1/*
2 *
3 * (C) Copyright IBM Corp. 1998-2014 - 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
13U_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 _fb  (_ct | CF_PRE_BASE)
70#define _vt  (_bb | CF_VATTU)
71#define _rv  (_vt | CF_REPH)
72#define _rp  (_pb | CF_REPH)
73#define _rb  (_bb | CF_REPH)
74
75//
76// Character class tables
77//
78static const IndicClassTable::CharClass devaCharClasses[] =
79{
80    _xx, _ma, _ma, _mp, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, // 0900 - 090F
81    _iv, _iv, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0910 - 091F
82    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _ct, // 0920 - 092F
83    _rv, _cn, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0930 - 093F
84    _dr, _db, _db, _db, _db, _da, _da, _da, _da, _dr, _dr, _dr, _dr, _vr, _xx, _xx, // 0940 - 094F
85    _xx, _sa, _sb, _sa, _sa, _xx, _xx, _xx, _cn, _cn, _cn, _cn, _cn, _cn, _cn, _cn, // 0950 - 095F
86    _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0960 - 096F
87    _xx                                                                             // 0970
88};
89
90static const IndicClassTable::CharClass bengCharClasses[] =
91{
92    _xx, _ma, _mp, _mp, _xx, _i2, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _i2, // 0980 - 098F
93    _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0990 - 099F
94    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _bb, _ct, _ct, _pb, // 09A0 - 09AF
95    _rv, _xx, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _r2, _dl, // 09B0 - 09BF
96    _dr, _db, _db, _db, _db, _xx, _xx, _l1, _dl, _xx, _xx, _s1, _s2, _vr, _xx, _xx, // 09C0 - 09CF
97    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 09D0 - 09DF
98    _iv, _iv, _dv, _dv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 09E0 - 09EF
99    _rv, _ct, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx                           // 09F0 - 09FA
100};
101
102static const IndicClassTable::CharClass punjCharClasses[] =
103{
104    _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _xx, _iv, // 0A00 - 0A0F
105    _iv, _xx, _xx, _i3, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A10 - 0A1F
106    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _bb, // 0A20 - 0A2F
107    _vt, _xx, _ct, _cn, _xx, _bb, _cn, _xx, _ct, _bb, _xx, _xx, _nu, _xx, _dr, _dl, // 0A30 - 0A3F
108    _dr, _b2, _db, _xx, _xx, _xx, _xx, _da, _da, _xx, _xx, _a1, _da, _vr, _xx, _xx, // 0A40 - 0A4F
109    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _cn, _cn, _cn, _ct, _xx, _cn, _xx, // 0A50 - 0A5F
110    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0A60 - 0A6F
111    _ma, _ma, _xx, _xx, _xx                                                         // 0A70 - 0A74
112};
113
114static const IndicClassTable::CharClass gujrCharClasses[] =
115{
116    _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _xx, _iv, // 0A80 - 0A8F
117    _iv, _iv, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0A90 - 0A9F
118    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0AA0 - 0AAF
119    _rv, _xx, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, // 0AB0 - 0ABF
120    _dr, _db, _db, _db, _db, _da, _xx, _da, _da, _dr, _xx, _dr, _dr, _vr, _xx, _xx, // 0AC0 - 0ACF
121    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0AD0 - 0ADF
122    _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0AE0 - 0AEF
123};
124
125#if 1
126static const IndicClassTable::CharClass oryaCharClasses[] =
127{
128    _xx, _ma, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, /* 0B00 - 0B0F */
129    _iv, _xx, _xx, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _ct, _bb, /* 0B10 - 0B1F */
130    _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _pb, /* 0B20 - 0B2F */
131    _rb, _xx, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _nu, _xx, _dr, _da, /* 0B30 - 0B3F */
132    _dr, _db, _db, _db, _xx, _xx, _xx, _dl, _s1, _xx, _xx, _s2, _s3, _vr, _xx, _xx, /* 0B40 - 0B4F */
133    _xx, _xx, _xx, _xx, _xx, _xx, _da, _dr, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _pb, /* 0B50 - 0B5F */
134    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0B60 - 0B6F */
135    _xx, _bb                                                                        /* 0B70 - 0B71 */
136};
137#else
138static const IndicClassTable::CharClass oryaCharClasses[] =
139{
140    _xx, _ma, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, // 0B00 - 0B0F
141    _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0B10 - 0B1F
142    _ct, _ct, _ct, _ct, _bb, _ct, _ct, _ct, _bb, _xx, _ct, _ct, _bb, _bb, _bb, _pb, // 0B20 - 0B2F
143    _rb, _xx, _bb, _bb, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _r2, _da, // 0B30 - 0B3F
144    _dr, _db, _db, _db, _xx, _xx, _xx, _l1, _s1, _xx, _xx, _s2, _s3, _vr, _xx, _xx, // 0B40 - 0B4F
145    _xx, _xx, _xx, _xx, _xx, _xx, _m2, _m2, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, // 0B50 - 0B5F
146    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0B60 - 0B6F
147    _xx, _ct                                                                        // 0B70 - 0B71
148};
149#endif
150
151static const IndicClassTable::CharClass tamlCharClasses[] =
152{
153    _xx, _xx, _ma, _xx, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _iv, _iv, // 0B80 - 0B8F
154    _iv, _xx, _iv, _iv, _iv, _ct, _xx, _xx, _xx, _ct, _ct, _xx, _ct, _xx, _ct, _ct, // 0B90 - 0B9F
155    _xx, _xx, _xx, _ct, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _ct, _ct, // 0BA0 - 0BAF
156    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0BB0 - 0BBF
157    _da, _dr, _dr, _xx, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0BC0 - 0BCF
158    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BD0 - 0BDF
159    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0BE0 - 0BEF
160    _xx, _xx, _xx                                                                   // 0BF0 - 0BF2
161};
162
163// FIXME: Should some of the bb's be pb's? (KA, NA, MA, YA, VA, etc. (approx 13))
164// U+C43 and U+C44 are _lm here not _dr.  Similar to the situation with U+CC3 and
165// U+CC4 in Kannada below.
166static const IndicClassTable::CharClass teluCharClasses[] =
167{
168    _xx, _mp, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C00 - 0C0F
169    _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C10 - 0C1F
170    _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0C20 - 0C2F
171    _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _da, _da, // 0C30 - 0C3F
172    _da, _dr, _dr, _lm, _lm, _xx, _a1, _da, _s1, _xx, _da, _da, _da, _vr, _xx, _xx, // 0C40 - 0C4F
173    _xx, _xx, _xx, _xx, _xx, _da, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0C50 - 0C5F
174    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0C60 - 0C6F
175};
176
177// U+CC3 and U+CC4 are _lm here not _dr since the Kannada rendering
178// rules want them below and to the right of the entire cluster
179//
180// There's some information about this in:
181//
182//  http://brahmi.sourceforge.net/docs/KannadaComputing.html
183static const IndicClassTable::CharClass kndaCharClasses[] =
184{
185    _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C80 - 0C8F
186    _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C90 - 0C9F
187    _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0CA0 - 0CAF
188    _rb, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _dr, _da, // 0CB0 - 0CBF
189    _s1, _dr, _r2, _lm, _lm, _xx, _a1, _s2, _s3, _xx, _s4, _s5, _da, _vr, _xx, _xx, // 0CC0 - 0CCF
190    _xx, _xx, _xx, _xx, _xx, _m3, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _ct, _xx, // 0CD0 - 0CDF
191    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0CE0 - 0CEF
192};
193
194// FIXME: this is correct for old-style Malayalam (MAL) but not for reformed Malayalam (MLR)
195// FIXME: should there be a REPH for old-style Malayalam?
196static const IndicClassTable::CharClass mlymCharClasses[] =
197{
198    _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0D00 - 0D0F
199    _iv, _xx, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0D10 - 0D1F
200    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _pb, // 0D20 - 0D2F
201    _fb, _fb, _bb, _ct, _ct, _pb, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0D30 - 0D3F
202    _dr, _dr, _dr, _dr, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0D40 - 0D4F
203    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0D50 - 0D5F
204    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  // 0D60 - 0D6F
205};
206
207static const IndicClassTable::CharClass sinhCharClasses[] =
208{
209    _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, // 0D80 - 0D8F
210    _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0D90 - 0D9F
211    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0DA0 - 0DAF
212    _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _xx, _xx, // 0DB0 - 0DBF
213    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _al, _xx, _xx, _xx, _xx, _dr, // 0DC0 - 0DCF
214    _dr, _dr, _da, _da, _db, _xx, _db, _xx, _dr, _dl, _s1, _dl, _s2, _s3, _s4, _dr, // 0DD0 - 0DDF
215    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0DE0 - 0DEF
216    _xx, _xx, _dr, _dr, _xx                                                         // 0DF0 - 0DF4
217};
218
219//
220// Split matra tables
221//
222static const SplitMatra bengSplitTable[] = {{0x09C7, 0x09BE}, {0x09C7, 0x09D7}};
223
224static const SplitMatra oryaSplitTable[] = {{0x0B47, 0x0B56}, {0x0B47, 0x0B3E}, {0x0B47, 0x0B57}};
225
226static const SplitMatra tamlSplitTable[] = {{0x0BC6, 0x0BBE}, {0x0BC7, 0x0BBE}, {0x0BC6, 0x0BD7}};
227
228static const SplitMatra teluSplitTable[] = {{0x0C46, 0x0C56}};
229
230static const SplitMatra kndaSplitTable[] = {{0x0CBF, 0x0CD5}, {0x0CC6, 0x0CD5}, {0x0CC6, 0x0CD6}, {0x0CC6, 0x0CC2},
231                                            {0x0CC6, 0x0CC2, 0x0CD5}};
232
233static const SplitMatra mlymSplitTable[] = {{0x0D46, 0x0D3E}, {0x0D47, 0x0D3E}, {0x0D46, 0x0D57}};
234
235
236static const SplitMatra sinhSplitTable[] = {{0x0DD9, 0x0DCA}, {0x0DD9, 0x0DCF}, {0x0DD9, 0x0DCF, 0x0DCA},
237                                            {0x0DD9, 0x0DDF}};
238//
239// Script Flags
240//
241
242// FIXME: post 'GSUB' reordering of MATRA_PRE's for Malayalam and Tamil
243// FIXME: reformed Malayalam needs to reorder VATTU to before base glyph...
244// FIXME: not sure passing ZWJ/ZWNJ is best way to render Malayalam Cillu...
245// FIXME: eyelash RA only for Devanagari??
246#define DEVA_SCRIPT_FLAGS (SF_EYELASH_RA | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
247#define BENG_SCRIPT_FLAGS (SF_REPH_AFTER_BELOW | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
248#define PUNJ_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
249#define GUJR_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
250#define ORYA_SCRIPT_FLAGS (SF_REPH_AFTER_BELOW | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
251#define TAML_SCRIPT_FLAGS (SF_MPRE_FIXUP | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
252#define TELU_SCRIPT_FLAGS (SF_MATRAS_AFTER_BASE | SF_FILTER_ZERO_WIDTH | 3)
253#define KNDA_SCRIPT_FLAGS (SF_MATRAS_AFTER_BASE | SF_FILTER_ZERO_WIDTH | 3)
254#define MLYM_SCRIPT_FLAGS (SF_MPRE_FIXUP | SF_NO_POST_BASE_LIMIT /*| SF_FILTER_ZERO_WIDTH*/)
255#define SINH_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT)
256
257//
258// Indic Class Tables
259//
260static const IndicClassTable devaClassTable = {0x0900, 0x0970, 2, DEVA_SCRIPT_FLAGS, devaCharClasses, NULL};
261
262static const IndicClassTable bengClassTable = {0x0980, 0x09FA, 3, BENG_SCRIPT_FLAGS, bengCharClasses, bengSplitTable};
263
264static const IndicClassTable punjClassTable = {0x0A00, 0x0A74, 2, PUNJ_SCRIPT_FLAGS, punjCharClasses, NULL};
265
266static const IndicClassTable gujrClassTable = {0x0A80, 0x0AEF, 2, GUJR_SCRIPT_FLAGS, gujrCharClasses, NULL};
267
268static const IndicClassTable oryaClassTable = {0x0B00, 0x0B71, 3, ORYA_SCRIPT_FLAGS, oryaCharClasses, oryaSplitTable};
269
270static const IndicClassTable tamlClassTable = {0x0B80, 0x0BF2, 3, TAML_SCRIPT_FLAGS, tamlCharClasses, tamlSplitTable};
271
272static const IndicClassTable teluClassTable = {0x0C00, 0x0C6F, 3, TELU_SCRIPT_FLAGS, teluCharClasses, teluSplitTable};
273
274static const IndicClassTable kndaClassTable = {0x0C80, 0x0CEF, 4, KNDA_SCRIPT_FLAGS, kndaCharClasses, kndaSplitTable};
275
276static const IndicClassTable mlymClassTable = {0x0D00, 0x0D6F, 4, MLYM_SCRIPT_FLAGS, mlymCharClasses, mlymSplitTable};
277
278static const IndicClassTable sinhClassTable = {0x0D80, 0x0DF4, 4, SINH_SCRIPT_FLAGS, sinhCharClasses, sinhSplitTable};
279
280//
281// IndicClassTable addresses
282//
283static const IndicClassTable * const indicClassTables[scriptCodeCount] = {
284    NULL,            /* 'zyyy' (COMMON) */
285    NULL,            /* 'qaai' (INHERITED) */
286    NULL,            /* 'arab' (ARABIC) */
287    NULL,            /* 'armn' (ARMENIAN) */
288    &bengClassTable, /* 'beng' (BENGALI) */
289    NULL,            /* 'bopo' (BOPOMOFO) */
290    NULL,            /* 'cher' (CHEROKEE) */
291    NULL,            /* 'copt' (COPTIC) */
292    NULL,            /* 'cyrl' (CYRILLIC) */
293    NULL,            /* 'dsrt' (DESERET) */
294    &devaClassTable, /* 'deva' (DEVANAGARI) */
295    NULL,            /* 'ethi' (ETHIOPIC) */
296    NULL,            /* 'geor' (GEORGIAN) */
297    NULL,            /* 'goth' (GOTHIC) */
298    NULL,            /* 'grek' (GREEK) */
299    &gujrClassTable, /* 'gujr' (GUJARATI) */
300    &punjClassTable, /* 'guru' (GURMUKHI) */
301    NULL,            /* 'hani' (HAN) */
302    NULL,            /* 'hang' (HANGUL) */
303    NULL,            /* 'hebr' (HEBREW) */
304    NULL,            /* 'hira' (HIRAGANA) */
305    &kndaClassTable, /* 'knda' (KANNADA) */
306    NULL,            /* 'kata' (KATAKANA) */
307    NULL,            /* 'khmr' (KHMER) */
308    NULL,            /* 'laoo' (LAO) */
309    NULL,            /* 'latn' (LATIN) */
310    &mlymClassTable, /* 'mlym' (MALAYALAM) */
311    NULL,            /* 'mong' (MONGOLIAN) */
312    NULL,            /* 'mymr' (MYANMAR) */
313    NULL,            /* 'ogam' (OGHAM) */
314    NULL,            /* 'ital' (OLD-ITALIC) */
315    &oryaClassTable, /* 'orya' (ORIYA) */
316    NULL,            /* 'runr' (RUNIC) */
317    &sinhClassTable, /* 'sinh' (SINHALA) */
318    NULL,            /* 'syrc' (SYRIAC) */
319    &tamlClassTable, /* 'taml' (TAMIL) */
320    &teluClassTable, /* 'telu' (TELUGU) */
321    NULL,            /* 'thaa' (THAANA) */
322    NULL,            /* 'thai' (THAI) */
323    NULL,            /* 'tibt' (TIBETAN) */
324    NULL,            /* 'cans' (CANADIAN-ABORIGINAL) */
325    NULL,            /* 'yiii' (YI) */
326    NULL,            /* 'tglg' (TAGALOG) */
327    NULL,            /* 'hano' (HANUNOO) */
328    NULL,            /* 'buhd' (BUHID) */
329    NULL,            /* 'tagb' (TAGBANWA) */
330    NULL,            /* 'brai' (BRAILLE) */
331    NULL,            /* 'cprt' (CYPRIOT) */
332    NULL,            /* 'limb' (LIMBU) */
333    NULL,            /* 'linb' (LINEAR_B) */
334    NULL,            /* 'osma' (OSMANYA) */
335    NULL,            /* 'shaw' (SHAVIAN) */
336    NULL,            /* 'tale' (TAI_LE) */
337    NULL,            /* 'ugar' (UGARITIC) */
338    NULL,            /* 'hrkt' (KATAKANA_OR_HIRAGANA) */
339    NULL,            /* 'bugi' (BUGINESE) */
340    NULL,            /* 'glag' (GLAGOLITIC) */
341    NULL,            /* 'khar' (KHAROSHTHI) */
342    NULL,            /* 'sylo' (SYLOTI_NAGRI) */
343    NULL,            /* 'talu' (NEW_TAI_LUE) */
344    NULL,            /* 'tfng' (TIFINAGH) */
345    NULL,            /* 'xpeo' (OLD_PERSIAN) */
346    NULL,            /* 'bali' (BALINESE) */
347    NULL,            /* 'batk' (BATK) */
348    NULL,            /* 'blis' (BLIS) */
349    NULL,            /* 'brah' (BRAH) */
350    NULL,            /* 'cham' (CHAM) */
351    NULL,            /* 'cirt' (CIRT) */
352    NULL,            /* 'cyrs' (CYRS) */
353    NULL,            /* 'egyd' (EGYD) */
354    NULL,            /* 'egyh' (EGYH) */
355    NULL,            /* 'egyp' (EGYP) */
356    NULL,            /* 'geok' (GEOK) */
357    NULL,            /* 'hans' (HANS) */
358    NULL,            /* 'hant' (HANT) */
359    NULL,            /* 'hmng' (HMNG) */
360    NULL,            /* 'hung' (HUNG) */
361    NULL,            /* 'inds' (INDS) */
362    NULL,            /* 'java' (JAVA) */
363    NULL,            /* 'kali' (KALI) */
364    NULL,            /* 'latf' (LATF) */
365    NULL,            /* 'latg' (LATG) */
366    NULL,            /* 'lepc' (LEPC) */
367    NULL,            /* 'lina' (LINA) */
368    NULL,            /* 'mand' (MAND) */
369    NULL,            /* 'maya' (MAYA) */
370    NULL,            /* 'mero' (MERO) */
371    NULL,            /* 'nko ' (NKO) */
372    NULL,            /* 'orkh' (ORKH) */
373    NULL,            /* 'perm' (PERM) */
374    NULL,            /* 'phag' (PHAGS_PA) */
375    NULL,            /* 'phnx' (PHOENICIAN) */
376    NULL,            /* 'plrd' (PLRD) */
377    NULL,            /* 'roro' (RORO) */
378    NULL,            /* 'sara' (SARA) */
379    NULL,            /* 'syre' (SYRE) */
380    NULL,            /* 'syrj' (SYRJ) */
381    NULL,            /* 'syrn' (SYRN) */
382    NULL,            /* 'teng' (TENG) */
383    NULL,            /* 'vai ' (VAII) */
384    NULL,            /* 'visp' (VISP) */
385    NULL,            /* 'xsux' (CUNEIFORM) */
386    NULL,            /* 'zxxx' (ZXXX) */
387    NULL,            /* 'zzzz' (UNKNOWN) */
388    NULL,            /* 'cari' (CARI) */
389    NULL,            /* 'jpan' (JPAN) */
390    NULL,            /* 'lana' (LANA) */
391    NULL,            /* 'lyci' (LYCI) */
392    NULL,            /* 'lydi' (LYDI) */
393    NULL,            /* 'olck' (OLCK) */
394    NULL,            /* 'rjng' (RJNG) */
395    NULL,            /* 'saur' (SAUR) */
396    NULL,            /* 'sgnw' (SGNW) */
397    NULL,            /* 'sund' (SUND) */
398    NULL,            /* 'moon' (MOON) */
399    NULL,            /* 'mtei' (MTEI) */
400    NULL,            /* 'armi' (ARMI) */
401    NULL,            /* 'avst' (AVST) */
402    NULL,            /* 'cakm' (CAKM) */
403    NULL,            /* 'kore' (KORE) */
404    NULL,            /* 'kthi' (KTHI) */
405    NULL,            /* 'mani' (MANI) */
406    NULL,            /* 'phli' (PHLI) */
407    NULL,            /* 'phlp' (PHLP) */
408    NULL,            /* 'phlv' (PHLV) */
409    NULL,            /* 'prti' (PRTI) */
410    NULL,            /* 'samr' (SAMR) */
411    NULL,            /* 'tavt' (TAVT) */
412    NULL,            /* 'zmth' (ZMTH) */
413    NULL,            /* 'zsym' (ZSYM) */
414    NULL,            /* 'bamu' (BAMUM) */
415    NULL,            /* 'lisu' (LISU) */
416    NULL,            /* 'nkgb' (NKGB) */
417    NULL             /* 'sarb' (OLD_SOUTH_ARABIAN) */
418};
419
420IndicClassTable::CharClass IndicClassTable::getCharClass(LEUnicode ch) const
421{
422    if (ch == C_SIGN_ZWJ) {
423        return CF_CONSONANT | CC_ZERO_WIDTH_MARK;
424    }
425
426    if (ch == C_SIGN_ZWNJ) {
427        return CC_ZERO_WIDTH_MARK;
428    }
429
430    if (ch < firstChar || ch > lastChar) {
431        return CC_RESERVED;
432    }
433
434    return classTable[ch - firstChar];
435}
436
437const IndicClassTable *IndicClassTable::getScriptClassTable(le_int32 scriptCode)
438{
439    if (scriptCode < 0 || scriptCode >= scriptCodeCount) {
440        return NULL;
441    }
442
443    return indicClassTables[scriptCode];
444}
445
446le_int32 IndicReordering::getWorstCaseExpansion(le_int32 scriptCode)
447{
448    const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode);
449
450    if (classTable == NULL) {
451        return 1;
452    }
453
454    return classTable->getWorstCaseExpansion();
455}
456
457le_bool IndicReordering::getFilterZeroWidth(le_int32 scriptCode)
458{
459    const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode);
460
461    if (classTable == NULL) {
462        return TRUE;
463    }
464
465    return classTable->getFilterZeroWidth();
466}
467
468U_NAMESPACE_END
469