decode msgpack-based bert

lib/bert/decode.rb

@@ -12,6 +12,8 @@ module BERT
       io.set_encoding('binary') if io.respond_to?(:set_encoding)
       header = io.getbyte
       case header
+      when VERSION_3
+        V3.new(io).read_any
       when MAGIC, VERSION_2
         new(io).read_any
       else
@@ -19,6 +21,16 @@ module BERT
       end
     end
 
+    class V3
+      def initialize(ins)
+        @unpacker = MessagePack::Unpacker.new(ins)
+      end
+
+      def read_any
+        @unpacker.read
+      end
+    end
+
     def initialize(ins)
       @in = ins
       @peeked = ""