| /* |
| * @(#)IndicClassTables.cpp 1.4 00/03/15 |
| * |
| * (C) Copyright IBM Corp. 1998, 1999, 2000 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "OpenTypeTables.h" |
| #include "OpenTypeUtilities.h" |
| #include "IndicReordering.h" |
| #include "ScriptAndLanguageTags.h" |
| |
| #define ARRAY_SIZE(array) (sizeof array / sizeof array[0]) |
| |
| enum |
| { |
| // Split matra table indices |
| _x1 = 1 << IndicClassTable::CF_INDEX_SHIFT, |
| _x2 = 2 << IndicClassTable::CF_INDEX_SHIFT, |
| _x3 = 3 << IndicClassTable::CF_INDEX_SHIFT, |
| _x4 = 4 << IndicClassTable::CF_INDEX_SHIFT, |
| _x5 = 5 << IndicClassTable::CF_INDEX_SHIFT, |
| _x6 = 6 << IndicClassTable::CF_INDEX_SHIFT, |
| _x7 = 7 << IndicClassTable::CF_INDEX_SHIFT, |
| _x8 = 8 << IndicClassTable::CF_INDEX_SHIFT, |
| _x9 = 9 << IndicClassTable::CF_INDEX_SHIFT, |
| |
| // simple classes |
| _xx = IndicClassTable::CC_RESERVED, |
| _ma = IndicClassTable::CC_MODIFYING_MARK_ABOVE, |
| _mp = IndicClassTable::CC_MODIFYING_MARK_POST, |
| _iv = IndicClassTable::CC_INDEPENDENT_VOWEL, |
| _ct = IndicClassTable::CC_CONSONANT | IndicClassTable::CF_CONSONANT, |
| _cn = IndicClassTable::CC_CONSONANT_WITH_NUKTA | IndicClassTable::CF_CONSONANT, |
| _nu = IndicClassTable::CC_NUKTA, |
| _dv = IndicClassTable::CC_DEPENDENT_VOWEL, |
| _dl = _dv | IndicClassTable::CF_MATRA_PRE, |
| _db = _dv | IndicClassTable::CF_MATRA_BELOW, |
| _da = _dv | IndicClassTable::CF_MATRA_ABOVE, |
| _dr = _dv | IndicClassTable::CF_MATRA_POST, |
| _lm = _dv | IndicClassTable::CF_LENGTH_MARK, |
| _vr = IndicClassTable::CC_VIRAMA, |
| |
| // split matras |
| _s1 = _dv | _x1, |
| _s2 = _dv | _x2, |
| _s3 = _dv | _x3, |
| _s4 = _dv | _x4, |
| _s5 = _dv | _x5, |
| _s6 = _dv | _x6, |
| _s7 = _dv | _x7, |
| _s8 = _dv | _x8, |
| _s9 = _dv | _x9, |
| |
| // consonants with special forms |
| // NOTE: this assumes that no consonants with nukta have |
| // special forms... (Bengali RA?) |
| _bb = _ct | IndicClassTable::CF_BELOW_BASE, |
| _pb = _ct | IndicClassTable::CF_POST_BASE, |
| _vt = _bb | IndicClassTable::CF_VATTU, |
| _rv = _vt | IndicClassTable::CF_REPH, |
| _rp = _pb | IndicClassTable::CF_REPH |
| }; |
| |
| // |
| // Character class tables |
| // |
| const IndicClassTable::CharClass devaCharClasses[] = |
| { |
| _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, // 0900 - 090F |
| _iv, _iv, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0910 - 091F |
| _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _ct, // 0920 - 092F |
| _rv, _cn, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0930 - 093F |
| _dr, _db, _db, _db, _db, _da, _da, _da, _da, _dr, _dr, _dr, _dr, _vr, _xx, _xx, // 0940 - 094F |
| _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _cn, _cn, _cn, _cn, _cn, _cn, _cn, _cn, // 0950 - 095F |
| _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0960 - 096F |
| _xx // 0970 |
| }; |
| |
| const IndicClassTable::CharClass bengCharClasses[] = |
| { |
| _xx, _ma, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, // 0980 - 098F |
| _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0990 - 099F |
| _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _bb, _ct, _ct, _pb, // 09A0 - 09AF |
| _rv, _xx, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 09B0 - 09BF |
| _dr, _db, _db, _db, _db, _xx, _xx, _dl, _dl, _xx, _xx, _s1, _s2, _vr, _xx, _xx, // 09C0 - 09CF |
| _xx, _xx, _xx, _xx, _xx, _xx, _xx, _dr, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 09D0 - 09DF |
| _iv, _iv, _dv, _dv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 09E0 - 09EF |
| _ct, _ct, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx // 09F0 - 09FA |
| }; |
| |
| const IndicClassTable::CharClass punjCharClasses[] = |
| { |
| _xx, _xx, _ma, _xx, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _xx, _iv, // 0A00 - 0A0F |
| _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A10 - 0A1F |
| _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _bb, // 0A20 - 0A2F |
| _vt, _xx, _ct, _ct, _xx, _bb, _ct, _xx, _ct, _bb, _xx, _xx, _nu, _xx, _dr, _dl, // 0A30 - 0A3F |
| _dr, _db, _db, _xx, _xx, _xx, _xx, _da, _da, _xx, _xx, _da, _da, _vr, _xx, _xx, // 0A40 - 0A4F |
| _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _cn, _cn, _cn, _cn, _xx, _cn, _xx, // 0A50 - 0A5F |
| _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0A60 - 0A6F |
| _ma, _ma, _ct, _ct, _xx // 0A70 - 0A74 |
| }; |
| |
| const IndicClassTable::CharClass gujrCharClasses[] = |
| { |
| _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _xx, _iv, // 0A80 - 0A8F |
| _iv, _iv, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A90 - 0A9F |
| _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0AA0 - 0AAF |
| _rv, _xx, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0AB0 - 0ABF |
| _dr, _db, _db, _db, _db, _da, _xx, _da, _da, _dr, _xx, _dr, _dr, _vr, _xx, _xx, // 0AC0 - 0ACF |
| _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0AD0 - 0ADF |
| _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx // 0AE0 - 0AEF |
| }; |
| |
| const IndicClassTable::CharClass oryaCharClasses[] = |
| { |
| _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, // 0B00 - 0B0F |
| _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0B10 - 0B1F |
| _ct, _ct, _ct, _ct, _bb, _ct, _ct, _ct, _bb, _xx, _ct, _ct, _bb, _bb, _bb, _pb, // 0B20 - 0B2F |
| _rv, _xx, _bb, _bb, _xx, _xx, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _da, // 0B30 - 0B3F |
| _dr, _db, _db, _db, _xx, _xx, _xx, _dl, _s1, _xx, _xx, _s2, _s3, _vr, _xx, _xx, // 0B40 - 0B4F |
| _xx, _xx, _xx, _xx, _xx, _xx, _da, _dr, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 0B50 - 0B5F |
| _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0B60 - 0B6F |
| _xx // 0B70 |
| }; |
| |
| const IndicClassTable::CharClass tamlCharClasses[] = |
| { |
| _xx, _xx, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _iv, _iv, // 0B80 - 0B8F |
| _iv, _xx, _iv, _iv, _iv, _ct, _xx, _xx, _xx, _ct, _ct, _xx, _ct, _xx, _ct, _ct, // 0B90 - 0B9F |
| _xx, _xx, _xx, _ct, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _ct, _ct, // 0BA0 - 0BAF |
| _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _dr, _dr, // 0BB0 - 0BBF |
| _da, _dr, _dr, _xx, _xx, _xx, _dl, _dl, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0BC0 - 0BCF |
| _xx, _xx, _xx, _xx, _xx, _xx, _xx, _dr, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BD0 - 0BDF |
| _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BE0 - 0BEF |
| _xx, _xx, _xx // 0BF0 - 0BF2 |
| }; |
| |
| // FIXME: Should some of the bb's be pb's? (KA, NA, MA, YA, VA, etc. (approx 13)) |
| const IndicClassTable::CharClass teluCharClasses[] = |
| { |
| _xx, _mp, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C00 - 0C0F |
| _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C10 - 0C1F |
| _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0C20 - 0C2F |
| _vt, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _da, _da, // 0C30 - 0C3F |
| _da, _dr, _dr, _dr, _dr, _xx, _da, _da, _s1, _xx, _da, _da, _da, _vr, _xx, _xx, // 0C40 - 0C4F |
| _xx, _xx, _xx, _xx, _xx, _da, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0C50 - 0C5F |
| _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx // 0C60 - 0C6F |
| }; |
| |
| // FIXME: is 0CD5 a dr or an lm?? |
| const IndicClassTable::CharClass kndaCharClasses[] = |
| { |
| _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, // 0C80 - 0C8F |
| _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C90 - 0C9F |
| _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0CA0 - 0CAF |
| _rp, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _dr, _da, // 0CB0 - 0CBF |
| _s1, _dr, _dr, _dr, _dr, _xx, _da, _s2, _s3, _xx, _s4, _s5, _da, _vr, _xx, _xx, // 0CC0 - 0CCF |
| _xx, _xx, _xx, _xx, _xx, _lm, _dr, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _ct, _xx, // 0CD0 - 0CDF |
| _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx // 0CE0 - 0CEF |
| }; |
| |
| // FIXME: this is correct for old-style Malayalam (MAL) but not for reformed Malayalam (MLR) |
| // FIXME: should there be a REPH for old-style Malayalam? |
| const IndicClassTable::CharClass mlymCharClasses[] = |
| { |
| _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0D00 - 0D0F |
| _iv, _xx, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _bb, // 0D10 - 0D1F |
| _ct, _ct, _ct, _bb, _ct, _bb, _bb, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0D20 - 0D2F |
| _pb, _cn, _bb, _ct, _ct, _pb, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _dr, _dr, // 0D30 - 0D3F |
| _dr, _db, _db, _db, _xx, _xx, _dl, _dl, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0D40 - 0D4F |
| _xx, _xx, _xx, _xx, _xx, _xx, _xx, _dr, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0D50 - 0D5F |
| _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx // 0D60 - 0D6F |
| }; |
| |
| // |
| // Split matra tables |
| // |
| const SplitMatra bengSplitTable[] = {{0x09C7, 0x09BE}, {0x09C7, 0x09D7}}; |
| |
| const SplitMatra oryaSplitTable[] = {{0x0B47, 0x0B56}, {0x0B47, 0x0B3E}, {0x0B47, 0x0B57}}; |
| |
| const SplitMatra tamlSplitTable[] = {{0x0BC6, 0x0BBE}, {0x0BC7, 0x0BBE}, {0x0BC6, 0x0BD7}}; |
| |
| const SplitMatra teluSplitTable[] = {{0x0C46, 0x0C56}}; |
| |
| const SplitMatra kndaSplitTable[] = {{0x0CBF, 0x0CD5}, {0x0CC6, 0x0CD5}, {0x0CC6, 0x0CD6}, {0x0CC6, 0x0CC2}, |
| {0x0CC6, 0x0CC2, 0x0CD5}}; |
| |
| const SplitMatra mlymSplitTable[] = {{0x0D46, 0x0D3E}, {0x0D47, 0x0D3E}, {0x0D46, 0x0D57}}; |
| |
| // |
| // Script Flags |
| // |
| |
| // FIXME: post 'GSUB' reordering of MATRA_PRE's for Malayalam and Tamil |
| // FIXME: reformed Malayalam needs to reorder VATTU to before base glyph... |
| // FIXME: eyelash RA only for Devanagari?? |
| #define DEVA_SCRIPT_FLAGS (IndicClassTable::SF_EYELASH_RA | IndicClassTable::SF_NO_POST_BASE_LIMIT) |
| #define BENG_SCRIPT_FLAGS (IndicClassTable::SF_REPH_AFTER_BELOW | IndicClassTable::SF_NO_POST_BASE_LIMIT) |
| #define PUNJ_SCRIPT_FLAGS (IndicClassTable::SF_NO_POST_BASE_LIMIT) |
| #define GUJR_SCRIPT_FLAGS (IndicClassTable::SF_NO_POST_BASE_LIMIT) |
| #define ORYA_SCRIPT_FLAGS (IndicClassTable::SF_REPH_AFTER_BELOW | IndicClassTable::SF_NO_POST_BASE_LIMIT) |
| #define TAML_SCRIPT_FLAGS (IndicClassTable::SF_MPRE_FIXUP | IndicClassTable::SF_NO_POST_BASE_LIMIT) |
| #define TELU_SCRIPT_FLAGS (IndicClassTable::SF_MATRAS_AFTER_BASE | 3) |
| #define KNDA_SCRIPT_FLAGS (IndicClassTable::SF_MATRAS_AFTER_BASE | 3) |
| #define MLYM_SCRIPT_FLAGS (IndicClassTable::SF_NO_POST_BASE_LIMIT) |
| |
| // |
| // Indic Class Tables |
| // |
| const IndicClassTable devaClassTable = {0x0900, 0x0970, 2, DEVA_SCRIPT_FLAGS, devaCharClasses, NULL}; |
| |
| const IndicClassTable bengClassTable = {0x0980, 0x09FA, 3, BENG_SCRIPT_FLAGS, bengCharClasses, bengSplitTable}; |
| |
| const IndicClassTable punjClassTable = {0x0A00, 0x0A74, 2, PUNJ_SCRIPT_FLAGS, punjCharClasses, NULL}; |
| |
| const IndicClassTable gujrClassTable = {0x0A80, 0x0AEF, 2, GUJR_SCRIPT_FLAGS, gujrCharClasses, NULL}; |
| |
| const IndicClassTable oryaClassTable = {0x0B00, 0x0B70, 3, ORYA_SCRIPT_FLAGS, oryaCharClasses, oryaSplitTable}; |
| |
| const IndicClassTable tamlClassTable = {0x0B80, 0x0BF2, 3, TAML_SCRIPT_FLAGS, tamlCharClasses, tamlSplitTable}; |
| |
| const IndicClassTable teluClassTable = {0x0C00, 0x0C6F, 3, TELU_SCRIPT_FLAGS, teluCharClasses, teluSplitTable}; |
| |
| const IndicClassTable kndaClassTable = {0x0C80, 0x0CEF, 4, KNDA_SCRIPT_FLAGS, kndaCharClasses, kndaSplitTable}; |
| |
| const IndicClassTable mlymClassTable = {0x0D00, 0x0D6F, 3, MLYM_SCRIPT_FLAGS, mlymCharClasses, mlymSplitTable}; |
| |
| // |
| // IndicClassTable addresses |
| // |
| const IndicClassTable *indicClassTables[] = { |
| &devaClassTable, // 'deva' |
| &bengClassTable, // 'beng' |
| &punjClassTable, // 'punj' punjabi == gurmukhi |
| &gujrClassTable, // 'gujr' |
| &oryaClassTable, // 'orya' |
| &tamlClassTable, // 'taml' |
| &teluClassTable, // 'telu' |
| &kndaClassTable, // 'knda' |
| &mlymClassTable // 'mlyn' |
| }; |
| |
| IndicClassTable::CharClass IndicClassTable::getCharClass(LEUnicode ch) const |
| { |
| if (ch == C_SIGN_ZWJ) { |
| return CF_CONSONANT | CC_ZERO_WIDTH_MARK; |
| } |
| |
| if (ch == C_SIGN_ZWNJ) { |
| return CC_ZERO_WIDTH_MARK; |
| } |
| |
| if (ch < firstChar || ch > lastChar) { |
| return CC_RESERVED; |
| } |
| |
| return classTable[ch - firstChar]; |
| } |
| |
| const IndicClassTable *IndicClassTable::getScriptClassTable(le_int32 scriptCode) |
| { |
| if (scriptCode < devaScriptCode || scriptCode > mlymScriptCode) { |
| return NULL; |
| } |
| |
| return indicClassTables[scriptCode - devaScriptCode]; |
| } |
| |
| le_int32 IndicReordering::getWorstCaseExpansion(le_int32 scriptCode) |
| { |
| const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode); |
| |
| if (classTable == NULL) { |
| return 1; |
| } |
| |
| return classTable->getWorstCaseExpansion(); |
| } |
| |
| |