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110 lines
2.4 KiB
110 lines
2.4 KiB
3 years ago
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'use strict';
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const UNDEFINED_CODE_POINTS = [
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0xfffe,
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0xffff,
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0x1fffe,
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0x1ffff,
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0x2fffe,
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0x2ffff,
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0x3fffe,
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0x3ffff,
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0x4fffe,
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0x4ffff,
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0x5fffe,
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0x5ffff,
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0x6fffe,
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0x6ffff,
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0x7fffe,
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0x7ffff,
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0x8fffe,
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0x8ffff,
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0x9fffe,
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0x9ffff,
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0xafffe,
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0xaffff,
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0xbfffe,
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0xbffff,
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0xcfffe,
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0xcffff,
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0xdfffe,
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0xdffff,
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0xefffe,
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0xeffff,
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0xffffe,
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0xfffff,
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0x10fffe,
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0x10ffff
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];
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exports.REPLACEMENT_CHARACTER = '\uFFFD';
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exports.CODE_POINTS = {
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EOF: -1,
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NULL: 0x00,
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TABULATION: 0x09,
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CARRIAGE_RETURN: 0x0d,
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LINE_FEED: 0x0a,
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FORM_FEED: 0x0c,
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SPACE: 0x20,
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EXCLAMATION_MARK: 0x21,
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QUOTATION_MARK: 0x22,
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NUMBER_SIGN: 0x23,
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AMPERSAND: 0x26,
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APOSTROPHE: 0x27,
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HYPHEN_MINUS: 0x2d,
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SOLIDUS: 0x2f,
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DIGIT_0: 0x30,
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DIGIT_9: 0x39,
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SEMICOLON: 0x3b,
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LESS_THAN_SIGN: 0x3c,
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EQUALS_SIGN: 0x3d,
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GREATER_THAN_SIGN: 0x3e,
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QUESTION_MARK: 0x3f,
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LATIN_CAPITAL_A: 0x41,
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LATIN_CAPITAL_F: 0x46,
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LATIN_CAPITAL_X: 0x58,
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LATIN_CAPITAL_Z: 0x5a,
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RIGHT_SQUARE_BRACKET: 0x5d,
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GRAVE_ACCENT: 0x60,
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LATIN_SMALL_A: 0x61,
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LATIN_SMALL_F: 0x66,
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LATIN_SMALL_X: 0x78,
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LATIN_SMALL_Z: 0x7a,
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REPLACEMENT_CHARACTER: 0xfffd
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};
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exports.CODE_POINT_SEQUENCES = {
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DASH_DASH_STRING: [0x2d, 0x2d], //--
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DOCTYPE_STRING: [0x44, 0x4f, 0x43, 0x54, 0x59, 0x50, 0x45], //DOCTYPE
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CDATA_START_STRING: [0x5b, 0x43, 0x44, 0x41, 0x54, 0x41, 0x5b], //[CDATA[
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SCRIPT_STRING: [0x73, 0x63, 0x72, 0x69, 0x70, 0x74], //script
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PUBLIC_STRING: [0x50, 0x55, 0x42, 0x4c, 0x49, 0x43], //PUBLIC
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SYSTEM_STRING: [0x53, 0x59, 0x53, 0x54, 0x45, 0x4d] //SYSTEM
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};
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//Surrogates
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exports.isSurrogate = function(cp) {
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return cp >= 0xd800 && cp <= 0xdfff;
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};
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exports.isSurrogatePair = function(cp) {
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return cp >= 0xdc00 && cp <= 0xdfff;
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};
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exports.getSurrogatePairCodePoint = function(cp1, cp2) {
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return (cp1 - 0xd800) * 0x400 + 0x2400 + cp2;
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};
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//NOTE: excluding NULL and ASCII whitespace
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exports.isControlCodePoint = function(cp) {
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return (
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(cp !== 0x20 && cp !== 0x0a && cp !== 0x0d && cp !== 0x09 && cp !== 0x0c && cp >= 0x01 && cp <= 0x1f) ||
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(cp >= 0x7f && cp <= 0x9f)
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);
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};
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exports.isUndefinedCodePoint = function(cp) {
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return (cp >= 0xfdd0 && cp <= 0xfdef) || UNDEFINED_CODE_POINTS.indexOf(cp) > -1;
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};
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