icuSources/layout/IndicClassTables.cpp

   1 /*
   2  *
   3  * (C) Copyright IBM Corp. 1998-2004 - 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 enum
  18 {
  19     // Split matra table indices
  20     _x1 = 1 << IndicClassTable::CF_INDEX_SHIFT,
  21     _x2 = 2 << IndicClassTable::CF_INDEX_SHIFT,
  22     _x3 = 3 << IndicClassTable::CF_INDEX_SHIFT,
  23     _x4 = 4 << IndicClassTable::CF_INDEX_SHIFT,
  24     _x5 = 5 << IndicClassTable::CF_INDEX_SHIFT,
  25     _x6 = 6 << IndicClassTable::CF_INDEX_SHIFT,
  26     _x7 = 7 << IndicClassTable::CF_INDEX_SHIFT,
  27     _x8 = 8 << IndicClassTable::CF_INDEX_SHIFT,
  28     _x9 = 9 << IndicClassTable::CF_INDEX_SHIFT,
  29
  30     // simple classes
  31     _xx = IndicClassTable::CC_RESERVED,
  32     _ma = IndicClassTable::CC_VOWEL_MODIFIER | IndicClassTable::CF_POS_ABOVE,
  33     _mp = IndicClassTable::CC_VOWEL_MODIFIER | IndicClassTable::CF_POS_AFTER,
  34     _sa = IndicClassTable::CC_STRESS_MARK | IndicClassTable::CF_POS_ABOVE,
  35     _sb = IndicClassTable::CC_STRESS_MARK | IndicClassTable::CF_POS_BELOW,
  36     _iv = IndicClassTable::CC_INDEPENDENT_VOWEL,
  37     _i2 = IndicClassTable::CC_INDEPENDENT_VOWEL_2,
  38     _ct = IndicClassTable::CC_CONSONANT | IndicClassTable::CF_CONSONANT,
  39     _cn = IndicClassTable::CC_CONSONANT_WITH_NUKTA | IndicClassTable::CF_CONSONANT,
  40     _nu = IndicClassTable::CC_NUKTA,
  41     _dv = IndicClassTable::CC_DEPENDENT_VOWEL,
  42     _dl = _dv | IndicClassTable::CF_POS_BEFORE,
  43     _db = _dv | IndicClassTable::CF_POS_BELOW,
  44     _da = _dv | IndicClassTable::CF_POS_ABOVE,
  45     _dr = _dv | IndicClassTable::CF_POS_AFTER,
  46     _lm = _dv | IndicClassTable::CF_LENGTH_MARK,
  47     _l1 = IndicClassTable::CC_SPLIT_VOWEL_PIECE_1 | IndicClassTable::CF_POS_BEFORE,
  48     _a1 = IndicClassTable::CC_SPLIT_VOWEL_PIECE_1 | IndicClassTable::CF_POS_ABOVE,
  49     _r2 = IndicClassTable::CC_SPLIT_VOWEL_PIECE_2 | IndicClassTable::CF_POS_AFTER,
  50     _m2 = IndicClassTable::CC_SPLIT_VOWEL_PIECE_2 | IndicClassTable::CF_LENGTH_MARK,
  51     _m3 = IndicClassTable::CC_SPLIT_VOWEL_PIECE_3 | IndicClassTable::CF_LENGTH_MARK,
  52     _vr = IndicClassTable::CC_VIRAMA,
  53
  54     // split matras
  55     _s1 = _dv | _x1,
  56     _s2 = _dv | _x2,
  57     _s3 = _dv | _x3,
  58     _s4 = _dv | _x4,
  59     _s5 = _dv | _x5,
  60     _s6 = _dv | _x6,
  61     _s7 = _dv | _x7,
  62     _s8 = _dv | _x8,
  63     _s9 = _dv | _x9,
  64
  65     // consonants with special forms
  66     // NOTE: this assumes that no consonants with nukta have
  67     // special forms... (Bengali RA?)
  68     _bb = _ct | IndicClassTable::CF_BELOW_BASE,
  69     _pb = _ct | IndicClassTable::CF_POST_BASE,
  70     _vt = _bb | IndicClassTable::CF_VATTU,
  71     _rv = _vt | IndicClassTable::CF_REPH,
  72     _rp = _pb | IndicClassTable::CF_REPH,
  73     _rb = _bb | IndicClassTable::CF_REPH
  74 };
  75
  76 //
  77 // Character class tables
  78 //
  79 static const IndicClassTable::CharClass devaCharClasses[] =
  80 {
  81     _xx, _ma, _ma, _mp, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, // 0900 - 090F
  82     _iv, _iv, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0910 - 091F
  83     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _ct, // 0920 - 092F
  84     _rv, _cn, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0930 - 093F
  85     _dr, _db, _db, _db, _db, _da, _da, _da, _da, _dr, _dr, _dr, _dr, _vr, _xx, _xx, // 0940 - 094F
  86     _xx, _sa, _sb, _sa, _sa, _xx, _xx, _xx, _cn, _cn, _cn, _cn, _cn, _cn, _cn, _cn, // 0950 - 095F
  87     _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0960 - 096F
  88     _xx                                                                             // 0970
  89 };
  90
  91 static const IndicClassTable::CharClass bengCharClasses[] =
  92 {
  93     _xx, _ma, _mp, _mp, _xx, _i2, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _i2, // 0980 - 098F
  94     _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0990 - 099F
  95     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _bb, _ct, _ct, _pb, // 09A0 - 09AF
  96     _rv, _xx, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _r2, _dl, // 09B0 - 09BF
  97     _dr, _db, _db, _db, _db, _xx, _xx, _l1, _dl, _xx, _xx, _s1, _s2, _vr, _xx, _xx, // 09C0 - 09CF
  98     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 09D0 - 09DF
  99     _iv, _iv, _dv, _dv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 09E0 - 09EF
 100     _ct, _ct, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx                           // 09F0 - 09FA
 101 };
 102
 103 static const IndicClassTable::CharClass punjCharClasses[] =
 104 {
 105     _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _xx, _iv, // 0A00 - 0A0F
 106     _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A10 - 0A1F
 107     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _bb, // 0A20 - 0A2F
 108     _vt, _xx, _ct, _ct, _xx, _bb, _ct, _xx, _ct, _bb, _xx, _xx, _nu, _xx, _dr, _dl, // 0A30 - 0A3F
 109     _dr, _db, _db, _xx, _xx, _xx, _xx, _da, _da, _xx, _xx, _da, _da, _vr, _xx, _xx, // 0A40 - 0A4F
 110     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _cn, _cn, _cn, _cn, _xx, _cn, _xx, // 0A50 - 0A5F
 111     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0A60 - 0A6F
 112     _ma, _ma, _ct, _ct, _xx                                                         // 0A70 - 0A74
 113 };
 114
 115 static const IndicClassTable::CharClass gujrCharClasses[] =
 116 {
 117     _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _xx, _iv, // 0A80 - 0A8F
 118     _iv, _iv, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A90 - 0A9F
 119     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0AA0 - 0AAF
 120     _rv, _xx, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0AB0 - 0ABF
 121     _dr, _db, _db, _db, _db, _da, _xx, _da, _da, _dr, _xx, _dr, _dr, _vr, _xx, _xx, // 0AC0 - 0ACF
 122     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0AD0 - 0ADF
 123     _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0AE0 - 0AEF
 124 };
 125
 126 static const IndicClassTable::CharClass oryaCharClasses[] =
 127 {
 128     _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, // 0B00 - 0B0F
 129     _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0B10 - 0B1F
 130     _ct, _ct, _ct, _ct, _bb, _ct, _ct, _ct, _bb, _xx, _ct, _ct, _bb, _bb, _bb, _pb, // 0B20 - 0B2F
 131     _rv, _xx, _bb, _bb, _xx, _xx, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _r2, _da, // 0B30 - 0B3F
 132     _dr, _db, _db, _db, _xx, _xx, _xx, _l1, _s1, _xx, _xx, _s2, _s3, _vr, _xx, _xx, // 0B40 - 0B4F
 133     _xx, _xx, _xx, _xx, _xx, _xx, _m2, _m2, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 0B50 - 0B5F
 134     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0B60 - 0B6F
 135     _xx                                                                             // 0B70
 136 };
 137
 138 static const IndicClassTable::CharClass tamlCharClasses[] =
 139 {
 140     _xx, _xx, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _iv, _iv, // 0B80 - 0B8F
 141     _iv, _xx, _iv, _iv, _iv, _ct, _xx, _xx, _xx, _ct, _ct, _xx, _ct, _xx, _ct, _ct, // 0B90 - 0B9F
 142     _xx, _xx, _xx, _ct, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _ct, _ct, // 0BA0 - 0BAF
 143     _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0BB0 - 0BBF
 144     _da, _dr, _dr, _xx, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0BC0 - 0BCF
 145     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BD0 - 0BDF
 146     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BE0 - 0BEF
 147     _xx, _xx, _xx                                                                   // 0BF0 - 0BF2
 148 };
 149
 150 // FIXME: Should some of the bb's be pb's? (KA, NA, MA, YA, VA, etc. (approx 13))
 151 static const IndicClassTable::CharClass teluCharClasses[] =
 152 {
 153     _xx, _mp, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C00 - 0C0F
 154     _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C10 - 0C1F
 155     _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0C20 - 0C2F
 156     _bb, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _da, _da, // 0C30 - 0C3F
 157     _da, _dr, _dr, _dr, _dr, _xx, _a1, _da, _s1, _xx, _da, _da, _da, _vr, _xx, _xx, // 0C40 - 0C4F
 158     _xx, _xx, _xx, _xx, _xx, _da, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0C50 - 0C5F
 159     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0C60 - 0C6F
 160 };
 161
 162 // U+CC3 and U+CC4 are _lm here not _dr since the Kannada rendering
 163 // rules want them below and to the right of the entire cluster
 164 //
 165 // There's some information about this in:
 166 //
 167 //  http://brahmi.sourceforge.net/docs/KannadaComputing.html
 168 static const IndicClassTable::CharClass kndaCharClasses[] =
 169 {
 170     _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, // 0C80 - 0C8F
 171     _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C90 - 0C9F
 172     _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0CA0 - 0CAF
 173     _rb, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _dr, _da, // 0CB0 - 0CBF
 174     _s1, _dr, _r2, _lm, _lm, _xx, _a1, _s2, _s3, _xx, _s4, _s5, _da, _vr, _xx, _xx, // 0CC0 - 0CCF
 175     _xx, _xx, _xx, _xx, _xx, _m3, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _ct, _xx, // 0CD0 - 0CDF
 176     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0CE0 - 0CEF
 177 };
 178
 179 // FIXME: this is correct for old-style Malayalam (MAL) but not for reformed Malayalam (MLR)
 180 // FIXME: should there be a REPH for old-style Malayalam?
 181 static const IndicClassTable::CharClass mlymCharClasses[] =
 182 {
 183     _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0D00 - 0D0F
 184     _iv, _xx, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _bb, // 0D10 - 0D1F
 185     _ct, _ct, _ct, _bb, _ct, _bb, _bb, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _pb, // 0D20 - 0D2F
 186     _pb, _cn, _bb, _ct, _ct, _pb, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0D30 - 0D3F
 187     _dr, _dr, _dr, _dr, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0D40 - 0D4F
 188     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0D50 - 0D5F
 189     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0D60 - 0D6F
 190 };
 191
 192 //
 193 // Split matra tables
 194 //
 195 static const SplitMatra bengSplitTable[] = {{0x09C7, 0x09BE}, {0x09C7, 0x09D7}};
 196
 197 static const SplitMatra oryaSplitTable[] = {{0x0B47, 0x0B56}, {0x0B47, 0x0B3E}, {0x0B47, 0x0B57}};
 198
 199 static const SplitMatra tamlSplitTable[] = {{0x0BC6, 0x0BBE}, {0x0BC7, 0x0BBE}, {0x0BC6, 0x0BD7}};
 200
 201 static const SplitMatra teluSplitTable[] = {{0x0C46, 0x0C56}};
 202
 203 static const SplitMatra kndaSplitTable[] = {{0x0CBF, 0x0CD5}, {0x0CC6, 0x0CD5}, {0x0CC6, 0x0CD6}, {0x0CC6, 0x0CC2},
 204                                    {0x0CC6, 0x0CC2, 0x0CD5}};
 205
 206 static const SplitMatra mlymSplitTable[] = {{0x0D46, 0x0D3E}, {0x0D47, 0x0D3E}, {0x0D46, 0x0D57}};
 207
 208 //
 209 // Script Flags
 210 //
 211
 212 // FIXME: post 'GSUB' reordering of MATRA_PRE's for Malayalam and Tamil
 213 // FIXME: reformed Malayalam needs to reorder VATTU to before base glyph...
 214 // FIXME: eyelash RA only for Devanagari??
 215 #define DEVA_SCRIPT_FLAGS (IndicClassTable::SF_EYELASH_RA | IndicClassTable::SF_NO_POST_BASE_LIMIT)
 216 #define BENG_SCRIPT_FLAGS (IndicClassTable::SF_REPH_AFTER_BELOW | IndicClassTable::SF_NO_POST_BASE_LIMIT)
 217 #define PUNJ_SCRIPT_FLAGS (IndicClassTable::SF_NO_POST_BASE_LIMIT)
 218 #define GUJR_SCRIPT_FLAGS (IndicClassTable::SF_NO_POST_BASE_LIMIT)
 219 #define ORYA_SCRIPT_FLAGS (IndicClassTable::SF_REPH_AFTER_BELOW | IndicClassTable::SF_NO_POST_BASE_LIMIT)
 220 #define TAML_SCRIPT_FLAGS (IndicClassTable::SF_MPRE_FIXUP | IndicClassTable::SF_NO_POST_BASE_LIMIT)
 221 #define TELU_SCRIPT_FLAGS (IndicClassTable::SF_MATRAS_AFTER_BASE | 3)
 222 #define KNDA_SCRIPT_FLAGS (IndicClassTable::SF_MATRAS_AFTER_BASE | 3)
 223 #define MLYM_SCRIPT_FLAGS (IndicClassTable::SF_MPRE_FIXUP | IndicClassTable::SF_NO_POST_BASE_LIMIT)
 224
 225 //
 226 // Indic Class Tables
 227 //
 228 static const IndicClassTable devaClassTable = {0x0900, 0x0970, 2, DEVA_SCRIPT_FLAGS, devaCharClasses, NULL};
 229
 230 static const IndicClassTable bengClassTable = {0x0980, 0x09FA, 3, BENG_SCRIPT_FLAGS, bengCharClasses, bengSplitTable};
 231
 232 static const IndicClassTable punjClassTable = {0x0A00, 0x0A74, 2, PUNJ_SCRIPT_FLAGS, punjCharClasses, NULL};
 233
 234 static const IndicClassTable gujrClassTable = {0x0A80, 0x0AEF, 2, GUJR_SCRIPT_FLAGS, gujrCharClasses, NULL};
 235
 236 static const IndicClassTable oryaClassTable = {0x0B00, 0x0B70, 3, ORYA_SCRIPT_FLAGS, oryaCharClasses, oryaSplitTable};
 237
 238 static const IndicClassTable tamlClassTable = {0x0B80, 0x0BF2, 3, TAML_SCRIPT_FLAGS, tamlCharClasses, tamlSplitTable};
 239
 240 static const IndicClassTable teluClassTable = {0x0C00, 0x0C6F, 3, TELU_SCRIPT_FLAGS, teluCharClasses, teluSplitTable};
 241
 242 static const IndicClassTable kndaClassTable = {0x0C80, 0x0CEF, 4, KNDA_SCRIPT_FLAGS, kndaCharClasses, kndaSplitTable};
 243
 244 static const IndicClassTable mlymClassTable = {0x0D00, 0x0D6F, 3, MLYM_SCRIPT_FLAGS, mlymCharClasses, mlymSplitTable};
 245
 246 //
 247 // IndicClassTable addresses
 248 //
 249 static const IndicClassTable * const indicClassTables[] = {
 250     NULL,            /* 'zyyy' (COMMON) */
 251     NULL,            /* 'qaai' (INHERITED) */
 252     NULL,            /* 'arab' (ARABIC) */
 253     NULL,            /* 'armn' (ARMENIAN) */
 254     &bengClassTable, /* 'beng' (BENGALI) */
 255     NULL,            /* 'bopo' (BOPOMOFO) */
 256     NULL,            /* 'cher' (CHEROKEE) */
 257     NULL,            /* 'qaac' (COPTIC) */
 258     NULL,            /* 'cyrl' (CYRILLIC) */
 259     NULL,            /* 'dsrt' (DESERET) */
 260     &devaClassTable, /* 'deva' (DEVANAGARI) */
 261     NULL,            /* 'ethi' (ETHIOPIC) */
 262     NULL,            /* 'geor' (GEORGIAN) */
 263     NULL,            /* 'goth' (GOTHIC) */
 264     NULL,            /* 'grek' (GREEK) */
 265     &gujrClassTable, /* 'gujr' (GUJARATI) */
 266     &punjClassTable, /* 'guru' (GURMUKHI) */
 267     NULL,            /* 'hani' (HAN) */
 268     NULL,            /* 'hang' (HANGUL) */
 269     NULL,            /* 'hebr' (HEBREW) */
 270     NULL,            /* 'hira' (HIRAGANA) */
 271     &kndaClassTable, /* 'knda' (KANNADA) */
 272     NULL,            /* 'kata' (KATAKANA) */
 273     NULL,            /* 'khmr' (KHMER) */
 274     NULL,            /* 'laoo' (LAO) */
 275     NULL,            /* 'latn' (LATIN) */
 276     &mlymClassTable, /* 'mlym' (MALAYALAM) */
 277     NULL,            /* 'mong' (MONGOLIAN) */
 278     NULL,            /* 'mymr' (MYANMAR) */
 279     NULL,            /* 'ogam' (OGHAM) */
 280     NULL,            /* 'ital' (OLD-ITALIC) */
 281     &oryaClassTable, /* 'orya' (ORIYA) */
 282     NULL,            /* 'runr' (RUNIC) */
 283     NULL,            /* 'sinh' (SINHALA) */
 284     NULL,            /* 'syrc' (SYRIAC) */
 285     &tamlClassTable, /* 'taml' (TAMIL) */
 286     &teluClassTable, /* 'telu' (TELUGU) */
 287     NULL,            /* 'thaa' (THAANA) */
 288     NULL,            /* 'thai' (THAI) */
 289     NULL,            /* 'tibt' (TIBETAN) */
 290     NULL,            /* 'cans' (CANADIAN-ABORIGINAL) */
 291     NULL,            /* 'yiii' (YI) */
 292     NULL,            /* 'tglg' (TAGALOG) */
 293     NULL,            /* 'hano' (HANUNOO) */
 294     NULL,            /* 'buhd' (BUHID) */
 295     NULL,            /* 'tagb' (TAGBANWA) */
 296     NULL,            /* 'brai' (BRAILLE) */
 297     NULL,            /* 'cprt' (CYPRIOT) */
 298     NULL,            /* 'limb' (LIMBU) */
 299     NULL,            /* 'linb' (LINEAR_B) */
 300     NULL,            /* 'osma' (OSMANYA) */
 301     NULL,            /* 'shaw' (SHAVIAN) */
 302     NULL,            /* 'tale' (TAI_LE) */
 303     NULL,            /* 'ugar' (UGARITIC) */
 304     NULL             /* 'hrkt' (KATAKANA_OR_HIRAGANA) */
 305 };
 306
 307 IndicClassTable::CharClass IndicClassTable::getCharClass(LEUnicode ch) const
 308 {
 309     if (ch == C_SIGN_ZWJ) {
 310         return CF_CONSONANT | CC_ZERO_WIDTH_MARK;
 311     }
 312
 313     if (ch == C_SIGN_ZWNJ) {
 314         return CC_ZERO_WIDTH_MARK;
 315     }
 316
 317     if (ch < firstChar || ch > lastChar) {
 318         return CC_RESERVED;
 319     }
 320
 321     return classTable[ch - firstChar];
 322 }
 323
 324 const IndicClassTable *IndicClassTable::getScriptClassTable(le_int32 scriptCode)
 325 {
 326     if (scriptCode < 0 || scriptCode >= scriptCodeCount) {
 327         return NULL;
 328     }
 329
 330     return indicClassTables[scriptCode];
 331 }
 332
 333 le_int32 IndicReordering::getWorstCaseExpansion(le_int32 scriptCode)
 334 {
 335     const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode);
 336
 337     if (classTable == NULL) {
 338         return 1;
 339     }
 340
 341     return classTable->getWorstCaseExpansion();
 342 }
 343
 344 U_NAMESPACE_END