(function (exports) {
'use strict';


// NS name for the supplied domain. May be label, pointer or any combination

exports.DNS_PACKER_TYPE_NS = function (ab, dv, total, record) {
  if(!record.data){
      throw new Error("no data on NS record");
  }
  

  var nsLen = 0;
  var rdLenIndex = total;
  total +=2;

  // RDATA 
  // a sequence of labels
  record.data.split('.').forEach(function(label) {
      nsLen += 1 + label.length;
      
      dv.setUint8(total, label.length, false);
      total += 1;

      label.split('').forEach(function (ch){
          dv.setUint8(total, ch.charCodeAt(0), false);
          total += 1;
      });
  });

  // RDLENGTH
  dv.setUint16(rdLenIndex, record.data.length + 1, false);


  return total;
};

}('undefined' !== typeof window ? window : exports));