virama + Consonant
    42 #define _cr  (CC_CONSONANT_KANNADA_BENGALI_RA | CF_CONSONANT)
    43 
    44 #define _nu  (CC_NUKTA)
    45 #define _dv  (CC_DEPENDENT_VOWEL)
    46 // Added by Nokia -- Devanagari vowel CANDRA E -> special case with independent vowel A
    47 #define _de	 (CC_DEPENDENT_VOWEL_CANDRA_E | CF_POS_ABOVE)
    48 
    49 // Added by Nokia -- Gurmukhi bearer ARA
    50 #define _ba  (CC_GUR_BEARER_A)
    51 // Added by Nokia -- Gurmukhi bearer IRI
    52 #define _bi  (CC_GUR_BEARER_I)
    53 // Added by Nokia -- Gurmukhi bearer URA
    54 #define _bu  (CC_GUR_BEARER_U)
    55 
    56 // Added by Nokia -- Gurmukhi dependent vowel which combined with bearer ARA to form an independent vowel
    57 #define _ga  (CC_GUR_DEPENDENT_VOWEL_A)
    58 // Added by Nokia -- Gurmukhi dependent vowel which combined with bearer IRI to form an independent vowel
    59 #define _gi  (CC_GUR_DEPENDENT_VOWEL_I)
    60 // Added by Nokia -- Gurmukhi dependent vowel which combined with bearer URA to form an independent vowel
    61 #define _gu  (CC_GUR_DEPENDENT_VOWEL_U)
    62 
    63 #define _gar (_ga | CF_POS_AFTER)
    64 #define _gaa (_ga | CF_POS_ABOVE)
    65 #define _gil (_gi | CF_POS_BEFORE)
    66 #define _gir (_gi | CF_POS_AFTER)
    67 #define _gia (_gi | CF_POS_ABOVE)
    68 #define _gub (_gu | CF_POS_BELOW)
    69 #define _gua (_gu | CF_POS_ABOVE)
    70 
    71 #define _dl  (_dv | CF_POS_BEFORE)
    72 #define _db  (_dv | CF_POS_BELOW)
    73 #define _da  (_dv | CF_POS_ABOVE)
    74 #define _dr  (_dv | CF_POS_AFTER)
    75 #define _lm  (_dv | CF_LENGTH_MARK)
    76 #define _l1  (CC_SPLIT_VOWEL_PIECE_1 | CF_POS_BEFORE)
    77 #define _a1  (CC_SPLIT_VOWEL_PIECE_1 | CF_POS_ABOVE)
    78 #define _r2  (CC_SPLIT_VOWEL_PIECE_2 | CF_POS_AFTER)
    79 #define _m2  (CC_SPLIT_VOWEL_PIECE_2 | CF_LENGTH_MARK)
    80 #define _m3  (CC_SPLIT_VOWEL_PIECE_3 | CF_LENGTH_MARK)
    81 #define _vr  (CC_VIRAMA)
    82 
    83 // split matras
    84 #define _s1  (_dv | _x1)
    85 #define _s2  (_dv | _x2)
    86 #define _s3  (_dv | _x3)
    87 #define _s4  (_dv | _x4)
    88 #define _s5  (_dv | _x5)
    89 #define _s6  (_dv | _x6)
    90 #define _s7  (_dv | _x7)
    91 #define _s8  (_dv | _x8)
    92 #define _s9  (_dv | _x9)
    93 
    94 // consonants with special forms
    95 // NOTE: this assumes that no consonants with nukta have
    96 // special forms... (Bengali RA?)
    97 #define _bb  (_ct | CF_BELOW_BASE)
    98 #define _pb  (_ct | CF_POST_BASE)
    99 #define _vt  (_bb | CF_VATTU)
   100 #define _rv  (_vt | CF_REPH)
   101 #define _rp  (_pb | CF_REPH)
   102 #define _rb  (_bb | CF_REPH)
   103 
   104 // Added by Nokia -- for Kannada Ra & Bengali Ra
   105 #define _b2  (_cr | CF_BELOW_BASE)
   106 #define _kr  (_b2 | CF_REPH)
   107 
   108 // Added by Nokia -- for Bengali Ya
   109 #define _by  (_pb | CF_CONSONANT_BENGALI_YA)
   110 
   111 // Added by Nokia -- for Tamil independent vowel O
   112 #define _to  (CC_INDEPENDENT_VOWEL_TAMIL_O | CF_POS_AFTER)
   113 
   114 // Added by Nokia -- for Malayalam CHILLU
   115 #define _pbc  (_pb | CF_CONSONANT_MLYL_CHILLU)
   116 #define _bbc  (_bb | CF_CONSONANT_MLYL_CHILLU)
   117 #define _ctc  (_ct | CF_CONSONANT_MLYL_CHILLU)
   118 
   119 //
   120 // Character class tables
   121 //
   122 static const IndicClassTable::CharClass devaCharClasses[] =
   123 {
   124     _xx, _ma, _ma, _mp, _iv, _ia, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, // 0900 - 090F
   125     _iv, _iv, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0910 - 091F
   126     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _ct, // 0920 - 092F
   127     _rv, _cn, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0930 - 093F
   128     _dr, _db, _db, _db, _db, _de, _da, _da, _da, _dr, _dr, _dr, _dr, _vr, _xx, _xx, // 0940 - 094F
   129     _xx, _sa, _sb, _sa, _sa, _xx, _xx, _xx, _cn, _cn, _cn, _cn, _cn, _cn, _cn, _cn, // 0950 - 095F
   130     _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0960 - 096F
   131     _xx                                                                             // 0970
   132 };
   133 
   134 // Nokia: Changed 09AF character from _pb to _by which represents a Bengali Ya which may or may not take
   135 // post base form, depending on its position within a consonant cluster.
   136 // Also changed 09B0 from _rb to special case _kr to satiisfy the usecase Ra + ZWJ + Virama + Consonant.
   137 // Changed 09E2 and 09E3 to _db here, not _dv since the Bengali rendering rules want them below
   138 // the base consonant.
   139 static const IndicClassTable::CharClass bengCharClasses[] =
   140 {
   141     _xx, _ma, _mp, _mp, _xx, _i2, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _i2, // 0980 - 098F
   142     _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0990 - 099F
   143     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _bb, _ct, _ct, _by, // 09A0 - 09AF
   144     _kr, _xx, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _r2, _dl, // 09B0 - 09BF
   145     _dr, _db, _db, _db, _db, _xx, _xx, _l1, _dl, _xx, _xx, _s1, _s2, _vr, _xx, _xx, // 09C0 - 09CF
   146     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 09D0 - 09DF
   147     _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 09E0 - 09EF
   148     _ct, _ct, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx                           // 09F0 - 09FA
   149 };
   150 
   151 // Nokia: Changed 0A05 from _iv to _ba and 0A72&0A73 from _ct to _bi&_bu, changed 0A3E,0A48&0A4C
   152 // from _d* to _ga*, 0A3F,0A40&0A47 from _d* to _gi*, 0A41,0A42&0A4B from _d* to _gu* to support 
   153 // decompositions of the independent vowels into a sequence of a vowel bearer and a depending vowel sign.
   154 // Also changed 0A2F from _bb to _pb since YA is expected to post-base when combined in constant cluster. 
   155 static const IndicClassTable::CharClass punjCharClasses[] =
   156 {
   157     _xx, _ma, _ma, _mp, _xx, _ba, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _xx, _iv, // 0A00 - 0A0F
   158     _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A10 - 0A1F
   159     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _pb, // 0A20 - 0A2F
   160     _vt, _xx, _ct, _cn, _xx, _bb, _cn, _xx, _ct, _bb, _xx, _xx, _nu, _xx, _gar, _gil, // 0A30 - 0A3F
   161     _gir, _gub, _gub, _xx, _xx, _xx, _xx, _gia, _gaa, _xx, _xx, _gua, _gaa, _vr, _xx, _xx, // 0A40 - 0A4F
   162     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _cn, _cn, _cn, _ct, _xx, _cn, _xx, // 0A50 - 0A5F
   163     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0A60 - 0A6F
   164     _ma, _ma, _bi, _bu, _xx                                                         // 0A70 - 0A74
   165 };
   166 
   167 static const IndicClassTable::CharClass gujrCharClasses[] =
   168 {
   169     _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _xx, _iv, // 0A80 - 0A8F
   170     _iv, _iv, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A90 - 0A9F
   171     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0AA0 - 0AAF
   172     _rv, _xx, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0AB0 - 0ABF
   173     _dr, _db, _db, _db, _db, _da, _xx, _da, _da, _dr, _xx, _dr, _dr, _vr, _xx, _xx, // 0AC0 - 0ACF
   174     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0AD0 - 0ADF
   175     _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0AE0 - 0AEF
   176 };
   177 
   178 static const IndicClassTable::CharClass oryaCharClasses[] =
   179 {
   180     _xx, _ma, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, // 0B00 - 0B0F
   181     _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0B10 - 0B1F
   182     _ct, _ct, _ct, _ct, _bb, _ct, _ct, _ct, _bb, _xx, _ct, _ct, _bb, _bb, _bb, _pb, // 0B20 - 0B2F
   183     _rb, _xx, _bb, _bb, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _r2, _da, // 0B30 - 0B3F
   184     _dr, _db, _db, _db, _xx, _xx, _xx, _l1, _s1, _xx, _xx, _s2, _s3, _vr, _xx, _xx, // 0B40 - 0B4F
   185     _xx, _xx, _xx, _xx, _xx, _xx, _m2, _m2, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 0B50 - 0B5F
   186     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0B60 - 0B6F
   187     _xx, _ct                                                                        // 0B70 - 0B71
   188 };
   189 
   190 // Nokia: Changed 0B92 to _to for the exceptional case of Tamil independent vowel O
   191 static const IndicClassTable::CharClass tamlCharClasses[] =
   192 {
   193     _xx, _xx, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _iv, _iv, // 0B80 - 0B8F
   194     _iv, _xx, _to, _iv, _iv, _ct, _xx, _xx, _xx, _ct, _ct, _xx, _ct, _xx, _ct, _ct, // 0B90 - 0B9F
   195     _xx, _xx, _xx, _ct, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _ct, _ct, // 0BA0 - 0BAF
   196     _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0BB0 - 0BBF
   197     _da, _dr, _dr, _xx, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0BC0 - 0BCF
   198     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BD0 - 0BDF
   199     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BE0 - 0BEF
   200     _xx, _xx, _xx                                                                   // 0BF0 - 0BF2
   201 };
   202 
   203 // FIXME: Should some of the bb's be pb's? (KA, NA, MA, YA, VA, etc. (approx 13))
   204 // Nokia: Changed 0C31 character to _bb as with _ct the consonant cluster is not rendered correctly.
   205 static const IndicClassTable::CharClass teluCharClasses[] =
   206 {
   207     _xx, _mp, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C00 - 0C0F
   208     _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C10 - 0C1F
   209     _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0C20 - 0C2F
   210     _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _da, _da, // 0C30 - 0C3F
   211     _da, _dr, _dr, _dr, _dr, _xx, _a1, _da, _s1, _xx, _da, _da, _da, _vr, _xx, _xx, // 0C40 - 0C4F
   212     _xx, _xx, _xx, _xx, _xx, _da, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0C50 - 0C5F
   213     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0C60 - 0C6F
   214 };
   215 
   216 // U+CC3 and U+CC4 are _lm here not _dr since the Kannada rendering
   217 // rules want them below and to the right of the entire cluster
   218 //
   219 // There's some information about this in:
   220 //
   221 //  http://brahmi.sourceforge.net/docs/KannadaComputing.html
   222 
   223 // Nokia: Changed 0CBC character class to _nu (NUKTA), as post Unicode 4.0, this
   224 // code point is classified as the Kannada NUKTA character.
   225 // Also changed 0CB0 from _rb to special case _cr to satiisfy the usecase Ra + ZWJ + Virama + Consonant
   226 // see _cr and _rb above
   227 static const IndicClassTable::CharClass kndaCharClasses[] =
   228 {
   229     _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C80 - 0C8F
   230     _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C90 - 0C9F
   231     _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0CA0 - 0CAF
   232     _kr, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _nu, _xx, _dr, _da, // 0CB0 - 0CBF
   233     _s1, _dr, _r2, _lm, _lm, _xx, _a1, _s2, _s3, _xx, _s4, _s5, _da, _vr, _xx, _xx, // 0CC0 - 0CCF
   234     _xx, _xx, _xx, _xx, _xx, _m3, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _bb, _xx, // 0CD0 - 0CDF
   235     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0CE0 - 0CEF
   236 };
   237 
   238 // FIXME: this is correct for old-style Malayalam (MAL) but not for reformed Malayalam (MLR)
   239 // FIXME: should there be a REPH for old-style Malayalam?
   240 static const IndicClassTable::CharClass mlymCharClasses[] =
   241 {
   242     _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0D00 - 0D0F
   243 //    _iv, _xx, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _bb, // 0D10 - 0D1F //old
   244     _iv, _xx, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0D10 - 0D1F
   245 //    _ct, _ct, _ct, _bb, _ct, _bb, _bb, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _pb, // 0D20 - 0D2F //old
   246     _ct, _ct, _ct, _ctc, _ct, _ct, _ct, _ct, _ctc, _xx, _ct, _ct, _ct, _ct, _ct, _pb, // 0D20 - 0D2F 
   247 //    _pb, _cn, _bb, _ct, _ct, _pb, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0D30 - 0D3F //old
   248     _pbc, _cn, _bbc, _ctc, _ct, _pb, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0D30 - 0D3F 
   249     _dr, _dr, _dr, _dr, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0D40 - 0D4F
   250     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0D50 - 0D5F
   251     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0D60 - 0D6F
   252 };
   253 
   254 //
   255 // Split matra tables
   256 //
   257 static const SplitMatra bengSplitTable[] = {{0x09C7, 0x09BE}, {0x09C7, 0x09D7}};
   258 
   259 static const SplitMatra oryaSplitTable[] = {{0x0B47, 0x0B56}, {0x0B47, 0x0B3E}, {0x0B47, 0x0B57}};
   260 
   261 static const SplitMatra tamlSplitTable[] = {{0x0BC6, 0x0BBE}, {0x0BC7, 0x0BBE}, {0x0BC6, 0x0BD7}};
   262 
   263 static const SplitMatra teluSplitTable[] = {{0x0C46, 0x0C56}};
   264 
   265 static const SplitMatra kndaSplitTable[] = {{0x0CBF, 0x0CD5}, {0x0CC6, 0x0CD5}, {0x0CC6, 0x0CD6}, {0x0CC6, 0x0CC2},
   266                                    {0x0CC6, 0x0CC2, 0x0CD5}};
   267 
   268 static const SplitMatra mlymSplitTable[] = {{0x0D46, 0x0D3E}, {0x0D47, 0x0D3E}, {0x0D46, 0x0D57}};
   269 
   270 //
   271 // Script Flags
   272 //
   273 
   274 // FIXME: post 'GSUB' reordering of MATRA_PRE's for Malayalam and Tamil
   275 // FIXME: reformed Malayalam needs to reorder VATTU to before base glyph...
   276 // FIXME: eyelash RA only for Devanagari??
   277 #define DEVA_SCRIPT_FLAGS (SF_EYELASH_RA | SF_NO_POST_BASE_LIMIT)
   278 #define BENG_SCRIPT_FLAGS (SF_REPH_AFTER_BELOW | SF_NO_POST_BASE_LIMIT)
   279 #define PUNJ_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT | SF_MATRAS_AFTER_POSTBASE)
   280 #define GUJR_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT)
   281 #define ORYA_SCRIPT_FLAGS (SF_REPH_AFTER_BELOW | SF_NO_POST_BASE_LIMIT)
   282 #define TAML_SCRIPT_FLAGS (SF_MPRE_FIXUP | SF_NO_POST_BASE_LIMIT)
   283 #define TELU_SCRIPT_FLAGS (SF_MATRAS_AFTER_BASE | 3)
   284 #define KNDA_SCRIPT_FLAGS (SF_MATRAS_AFTER_BASE | 3)
   285 #define MLYM_SCRIPT_FLAGS (SF_MPRE_FIXUP | SF_NO_POST_BASE_LIMIT)
   286 
   287 //
   288 // Indic Class Tables
   289 //
   290 static const IndicClassTable devaClassTable = {0x0900, 0x0970, 2, DEVA_SCRIPT_FLAGS, devaCharClasses, NULL};
   291 
   292 static const IndicClassTable bengClassTable = {0x0980, 0x09FA, 3, BENG_SCRIPT_FLAGS, bengCharClasses, bengSplitTable};
   293 
   294 static const IndicClassTable punjClassTable = {0x0A00, 0x0A74, 2, PUNJ_SCRIPT_FLAGS, punjCharClasses, NULL};
   295 
   296 static const IndicClassTable gujrClassTable = {0x0A80, 0x0AEF, 2, GUJR_SCRIPT_FLAGS, gujrCharClasses, NULL};
   297 
   298 static const IndicClassTable oryaClassTable = {0x0B00, 0x0B71, 3, ORYA_SCRIPT_FLAGS, oryaCharClasses, oryaSplitTable};
   299 
   300 static const IndicClassTable tamlClassTable = {0x0B80, 0x0BF2, 3, TAML_SCRIPT_FLAGS, tamlCharClasses, tamlSplitTable};
   301 
   302 static const IndicClassTable teluClassTable = {0x0C00, 0x0C6F, 3, TELU_SCRIPT_FLAGS, teluCharClasses, teluSplitTable};
   303 
   304 static const IndicClassTable kndaClassTable = {0x0C80, 0x0CEF, 4, KNDA_SCRIPT_FLAGS, kndaCharClasses, kndaSplitTable};
   305 
   306 static const IndicClassTable mlymClassTable = {0x0D00, 0x0D6F, 3, MLYM_SCRIPT_FLAGS, mlymCharClasses, mlymSplitTable};
   307 
   308 //
   309 // IndicClassTable addresses
   310 //
   311 static const IndicClassTable * const indicClassTables[] = {
   312     NULL,            /* 'zyyy' (COMMON) */
   313     NULL,            /* 'qaai' (INHERITED) */
   314     NULL,            /* 'arab' (ARABIC) */
   315     NULL,            /* 'armn' (ARMENIAN) */
   316     &bengClassTable, /* 'beng' (BENGALI) */
   317     NULL,            /* 'bopo' (BOPOMOFO) */
   318     NULL,            /* 'cher' (CHEROKEE) */
   319     NULL,            /* 'qaac' (COPTIC) */
   320     NULL,            /* 'cyrl' (CYRILLIC) */
   321     NULL,            /* 'dsrt' (DESERET) */
   322     &devaClassTable, /* 'deva' (DEVANAGARI) */
   323     NULL,            /* 'ethi' (ETHIOPIC) */
   324     NULL,            /* 'geor' (GEORGIAN) */
   325     NULL,            /* 'goth' (GOTHIC) */
   326     NULL,            /* 'grek' (GREEK) */
   327     &gujrClassTable, /* 'gujr' (GUJARATI) */
   328     &punjClassTable, /* 'guru' (GURMUKHI) */
   329     NULL,            /* 'hani' (HAN) */
   330     NULL,            /* 'hang' (HANGUL) */
   331     NULL,            /* 'hebr' (HEBREW) */
   332     NULL,            /* 'hira' (HIRAGANA) */
   333     &kndaClassTable, /* 'knda' (KANNADA) */
   334     NULL,            /* 'kata' (KATAKANA) */
   335     NULL,            /* 'khmr' (KHMER) */
   336     NULL,            /* 'laoo' (LAO) */
   337     NULL,            /* 'latn' (LATIN) */
   338     &mlymClassTable, /* 'mlym' (MALAYALAM) */
   339     NULL,            /* 'mong' (MONGOLIAN) */
   340     NULL,            /* 'mymr' (MYANMAR) */
   341     NULL,            /* 'ogam' (OGHAM) */
   342     NULL,            /* 'ital' (OLD-ITALIC) */
   343     &oryaClassTable, /* 'orya' (ORIYA) */
   344     NULL,            /* 'runr' (RUNIC) */
   345     NULL,            /* 'sinh' (SINHALA) */
   346     NULL,            /* 'syrc' (SYRIAC) */
   347     &tamlClassTable, /* 'taml' (TAMIL) */
   348     &teluClassTable, /* 'telu' (TELUGU) */
   349     NULL,            /* 'thaa' (THAANA) */
   350     NULL,            /* 'thai' (THAI) */
   351     NULL,            /* 'tibt' (TIBETAN) */
   352     NULL,            /* 'cans' (CANADIAN-ABORIGINAL) */
   353     NULL,            /* 'yiii' (YI) */
   354     NULL,            /* 'tglg' (TAGALOG) */
   355     NULL,            /* 'hano' (HANUNOO) */
   356     NULL,            /* 'buhd' (BUHID) */
   357     NULL,            /* 'tagb' (TAGBANWA) */
   358     NULL,            /* 'brai' (BRAILLE) */
   359     NULL,            /* 'cprt' (CYPRIOT) */
   360     NULL,            /* 'limb' (LIMBU) */
   361     NULL,            /* 'linb' (LINEAR_B) */
   362     NULL,            /* 'osma' (OSMANYA) */
   363     NULL,            /* 'shaw' (SHAVIAN) */
   364     NULL,            /* 'tale' (TAI_LE) */
   365     NULL,            /* 'ugar' (UGARITIC) */
   366     NULL             /* 'hrkt' (KATAKANA_OR_HIRAGANA) */
   367 };
   368 
   369 IndicClassTable::CharClass IndicClassTable::getCharClass(LEUnicode ch) const
   370 {
   371     if (ch == C_SIGN_ZWJ) {
   372         return CF_CONSONANT | CC_ZERO_WIDTH_MARK;
   373     }
   374 
   375     if (ch == C_SIGN_ZWNJ) {
   376         return CC_ZERO_WIDTH_MARK;
   377     }
   378 
   379     if (ch < firstChar || ch > lastChar) {
   380         return CC_RESERVED;
   381     }
   382 
   383     return classTable[ch - firstChar];
   384 }
   385 
   386 const IndicClassTable *IndicClassTable::getScriptClassTable(le_int32 scriptCode)
   387 {
   388     if (scriptCode < 0 || scriptCode >= scriptCodeCount) {
   389         return NULL;
   390     }
   391 
   392     return indicClassTables[scriptCode];
   393 }
   394 
   395 le_int32 IndicReordering::getWorstCaseExpansion(le_int32 scriptCode)
   396 {
   397     const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode);
   398 
   399     if (classTable == NULL) {
   400         return 1;
   401     }
   402 
   403     return classTable->getWorstCaseExpansion();
   404 }
   405 
   406 U_NAMESPACE_END