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      1 /*
      2  *
      3  * (C) Copyright IBM Corp. 1998-2009 - 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 // Split matra table indices
     16 #define _x1  (1 << CF_INDEX_SHIFT)
     17 #define _x2  (2 << CF_INDEX_SHIFT)
     18 #define _x3  (3 << CF_INDEX_SHIFT)
     19 #define _x4  (4 << CF_INDEX_SHIFT)
     20 #define _x5  (5 << CF_INDEX_SHIFT)
     21 #define _x6  (6 << CF_INDEX_SHIFT)
     22 #define _x7  (7 << CF_INDEX_SHIFT)
     23 #define _x8  (8 << CF_INDEX_SHIFT)
     24 #define _x9  (9 << CF_INDEX_SHIFT)
     25 
     26 // simple classes
     27 #define _xx  (CC_RESERVED)
     28 #define _ma  (CC_VOWEL_MODIFIER | CF_POS_ABOVE)
     29 #define _mp  (CC_VOWEL_MODIFIER | CF_POS_AFTER)
     30 #define _sa  (CC_STRESS_MARK | CF_POS_ABOVE)
     31 #define _sb  (CC_STRESS_MARK | CF_POS_BELOW)
     32 #define _iv  (CC_INDEPENDENT_VOWEL)
     33 #define _i2  (CC_INDEPENDENT_VOWEL_2)
     34 #define _i3  (CC_INDEPENDENT_VOWEL_3)
     35 #define _ct  (CC_CONSONANT | CF_CONSONANT)
     36 #define _cn  (CC_CONSONANT_WITH_NUKTA | CF_CONSONANT)
     37 #define _nu  (CC_NUKTA)
     38 #define _dv  (CC_DEPENDENT_VOWEL)
     39 #define _dl  (_dv | CF_POS_BEFORE)
     40 #define _db  (_dv | CF_POS_BELOW)
     41 #define _da  (_dv | CF_POS_ABOVE)
     42 #define _dr  (_dv | CF_POS_AFTER)
     43 #define _lm  (_dv | CF_LENGTH_MARK)
     44 #define _l1  (CC_SPLIT_VOWEL_PIECE_1 | CF_POS_BEFORE)
     45 #define _a1  (CC_SPLIT_VOWEL_PIECE_1 | CF_POS_ABOVE)
     46 #define _b2  (CC_SPLIT_VOWEL_PIECE_2 | CF_POS_BELOW)
     47 #define _r2  (CC_SPLIT_VOWEL_PIECE_2 | CF_POS_AFTER)
     48 #define _m2  (CC_SPLIT_VOWEL_PIECE_2 | CF_LENGTH_MARK)
     49 #define _m3  (CC_SPLIT_VOWEL_PIECE_3 | CF_LENGTH_MARK)
     50 #define _vr  (CC_VIRAMA)
     51 #define _al  (CC_AL_LAKUNA)
     52 
     53 // split matras
     54 #define _s1  (_dv | _x1)
     55 #define _s2  (_dv | _x2)
     56 #define _s3  (_dv | _x3)
     57 #define _s4  (_dv | _x4)
     58 #define _s5  (_dv | _x5)
     59 #define _s6  (_dv | _x6)
     60 #define _s7  (_dv | _x7)
     61 #define _s8  (_dv | _x8)
     62 #define _s9  (_dv | _x9)
     63 
     64 // consonants with special forms
     65 // NOTE: this assumes that no consonants with nukta have
     66 // special forms... (Bengali RA?)
     67 #define _bb  (_ct | CF_BELOW_BASE)
     68 #define _pb  (_ct | CF_POST_BASE)
     69 #define _vt  (_bb | CF_VATTU)
     70 #define _rv  (_vt | CF_REPH)
     71 #define _rp  (_pb | CF_REPH)
     72 #define _rb  (_bb | CF_REPH)
     73 
     74 //
     75 // Character class tables
     76 //
     77 static const IndicClassTable::CharClass devaCharClasses[] =
     78 {
     79     _xx, _ma, _ma, _mp, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, // 0900 - 090F
     80     _iv, _iv, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0910 - 091F
     81     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _ct, // 0920 - 092F
     82     _rv, _cn, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0930 - 093F
     83     _dr, _db, _db, _db, _db, _da, _da, _da, _da, _dr, _dr, _dr, _dr, _vr, _xx, _xx, // 0940 - 094F
     84     _xx, _sa, _sb, _sa, _sa, _xx, _xx, _xx, _cn, _cn, _cn, _cn, _cn, _cn, _cn, _cn, // 0950 - 095F
     85     _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0960 - 096F
     86     _xx                                                                             // 0970
     87 };
     88 
     89 static const IndicClassTable::CharClass bengCharClasses[] =
     90 {
     91     _xx, _ma, _mp, _mp, _xx, _i2, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _i2, // 0980 - 098F
     92     _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0990 - 099F
     93     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _bb, _ct, _ct, _pb, // 09A0 - 09AF
     94     _rv, _xx, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _r2, _dl, // 09B0 - 09BF
     95     _dr, _db, _db, _db, _db, _xx, _xx, _l1, _dl, _xx, _xx, _s1, _s2, _vr, _xx, _xx, // 09C0 - 09CF
     96     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 09D0 - 09DF
     97     _iv, _iv, _dv, _dv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 09E0 - 09EF
     98     _rv, _ct, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx                           // 09F0 - 09FA
     99 };
    100 
    101 static const IndicClassTable::CharClass punjCharClasses[] =
    102 {
    103     _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _xx, _iv, // 0A00 - 0A0F
    104     _iv, _xx, _xx, _i3, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A10 - 0A1F
    105     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _bb, // 0A20 - 0A2F
    106     _vt, _xx, _ct, _cn, _xx, _bb, _cn, _xx, _ct, _bb, _xx, _xx, _nu, _xx, _dr, _dl, // 0A30 - 0A3F
    107     _dr, _b2, _db, _xx, _xx, _xx, _xx, _da, _da, _xx, _xx, _a1, _da, _vr, _xx, _xx, // 0A40 - 0A4F
    108     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _cn, _cn, _cn, _ct, _xx, _cn, _xx, // 0A50 - 0A5F
    109     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0A60 - 0A6F
    110     _ma, _ma, _xx, _xx, _xx                                                         // 0A70 - 0A74
    111 };
    112 
    113 static const IndicClassTable::CharClass gujrCharClasses[] =
    114 {
    115     _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _xx, _iv, // 0A80 - 0A8F
    116     _iv, _iv, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A90 - 0A9F
    117     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0AA0 - 0AAF
    118     _rv, _xx, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0AB0 - 0ABF
    119     _dr, _db, _db, _db, _db, _da, _xx, _da, _da, _dr, _xx, _dr, _dr, _vr, _xx, _xx, // 0AC0 - 0ACF
    120     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0AD0 - 0ADF
    121     _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0AE0 - 0AEF
    122 };
    123 
    124 #if 1
    125 static const IndicClassTable::CharClass oryaCharClasses[] =
    126 {
    127     _xx, _ma, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, /* 0B00 - 0B0F */
    128     _iv, _xx, _xx, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _ct, _bb, /* 0B10 - 0B1F */
    129     _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _pb, /* 0B20 - 0B2F */
    130     _rb, _xx, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _nu, _xx, _dr, _da, /* 0B30 - 0B3F */
    131     _dr, _db, _db, _db, _xx, _xx, _xx, _dl, _s1, _xx, _xx, _s2, _s3, _vr, _xx, _xx, /* 0B40 - 0B4F */
    132     _xx, _xx, _xx, _xx, _xx, _xx, _da, _dr, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _pb, /* 0B50 - 0B5F */
    133     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0B60 - 0B6F */
    134     _xx, _bb                                                                        /* 0B70 - 0B71 */
    135 };
    136 #else
    137 static const IndicClassTable::CharClass oryaCharClasses[] =
    138 {
    139     _xx, _ma, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, // 0B00 - 0B0F
    140     _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0B10 - 0B1F
    141     _ct, _ct, _ct, _ct, _bb, _ct, _ct, _ct, _bb, _xx, _ct, _ct, _bb, _bb, _bb, _pb, // 0B20 - 0B2F
    142     _rb, _xx, _bb, _bb, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _r2, _da, // 0B30 - 0B3F
    143     _dr, _db, _db, _db, _xx, _xx, _xx, _l1, _s1, _xx, _xx, _s2, _s3, _vr, _xx, _xx, // 0B40 - 0B4F
    144     _xx, _xx, _xx, _xx, _xx, _xx, _m2, _m2, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 0B50 - 0B5F
    145     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0B60 - 0B6F
    146     _xx, _ct                                                                        // 0B70 - 0B71
    147 };
    148 #endif
    149 
    150 static const IndicClassTable::CharClass tamlCharClasses[] =
    151 {
    152     _xx, _xx, _ma, _xx, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _iv, _iv, // 0B80 - 0B8F
    153     _iv, _xx, _iv, _iv, _iv, _ct, _xx, _xx, _xx, _ct, _ct, _xx, _ct, _xx, _ct, _ct, // 0B90 - 0B9F
    154     _xx, _xx, _xx, _ct, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _ct, _ct, // 0BA0 - 0BAF
    155     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0BB0 - 0BBF
    156     _da, _dr, _dr, _xx, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0BC0 - 0BCF
    157     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BD0 - 0BDF
    158     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BE0 - 0BEF
    159     _xx, _xx, _xx                                                                   // 0BF0 - 0BF2
    160 };
    161 
    162 // FIXME: Should some of the bb's be pb's? (KA, NA, MA, YA, VA, etc. (approx 13))
    163 static const IndicClassTable::CharClass teluCharClasses[] =
    164 {
    165     _xx, _mp, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C00 - 0C0F
    166     _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C10 - 0C1F
    167     _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0C20 - 0C2F
    168     _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _da, _da, // 0C30 - 0C3F
    169     _da, _dr, _dr, _dr, _dr, _xx, _a1, _da, _s1, _xx, _da, _da, _da, _vr, _xx, _xx, // 0C40 - 0C4F
    170     _xx, _xx, _xx, _xx, _xx, _da, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0C50 - 0C5F
    171     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0C60 - 0C6F
    172 };
    173 
    174 // U+CC3 and U+CC4 are _lm here not _dr since the Kannada rendering
    175 // rules want them below and to the right of the entire cluster
    176 //
    177 // There's some information about this in:
    178 //
    179 //  http://brahmi.sourceforge.net/docs/KannadaComputing.html
    180 static const IndicClassTable::CharClass kndaCharClasses[] =
    181 {
    182     _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, // 0C80 - 0C8F
    183     _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C90 - 0C9F
    184     _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0CA0 - 0CAF
    185     _rb, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _dr, _da, // 0CB0 - 0CBF
    186     _s1, _dr, _r2, _lm, _lm, _xx, _a1, _s2, _s3, _xx, _s4, _s5, _da, _vr, _xx, _xx, // 0CC0 - 0CCF
    187     _xx, _xx, _xx, _xx, _xx, _m3, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _ct, _xx, // 0CD0 - 0CDF
    188     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0CE0 - 0CEF
    189 };
    190 
    191 // FIXME: this is correct for old-style Malayalam (MAL) but not for reformed Malayalam (MLR)
    192 // FIXME: should there be a REPH for old-style Malayalam?
    193 static const IndicClassTable::CharClass mlymCharClasses[] =
    194 {
    195     _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0D00 - 0D0F
    196     _iv, _xx, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0D10 - 0D1F
    197     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _pb, // 0D20 - 0D2F
    198     _pb, _cn, _bb, _ct, _ct, _pb, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0D30 - 0D3F
    199     _dr, _dr, _dr, _dr, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0D40 - 0D4F
    200     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0D50 - 0D5F
    201     _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0D60 - 0D6F
    202 };
    203 
    204 static const IndicClassTable::CharClass sinhCharClasses[] =
    205 {
    206     _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, // 0D80 - 0D8F
    207     _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0D90 - 0D9F
    208     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0DA0 - 0DAF
    209     _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _xx, _xx, // 0DB0 - 0DBF
    210     _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _al, _xx, _xx, _xx, _xx, _dr, // 0DC0 - 0DCF
    211     _dr, _dr, _da, _da, _db, _xx, _db, _xx, _dr, _dl, _s1, _dl, _s2, _s3, _s4, _dr, // 0DD0 - 0DDF
    212     _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0DE0 - 0DEF
    213     _xx, _xx, _dr, _dr, _xx                                                         // 0DF0 - 0DF4
    214 };
    215 
    216 //
    217 // Split matra tables
    218 //
    219 static const SplitMatra bengSplitTable[] = {{0x09C7, 0x09BE}, {0x09C7, 0x09D7}};
    220 
    221 static const SplitMatra oryaSplitTable[] = {{0x0B47, 0x0B56}, {0x0B47, 0x0B3E}, {0x0B47, 0x0B57}};
    222 
    223 static const SplitMatra tamlSplitTable[] = {{0x0BC6, 0x0BBE}, {0x0BC7, 0x0BBE}, {0x0BC6, 0x0BD7}};
    224 
    225 static const SplitMatra teluSplitTable[] = {{0x0C46, 0x0C56}};
    226 
    227 static const SplitMatra kndaSplitTable[] = {{0x0CBF, 0x0CD5}, {0x0CC6, 0x0CD5}, {0x0CC6, 0x0CD6}, {0x0CC6, 0x0CC2},
    228                                             {0x0CC6, 0x0CC2, 0x0CD5}};
    229 
    230 static const SplitMatra mlymSplitTable[] = {{0x0D46, 0x0D3E}, {0x0D47, 0x0D3E}, {0x0D46, 0x0D57}};
    231 
    232 
    233 static const SplitMatra sinhSplitTable[] = {{0x0DD9, 0x0DCA}, {0x0DD9, 0x0DCF}, {0x0DD9, 0x0DCF, 0x0DCA},
    234                                             {0x0DD9, 0x0DDF}};
    235 //
    236 // Script Flags
    237 //
    238 
    239 // FIXME: post 'GSUB' reordering of MATRA_PRE's for Malayalam and Tamil
    240 // FIXME: reformed Malayalam needs to reorder VATTU to before base glyph...
    241 // FIXME: not sure passing ZWJ/ZWNJ is best way to render Malayalam Cillu...
    242 // FIXME: eyelash RA only for Devanagari??
    243 #define DEVA_SCRIPT_FLAGS (SF_EYELASH_RA | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
    244 #define BENG_SCRIPT_FLAGS (SF_REPH_AFTER_BELOW | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
    245 #define PUNJ_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
    246 #define GUJR_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
    247 #define ORYA_SCRIPT_FLAGS (SF_REPH_AFTER_BELOW | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
    248 #define TAML_SCRIPT_FLAGS (SF_MPRE_FIXUP | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
    249 #define TELU_SCRIPT_FLAGS (SF_MATRAS_AFTER_BASE | SF_FILTER_ZERO_WIDTH | 3)
    250 #define KNDA_SCRIPT_FLAGS (SF_MATRAS_AFTER_BASE | SF_FILTER_ZERO_WIDTH | 3)
    251 #define MLYM_SCRIPT_FLAGS (SF_MPRE_FIXUP | SF_NO_POST_BASE_LIMIT /*| SF_FILTER_ZERO_WIDTH*/)
    252 #define SINH_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT)
    253 
    254 //
    255 // Indic Class Tables
    256 //
    257 static const IndicClassTable devaClassTable = {0x0900, 0x0970, 2, DEVA_SCRIPT_FLAGS, devaCharClasses, NULL};
    258 
    259 static const IndicClassTable bengClassTable = {0x0980, 0x09FA, 3, BENG_SCRIPT_FLAGS, bengCharClasses, bengSplitTable};
    260 
    261 static const IndicClassTable punjClassTable = {0x0A00, 0x0A74, 2, PUNJ_SCRIPT_FLAGS, punjCharClasses, NULL};
    262 
    263 static const IndicClassTable gujrClassTable = {0x0A80, 0x0AEF, 2, GUJR_SCRIPT_FLAGS, gujrCharClasses, NULL};
    264 
    265 static const IndicClassTable oryaClassTable = {0x0B00, 0x0B71, 3, ORYA_SCRIPT_FLAGS, oryaCharClasses, oryaSplitTable};
    266 
    267 static const IndicClassTable tamlClassTable = {0x0B80, 0x0BF2, 3, TAML_SCRIPT_FLAGS, tamlCharClasses, tamlSplitTable};
    268 
    269 static const IndicClassTable teluClassTable = {0x0C00, 0x0C6F, 3, TELU_SCRIPT_FLAGS, teluCharClasses, teluSplitTable};
    270 
    271 static const IndicClassTable kndaClassTable = {0x0C80, 0x0CEF, 4, KNDA_SCRIPT_FLAGS, kndaCharClasses, kndaSplitTable};
    272 
    273 static const IndicClassTable mlymClassTable = {0x0D00, 0x0D6F, 3, MLYM_SCRIPT_FLAGS, mlymCharClasses, mlymSplitTable};
    274 
    275 static const IndicClassTable sinhClassTable = {0x0D80, 0x0DF4, 4, SINH_SCRIPT_FLAGS, sinhCharClasses, sinhSplitTable};
    276 
    277 //
    278 // IndicClassTable addresses
    279 //
    280 static const IndicClassTable * const indicClassTables[scriptCodeCount] = {
    281     NULL,            /* 'zyyy' (COMMON) */
    282     NULL,            /* 'qaai' (INHERITED) */
    283     NULL,            /* 'arab' (ARABIC) */
    284     NULL,            /* 'armn' (ARMENIAN) */
    285     &bengClassTable, /* 'beng' (BENGALI) */
    286     NULL,            /* 'bopo' (BOPOMOFO) */
    287     NULL,            /* 'cher' (CHEROKEE) */
    288     NULL,            /* 'copt' (COPTIC) */
    289     NULL,            /* 'cyrl' (CYRILLIC) */
    290     NULL,            /* 'dsrt' (DESERET) */
    291     &devaClassTable, /* 'deva' (DEVANAGARI) */
    292     NULL,            /* 'ethi' (ETHIOPIC) */
    293     NULL,            /* 'geor' (GEORGIAN) */
    294     NULL,            /* 'goth' (GOTHIC) */
    295     NULL,            /* 'grek' (GREEK) */
    296     &gujrClassTable, /* 'gujr' (GUJARATI) */
    297     &punjClassTable, /* 'guru' (GURMUKHI) */
    298     NULL,            /* 'hani' (HAN) */
    299     NULL,            /* 'hang' (HANGUL) */
    300     NULL,            /* 'hebr' (HEBREW) */
    301     NULL,            /* 'hira' (HIRAGANA) */
    302     &kndaClassTable, /* 'knda' (KANNADA) */
    303     NULL,            /* 'kata' (KATAKANA) */
    304     NULL,            /* 'khmr' (KHMER) */
    305     NULL,            /* 'laoo' (LAO) */
    306     NULL,            /* 'latn' (LATIN) */
    307     &mlymClassTable, /* 'mlym' (MALAYALAM) */
    308     NULL,            /* 'mong' (MONGOLIAN) */
    309     NULL,            /* 'mymr' (MYANMAR) */
    310     NULL,            /* 'ogam' (OGHAM) */
    311     NULL,            /* 'ital' (OLD-ITALIC) */
    312     &oryaClassTable, /* 'orya' (ORIYA) */
    313     NULL,            /* 'runr' (RUNIC) */
    314     &sinhClassTable, /* 'sinh' (SINHALA) */
    315     NULL,            /* 'syrc' (SYRIAC) */
    316     &tamlClassTable, /* 'taml' (TAMIL) */
    317     &teluClassTable, /* 'telu' (TELUGU) */
    318     NULL,            /* 'thaa' (THAANA) */
    319     NULL,            /* 'thai' (THAI) */
    320     NULL,            /* 'tibt' (TIBETAN) */
    321     NULL,            /* 'cans' (CANADIAN-ABORIGINAL) */
    322     NULL,            /* 'yiii' (YI) */
    323     NULL,            /* 'tglg' (TAGALOG) */
    324     NULL,            /* 'hano' (HANUNOO) */
    325     NULL,            /* 'buhd' (BUHID) */
    326     NULL,            /* 'tagb' (TAGBANWA) */
    327     NULL,            /* 'brai' (BRAILLE) */
    328     NULL,            /* 'cprt' (CYPRIOT) */
    329     NULL,            /* 'limb' (LIMBU) */
    330     NULL,            /* 'linb' (LINEAR_B) */
    331     NULL,            /* 'osma' (OSMANYA) */
    332     NULL,            /* 'shaw' (SHAVIAN) */
    333     NULL,            /* 'tale' (TAI_LE) */
    334     NULL,            /* 'ugar' (UGARITIC) */
    335     NULL,            /* 'hrkt' (KATAKANA_OR_HIRAGANA) */
    336     NULL,            /* 'bugi' (BUGINESE) */
    337     NULL,            /* 'glag' (GLAGOLITIC) */
    338     NULL,            /* 'khar' (KHAROSHTHI) */
    339     NULL,            /* 'sylo' (SYLOTI_NAGRI) */
    340     NULL,            /* 'talu' (NEW_TAI_LUE) */
    341     NULL,            /* 'tfng' (TIFINAGH) */
    342     NULL,            /* 'xpeo' (OLD_PERSIAN) */
    343     NULL,            /* 'bali' (BALINESE) */
    344     NULL,            /* 'batk' (BATK) */
    345     NULL,            /* 'blis' (BLIS) */
    346     NULL,            /* 'brah' (BRAH) */
    347     NULL,            /* 'cham' (CHAM) */
    348     NULL,            /* 'cirt' (CIRT) */
    349     NULL,            /* 'cyrs' (CYRS) */
    350     NULL,            /* 'egyd' (EGYD) */
    351     NULL,            /* 'egyh' (EGYH) */
    352     NULL,            /* 'egyp' (EGYP) */
    353     NULL,            /* 'geok' (GEOK) */
    354     NULL,            /* 'hans' (HANS) */
    355     NULL,            /* 'hant' (HANT) */
    356     NULL,            /* 'hmng' (HMNG) */
    357     NULL,            /* 'hung' (HUNG) */
    358     NULL,            /* 'inds' (INDS) */
    359     NULL,            /* 'java' (JAVA) */
    360     NULL,            /* 'kali' (KALI) */
    361     NULL,            /* 'latf' (LATF) */
    362     NULL,            /* 'latg' (LATG) */
    363     NULL,            /* 'lepc' (LEPC) */
    364     NULL,            /* 'lina' (LINA) */
    365     NULL,            /* 'mand' (MAND) */
    366     NULL,            /* 'maya' (MAYA) */
    367     NULL,            /* 'mero' (MERO) */
    368     NULL,            /* 'nko ' (NKO) */
    369     NULL,            /* 'orkh' (ORKH) */
    370     NULL,            /* 'perm' (PERM) */
    371     NULL,            /* 'phag' (PHAGS_PA) */
    372     NULL,            /* 'phnx' (PHOENICIAN) */
    373     NULL,            /* 'plrd' (PLRD) */
    374     NULL,            /* 'roro' (RORO) */
    375     NULL,            /* 'sara' (SARA) */
    376     NULL,            /* 'syre' (SYRE) */
    377     NULL,            /* 'syrj' (SYRJ) */
    378     NULL,            /* 'syrn' (SYRN) */
    379     NULL,            /* 'teng' (TENG) */
    380     NULL,            /* 'vai ' (VAII) */
    381     NULL,            /* 'visp' (VISP) */
    382     NULL,            /* 'xsux' (CUNEIFORM) */
    383     NULL,            /* 'zxxx' (ZXXX) */
    384     NULL,            /* 'zzzz' (UNKNOWN) */
    385     NULL,            /* 'cari' (CARI) */
    386     NULL,            /* 'jpan' (JPAN) */
    387     NULL,            /* 'lana' (LANA) */
    388     NULL,            /* 'lyci' (LYCI) */
    389     NULL,            /* 'lydi' (LYDI) */
    390     NULL,            /* 'olck' (OLCK) */
    391     NULL,            /* 'rjng' (RJNG) */
    392     NULL,            /* 'saur' (SAUR) */
    393     NULL,            /* 'sgnw' (SGNW) */
    394     NULL,            /* 'sund' (SUND) */
    395     NULL,            /* 'moon' (MOON) */
    396     NULL,            /* 'mtei' (MTEI) */
    397     NULL,            /* 'armi' (ARMI) */
    398     NULL,            /* 'avst' (AVST) */
    399     NULL,            /* 'cakm' (CAKM) */
    400     NULL,            /* 'kore' (KORE) */
    401     NULL,            /* 'kthi' (KTHI) */
    402     NULL,            /* 'mani' (MANI) */
    403     NULL,            /* 'phli' (PHLI) */
    404     NULL,            /* 'phlp' (PHLP) */
    405     NULL,            /* 'phlv' (PHLV) */
    406     NULL,            /* 'prti' (PRTI) */
    407     NULL,            /* 'samr' (SAMR) */
    408     NULL,            /* 'tavt' (TAVT) */
    409     NULL,            /* 'zmth' (ZMTH) */
    410     NULL             /* 'zsym' (ZSYM) */
    411 };
    412 
    413 IndicClassTable::CharClass IndicClassTable::getCharClass(LEUnicode ch) const
    414 {
    415     if (ch == C_SIGN_ZWJ) {
    416         return CF_CONSONANT | CC_ZERO_WIDTH_MARK;
    417     }
    418 
    419     if (ch == C_SIGN_ZWNJ) {
    420         return CC_ZERO_WIDTH_MARK;
    421     }
    422 
    423     if (ch < firstChar || ch > lastChar) {
    424         return CC_RESERVED;
    425     }
    426 
    427     return classTable[ch - firstChar];
    428 }
    429 
    430 const IndicClassTable *IndicClassTable::getScriptClassTable(le_int32 scriptCode)
    431 {
    432     if (scriptCode < 0 || scriptCode >= scriptCodeCount) {
    433         return NULL;
    434     }
    435 
    436     return indicClassTables[scriptCode];
    437 }
    438 
    439 le_int32 IndicReordering::getWorstCaseExpansion(le_int32 scriptCode)
    440 {
    441     const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode);
    442 
    443     if (classTable == NULL) {
    444         return 1;
    445     }
    446 
    447     return classTable->getWorstCaseExpansion();
    448 }
    449 
    450 le_bool IndicReordering::getFilterZeroWidth(le_int32 scriptCode)
    451 {
    452     const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode);
    453 
    454     if (classTable == NULL) {
    455         return TRUE;
    456     }
    457 
    458     return classTable->getFilterZeroWidth();
    459 }
    460 
    461 U_NAMESPACE_END
    462