'use strict'; var _ = require('lodash'); // Taken from the punycode library function ucs2encode(array) { return _.map(array, function (value) { var output = ''; if (value > 0xFFFF) { value -= 0x10000; output += String.fromCharCode(value >>> 10 & 0x3FF | 0xD800); value = 0xDC00 | value & 0x3FF; } output += String.fromCharCode(value); return output; }).join(''); } function ucs2decode(string) { var output = [], counter = 0, length = string.length, value, extra; while (counter < length) { value = string.charCodeAt(counter++); if (value >= 0xD800 && value <= 0xDBFF && counter < length) { // high surrogate, and there is a next character extra = string.charCodeAt(counter++); if ((extra & 0xFC00) === 0xDC00) { // low surrogate output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000); } else { // unmatched surrogate; only append this code unit, in case the next // code unit is the high surrogate of a surrogate pair output.push(value); counter--; } } else { output.push(value); } } return output; } module.exports = { encode: ucs2encode, decode: ucs2decode };