1 /*
2 *
3 * (C) Copyright IBM Corp. 1998-2010 - 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 _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 //
78 static 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
90 static 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
102 static 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
114 static 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
126 static 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
138 static 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
151 static 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 static const IndicClassTable::CharClass teluCharClasses[] =
165 {
166 _xx, _mp, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C00 - 0C0F
167 _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C10 - 0C1F
168 _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0C20 - 0C2F
169 _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _da, _da, // 0C30 - 0C3F
170 _da, _dr, _dr, _dr, _dr, _xx, _a1, _da, _s1, _xx, _da, _da, _da, _vr, _xx, _xx, // 0C40 - 0C4F
171 _xx, _xx, _xx, _xx, _xx, _da, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0C50 - 0C5F
172 _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx // 0C60 - 0C6F
173 };
174
175 // U+CC3 and U+CC4 are _lm here not _dr since the Kannada rendering
176 // rules want them below and to the right of the entire cluster
177 //
178 // There's some information about this in:
179 //
180 // http://brahmi.sourceforge.net/docs/KannadaComputing.html
181 static const IndicClassTable::CharClass kndaCharClasses[] =
182 {
183 _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0C80 - 0C8F
184 _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, // 0C90 - 0C9F
185 _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, // 0CA0 - 0CAF
186 _rb, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _dr, _da, // 0CB0 - 0CBF
187 _s1, _dr, _r2, _lm, _lm, _xx, _a1, _s2, _s3, _xx, _s4, _s5, _da, _vr, _xx, _xx, // 0CC0 - 0CCF
188 _xx, _xx, _xx, _xx, _xx, _m3, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _ct, _xx, // 0CD0 - 0CDF
189 _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx // 0CE0 - 0CEF
190 };
191
192 // FIXME: this is correct for old-style Malayalam (MAL) but not for reformed Malayalam (MLR)
193 // FIXME: should there be a REPH for old-style Malayalam?
194 static const IndicClassTable::CharClass mlymCharClasses[] =
195 {
196 _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, // 0D00 - 0D0F
197 _iv, _xx, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0D10 - 0D1F
198 _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _pb, // 0D20 - 0D2F
199 _fb, _fb, _bb, _ct, _ct, _pb, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _r2, _dr, // 0D30 - 0D3F
200 _dr, _dr, _dr, _dr, _xx, _xx, _l1, _l1, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, // 0D40 - 0D4F
201 _xx, _xx, _xx, _xx, _xx, _xx, _xx, _m2, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0D50 - 0D5F
202 _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx // 0D60 - 0D6F
203 };
204
205 static const IndicClassTable::CharClass sinhCharClasses[] =
206 {
207 _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, // 0D80 - 0D8F
208 _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _ct, _ct, // 0D90 - 0D9F
209 _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, // 0DA0 - 0DAF
210 _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _xx, _xx, // 0DB0 - 0DBF
211 _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _al, _xx, _xx, _xx, _xx, _dr, // 0DC0 - 0DCF
212 _dr, _dr, _da, _da, _db, _xx, _db, _xx, _dr, _dl, _s1, _dl, _s2, _s3, _s4, _dr, // 0DD0 - 0DDF
213 _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, // 0DE0 - 0DEF
214 _xx, _xx, _dr, _dr, _xx // 0DF0 - 0DF4
215 };
216
217 //
218 // Split matra tables
219 //
220 static const SplitMatra bengSplitTable[] = {{0x09C7, 0x09BE}, {0x09C7, 0x09D7}};
221
222 static const SplitMatra oryaSplitTable[] = {{0x0B47, 0x0B56}, {0x0B47, 0x0B3E}, {0x0B47, 0x0B57}};
223
224 static const SplitMatra tamlSplitTable[] = {{0x0BC6, 0x0BBE}, {0x0BC7, 0x0BBE}, {0x0BC6, 0x0BD7}};
225
226 static const SplitMatra teluSplitTable[] = {{0x0C46, 0x0C56}};
227
228 static const SplitMatra kndaSplitTable[] = {{0x0CBF, 0x0CD5}, {0x0CC6, 0x0CD5}, {0x0CC6, 0x0CD6}, {0x0CC6, 0x0CC2},
229 {0x0CC6, 0x0CC2, 0x0CD5}};
230
231 static const SplitMatra mlymSplitTable[] = {{0x0D46, 0x0D3E}, {0x0D47, 0x0D3E}, {0x0D46, 0x0D57}};
232
233
234 static const SplitMatra sinhSplitTable[] = {{0x0DD9, 0x0DCA}, {0x0DD9, 0x0DCF}, {0x0DD9, 0x0DCF, 0x0DCA},
235 {0x0DD9, 0x0DDF}};
236 //
237 // Script Flags
238 //
239
240 // FIXME: post 'GSUB' reordering of MATRA_PRE's for Malayalam and Tamil
241 // FIXME: reformed Malayalam needs to reorder VATTU to before base glyph...
242 // FIXME: not sure passing ZWJ/ZWNJ is best way to render Malayalam Cillu...
243 // FIXME: eyelash RA only for Devanagari??
244 #define DEVA_SCRIPT_FLAGS (SF_EYELASH_RA | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
245 #define BENG_SCRIPT_FLAGS (SF_REPH_AFTER_BELOW | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
246 #define PUNJ_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
247 #define GUJR_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
248 #define ORYA_SCRIPT_FLAGS (SF_REPH_AFTER_BELOW | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
249 #define TAML_SCRIPT_FLAGS (SF_MPRE_FIXUP | SF_NO_POST_BASE_LIMIT | SF_FILTER_ZERO_WIDTH)
250 #define TELU_SCRIPT_FLAGS (SF_MATRAS_AFTER_BASE | SF_FILTER_ZERO_WIDTH | 3)
251 #define KNDA_SCRIPT_FLAGS (SF_MATRAS_AFTER_BASE | SF_FILTER_ZERO_WIDTH | 3)
252 #define MLYM_SCRIPT_FLAGS (SF_MPRE_FIXUP | SF_NO_POST_BASE_LIMIT /*| SF_FILTER_ZERO_WIDTH*/)
253 #define SINH_SCRIPT_FLAGS (SF_NO_POST_BASE_LIMIT)
254
255 //
256 // Indic Class Tables
257 //
258 static const IndicClassTable devaClassTable = {0x0900, 0x0970, 2, DEVA_SCRIPT_FLAGS, devaCharClasses, NULL};
259
260 static const IndicClassTable bengClassTable = {0x0980, 0x09FA, 3, BENG_SCRIPT_FLAGS, bengCharClasses, bengSplitTable};
261
262 static const IndicClassTable punjClassTable = {0x0A00, 0x0A74, 2, PUNJ_SCRIPT_FLAGS, punjCharClasses, NULL};
263
264 static const IndicClassTable gujrClassTable = {0x0A80, 0x0AEF, 2, GUJR_SCRIPT_FLAGS, gujrCharClasses, NULL};
265
266 static const IndicClassTable oryaClassTable = {0x0B00, 0x0B71, 3, ORYA_SCRIPT_FLAGS, oryaCharClasses, oryaSplitTable};
267
268 static const IndicClassTable tamlClassTable = {0x0B80, 0x0BF2, 3, TAML_SCRIPT_FLAGS, tamlCharClasses, tamlSplitTable};
269
270 static const IndicClassTable teluClassTable = {0x0C00, 0x0C6F, 3, TELU_SCRIPT_FLAGS, teluCharClasses, teluSplitTable};
271
272 static const IndicClassTable kndaClassTable = {0x0C80, 0x0CEF, 4, KNDA_SCRIPT_FLAGS, kndaCharClasses, kndaSplitTable};
273
274 static const IndicClassTable mlymClassTable = {0x0D00, 0x0D6F, 3, MLYM_SCRIPT_FLAGS, mlymCharClasses, mlymSplitTable};
275
276 static const IndicClassTable sinhClassTable = {0x0D80, 0x0DF4, 4, SINH_SCRIPT_FLAGS, sinhCharClasses, sinhSplitTable};
277
278 //
279 // IndicClassTable addresses
280 //
281 static const IndicClassTable * const indicClassTables[scriptCodeCount] = {
282 NULL, /* 'zyyy' (COMMON) */
283 NULL, /* 'qaai' (INHERITED) */
284 NULL, /* 'arab' (ARABIC) */
285 NULL, /* 'armn' (ARMENIAN) */
286 &bengClassTable, /* 'beng' (BENGALI) */
287 NULL, /* 'bopo' (BOPOMOFO) */
288 NULL, /* 'cher' (CHEROKEE) */
289 NULL, /* 'copt' (COPTIC) */
290 NULL, /* 'cyrl' (CYRILLIC) */
291 NULL, /* 'dsrt' (DESERET) */
292 &devaClassTable, /* 'deva' (DEVANAGARI) */
293 NULL, /* 'ethi' (ETHIOPIC) */
294 NULL, /* 'geor' (GEORGIAN) */
295 NULL, /* 'goth' (GOTHIC) */
296 NULL, /* 'grek' (GREEK) */
297 &gujrClassTable, /* 'gujr' (GUJARATI) */
298 &punjClassTable, /* 'guru' (GURMUKHI) */
299 NULL, /* 'hani' (HAN) */
300 NULL, /* 'hang' (HANGUL) */
301 NULL, /* 'hebr' (HEBREW) */
302 NULL, /* 'hira' (HIRAGANA) */
303 &kndaClassTable, /* 'knda' (KANNADA) */
304 NULL, /* 'kata' (KATAKANA) */
305 NULL, /* 'khmr' (KHMER) */
306 NULL, /* 'laoo' (LAO) */
307 NULL, /* 'latn' (LATIN) */
308 &mlymClassTable, /* 'mlym' (MALAYALAM) */
309 NULL, /* 'mong' (MONGOLIAN) */
310 NULL, /* 'mymr' (MYANMAR) */
311 NULL, /* 'ogam' (OGHAM) */
312 NULL, /* 'ital' (OLD-ITALIC) */
313 &oryaClassTable, /* 'orya' (ORIYA) */
314 NULL, /* 'runr' (RUNIC) */
315 &sinhClassTable, /* 'sinh' (SINHALA) */
316 NULL, /* 'syrc' (SYRIAC) */
317 &tamlClassTable, /* 'taml' (TAMIL) */
318 &teluClassTable, /* 'telu' (TELUGU) */
319 NULL, /* 'thaa' (THAANA) */
320 NULL, /* 'thai' (THAI) */
321 NULL, /* 'tibt' (TIBETAN) */
322 NULL, /* 'cans' (CANADIAN-ABORIGINAL) */
323 NULL, /* 'yiii' (YI) */
324 NULL, /* 'tglg' (TAGALOG) */
325 NULL, /* 'hano' (HANUNOO) */
326 NULL, /* 'buhd' (BUHID) */
327 NULL, /* 'tagb' (TAGBANWA) */
328 NULL, /* 'brai' (BRAILLE) */
329 NULL, /* 'cprt' (CYPRIOT) */
330 NULL, /* 'limb' (LIMBU) */
331 NULL, /* 'linb' (LINEAR_B) */
332 NULL, /* 'osma' (OSMANYA) */
333 NULL, /* 'shaw' (SHAVIAN) */
334 NULL, /* 'tale' (TAI_LE) */
335 NULL, /* 'ugar' (UGARITIC) */
336 NULL, /* 'hrkt' (KATAKANA_OR_HIRAGANA) */
337 NULL, /* 'bugi' (BUGINESE) */
338 NULL, /* 'glag' (GLAGOLITIC) */
339 NULL, /* 'khar' (KHAROSHTHI) */
340 NULL, /* 'sylo' (SYLOTI_NAGRI) */
341 NULL, /* 'talu' (NEW_TAI_LUE) */
342 NULL, /* 'tfng' (TIFINAGH) */
343 NULL, /* 'xpeo' (OLD_PERSIAN) */
344 NULL, /* 'bali' (BALINESE) */
345 NULL, /* 'batk' (BATK) */
346 NULL, /* 'blis' (BLIS) */
347 NULL, /* 'brah' (BRAH) */
348 NULL, /* 'cham' (CHAM) */
349 NULL, /* 'cirt' (CIRT) */
350 NULL, /* 'cyrs' (CYRS) */
351 NULL, /* 'egyd' (EGYD) */
352 NULL, /* 'egyh' (EGYH) */
353 NULL, /* 'egyp' (EGYP) */
354 NULL, /* 'geok' (GEOK) */
355 NULL, /* 'hans' (HANS) */
356 NULL, /* 'hant' (HANT) */
357 NULL, /* 'hmng' (HMNG) */
358 NULL, /* 'hung' (HUNG) */
359 NULL, /* 'inds' (INDS) */
360 NULL, /* 'java' (JAVA) */
361 NULL, /* 'kali' (KALI) */
362 NULL, /* 'latf' (LATF) */
363 NULL, /* 'latg' (LATG) */
364 NULL, /* 'lepc' (LEPC) */
365 NULL, /* 'lina' (LINA) */
366 NULL, /* 'mand' (MAND) */
367 NULL, /* 'maya' (MAYA) */
368 NULL, /* 'mero' (MERO) */
369 NULL, /* 'nko ' (NKO) */
370 NULL, /* 'orkh' (ORKH) */
371 NULL, /* 'perm' (PERM) */
372 NULL, /* 'phag' (PHAGS_PA) */
373 NULL, /* 'phnx' (PHOENICIAN) */
374 NULL, /* 'plrd' (PLRD) */
375 NULL, /* 'roro' (RORO) */
376 NULL, /* 'sara' (SARA) */
377 NULL, /* 'syre' (SYRE) */
378 NULL, /* 'syrj' (SYRJ) */
379 NULL, /* 'syrn' (SYRN) */
380 NULL, /* 'teng' (TENG) */
381 NULL, /* 'vai ' (VAII) */
382 NULL, /* 'visp' (VISP) */
383 NULL, /* 'xsux' (CUNEIFORM) */
384 NULL, /* 'zxxx' (ZXXX) */
385 NULL, /* 'zzzz' (UNKNOWN) */
386 NULL, /* 'cari' (CARI) */
387 NULL, /* 'jpan' (JPAN) */
388 NULL, /* 'lana' (LANA) */
389 NULL, /* 'lyci' (LYCI) */
390 NULL, /* 'lydi' (LYDI) */
391 NULL, /* 'olck' (OLCK) */
392 NULL, /* 'rjng' (RJNG) */
393 NULL, /* 'saur' (SAUR) */
394 NULL, /* 'sgnw' (SGNW) */
395 NULL, /* 'sund' (SUND) */
396 NULL, /* 'moon' (MOON) */
397 NULL, /* 'mtei' (MTEI) */
398 NULL, /* 'armi' (ARMI) */
399 NULL, /* 'avst' (AVST) */
400 NULL, /* 'cakm' (CAKM) */
401 NULL, /* 'kore' (KORE) */
402 NULL, /* 'kthi' (KTHI) */
403 NULL, /* 'mani' (MANI) */
404 NULL, /* 'phli' (PHLI) */
405 NULL, /* 'phlp' (PHLP) */
406 NULL, /* 'phlv' (PHLV) */
407 NULL, /* 'prti' (PRTI) */
408 NULL, /* 'samr' (SAMR) */
409 NULL, /* 'tavt' (TAVT) */
410 NULL, /* 'zmth' (ZMTH) */
411 NULL, /* 'zsym' (ZSYM) */
412 NULL, /* 'bamu' (BAMUM) */
413 NULL, /* 'lisu' (LISU) */
414 NULL, /* 'nkgb' (NKGB) */
415 NULL /* 'sarb' (OLD_SOUTH_ARABIAN) */
416 };
417
getCharClass(LEUnicode ch) const418 IndicClassTable::CharClass IndicClassTable::getCharClass(LEUnicode ch) const
419 {
420 if (ch == C_SIGN_ZWJ) {
421 return CF_CONSONANT | CC_ZERO_WIDTH_MARK;
422 }
423
424 if (ch == C_SIGN_ZWNJ) {
425 return CC_ZERO_WIDTH_MARK;
426 }
427
428 if (ch < firstChar || ch > lastChar) {
429 return CC_RESERVED;
430 }
431
432 return classTable[ch - firstChar];
433 }
434
getScriptClassTable(le_int32 scriptCode)435 const IndicClassTable *IndicClassTable::getScriptClassTable(le_int32 scriptCode)
436 {
437 if (scriptCode < 0 || scriptCode >= scriptCodeCount) {
438 return NULL;
439 }
440
441 return indicClassTables[scriptCode];
442 }
443
getWorstCaseExpansion(le_int32 scriptCode)444 le_int32 IndicReordering::getWorstCaseExpansion(le_int32 scriptCode)
445 {
446 const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode);
447
448 if (classTable == NULL) {
449 return 1;
450 }
451
452 return classTable->getWorstCaseExpansion();
453 }
454
getFilterZeroWidth(le_int32 scriptCode)455 le_bool IndicReordering::getFilterZeroWidth(le_int32 scriptCode)
456 {
457 const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(scriptCode);
458
459 if (classTable == NULL) {
460 return TRUE;
461 }
462
463 return classTable->getFilterZeroWidth();
464 }
465
466 U_NAMESPACE_END
467