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gfx/thebes/nsUnicodeRange.cpp@97036ab72558 (annotated)

gfx/thebes/nsUnicodeRange.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Tue, 06 Jan 2015 21:39:09 +0100
branch
TOR_BUG_9701
changeset 8
97036ab72558
permissions
-rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0 2 /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0 3 * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0 5
michael@0 6 #include "nsUnicodeRange.h"
michael@0 7 #include "nsGkAtoms.h"
michael@0 8 #include "mozilla/NullPtr.h"
michael@0 9
michael@0 10 // This table depends on unicode range definitions.
michael@0 11 // Each item's index must correspond unicode range value
michael@0 12 // eg. x-cyrillic = LangGroupTable[kRangeCyrillic]
michael@0 13 static nsIAtom **gUnicodeRangeToLangGroupAtomTable[] =
michael@0 14 {
michael@0 15 &nsGkAtoms::x_cyrillic,
michael@0 16 &nsGkAtoms::el_,
michael@0 17 &nsGkAtoms::tr,
michael@0 18 &nsGkAtoms::he,
michael@0 19 &nsGkAtoms::ar,
michael@0 20 &nsGkAtoms::x_baltic,
michael@0 21 &nsGkAtoms::th,
michael@0 22 &nsGkAtoms::ko,
michael@0 23 &nsGkAtoms::Japanese,
michael@0 24 &nsGkAtoms::zh_cn,
michael@0 25 &nsGkAtoms::zh_tw,
michael@0 26 &nsGkAtoms::x_devanagari,
michael@0 27 &nsGkAtoms::x_tamil,
michael@0 28 &nsGkAtoms::x_armn,
michael@0 29 &nsGkAtoms::x_beng,
michael@0 30 &nsGkAtoms::x_cans,
michael@0 31 &nsGkAtoms::x_ethi,
michael@0 32 &nsGkAtoms::x_geor,
michael@0 33 &nsGkAtoms::x_gujr,
michael@0 34 &nsGkAtoms::x_guru,
michael@0 35 &nsGkAtoms::x_khmr,
michael@0 36 &nsGkAtoms::x_mlym,
michael@0 37 &nsGkAtoms::x_orya,
michael@0 38 &nsGkAtoms::x_telu,
michael@0 39 &nsGkAtoms::x_knda,
michael@0 40 &nsGkAtoms::x_sinh,
michael@0 41 &nsGkAtoms::x_tibt
michael@0 42 };
michael@0 43
michael@0 44 /**********************************************************************
michael@0 45 * Unicode subranges as defined in unicode 3.0
michael@0 46 * x-western, x-central-euro, tr, x-baltic -> latin
michael@0 47 * 0000 - 036f
michael@0 48 * 1e00 - 1eff
michael@0 49 * 2000 - 206f (general punctuation)
michael@0 50 * 20a0 - 20cf (currency symbols)
michael@0 51 * 2100 - 214f (letterlike symbols)
michael@0 52 * 2150 - 218f (Number Forms)
michael@0 53 * el -> greek
michael@0 54 * 0370 - 03ff
michael@0 55 * 1f00 - 1fff
michael@0 56 * x-cyrillic -> cyrillic
michael@0 57 * 0400 - 04ff
michael@0 58 * he -> hebrew
michael@0 59 * 0590 - 05ff
michael@0 60 * ar -> arabic
michael@0 61 * 0600 - 06ff
michael@0 62 * fb50 - fdff (arabic presentation forms)
michael@0 63 * fe70 - feff (arabic presentation forms b)
michael@0 64 * th - thai
michael@0 65 * 0e00 - 0e7f
michael@0 66 * ko -> korean
michael@0 67 * ac00 - d7af (hangul Syllables)
michael@0 68 * 1100 - 11ff (jamo)
michael@0 69 * 3130 - 318f (hangul compatibility jamo)
michael@0 70 * ja
michael@0 71 * 3040 - 309f (hiragana)
michael@0 72 * 30a0 - 30ff (katakana)
michael@0 73 * zh-CN
michael@0 74 * zh-TW
michael@0 75 *
michael@0 76 * CJK
michael@0 77 * 3100 - 312f (bopomofo)
michael@0 78 * 31a0 - 31bf (bopomofo extended)
michael@0 79 * 3000 - 303f (CJK Symbols and Punctuation)
michael@0 80 * 2e80 - 2eff (CJK radicals supplement)
michael@0 81 * 2f00 - 2fdf (Kangxi Radicals)
michael@0 82 * 2ff0 - 2fff (Ideographic Description Characters)
michael@0 83 * 3190 - 319f (kanbun)
michael@0 84 * 3200 - 32ff (Enclosed CJK letters and Months)
michael@0 85 * 3300 - 33ff (CJK compatibility)
michael@0 86 * 3400 - 4dbf (CJK Unified Ideographs Extension A)
michael@0 87 * 4e00 - 9faf (CJK Unified Ideographs)
michael@0 88 * f900 - fa5f (CJK Compatibility Ideographs)
michael@0 89 * fe30 - fe4f (CJK compatibility Forms)
michael@0 90 * ff00 - ffef (halfwidth and fullwidth forms)
michael@0 91 *
michael@0 92 * Armenian
michael@0 93 * 0530 - 058f
michael@0 94 * Sriac
michael@0 95 * 0700 - 074f
michael@0 96 * Thaana
michael@0 97 * 0780 - 07bf
michael@0 98 * Devanagari
michael@0 99 * 0900 - 097f
michael@0 100 * Bengali
michael@0 101 * 0980 - 09ff
michael@0 102 * Gurmukhi
michael@0 103 * 0a00 - 0a7f
michael@0 104 * Gujarati
michael@0 105 * 0a80 - 0aff
michael@0 106 * Oriya
michael@0 107 * 0b00 - 0b7f
michael@0 108 * Tamil
michael@0 109 * 0b80 - 0bff
michael@0 110 * Telugu
michael@0 111 * 0c00 - 0c7f
michael@0 112 * Kannada
michael@0 113 * 0c80 - 0cff
michael@0 114 * Malayalam
michael@0 115 * 0d00 - 0d7f
michael@0 116 * Sinhala
michael@0 117 * 0d80 - 0def
michael@0 118 * Lao
michael@0 119 * 0e80 - 0eff
michael@0 120 * Tibetan
michael@0 121 * 0f00 - 0fbf
michael@0 122 * Myanmar
michael@0 123 * 1000 - 109f
michael@0 124 * Georgian
michael@0 125 * 10a0 - 10ff
michael@0 126 * Ethiopic
michael@0 127 * 1200 - 137f
michael@0 128 * Cherokee
michael@0 129 * 13a0 - 13ff
michael@0 130 * Canadian Aboriginal Syllabics
michael@0 131 * 1400 - 167f
michael@0 132 * Ogham
michael@0 133 * 1680 - 169f
michael@0 134 * Runic
michael@0 135 * 16a0 - 16ff
michael@0 136 * Khmer
michael@0 137 * 1780 - 17ff
michael@0 138 * Mongolian
michael@0 139 * 1800 - 18af
michael@0 140 * Misc - superscripts and subscripts
michael@0 141 * 2070 - 209f
michael@0 142 * Misc - Combining Diacritical Marks for Symbols
michael@0 143 * 20d0 - 20ff
michael@0 144 * Misc - Arrows
michael@0 145 * 2190 - 21ff
michael@0 146 * Misc - Mathematical Operators
michael@0 147 * 2200 - 22ff
michael@0 148 * Misc - Miscellaneous Technical
michael@0 149 * 2300 - 23ff
michael@0 150 * Misc - Control picture
michael@0 151 * 2400 - 243f
michael@0 152 * Misc - Optical character recognition
michael@0 153 * 2440 - 2450
michael@0 154 * Misc - Enclose Alphanumerics
michael@0 155 * 2460 - 24ff
michael@0 156 * Misc - Box Drawing
michael@0 157 * 2500 - 257f
michael@0 158 * Misc - Block Elements
michael@0 159 * 2580 - 259f
michael@0 160 * Misc - Geometric Shapes
michael@0 161 * 25a0 - 25ff
michael@0 162 * Misc - Miscellaneous Symbols
michael@0 163 * 2600 - 267f
michael@0 164 * Misc - Dingbats
michael@0 165 * 2700 - 27bf
michael@0 166 * Misc - Braille Patterns
michael@0 167 * 2800 - 28ff
michael@0 168 * Yi Syllables
michael@0 169 * a000 - a48f
michael@0 170 * Yi radicals
michael@0 171 * a490 - a4cf
michael@0 172 * Alphabetic Presentation Forms
michael@0 173 * fb00 - fb4f
michael@0 174 * Misc - Combining half Marks
michael@0 175 * fe20 - fe2f
michael@0 176 * Misc - small form variants
michael@0 177 * fe50 - fe6f
michael@0 178 * Misc - Specials
michael@0 179 * fff0 - ffff
michael@0 180 *********************************************************************/
michael@0 181
michael@0 182
michael@0 183
michael@0 184 #define NUM_OF_SUBTABLES 10
michael@0 185 #define SUBTABLE_SIZE 16
michael@0 186
michael@0 187 static const uint8_t gUnicodeSubrangeTable[NUM_OF_SUBTABLES][SUBTABLE_SIZE] =
michael@0 188 {
michael@0 189 { // table for X---
michael@0 190 kRangeTableBase+1, //u0xxx
michael@0 191 kRangeTableBase+2, //u1xxx
michael@0 192 kRangeTableBase+3, //u2xxx
michael@0 193 kRangeSetCJK, //u3xxx
michael@0 194 kRangeSetCJK, //u4xxx
michael@0 195 kRangeSetCJK, //u5xxx
michael@0 196 kRangeSetCJK, //u6xxx
michael@0 197 kRangeSetCJK, //u7xxx
michael@0 198 kRangeSetCJK, //u8xxx
michael@0 199 kRangeSetCJK, //u9xxx
michael@0 200 kRangeTableBase+4, //uaxxx
michael@0 201 kRangeKorean, //ubxxx
michael@0 202 kRangeKorean, //ucxxx
michael@0 203 kRangeTableBase+5, //udxxx
michael@0 204 kRangePrivate, //uexxx
michael@0 205 kRangeTableBase+6 //ufxxx
michael@0 206 },
michael@0 207 { //table for 0X--
michael@0 208 kRangeSetLatin, //u00xx
michael@0 209 kRangeSetLatin, //u01xx
michael@0 210 kRangeSetLatin, //u02xx
michael@0 211 kRangeGreek, //u03xx XXX 0300-036f is in fact kRangeCombiningDiacriticalMarks
michael@0 212 kRangeCyrillic, //u04xx
michael@0 213 kRangeTableBase+7, //u05xx, includes Cyrillic supplement, Hebrew, and Armenian
michael@0 214 kRangeArabic, //u06xx
michael@0 215 kRangeTertiaryTable, //u07xx
michael@0 216 kRangeUnassigned, //u08xx
michael@0 217 kRangeTertiaryTable, //u09xx
michael@0 218 kRangeTertiaryTable, //u0axx
michael@0 219 kRangeTertiaryTable, //u0bxx
michael@0 220 kRangeTertiaryTable, //u0cxx
michael@0 221 kRangeTertiaryTable, //u0dxx
michael@0 222 kRangeTertiaryTable, //u0exx
michael@0 223 kRangeTibetan //u0fxx
michael@0 224 },
michael@0 225 { //table for 1x--
michael@0 226 kRangeTertiaryTable, //u10xx
michael@0 227 kRangeKorean, //u11xx
michael@0 228 kRangeEthiopic, //u12xx
michael@0 229 kRangeTertiaryTable, //u13xx
michael@0 230 kRangeCanadian, //u14xx
michael@0 231 kRangeCanadian, //u15xx
michael@0 232 kRangeTertiaryTable, //u16xx
michael@0 233 kRangeKhmer, //u17xx
michael@0 234 kRangeMongolian, //u18xx
michael@0 235 kRangeUnassigned, //u19xx
michael@0 236 kRangeUnassigned, //u1axx
michael@0 237 kRangeUnassigned, //u1bxx
michael@0 238 kRangeUnassigned, //u1cxx
michael@0 239 kRangeUnassigned, //u1dxx
michael@0 240 kRangeSetLatin, //u1exx
michael@0 241 kRangeGreek //u1fxx
michael@0 242 },
michael@0 243 { //table for 2x--
michael@0 244 kRangeSetLatin, //u20xx
michael@0 245 kRangeSetLatin, //u21xx
michael@0 246 kRangeMathOperators, //u22xx
michael@0 247 kRangeMiscTechnical, //u23xx
michael@0 248 kRangeControlOpticalEnclose, //u24xx
michael@0 249 kRangeBoxBlockGeometrics, //u25xx
michael@0 250 kRangeMiscSymbols, //u26xx
michael@0 251 kRangeDingbats, //u27xx
michael@0 252 kRangeBraillePattern, //u28xx
michael@0 253 kRangeUnassigned, //u29xx
michael@0 254 kRangeUnassigned, //u2axx
michael@0 255 kRangeUnassigned, //u2bxx
michael@0 256 kRangeUnassigned, //u2cxx
michael@0 257 kRangeUnassigned, //u2dxx
michael@0 258 kRangeSetCJK, //u2exx
michael@0 259 kRangeSetCJK //u2fxx
michael@0 260 },
michael@0 261 { //table for ax--
michael@0 262 kRangeYi, //ua0xx
michael@0 263 kRangeYi, //ua1xx
michael@0 264 kRangeYi, //ua2xx
michael@0 265 kRangeYi, //ua3xx
michael@0 266 kRangeYi, //ua4xx
michael@0 267 kRangeUnassigned, //ua5xx
michael@0 268 kRangeUnassigned, //ua6xx
michael@0 269 kRangeUnassigned, //ua7xx
michael@0 270 kRangeUnassigned, //ua8xx
michael@0 271 kRangeUnassigned, //ua9xx
michael@0 272 kRangeUnassigned, //uaaxx
michael@0 273 kRangeUnassigned, //uabxx
michael@0 274 kRangeKorean, //uacxx
michael@0 275 kRangeKorean, //uadxx
michael@0 276 kRangeKorean, //uaexx
michael@0 277 kRangeKorean //uafxx
michael@0 278 },
michael@0 279 { //table for dx--
michael@0 280 kRangeKorean, //ud0xx
michael@0 281 kRangeKorean, //ud1xx
michael@0 282 kRangeKorean, //ud2xx
michael@0 283 kRangeKorean, //ud3xx
michael@0 284 kRangeKorean, //ud4xx
michael@0 285 kRangeKorean, //ud5xx
michael@0 286 kRangeKorean, //ud6xx
michael@0 287 kRangeKorean, //ud7xx
michael@0 288 kRangeSurrogate, //ud8xx
michael@0 289 kRangeSurrogate, //ud9xx
michael@0 290 kRangeSurrogate, //udaxx
michael@0 291 kRangeSurrogate, //udbxx
michael@0 292 kRangeSurrogate, //udcxx
michael@0 293 kRangeSurrogate, //uddxx
michael@0 294 kRangeSurrogate, //udexx
michael@0 295 kRangeSurrogate //udfxx
michael@0 296 },
michael@0 297 { // table for fx--
michael@0 298 kRangePrivate, //uf0xx
michael@0 299 kRangePrivate, //uf1xx
michael@0 300 kRangePrivate, //uf2xx
michael@0 301 kRangePrivate, //uf3xx
michael@0 302 kRangePrivate, //uf4xx
michael@0 303 kRangePrivate, //uf5xx
michael@0 304 kRangePrivate, //uf6xx
michael@0 305 kRangePrivate, //uf7xx
michael@0 306 kRangePrivate, //uf8xx
michael@0 307 kRangeSetCJK, //uf9xx
michael@0 308 kRangeSetCJK, //ufaxx
michael@0 309 kRangeArabic, //ufbxx, includes alphabic presentation form
michael@0 310 kRangeArabic, //ufcxx
michael@0 311 kRangeArabic, //ufdxx
michael@0 312 kRangeTableBase+8, //ufexx
michael@0 313 kRangeTableBase+9 //uffxx, halfwidth and fullwidth forms, includes Specials
michael@0 314 },
michael@0 315 { //table for 0x0500 - 0x05ff
michael@0 316 kRangeCyrillic, //u050x
michael@0 317 kRangeCyrillic, //u051x
michael@0 318 kRangeCyrillic, //u052x
michael@0 319 kRangeArmenian, //u053x
michael@0 320 kRangeArmenian, //u054x
michael@0 321 kRangeArmenian, //u055x
michael@0 322 kRangeArmenian, //u056x
michael@0 323 kRangeArmenian, //u057x
michael@0 324 kRangeArmenian, //u058x
michael@0 325 kRangeHebrew, //u059x
michael@0 326 kRangeHebrew, //u05ax
michael@0 327 kRangeHebrew, //u05bx
michael@0 328 kRangeHebrew, //u05cx
michael@0 329 kRangeHebrew, //u05dx
michael@0 330 kRangeHebrew, //u05ex
michael@0 331 kRangeHebrew //u05fx
michael@0 332 },
michael@0 333 { //table for 0xfe00 - 0xfeff
michael@0 334 kRangeSetCJK, //ufe0x
michael@0 335 kRangeSetCJK, //ufe1x
michael@0 336 kRangeSetCJK, //ufe2x
michael@0 337 kRangeSetCJK, //ufe3x
michael@0 338 kRangeSetCJK, //ufe4x
michael@0 339 kRangeSetCJK, //ufe5x
michael@0 340 kRangeSetCJK, //ufe6x
michael@0 341 kRangeArabic, //ufe7x
michael@0 342 kRangeArabic, //ufe8x
michael@0 343 kRangeArabic, //ufe9x
michael@0 344 kRangeArabic, //ufeax
michael@0 345 kRangeArabic, //ufebx
michael@0 346 kRangeArabic, //ufecx
michael@0 347 kRangeArabic, //ufedx
michael@0 348 kRangeArabic, //ufeex
michael@0 349 kRangeArabic //ufefx
michael@0 350 },
michael@0 351 { //table for 0xff00 - 0xffff
michael@0 352 kRangeSetCJK, //uff0x, fullwidth latin
michael@0 353 kRangeSetCJK, //uff1x, fullwidth latin
michael@0 354 kRangeSetCJK, //uff2x, fullwidth latin
michael@0 355 kRangeSetCJK, //uff3x, fullwidth latin
michael@0 356 kRangeSetCJK, //uff4x, fullwidth latin
michael@0 357 kRangeSetCJK, //uff5x, fullwidth latin
michael@0 358 kRangeSetCJK, //uff6x, halfwidth katakana
michael@0 359 kRangeSetCJK, //uff7x, halfwidth katakana
michael@0 360 kRangeSetCJK, //uff8x, halfwidth katakana
michael@0 361 kRangeSetCJK, //uff9x, halfwidth katakana
michael@0 362 kRangeSetCJK, //uffax, halfwidth hangul jamo
michael@0 363 kRangeSetCJK, //uffbx, halfwidth hangul jamo
michael@0 364 kRangeSetCJK, //uffcx, halfwidth hangul jamo
michael@0 365 kRangeSetCJK, //uffdx, halfwidth hangul jamo
michael@0 366 kRangeSetCJK, //uffex, fullwidth symbols
michael@0 367 kRangeSpecials, //ufffx, Specials
michael@0 368 },
michael@0 369 };
michael@0 370
michael@0 371 // Most scripts between U+0700 and U+16FF are assigned a chunk of 128 (0x80)
michael@0 372 // code points so that the number of entries in the tertiary range
michael@0 373 // table for that range is obtained by dividing (0x1700 - 0x0700) by 128.
michael@0 374 // Exceptions: Ethiopic, Tibetan, Hangul Jamo and Canadian aboriginal
michael@0 375 // syllabaries take multiple chunks and Ogham and Runic share a single chunk.
michael@0 376 #define TERTIARY_TABLE_SIZE ((0x1700 - 0x0700) / 0x80)
michael@0 377
michael@0 378 static const uint8_t gUnicodeTertiaryRangeTable[TERTIARY_TABLE_SIZE] =
michael@0 379 { //table for 0x0700 - 0x1600
michael@0 380 kRangeSyriac, //u070x
michael@0 381 kRangeThaana, //u078x
michael@0 382 kRangeUnassigned, //u080x place holder(resolved in the 2ndary tab.)
michael@0 383 kRangeUnassigned, //u088x place holder(resolved in the 2ndary tab.)
michael@0 384 kRangeDevanagari, //u090x
michael@0 385 kRangeBengali, //u098x
michael@0 386 kRangeGurmukhi, //u0a0x
michael@0 387 kRangeGujarati, //u0a8x
michael@0 388 kRangeOriya, //u0b0x
michael@0 389 kRangeTamil, //u0b8x
michael@0 390 kRangeTelugu, //u0c0x
michael@0 391 kRangeKannada, //u0c8x
michael@0 392 kRangeMalayalam, //u0d0x
michael@0 393 kRangeSinhala, //u0d8x
michael@0 394 kRangeThai, //u0e0x
michael@0 395 kRangeLao, //u0e8x
michael@0 396 kRangeTibetan, //u0f0x place holder(resolved in the 2ndary tab.)
michael@0 397 kRangeTibetan, //u0f8x place holder(resolved in the 2ndary tab.)
michael@0 398 kRangeMyanmar, //u100x
michael@0 399 kRangeGeorgian, //u108x
michael@0 400 kRangeKorean, //u110x place holder(resolved in the 2ndary tab.)
michael@0 401 kRangeKorean, //u118x place holder(resolved in the 2ndary tab.)
michael@0 402 kRangeEthiopic, //u120x place holder(resolved in the 2ndary tab.)
michael@0 403 kRangeEthiopic, //u128x place holder(resolved in the 2ndary tab.)
michael@0 404 kRangeEthiopic, //u130x
michael@0 405 kRangeCherokee, //u138x
michael@0 406 kRangeCanadian, //u140x place holder(resolved in the 2ndary tab.)
michael@0 407 kRangeCanadian, //u148x place holder(resolved in the 2ndary tab.)
michael@0 408 kRangeCanadian, //u150x place holder(resolved in the 2ndary tab.)
michael@0 409 kRangeCanadian, //u158x place holder(resolved in the 2ndary tab.)
michael@0 410 kRangeCanadian, //u160x
michael@0 411 kRangeOghamRunic //u168x this contains two scripts, Ogham & Runic
michael@0 412 };
michael@0 413
michael@0 414 // A two level index is almost enough for locating a range, with the
michael@0 415 // exception of u03xx and u05xx. Since we don't really care about range for
michael@0 416 // combining diacritical marks in our font application, they are
michael@0 417 // not discriminated further. But future adoption of this module for other use
michael@0 418 // should be aware of this limitation. The implementation can be extended if
michael@0 419 // there is such a need.
michael@0 420 // For Indic, Southeast Asian scripts and some other scripts between
michael@0 421 // U+0700 and U+16FF, it's extended to the third level.
michael@0 422 uint32_t FindCharUnicodeRange(uint32_t ch)
michael@0 423 {
michael@0 424 uint32_t range;
michael@0 425
michael@0 426 // aggregate ranges for non-BMP codepoints
michael@0 427 if (ch > 0xFFFF) {
michael@0 428 uint32_t p = (ch >> 16);
michael@0 429 if (p == 1) {
michael@0 430 return kRangeSMP;
michael@0 431 } else if (p == 2) {
michael@0 432 return kRangeSetCJK;
michael@0 433 }
michael@0 434 return kRangeHigherPlanes;
michael@0 435 }
michael@0 436
michael@0 437 // lookup explicit range for BMP codepoints
michael@0 438 // first general range
michael@0 439 range = gUnicodeSubrangeTable[0][ch >> 12];
michael@0 440
michael@0 441 // if general range is good enough, return that
michael@0 442 if (range < kRangeTableBase)
michael@0 443 // we try to get a specific range
michael@0 444 return range;
michael@0 445
michael@0 446 // otherwise, use subrange tables
michael@0 447 range = gUnicodeSubrangeTable[range - kRangeTableBase][(ch & 0x0f00) >> 8];
michael@0 448 if (range < kRangeTableBase)
michael@0 449 return range;
michael@0 450 if (range < kRangeTertiaryTable)
michael@0 451 return gUnicodeSubrangeTable[range - kRangeTableBase][(ch & 0x00f0) >> 4];
michael@0 452
michael@0 453 // Yet another table to look at : U+0700 - U+16FF : 128 code point blocks
michael@0 454 return gUnicodeTertiaryRangeTable[(ch - 0x0700) >> 7];
michael@0 455 }
michael@0 456
michael@0 457 nsIAtom *LangGroupFromUnicodeRange(uint8_t unicodeRange)
michael@0 458 {
michael@0 459 if (kRangeSpecificItemNum > unicodeRange) {
michael@0 460 nsIAtom **atom = gUnicodeRangeToLangGroupAtomTable[unicodeRange];
michael@0 461 return *atom;
michael@0 462 }
michael@0 463 return nullptr;
michael@0 464 }

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