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code-range.js
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code-range.js
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const codeRanges = {
"Basic Latin": [0x0000, 0x007F],
"Latin-1 Supplement": [0x0080, 0x00FF],
"Latin Extended-A": [0x0100, 0x017F],
"Latin Extended-B": [0x0180, 0x024F],
"IPA Extensions": [0x0250, 0x02AF],
"Spacing Modifier Letters": [0x02B0, 0x02FF],
"Combining Diacritical Marks": [0x0300, 0x036F],
"Greek and Coptic": [0x0370, 0x03FF],
"Cyrillic": [0x0400, 0x04FF],
"Cyrillic Supplement": [0x0500, 0x052F],
"Armenian": [0x0530, 0x058F],
"Hebrew": [0x0590, 0x05FF],
"Arabic": [0x0600, 0x06FF],
"Syriac": [0x0700, 0x074F],
"Arabic Supplement": [0x0750, 0x077F],
"Thaana": [0x0780, 0x07BF],
"NKo": [0x07C0, 0x07FF],
"Samaritan": [0x0800, 0x083F],
"Mandaic": [0x0840, 0x085F],
"Arabic Extended-A": [0x08A0, 0x08FF],
"Devanagari": [0x0900, 0x097F],
"Bengali": [0x0980, 0x09FF],
"Gurmukhi": [0x0A00, 0x0A7F],
"Gujarati": [0x0A80, 0x0AFF],
"Oriya": [0x0B00, 0x0B7F],
"Tamil": [0x0B80, 0x0BFF],
"Telugu": [0x0C00, 0x0C7F],
"Kannada": [0x0C80, 0x0CFF],
"Malayalam": [0x0D00, 0x0D7F],
"Sinhala": [0x0D80, 0x0DFF],
"Thai": [0x0E00, 0x0E7F],
"Lao": [0x0E80, 0x0EFF],
"Tibetan": [0x0F00, 0x0FFF],
"Myanmar": [0x1000, 0x109F],
"Georgian": [0x10A0, 0x10FF],
"Hangul Jamo": [0x1100, 0x11FF],
"Ethiopic": [0x1200, 0x137F],
"Ethiopic Supplement": [0x1380, 0x139F],
"Cherokee": [0x13A0, 0x13FF],
"Unified Canadian Aboriginal Syllabics": [0x1400, 0x167F],
"Ogham": [0x1680, 0x169F],
"Runic": [0x16A0, 0x16FF],
"Tagalog": [0x1700, 0x171F],
"Hanunoo": [0x1720, 0x173F],
"Buhid": [0x1740, 0x175F],
"Tagbanwa": [0x1760, 0x177F],
"Khmer": [0x1780, 0x17FF],
"Mongolian": [0x1800, 0x18AF],
"Unified Canadian Aboriginal Syllabics Extended": [0x18B0, 0x18FF],
"Limbu": [0x1900, 0x194F],
"Tai Le": [0x1950, 0x197F],
"New Tai Lue": [0x1980, 0x19DF],
"Khmer Symbols": [0x19E0, 0x19FF],
"Buginese": [0x1A00, 0x1A1F],
"Tai Tham": [0x1A20, 0x1AAF],
"Combining Diacritical Marks Extended": [0x1AB0, 0x1AFF],
"Balinese": [0x1B00, 0x1B7F],
"Sundanese": [0x1B80, 0x1BBF],
"Batak": [0x1BC0, 0x1BFF],
"Lepcha": [0x1C00, 0x1C4F],
"Ol Chiki": [0x1C50, 0x1C7F],
"Sundanese Supplement": [0x1CC0, 0x1CCF],
"Vedic Extensions": [0x1CD0, 0x1CFF],
"Phonetic Extensions": [0x1D00, 0x1D7F],
"Phonetic Extensions Supplement": [0x1D80, 0x1DBF],
"Combining Diacritical Marks Supplement": [0x1DC0, 0x1DFF],
"Latin Extended Additional": [0x1E00, 0x1EFF],
"Greek Extended": [0x1F00, 0x1FFF],
"General Punctuation": [0x2000, 0x206F],
"Superscripts and Subscripts": [0x2070, 0x209F],
"Currency Symbols": [0x20A0, 0x20CF],
"Combining Diacritical Marks for Symbols": [0x20D0, 0x20FF],
"Letterlike Symbols": [0x2100, 0x214F],
"Number Forms": [0x2150, 0x218F],
"Arrows": [0x2190, 0x21FF],
"Mathematical Operators": [0x2200, 0x22FF],
"Miscellaneous Technical": [0x2300, 0x23FF],
"Control Pictures": [0x2400, 0x243F],
"Optical Character Recognition": [0x2440, 0x245F],
"Enclosed Alphanumerics": [0x2460, 0x24FF],
"Box Drawing": [0x2500, 0x257F],
"Block Elements": [0x2580, 0x259F],
"Geometric Shapes": [0x25A0, 0x25FF],
"Miscellaneous Symbols": [0x2600, 0x26FF],
"Dingbats": [0x2700, 0x27BF],
"Miscellaneous Mathematical Symbols-A": [0x27C0, 0x27EF],
"Supplemental Arrows-A": [0x27F0, 0x27FF],
"Braille Patterns": [0x2800, 0x28FF],
"Supplemental Arrows-B": [0x2900, 0x297F],
"Miscellaneous Mathematical Symbols-B": [0x2980, 0x29FF],
"Supplemental Mathematical Operators": [0x2A00, 0x2AFF],
"Miscellaneous Symbols and Arrows": [0x2B00, 0x2BFF],
"Glagolitic": [0x2C00, 0x2C5F],
"Latin Extended-C": [0x2C60, 0x2C7F],
"Coptic": [0x2C80, 0x2CFF],
"Georgian Supplement": [0x2D00, 0x2D2F],
"Tifinagh": [0x2D30, 0x2D7F],
"Ethiopic Extended": [0x2D80, 0x2DDF],
"Cyrillic Extended-A": [0x2DE0, 0x2DFF],
"Supplemental Punctuation": [0x2E00, 0x2E7F],
"CJK Radicals Supplement": [0x2E80, 0x2EFF],
"Kangxi Radicals": [0x2F00, 0x2FDF],
"Ideographic Description Characters": [0x2FF0, 0x2FFF],
"CJK Symbols and Punctuation": [0x3000, 0x303F],
"Hiragana": [0x3040, 0x309F],
"Katakana": [0x30A0, 0x30FF],
"Bopomofo": [0x3100, 0x312F],
"Hangul Compatibility Jamo": [0x3130, 0x318F],
"Kanbun": [0x3190, 0x319F],
"Bopomofo Extended": [0x31A0, 0x31BF],
"CJK Strokes": [0x31C0, 0x31EF],
"Katakana Phonetic Extensions": [0x31F0, 0x31FF],
"Enclosed CJK Letters and Months": [0x3200, 0x32FF],
"CJK Compatibility": [0x3300, 0x33FF],
"CJK Unified Ideographs Extension A": [0x3400, 0x4DBF],
"Yijing Hexagram Symbols": [0x4DC0, 0x4DFF],
"CJK Unified Ideographs": [0x4E00, 0x9FFF],
"Yi Syllables": [0xA000, 0xA48F],
"Yi Radicals": [0xA490, 0xA4CF],
"Lisu": [0xA4D0, 0xA4FF],
"Vai": [0xA500, 0xA63F],
"Cyrillic Extended-B": [0xA640, 0xA69F],
"Bamum": [0xA6A0, 0xA6FF],
"Modifier Tone Letters": [0xA700, 0xA71F],
"Latin Extended-D": [0xA720, 0xA7FF],
"Syloti Nagri": [0xA800, 0xA82F],
"Common Indic Number Forms": [0xA830, 0xA83F],
"Phags-pa": [0xA840, 0xA87F],
"Saurashtra": [0xA880, 0xA8DF],
"Devanagari Extended": [0xA8E0, 0xA8FF],
"Kayah Li": [0xA900, 0xA92F],
"Rejang": [0xA930, 0xA95F],
"Hangul Jamo Extended-A": [0xA960, 0xA97F],
"Javanese": [0xA980, 0xA9DF],
"Myanmar Extended-B": [0xA9E0, 0xA9FF],
"Cham": [0xAA00, 0xAA5F],
"Myanmar Extended-A": [0xAA60, 0xAA7F],
"Tai Viet": [0xAA80, 0xAADF],
"Meetei Mayek Extensions": [0xAAE0, 0xAAFF],
"Ethiopic Extended-A": [0xAB00, 0xAB2F],
"Latin Extended-E": [0xAB30, 0xAB6F],
"Cherokee Supplement": [0xAB70, 0xABBF],
"Meetei Mayek": [0xABC0, 0xABFF],
"Hangul Syllables": [0xAC00, 0xD7AF],
"Hangul Jamo Extended-B": [0xD7B0, 0xD7FF],
"High Surrogates": [0xD800, 0xDB7F],
"High Private Use Surrogates": [0xDB80, 0xDBFF],
"Low Surrogates": [0xDC00, 0xDFFF],
"Private Use Area": [0xE000, 0xF8FF],
"CJK Compatibility Ideographs": [0xF900, 0xFAFF],
"Alphabetic Presentation Forms": [0xFB00, 0xFB4F],
"Arabic Presentation Forms-A": [0xFB50, 0xFDFF],
"Variation Selectors": [0xFE00, 0xFE0F],
"Vertical Forms": [0xFE10, 0xFE1F],
"Combining Half Marks": [0xFE20, 0xFE2F],
"CJK Compatibility Forms": [0xFE30, 0xFE4F],
"Small Form Variants": [0xFE50, 0xFE6F],
"Arabic Presentation Forms-B": [0xFE70, 0xFEFF],
"Halfwidth and Fullwidth Forms": [0xFF00, 0xFFEF],
"Specials": [0xFFF0, 0xFFFF],
"Linear B Syllabary": [0x10000, 0x1007F],
"Linear B Ideograms": [0x10080, 0x100FF],
"Aegean Numbers": [0x10100, 0x1013F],
"Ancient Greek Numbers": [0x10140, 0x1018F],
"Ancient Symbols": [0x10190, 0x101CF],
"Phaistos Disc": [0x101D0, 0x101FF],
"Lycian": [0x10280, 0x1029F],
"Carian": [0x102A0, 0x102DF],
"Coptic Epact Numbers": [0x102E0, 0x102FF],
"Old Italic": [0x10300, 0x1032F],
"Gothic": [0x10330, 0x1034F],
"Old Permic": [0x10350, 0x1037F],
"Ugaritic": [0x10380, 0x1039F],
"Old Persian": [0x103A0, 0x103DF],
"Deseret": [0x10400, 0x1044F],
"Shavian": [0x10450, 0x1047F],
"Osmanya": [0x10480, 0x104AF],
"Elbasan": [0x10500, 0x1052F],
"Caucasian Albanian": [0x10530, 0x1056F],
"Linear A": [0x10600, 0x1077F],
"Cypriot Syllabary": [0x10800, 0x1083F],
"Imperial Aramaic": [0x10840, 0x1085F],
"Palmyrene": [0x10860, 0x1087F],
"Nabataean": [0x10880, 0x108AF],
"Hatran": [0x108E0, 0x108FF],
"Phoenician": [0x10900, 0x1091F],
"Lydian": [0x10920, 0x1093F],
"Meroitic Hieroglyphs": [0x10980, 0x1099F],
"Meroitic Cursive": [0x109A0, 0x109FF],
"Kharoshthi": [0x10A00, 0x10A5F],
"Old South Arabian": [0x10A60, 0x10A7F],
"Old North Arabian": [0x10A80, 0x10A9F],
"Manichaean": [0x10AC0, 0x10AFF],
"Avestan": [0x10B00, 0x10B3F],
"Inscriptional Parthian": [0x10B40, 0x10B5F],
"Inscriptional Pahlavi": [0x10B60, 0x10B7F],
"Psalter Pahlavi": [0x10B80, 0x10BAF],
"Old Turkic": [0x10C00, 0x10C4F],
"Old Hungarian": [0x10C80, 0x10CFF],
"Rumi Numeral Symbols": [0x10E60, 0x10E7F],
"Brahmi": [0x11000, 0x1107F],
"Kaithi": [0x11080, 0x110CF],
"Sora Sompeng": [0x110D0, 0x110FF],
"Chakma": [0x11100, 0x1114F],
"Mahajani": [0x11150, 0x1117F],
"Sharada": [0x11180, 0x111DF],
"Sinhala Archaic Numbers": [0x111E0, 0x111FF],
"Khojki": [0x11200, 0x1124F],
"Multani": [0x11280, 0x112AF],
"Khudawadi": [0x112B0, 0x112FF],
"Grantha": [0x11300, 0x1137F],
"Tirhuta": [0x11480, 0x114DF],
"Siddham": [0x11580, 0x115FF],
"Modi": [0x11600, 0x1165F],
"Takri": [0x11680, 0x116CF],
"Ahom": [0x11700, 0x1173F],
"Warang Citi": [0x118A0, 0x118FF],
"Pau Cin Hau": [0x11AC0, 0x11AFF],
"Cuneiform": [0x12000, 0x123FF],
"Cuneiform Numbers and Punctuation": [0x12400, 0x1247F],
"Early Dynastic Cuneiform": [0x12480, 0x1254F],
"Egyptian Hieroglyphs": [0x13000, 0x1342F],
"Anatolian Hieroglyphs": [0x14400, 0x1467F],
"Bamum Supplement": [0x16800, 0x16A3F],
"Mro": [0x16A40, 0x16A6F],
"Bassa Vah": [0x16AD0, 0x16AFF],
"Pahawh Hmong": [0x16B00, 0x16B8F],
"Miao": [0x16F00, 0x16F9F],
"Kana Supplement": [0x1B000, 0x1B0FF],
"Duployan": [0x1BC00, 0x1BC9F],
"Shorthand Format Controls": [0x1BCA0, 0x1BCAF],
"Byzantine Musical Symbols": [0x1D000, 0x1D0FF],
"Musical Symbols": [0x1D100, 0x1D1FF],
"Ancient Greek Musical Notation": [0x1D200, 0x1D24F],
"Tai Xuan Jing Symbols": [0x1D300, 0x1D35F],
"Counting Rod Numerals": [0x1D360, 0x1D37F],
"Mathematical Alphanumeric Symbols": [0x1D400, 0x1D7FF],
"Sutton SignWriting": [0x1D800, 0x1DAAF],
"Mende Kikakui": [0x1E800, 0x1E8DF],
"Arabic Mathematical Alphabetic Symbols": [0x1EE00, 0x1EEFF],
"Mahjong Tiles": [0x1F000, 0x1F02F],
"Domino Tiles": [0x1F030, 0x1F09F],
"Playing Cards": [0x1F0A0, 0x1F0FF],
"Enclosed Alphanumeric Supplement": [0x1F100, 0x1F1FF],
"Enclosed Ideographic Supplement": [0x1F200, 0x1F2FF],
"Miscellaneous Symbols and Pictographs": [0x1F300, 0x1F5FF],
"Emoticons": [0x1F600, 0x1F64F],
"Ornamental Dingbats": [0x1F650, 0x1F67F],
"Transport and Map Symbols": [0x1F680, 0x1F6FF],
"Alchemical Symbols": [0x1F700, 0x1F77F],
"Geometric Shapes Extended": [0x1F780, 0x1F7FF],
"Supplemental Arrows-C": [0x1F800, 0x1F8FF],
"Supplemental Symbols and Pictographs": [0x1F900, 0x1F9FF],
"CJK Unified Ideographs Extension B": [0x20000, 0x2A6DF],
"CJK Unified Ideographs Extension C": [0x2A700, 0x2B73F],
"CJK Unified Ideographs Extension D": [0x2B740, 0x2B81F],
"CJK Unified Ideographs Extension E": [0x2B820, 0x2CEAF],
"CJK Compatibility Ideographs Supplement": [0x2F800, 0x2FA1F],
"Tags": [0xE0000, 0xE007F],
"Variation Selectors Supplement": [0xE0100, 0xE01EF],
"Supplementary Private Use Area-A": [0xF0000, 0xFFFFF],
"Supplementary Private Use Area-B": [0x100000, 0x10FFFF]
};
Object.freeze(codeRanges);
/** Code range of a code range name
* @param { string } name Code range name
* @returns { [ number, number ] | undefined } */
function codeRange(name) {
return codeRanges[name];
}
const codeRangeIndex = [];
for (const rangeName in codeRanges) {
if ([ 'Tags', 'Variation Selectors Supplement',
'Supplementary Private Use Area-A', 'Supplementary Private Use Area-B' ]
.indexOf(rangeName) >= 0) continue;
const [lower, upper] = codeRanges[rangeName];
const lowerIndex = Math.floor(lower/0x100);
const upperIndex = Math.floor(upper/0x100);
for (let i = lowerIndex; i <= upperIndex; i++) {
if (codeRangeIndex[i] === undefined) codeRangeIndex[i] = {};
codeRangeIndex[i][rangeName] = codeRanges[rangeName];
}
}
/** Code range name of a unicode, return undefined if the corresponding range
* is undefined
* @param { number } unicode Character code in number
* @returns { string | undefined } */
function codeBlockName(unicode) {
if (unicode > 0x2FA1F) {
if (unicode >= 0xE0000 && unicode <= 0xE007F) return 'Tags';
if (unicode >= 0xE0100 && unicode <= 0xE01EF) return 'Variation Selectors Supplement';
if (unicode >= 0xF0000 && unicode <= 0xFFFFF) return 'Supplementary Private Use Area-A';
if (unicode >= 0x100000 && unicode <= 0x10FFFF) return 'Supplementary Private Use Area-B';
return undefined;
}
const candidates = codeRangeIndex[Math.floor(unicode/0x100)];
if (candidates === undefined) return undefined;
for (const name in candidates) {
const [ lower, upper ] = candidates[name];
if (unicode >= lower && unicode <= upper) return name;
}
return undefined;
}
/** Check if the code point is in the block
* @param { number } unicode Unicode
* @param { ...string } blocknames Names of the code blocks
* @returns { boolean } */
function codeInBlock(unicode, ...blocknames) {
if (blocknames.length === 0) return false;
const [ lower, upper ] = codeRange(blocknames[0]) || [ -1, -1 ];
return (unicode >= lower && unicode <= upper)
|| codeInBlock(unicode, ...blocknames.slice(1));
}
/** Check if the character code is a Han character
* @param { number } unicode
* @returns { boolean } */
function isHan(unicode) {
return codeInBlock(unicode, 'CJK Radicals Supplement')
|| codeInBlock(unicode, 'Kangxi Radicals')
|| codeInBlock(unicode, 'CJK Strokes')
|| codeInBlock(unicode, 'CJK Unified Ideographs Extension A')
|| codeInBlock(unicode, 'CJK Unified Ideographs')
|| codeInBlock(unicode, 'CJK Compatibility Ideographs')
|| codeInBlock(unicode, 'CJK Unified Ideographs Extension B')
|| codeInBlock(unicode, 'CJK Unified Ideographs Extension C')
|| codeInBlock(unicode, 'CJK Unified Ideographs Extension D')
|| codeInBlock(unicode, 'CJK Unified Ideographs Extension E');
}
/** Convert Unicode to UTF-16 encoding that JavaScript use for charcodes
* @param { number } unicode
* @return { number[] } */
function toUTF16(unicode) {
if (unicode >= 0x000000 && unicode <= 0x00ffff) return [ unicode ];
if (unicode <= 0x10ffff) {
const c = unicode - 0x10000;
const high = Math.floor(c/0x400) + 0xD800;
const low = c%0x400 + 0xDC00;
return [ high, low ];
}
throw Error(`Cannot convert ${unicode} to UTF-16`);
}
/** Convert UTF16 string to Unicode
* @param { string } str
* @returns { number } */
function fromUTF16String(str) {
if (!str) return NaN;
const high = str.charCodeAt(0);
if (Math.floor(high/0x400) !== 0x36) return high;
const low = str.charCodeAt(1);
return (high - 0xD800) * 0x400 + (low - 0xDC00) + 0x10000;
}
module.exports = {
codeBlockName,
codeInBlock,
codeRange,
isHan,
toUTF16,
fromUTF16String
}