/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsUnicodeRange.h"

/**********************************************************************

 * Unicode subranges as defined in unicode 3.0

 * x-western  -> latin

 *  0000 - 036f

 *  1e00 - 1eff

 *  2000 - 206f  (general punctuation)

 *  20a0 - 20cf  (currency symbols)

 *  2100 - 214f  (letterlike symbols)

 *  2150 - 218f  (Number Forms)

 * el         -> greek

 *  0370 - 03ff

 *  1f00 - 1fff

 * x-cyrillic -> cyrillic

 *  0400 - 04ff

 * he         -> hebrew

 *  0590 - 05ff

 * ar         -> arabic

 *  0600 - 06ff

 *  fb50 - fdff (arabic presentation forms)

 *  fe70 - feff (arabic presentation forms b)

 * th - thai

 *  0e00 - 0e7f

 * ko        -> korean

 *  ac00 - d7af  (hangul Syllables)

 *  1100 - 11ff    (jamo)

 *  3130 - 318f (hangul compatibility jamo)

 * ja

 *  3040 - 309f (hiragana)

 *  30a0 - 30ff (katakana)

 * zh-CN

 * zh-TW

 *

 * CJK

 *  3100 - 312f (bopomofo)

 *  31a0 - 31bf (bopomofo extended)

 *  3000 - 303f (CJK Symbols and Punctuation) 

 *  2e80 - 2eff (CJK radicals supplement)

 *  2f00 - 2fdf (Kangxi Radicals)

 *  2ff0 - 2fff (Ideographic Description Characters)

 *  3190 - 319f (kanbun)

 *  3200 - 32ff (Enclosed CJK letters and Months)

 *  3300 - 33ff (CJK compatibility)

 *  3400 - 4dbf (CJK Unified Ideographs Extension A)

 *  4e00 - 9faf (CJK Unified Ideographs)

 *  f900 - fa5f (CJK Compatibility Ideographs)

 *  fe30 - fe4f (CJK compatibility Forms)

 *  ff00 - ffef (halfwidth and fullwidth forms)

 *

 * Armenian

 *  0530 - 058f 

 * Sriac 

 *  0700 - 074f

 * Thaana

 *  0780 - 07bf

 * Devanagari

 *  0900 - 097f

 * Bengali

 *  0980 - 09ff

 * Gurmukhi

 *  0a00 - 0a7f

 * Gujarati

 *  0a80 - 0aff

 * Oriya

 *  0b00 - 0b7f

 * Tamil

 *  0b80 - 0bff

 * Telugu

 *  0c00 - 0c7f

 * Kannada

 *  0c80 - 0cff

 * Malayalam

 *  0d00 - 0d7f

 * Sinhala

 *  0d80 - 0def

 * Lao

 *  0e80 - 0eff

 * Tibetan

 *  0f00 - 0fbf

 * Myanmar

 *  1000 - 109f

 * Georgian

 *  10a0 - 10ff

 * Ethiopic

 *  1200 - 137f

 * Cherokee

 *  13a0 - 13ff

 * Canadian Aboriginal Syllabics

 *  1400 - 167f

 * Ogham

 *  1680 - 169f

 * Runic 

 *  16a0 - 16ff

 * Khmer

 *  1780 - 17ff

 * Mongolian

 *  1800 - 18af

 * Misc - superscripts and subscripts

 *  2070 - 209f

 * Misc - Combining Diacritical Marks for Symbols

 *  20d0 - 20ff

 * Misc - Arrows

 *  2190 - 21ff

 * Misc - Mathematical Operators

 *  2200 - 22ff

 * Misc - Miscellaneous Technical

 *  2300 - 23ff

 * Misc - Control picture

 *  2400 - 243f

 * Misc - Optical character recognition

 *  2440 - 2450

 * Misc - Enclose Alphanumerics

 *  2460 - 24ff

 * Misc - Box Drawing 

 *  2500 - 257f

 * Misc - Block Elements

 *  2580 - 259f

 * Misc - Geometric Shapes

 *  25a0 - 25ff

 * Misc - Miscellaneous Symbols

 *  2600 - 267f

 * Misc - Dingbats

 *  2700 - 27bf

 * Misc - Braille Patterns

 *  2800 - 28ff

 * Yi Syllables

 *  a000 - a48f

 * Yi radicals

 *  a490 - a4cf

 * Alphabetic Presentation Forms

 *  fb00 - fb4f

 * Misc - Combining half Marks

 *  fe20 - fe2f

 * Misc - small form variants

 *  fe50 - fe6f

 * Misc - Specials

 *  fff0 - ffff

 *********************************************************************/

#define NUM_OF_SUBTABLES      10

#define SUBTABLE_SIZE         16

static const uint8_t gUnicodeSubrangeTable[NUM_OF_SUBTABLES][SUBTABLE_SIZE] = 

{ 

  { // table for X---

    kRangeTableBase+1,  //u0xxx

    kRangeTableBase+2,  //u1xxx

    kRangeTableBase+3,  //u2xxx

    kRangeSetCJK,       //u3xxx

    kRangeSetCJK,       //u4xxx

    kRangeSetCJK,       //u5xxx

    kRangeSetCJK,       //u6xxx

    kRangeSetCJK,       //u7xxx

    kRangeSetCJK,       //u8xxx

    kRangeSetCJK,       //u9xxx

    kRangeTableBase+4,  //uaxxx

    kRangeKorean,       //ubxxx

    kRangeKorean,       //ucxxx

    kRangeTableBase+5,  //udxxx

    kRangePrivate,      //uexxx

    kRangeTableBase+6   //ufxxx

  },

  { //table for 0X--

    kRangeSetLatin,          //u00xx

    kRangeSetLatin,          //u01xx

    kRangeSetLatin,          //u02xx

    kRangeGreek,             //u03xx     XXX 0300-036f is in fact kRangeCombiningDiacriticalMarks

    kRangeCyrillic,          //u04xx

    kRangeTableBase+7,       //u05xx, includes Cyrillic supplement, Hebrew, and Armenian

    kRangeArabic,            //u06xx

    kRangeTertiaryTable,     //u07xx

    kRangeUnassigned,        //u08xx

    kRangeTertiaryTable,     //u09xx

    kRangeTertiaryTable,     //u0axx

    kRangeTertiaryTable,     //u0bxx

    kRangeTertiaryTable,     //u0cxx

    kRangeTertiaryTable,     //u0dxx

    kRangeTertiaryTable,     //u0exx

    kRangeTibetan            //u0fxx

  },

  { //table for 1x--

    kRangeTertiaryTable,     //u10xx

    kRangeKorean,            //u11xx

    kRangeEthiopic,          //u12xx

    kRangeTertiaryTable,     //u13xx

    kRangeCanadian,          //u14xx

    kRangeCanadian,          //u15xx

    kRangeTertiaryTable,     //u16xx

    kRangeKhmer,             //u17xx

    kRangeMongolian,         //u18xx

    kRangeUnassigned,        //u19xx

    kRangeUnassigned,        //u1axx

    kRangeUnassigned,        //u1bxx

    kRangeUnassigned,        //u1cxx

    kRangeUnassigned,        //u1dxx

    kRangeSetLatin,          //u1exx

    kRangeGreek              //u1fxx

  },

  { //table for 2x--

    kRangeSetLatin,          //u20xx

    kRangeSetLatin,          //u21xx

    kRangeMathOperators,     //u22xx

    kRangeMiscTechnical,     //u23xx

    kRangeControlOpticalEnclose, //u24xx

    kRangeBoxBlockGeometrics, //u25xx

    kRangeMiscSymbols,       //u26xx

    kRangeDingbats,          //u27xx

    kRangeBraillePattern,    //u28xx

    kRangeUnassigned,        //u29xx

    kRangeUnassigned,        //u2axx

    kRangeUnassigned,        //u2bxx

    kRangeUnassigned,        //u2cxx

    kRangeUnassigned,        //u2dxx

    kRangeSetCJK,            //u2exx

    kRangeSetCJK             //u2fxx

  },

  {  //table for ax--

    kRangeYi,                //ua0xx

    kRangeYi,                //ua1xx

    kRangeYi,                //ua2xx

    kRangeYi,                //ua3xx

    kRangeYi,                //ua4xx

    kRangeUnassigned,        //ua5xx

    kRangeUnassigned,        //ua6xx

    kRangeUnassigned,        //ua7xx

    kRangeUnassigned,        //ua8xx

    kRangeUnassigned,        //ua9xx

    kRangeUnassigned,        //uaaxx

    kRangeUnassigned,        //uabxx

    kRangeKorean,            //uacxx

    kRangeKorean,            //uadxx

    kRangeKorean,            //uaexx

    kRangeKorean             //uafxx

  },

  {  //table for dx--

    kRangeKorean,            //ud0xx

    kRangeKorean,            //ud1xx

    kRangeKorean,            //ud2xx

    kRangeKorean,            //ud3xx

    kRangeKorean,            //ud4xx

    kRangeKorean,            //ud5xx

    kRangeKorean,            //ud6xx

    kRangeKorean,            //ud7xx

    kRangeSurrogate,         //ud8xx

    kRangeSurrogate,         //ud9xx

    kRangeSurrogate,         //udaxx

    kRangeSurrogate,         //udbxx

    kRangeSurrogate,         //udcxx

    kRangeSurrogate,         //uddxx

    kRangeSurrogate,         //udexx

    kRangeSurrogate          //udfxx

  },

  { // table for fx--

    kRangePrivate,           //uf0xx 

    kRangePrivate,           //uf1xx 

    kRangePrivate,           //uf2xx 

    kRangePrivate,           //uf3xx 

    kRangePrivate,           //uf4xx 

    kRangePrivate,           //uf5xx 

    kRangePrivate,           //uf6xx 

    kRangePrivate,           //uf7xx 

    kRangePrivate,           //uf8xx 

    kRangeSetCJK,            //uf9xx 

    kRangeSetCJK,            //ufaxx 

    kRangeArabic,            //ufbxx, includes alphabic presentation form

    kRangeArabic,            //ufcxx

    kRangeArabic,            //ufdxx

    kRangeTableBase+8,       //ufexx

    kRangeTableBase+9        //uffxx, halfwidth and fullwidth forms, includes Specials

  },

  { //table for 0x0500 - 0x05ff

    kRangeCyrillic,          //u050x

    kRangeCyrillic,          //u051x

    kRangeCyrillic,          //u052x

    kRangeArmenian,          //u053x

    kRangeArmenian,          //u054x

    kRangeArmenian,          //u055x

    kRangeArmenian,          //u056x

    kRangeArmenian,          //u057x

    kRangeArmenian,          //u058x

    kRangeHebrew,            //u059x

    kRangeHebrew,            //u05ax

    kRangeHebrew,            //u05bx

    kRangeHebrew,            //u05cx

    kRangeHebrew,            //u05dx

    kRangeHebrew,            //u05ex

    kRangeHebrew             //u05fx

  },

  { //table for 0xfe00 - 0xfeff

    kRangeSetCJK,            //ufe0x

    kRangeSetCJK,            //ufe1x

    kRangeSetCJK,            //ufe2x

    kRangeSetCJK,            //ufe3x

    kRangeSetCJK,            //ufe4x

    kRangeSetCJK,            //ufe5x

    kRangeSetCJK,            //ufe6x

    kRangeArabic,            //ufe7x

    kRangeArabic,            //ufe8x

    kRangeArabic,            //ufe9x

    kRangeArabic,            //ufeax

    kRangeArabic,            //ufebx

    kRangeArabic,            //ufecx

    kRangeArabic,            //ufedx

    kRangeArabic,            //ufeex

    kRangeArabic             //ufefx

  },

  { //table for 0xff00 - 0xffff

    kRangeSetCJK,            //uff0x, fullwidth latin

    kRangeSetCJK,            //uff1x, fullwidth latin

    kRangeSetCJK,            //uff2x, fullwidth latin

    kRangeSetCJK,            //uff3x, fullwidth latin

    kRangeSetCJK,            //uff4x, fullwidth latin

    kRangeSetCJK,            //uff5x, fullwidth latin

    kRangeSetCJK,            //uff6x, halfwidth katakana

    kRangeSetCJK,            //uff7x, halfwidth katakana

    kRangeSetCJK,            //uff8x, halfwidth katakana

    kRangeSetCJK,            //uff9x, halfwidth katakana

    kRangeSetCJK,            //uffax, halfwidth hangul jamo

    kRangeSetCJK,            //uffbx, halfwidth hangul jamo

    kRangeSetCJK,            //uffcx, halfwidth hangul jamo

    kRangeSetCJK,            //uffdx, halfwidth hangul jamo

    kRangeSetCJK,            //uffex, fullwidth symbols

    kRangeSpecials,          //ufffx, Specials

  },

};

// Most scripts between U+0700 and U+16FF are assigned a chunk of 128 (0x80) 

// code points  so that the number of entries in the tertiary range

// table for that range is obtained by dividing (0x1700 - 0x0700) by 128.

// Exceptions: Ethiopic, Tibetan, Hangul Jamo and Canadian aboriginal 

// syllabaries take multiple chunks and Ogham and Runic share  a single chunk.

#define TERTIARY_TABLE_SIZE ((0x1700 - 0x0700) / 0x80)

static const uint8_t gUnicodeTertiaryRangeTable[TERTIARY_TABLE_SIZE] =

{ //table for 0x0700 - 0x1600 

    kRangeSyriac,            //u070x

    kRangeThaana,            //u078x

    kRangeUnassigned,        //u080x  place holder(resolved in the 2ndary tab.)

    kRangeUnassigned,        //u088x  place holder(resolved in the 2ndary tab.)

    kRangeDevanagari,        //u090x

    kRangeBengali,           //u098x

    kRangeGurmukhi,          //u0a0x

    kRangeGujarati,          //u0a8x

    kRangeOriya,             //u0b0x

    kRangeTamil,             //u0b8x

    kRangeTelugu,            //u0c0x

    kRangeKannada,           //u0c8x

    kRangeMalayalam,         //u0d0x

    kRangeSinhala,           //u0d8x

    kRangeThai,              //u0e0x  

    kRangeLao,               //u0e8x

    kRangeTibetan,           //u0f0x  place holder(resolved in the 2ndary tab.)

    kRangeTibetan,           //u0f8x  place holder(resolved in the 2ndary tab.)

    kRangeMyanmar,           //u100x

    kRangeGeorgian,          //u108x

    kRangeKorean,            //u110x  place holder(resolved in the 2ndary tab.)

    kRangeKorean,            //u118x  place holder(resolved in the 2ndary tab.)

    kRangeEthiopic,          //u120x  place holder(resolved in the 2ndary tab.)

    kRangeEthiopic,          //u128x  place holder(resolved in the 2ndary tab.)

    kRangeEthiopic,          //u130x  

    kRangeCherokee,          //u138x

    kRangeCanadian,          //u140x  place holder(resolved in the 2ndary tab.)

    kRangeCanadian,          //u148x  place holder(resolved in the 2ndary tab.)

    kRangeCanadian,          //u150x  place holder(resolved in the 2ndary tab.)

    kRangeCanadian,          //u158x  place holder(resolved in the 2ndary tab.)

    kRangeCanadian,          //u160x  

    kRangeOghamRunic         //u168x  this contains two scripts, Ogham & Runic

};

// A two level index is almost enough for locating a range, with the 

// exception of u03xx and u05xx. Since we don't really care about range for

// combining diacritical marks in our font application, they are 

// not discriminated further. But future adoption of this module for other use 

// should be aware of this limitation. The implementation can be extended if 

// there is such a need.

// For Indic, Southeast Asian scripts and some other scripts between

// U+0700 and U+16FF, it's extended to the third level.

uint32_t FindCharUnicodeRange(uint32_t ch)

{

  uint32_t range;

  // aggregate ranges for non-BMP codepoints

  if (ch > 0xFFFF) {

    uint32_t p = (ch >> 16);

    if (p == 1) {

        return kRangeSMP;

    } else if (p == 2) {

        return kRangeSetCJK;

    }

    return kRangeHigherPlanes;

  }

  // lookup explicit range for BMP codepoints

  // first general range

  range = gUnicodeSubrangeTable[0][ch >> 12];

  // if general range is good enough, return that

  if (range < kRangeTableBase)

    // we try to get a specific range 

    return range;

  // otherwise, use subrange tables

  range = gUnicodeSubrangeTable[range - kRangeTableBase][(ch & 0x0f00) >> 8];

  if (range < kRangeTableBase)

    return range;

  if (range < kRangeTertiaryTable)

    return gUnicodeSubrangeTable[range - kRangeTableBase][(ch & 0x00f0) >> 4];

  // Yet another table to look at : U+0700 - U+16FF : 128 code point blocks

  return gUnicodeTertiaryRangeTable[(ch - 0x0700) >> 7];

}