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codeql-action/node_modules/es-abstract/2020/AbstractRelationalComparison.js
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'use strict'; | |
var GetIntrinsic = require('get-intrinsic'); | |
var $Number = GetIntrinsic('%Number%'); | |
var $TypeError = GetIntrinsic('%TypeError%'); | |
var $isNaN = require('../helpers/isNaN'); | |
var IsStringPrefix = require('./IsStringPrefix'); | |
var StringToBigInt = require('./StringToBigInt'); | |
var ToNumeric = require('./ToNumeric'); | |
var ToPrimitive = require('./ToPrimitive'); | |
var Type = require('./Type'); | |
var BigIntLessThan = require('./BigInt/lessThan'); | |
var NumberLessThan = require('./Number/lessThan'); | |
// https://262.ecma-international.org/9.0/#sec-abstract-relational-comparison | |
// eslint-disable-next-line max-statements, max-lines-per-function | |
module.exports = function AbstractRelationalComparison(x, y, LeftFirst) { | |
if (Type(LeftFirst) !== 'Boolean') { | |
throw new $TypeError('Assertion failed: LeftFirst argument must be a Boolean'); | |
} | |
var px; | |
var py; | |
if (LeftFirst) { | |
px = ToPrimitive(x, $Number); | |
py = ToPrimitive(y, $Number); | |
} else { | |
py = ToPrimitive(y, $Number); | |
px = ToPrimitive(x, $Number); | |
} | |
if (Type(px) === 'String' && Type(py) === 'String') { | |
if (IsStringPrefix(py, px)) { | |
return false; | |
} | |
if (IsStringPrefix(px, py)) { | |
return true; | |
} | |
return px < py; // both strings, neither a prefix of the other. shortcut for steps 3 c-f | |
} | |
var pxType = Type(px); | |
var pyType = Type(py); | |
var nx; | |
var ny; | |
if (pxType === 'BigInt' && pyType === 'String') { | |
ny = StringToBigInt(py); | |
if ($isNaN(ny)) { | |
return void undefined; | |
} | |
return BigIntLessThan(px, ny); | |
} | |
if (pxType === 'String' && pyType === 'BigInt') { | |
nx = StringToBigInt(px); | |
if ($isNaN(nx)) { | |
return void undefined; | |
} | |
return BigIntLessThan(nx, py); | |
} | |
nx = ToNumeric(px); | |
ny = ToNumeric(py); | |
var nxType = Type(nx); | |
if (nxType === Type(ny)) { | |
return nxType === 'Number' ? NumberLessThan(nx, ny) : BigIntLessThan(nx, ny); | |
} | |
if ($isNaN(nx) || $isNaN(ny)) { | |
return void undefined; | |
} | |
if (nx === -Infinity || ny === Infinity) { | |
return true; | |
} | |
if (nx === Infinity || ny === -Infinity) { | |
return false; | |
} | |
return nx < ny; // by now, these are both nonzero, finite, and not equal | |
}; |