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420 lines
14 KiB
C++
420 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsUnicodeRange.h"
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/**********************************************************************
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* Unicode subranges as defined in unicode 3.0
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* x-western -> latin
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* 0000 - 036f
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* 1e00 - 1eff
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* 2000 - 206f (general punctuation)
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* 20a0 - 20cf (currency symbols)
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* 2100 - 214f (letterlike symbols)
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* 2150 - 218f (Number Forms)
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* el -> greek
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* 0370 - 03ff
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* 1f00 - 1fff
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* x-cyrillic -> cyrillic
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* 0400 - 04ff
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* he -> hebrew
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* 0590 - 05ff
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* ar -> arabic
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* 0600 - 06ff
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* fb50 - fdff (arabic presentation forms)
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* fe70 - feff (arabic presentation forms b)
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* th - thai
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* 0e00 - 0e7f
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* ko -> korean
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* ac00 - d7af (hangul Syllables)
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* 1100 - 11ff (jamo)
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* 3130 - 318f (hangul compatibility jamo)
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* ja
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* 3040 - 309f (hiragana)
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* 30a0 - 30ff (katakana)
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* zh-CN
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* zh-TW
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*
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* CJK
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* 3100 - 312f (bopomofo)
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* 31a0 - 31bf (bopomofo extended)
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* 3000 - 303f (CJK Symbols and Punctuation)
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* 2e80 - 2eff (CJK radicals supplement)
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* 2f00 - 2fdf (Kangxi Radicals)
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* 2ff0 - 2fff (Ideographic Description Characters)
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* 3190 - 319f (kanbun)
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* 3200 - 32ff (Enclosed CJK letters and Months)
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* 3300 - 33ff (CJK compatibility)
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* 3400 - 4dbf (CJK Unified Ideographs Extension A)
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* 4e00 - 9faf (CJK Unified Ideographs)
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* f900 - fa5f (CJK Compatibility Ideographs)
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* fe30 - fe4f (CJK compatibility Forms)
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* ff00 - ffef (halfwidth and fullwidth forms)
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*
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* Armenian
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* 0530 - 058f
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* Sriac
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* 0700 - 074f
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* Thaana
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* 0780 - 07bf
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* Devanagari
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* 0900 - 097f
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* Bengali
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* 0980 - 09ff
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* Gurmukhi
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* 0a00 - 0a7f
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* Gujarati
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* 0a80 - 0aff
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* Oriya
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* 0b00 - 0b7f
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* Tamil
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* 0b80 - 0bff
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* Telugu
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* 0c00 - 0c7f
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* Kannada
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* 0c80 - 0cff
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* Malayalam
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* 0d00 - 0d7f
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* Sinhala
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* 0d80 - 0def
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* Lao
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* 0e80 - 0eff
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* Tibetan
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* 0f00 - 0fbf
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* Myanmar
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* 1000 - 109f
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* Georgian
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* 10a0 - 10ff
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* Ethiopic
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* 1200 - 137f
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* Cherokee
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* 13a0 - 13ff
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* Canadian Aboriginal Syllabics
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* 1400 - 167f
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* Ogham
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* 1680 - 169f
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* Runic
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* 16a0 - 16ff
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* Khmer
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* 1780 - 17ff
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* Mongolian
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* 1800 - 18af
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* Misc - superscripts and subscripts
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* 2070 - 209f
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* Misc - Combining Diacritical Marks for Symbols
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* 20d0 - 20ff
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* Misc - Arrows
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* 2190 - 21ff
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* Misc - Mathematical Operators
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* 2200 - 22ff
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* Misc - Miscellaneous Technical
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* 2300 - 23ff
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* Misc - Control picture
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* 2400 - 243f
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* Misc - Optical character recognition
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* 2440 - 2450
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* Misc - Enclose Alphanumerics
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* 2460 - 24ff
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* Misc - Box Drawing
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* 2500 - 257f
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* Misc - Block Elements
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* 2580 - 259f
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* Misc - Geometric Shapes
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* 25a0 - 25ff
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* Misc - Miscellaneous Symbols
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* 2600 - 267f
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* Misc - Dingbats
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* 2700 - 27bf
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* Misc - Braille Patterns
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* 2800 - 28ff
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* Yi Syllables
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* a000 - a48f
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* Yi radicals
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* a490 - a4cf
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* Alphabetic Presentation Forms
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* fb00 - fb4f
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* Misc - Combining half Marks
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* fe20 - fe2f
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* Misc - small form variants
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* fe50 - fe6f
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* Misc - Specials
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* fff0 - ffff
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*********************************************************************/
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#define NUM_OF_SUBTABLES 10
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#define SUBTABLE_SIZE 16
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static const uint8_t gUnicodeSubrangeTable[NUM_OF_SUBTABLES][SUBTABLE_SIZE] =
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{
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{ // table for X---
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kRangeTableBase+1, //u0xxx
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kRangeTableBase+2, //u1xxx
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kRangeTableBase+3, //u2xxx
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kRangeSetCJK, //u3xxx
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kRangeSetCJK, //u4xxx
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kRangeSetCJK, //u5xxx
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kRangeSetCJK, //u6xxx
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kRangeSetCJK, //u7xxx
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kRangeSetCJK, //u8xxx
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kRangeSetCJK, //u9xxx
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kRangeTableBase+4, //uaxxx
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kRangeKorean, //ubxxx
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kRangeKorean, //ucxxx
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kRangeTableBase+5, //udxxx
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kRangePrivate, //uexxx
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kRangeTableBase+6 //ufxxx
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},
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{ //table for 0X--
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kRangeSetLatin, //u00xx
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kRangeSetLatin, //u01xx
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kRangeSetLatin, //u02xx
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kRangeGreek, //u03xx XXX 0300-036f is in fact kRangeCombiningDiacriticalMarks
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kRangeCyrillic, //u04xx
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kRangeTableBase+7, //u05xx, includes Cyrillic supplement, Hebrew, and Armenian
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kRangeArabic, //u06xx
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kRangeTertiaryTable, //u07xx
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kRangeUnassigned, //u08xx
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kRangeTertiaryTable, //u09xx
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kRangeTertiaryTable, //u0axx
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kRangeTertiaryTable, //u0bxx
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kRangeTertiaryTable, //u0cxx
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kRangeTertiaryTable, //u0dxx
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kRangeTertiaryTable, //u0exx
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kRangeTibetan //u0fxx
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},
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{ //table for 1x--
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kRangeTertiaryTable, //u10xx
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kRangeKorean, //u11xx
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kRangeEthiopic, //u12xx
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kRangeTertiaryTable, //u13xx
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kRangeCanadian, //u14xx
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kRangeCanadian, //u15xx
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kRangeTertiaryTable, //u16xx
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kRangeKhmer, //u17xx
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kRangeMongolian, //u18xx
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kRangeUnassigned, //u19xx
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kRangeUnassigned, //u1axx
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kRangeUnassigned, //u1bxx
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kRangeUnassigned, //u1cxx
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kRangeUnassigned, //u1dxx
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kRangeSetLatin, //u1exx
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kRangeGreek //u1fxx
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},
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{ //table for 2x--
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kRangeSetLatin, //u20xx
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kRangeSetLatin, //u21xx
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kRangeMathOperators, //u22xx
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kRangeMiscTechnical, //u23xx
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kRangeControlOpticalEnclose, //u24xx
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kRangeBoxBlockGeometrics, //u25xx
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kRangeMiscSymbols, //u26xx
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kRangeDingbats, //u27xx
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kRangeBraillePattern, //u28xx
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kRangeUnassigned, //u29xx
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kRangeUnassigned, //u2axx
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kRangeUnassigned, //u2bxx
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kRangeUnassigned, //u2cxx
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kRangeUnassigned, //u2dxx
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kRangeSetCJK, //u2exx
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kRangeSetCJK //u2fxx
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},
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{ //table for ax--
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kRangeYi, //ua0xx
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kRangeYi, //ua1xx
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kRangeYi, //ua2xx
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kRangeYi, //ua3xx
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kRangeYi, //ua4xx
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kRangeUnassigned, //ua5xx
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kRangeUnassigned, //ua6xx
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kRangeUnassigned, //ua7xx
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kRangeUnassigned, //ua8xx
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kRangeUnassigned, //ua9xx
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kRangeUnassigned, //uaaxx
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kRangeUnassigned, //uabxx
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kRangeKorean, //uacxx
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kRangeKorean, //uadxx
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kRangeKorean, //uaexx
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kRangeKorean //uafxx
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},
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{ //table for dx--
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kRangeKorean, //ud0xx
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kRangeKorean, //ud1xx
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kRangeKorean, //ud2xx
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kRangeKorean, //ud3xx
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kRangeKorean, //ud4xx
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kRangeKorean, //ud5xx
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kRangeKorean, //ud6xx
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kRangeKorean, //ud7xx
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kRangeSurrogate, //ud8xx
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kRangeSurrogate, //ud9xx
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kRangeSurrogate, //udaxx
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kRangeSurrogate, //udbxx
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kRangeSurrogate, //udcxx
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kRangeSurrogate, //uddxx
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kRangeSurrogate, //udexx
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kRangeSurrogate //udfxx
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},
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{ // table for fx--
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kRangePrivate, //uf0xx
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kRangePrivate, //uf1xx
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kRangePrivate, //uf2xx
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kRangePrivate, //uf3xx
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kRangePrivate, //uf4xx
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kRangePrivate, //uf5xx
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kRangePrivate, //uf6xx
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kRangePrivate, //uf7xx
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kRangePrivate, //uf8xx
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kRangeSetCJK, //uf9xx
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kRangeSetCJK, //ufaxx
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kRangeArabic, //ufbxx, includes alphabic presentation form
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kRangeArabic, //ufcxx
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kRangeArabic, //ufdxx
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kRangeTableBase+8, //ufexx
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kRangeTableBase+9 //uffxx, halfwidth and fullwidth forms, includes Specials
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},
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{ //table for 0x0500 - 0x05ff
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kRangeCyrillic, //u050x
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kRangeCyrillic, //u051x
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kRangeCyrillic, //u052x
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kRangeArmenian, //u053x
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kRangeArmenian, //u054x
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kRangeArmenian, //u055x
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kRangeArmenian, //u056x
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kRangeArmenian, //u057x
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kRangeArmenian, //u058x
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kRangeHebrew, //u059x
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kRangeHebrew, //u05ax
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kRangeHebrew, //u05bx
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kRangeHebrew, //u05cx
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kRangeHebrew, //u05dx
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kRangeHebrew, //u05ex
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kRangeHebrew //u05fx
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},
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{ //table for 0xfe00 - 0xfeff
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kRangeSetCJK, //ufe0x
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kRangeSetCJK, //ufe1x
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kRangeSetCJK, //ufe2x
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kRangeSetCJK, //ufe3x
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kRangeSetCJK, //ufe4x
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kRangeSetCJK, //ufe5x
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kRangeSetCJK, //ufe6x
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kRangeArabic, //ufe7x
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kRangeArabic, //ufe8x
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kRangeArabic, //ufe9x
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kRangeArabic, //ufeax
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kRangeArabic, //ufebx
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kRangeArabic, //ufecx
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kRangeArabic, //ufedx
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kRangeArabic, //ufeex
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kRangeArabic //ufefx
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},
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{ //table for 0xff00 - 0xffff
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kRangeSetCJK, //uff0x, fullwidth latin
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kRangeSetCJK, //uff1x, fullwidth latin
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kRangeSetCJK, //uff2x, fullwidth latin
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kRangeSetCJK, //uff3x, fullwidth latin
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kRangeSetCJK, //uff4x, fullwidth latin
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kRangeSetCJK, //uff5x, fullwidth latin
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kRangeSetCJK, //uff6x, halfwidth katakana
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kRangeSetCJK, //uff7x, halfwidth katakana
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kRangeSetCJK, //uff8x, halfwidth katakana
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kRangeSetCJK, //uff9x, halfwidth katakana
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kRangeSetCJK, //uffax, halfwidth hangul jamo
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kRangeSetCJK, //uffbx, halfwidth hangul jamo
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kRangeSetCJK, //uffcx, halfwidth hangul jamo
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kRangeSetCJK, //uffdx, halfwidth hangul jamo
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kRangeSetCJK, //uffex, fullwidth symbols
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kRangeSpecials, //ufffx, Specials
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},
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};
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// Most scripts between U+0700 and U+16FF are assigned a chunk of 128 (0x80)
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// code points so that the number of entries in the tertiary range
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// table for that range is obtained by dividing (0x1700 - 0x0700) by 128.
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// Exceptions: Ethiopic, Tibetan, Hangul Jamo and Canadian aboriginal
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// syllabaries take multiple chunks and Ogham and Runic share a single chunk.
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#define TERTIARY_TABLE_SIZE ((0x1700 - 0x0700) / 0x80)
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static const uint8_t gUnicodeTertiaryRangeTable[TERTIARY_TABLE_SIZE] =
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{ //table for 0x0700 - 0x1600
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kRangeSyriac, //u070x
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kRangeThaana, //u078x
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kRangeUnassigned, //u080x place holder(resolved in the 2ndary tab.)
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kRangeUnassigned, //u088x place holder(resolved in the 2ndary tab.)
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kRangeDevanagari, //u090x
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kRangeBengali, //u098x
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kRangeGurmukhi, //u0a0x
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kRangeGujarati, //u0a8x
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kRangeOriya, //u0b0x
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kRangeTamil, //u0b8x
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kRangeTelugu, //u0c0x
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kRangeKannada, //u0c8x
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kRangeMalayalam, //u0d0x
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kRangeSinhala, //u0d8x
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kRangeThai, //u0e0x
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kRangeLao, //u0e8x
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kRangeTibetan, //u0f0x place holder(resolved in the 2ndary tab.)
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kRangeTibetan, //u0f8x place holder(resolved in the 2ndary tab.)
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kRangeMyanmar, //u100x
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kRangeGeorgian, //u108x
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kRangeKorean, //u110x place holder(resolved in the 2ndary tab.)
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kRangeKorean, //u118x place holder(resolved in the 2ndary tab.)
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kRangeEthiopic, //u120x place holder(resolved in the 2ndary tab.)
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kRangeEthiopic, //u128x place holder(resolved in the 2ndary tab.)
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kRangeEthiopic, //u130x
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kRangeCherokee, //u138x
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kRangeCanadian, //u140x place holder(resolved in the 2ndary tab.)
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kRangeCanadian, //u148x place holder(resolved in the 2ndary tab.)
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kRangeCanadian, //u150x place holder(resolved in the 2ndary tab.)
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kRangeCanadian, //u158x place holder(resolved in the 2ndary tab.)
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kRangeCanadian, //u160x
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kRangeOghamRunic //u168x this contains two scripts, Ogham & Runic
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};
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// A two level index is almost enough for locating a range, with the
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// exception of u03xx and u05xx. Since we don't really care about range for
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// combining diacritical marks in our font application, they are
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// not discriminated further. But future adoption of this module for other use
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// should be aware of this limitation. The implementation can be extended if
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// there is such a need.
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// For Indic, Southeast Asian scripts and some other scripts between
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// U+0700 and U+16FF, it's extended to the third level.
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uint32_t FindCharUnicodeRange(uint32_t ch)
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{
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uint32_t range;
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// aggregate ranges for non-BMP codepoints
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if (ch > 0xFFFF) {
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uint32_t p = (ch >> 16);
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if (p == 1) {
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return kRangeSMP;
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} else if (p == 2) {
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return kRangeSetCJK;
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}
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return kRangeHigherPlanes;
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}
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// lookup explicit range for BMP codepoints
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// first general range
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range = gUnicodeSubrangeTable[0][ch >> 12];
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// if general range is good enough, return that
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if (range < kRangeTableBase)
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// we try to get a specific range
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return range;
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// otherwise, use subrange tables
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range = gUnicodeSubrangeTable[range - kRangeTableBase][(ch & 0x0f00) >> 8];
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if (range < kRangeTableBase)
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return range;
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if (range < kRangeTertiaryTable)
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return gUnicodeSubrangeTable[range - kRangeTableBase][(ch & 0x00f0) >> 4];
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// Yet another table to look at : U+0700 - U+16FF : 128 code point blocks
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return gUnicodeTertiaryRangeTable[(ch - 0x0700) >> 7];
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}
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