PPT-MCP

'use strict'; var CodePointAt = require('./CodePointAt'); var $TypeError = require('es-errors/type'); var isInteger = require('math-intrinsics/isInteger'); var MAX_SAFE_INTEGER = require('math-intrinsics/constants/maxSafeInteger'); // https://262.ecma-international.org/12.0/#sec-advancestringindex module.exports = function AdvanceStringIndex(S, index, unicode) { if (typeof S !== 'string') { throw new $TypeError('Assertion failed: `S` must be a String'); } if (!isInteger(index) || index < 0 || index > MAX_SAFE_INTEGER) { throw new $TypeError('Assertion failed: `length` must be an integer >= 0 and <= 2**53'); } if (typeof unicode !== 'boolean') { throw new $TypeError('Assertion failed: `unicode` must be a Boolean'); } if (!unicode) { return index + 1; } var length = S.length; if ((index + 1) >= length) { return index + 1; } var cp = CodePointAt(S, index); return index + cp['[[CodeUnitCount]]']; };