source: imaps-frontend/node_modules/es-abstract/2024/CompareArrayElements.js@ d565449

'use strict';

var $TypeError = require('es-errors/type');

var Call = require('./Call');
var IsLessThan = require('./IsLessThan');
var ToNumber = require('./ToNumber');
var ToString = require('./ToString');

var isNaN = require('../helpers/isNaN');

// https://262.ecma-international.org/14.0/#sec-comparearrayelements

module.exports = function CompareArrayElements(x, y, compareFn) {
        if (typeof compareFn !== 'function' && typeof compareFn !== 'undefined') {
                throw new $TypeError('Assertion failed: `compareFn` must be a function or undefined');
        }

        if (typeof x === 'undefined' && typeof y === 'undefined') {
                return 0; // step 1
        }

        if (typeof x === 'undefined') {
                return 1; // step 2
        }

        if (typeof y === 'undefined') {
                return -1; // step 3
        }

        if (typeof compareFn !== 'undefined') { // step 4
                var v = ToNumber(Call(compareFn, void undefined, [x, y])); // step 4.a
                if (isNaN(v)) {
                        return 0; // step 4.b
                }
                return v; // step 4.c
        }

        var xString = ToString(x); // step 5
        var yString = ToString(y); // step 6
        var xSmaller = IsLessThan(xString, yString, true); // step 7
        if (xSmaller) {
                return -1; // step 8
        }
        var ySmaller = IsLessThan(yString, xString, true); // step 9
        if (ySmaller) {
                return 1; // step 10
        }
        return 0; // step 11
};