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codeql-action/node_modules/es-abstract/2019/ToNumber.js
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'use strict'; | |
var GetIntrinsic = require('../GetIntrinsic'); | |
var $TypeError = GetIntrinsic('%TypeError%'); | |
var $Number = GetIntrinsic('%Number%'); | |
var $RegExp = GetIntrinsic('%RegExp%'); | |
var $parseInteger = GetIntrinsic('%parseInt%'); | |
var callBound = require('../helpers/callBound'); | |
var regexTester = require('../helpers/regexTester'); | |
var isPrimitive = require('../helpers/isPrimitive'); | |
var $strSlice = callBound('String.prototype.slice'); | |
var isBinary = regexTester(/^0b[01]+$/i); | |
var isOctal = regexTester(/^0o[0-7]+$/i); | |
var isInvalidHexLiteral = regexTester(/^[-+]0x[0-9a-f]+$/i); | |
var nonWS = ['\u0085', '\u200b', '\ufffe'].join(''); | |
var nonWSregex = new $RegExp('[' + nonWS + ']', 'g'); | |
var hasNonWS = regexTester(nonWSregex); | |
// whitespace from: https://es5.github.io/#x15.5.4.20 | |
// implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324 | |
var ws = [ | |
'\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003', | |
'\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028', | |
'\u2029\uFEFF' | |
].join(''); | |
var trimRegex = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g'); | |
var $replace = callBound('String.prototype.replace'); | |
var $trim = function (value) { | |
return $replace(value, trimRegex, ''); | |
}; | |
var ToPrimitive = require('./ToPrimitive'); | |
// https://www.ecma-international.org/ecma-262/6.0/#sec-tonumber | |
module.exports = function ToNumber(argument) { | |
var value = isPrimitive(argument) ? argument : ToPrimitive(argument, $Number); | |
if (typeof value === 'symbol') { | |
throw new $TypeError('Cannot convert a Symbol value to a number'); | |
} | |
if (typeof value === 'string') { | |
if (isBinary(value)) { | |
return ToNumber($parseInteger($strSlice(value, 2), 2)); | |
} else if (isOctal(value)) { | |
return ToNumber($parseInteger($strSlice(value, 2), 8)); | |
} else if (hasNonWS(value) || isInvalidHexLiteral(value)) { | |
return NaN; | |
} else { | |
var trimmed = $trim(value); | |
if (trimmed !== value) { | |
return ToNumber(trimmed); | |
} | |
} | |
} | |
return $Number(value); | |
}; |