source: imaps-frontend/node_modules/es-abstract/2017/SplitMatch.js@ 79a0317

'use strict';

var callBound = require('call-bound');

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

var $charAt = callBound('String.prototype.charAt');

// https://262.ecma-international.org/6.0/#sec-splitmatch

module.exports = function SplitMatch(S, q, R) {
        if (typeof S !== 'string') {
                throw new $TypeError('Assertion failed: `S` must be a String');
        }
        if (!isInteger(q)) {
                throw new $TypeError('Assertion failed: `q` must be an integer');
        }
        if (typeof R !== 'string') {
                throw new $TypeError('Assertion failed: `R` must be a String');
        }
        var r = R.length;
        var s = S.length;
        if (q + r > s) {
                return false;
        }

        for (var i = 0; i < r; i += 1) {
                if ($charAt(S, q + i) !== $charAt(R, i)) {
                        return false;
                }
        }

        return q + r;
};