//
// Renato Mangini
// http://updates.html5rocks.com/2012/06/How-to-convert-ArrayBuffer-to-and-from-String
// http://stackoverflow.com/questions/6965107/converting-between-strings-and-arraybuffers
//

function ab2str(buf) {
    return String.fromCharCode.apply(null, new Uint16Array(buf));
}

function str2ab(str) {
    var buf = new ArrayBuffer(str.length*2); // 2 bytes for each char
    var bufView = new Uint16Array(buf);
    for (var i=0, strLen=str.length; i<strLen; i++) {
        bufView[i] = str.charCodeAt(i);
    }
    return buf;
}