finished PTR parser

dns.type.ptr.js

@@ -10,8 +10,9 @@
 // ame ttl  class   rr     name
 // 15         IN     PTR    www.example.com.
 
-exports.DNS_TYPE_PTR = function (rdata) {
-
+var unpackLabels = exports.DNS_UNPACK_LABELS || require('./dns.unpack-labels.js').DNS_UNPACK_LABELS;
+exports.DNS_TYPE_PTR = function (ab, pack, record) {
 
+      return unpackLabels(new Uint8Array(ab), record.rdstart, { byteLength: 0, cpcount: 0, labels: [], name: '' }).name;
 };
 }('undefined' !== typeof window ? window : exports));