Add Packet::read_array_with.

src/proto/packet.rs

@@ -87,6 +87,18 @@ impl Packet {
         }
     }
 
+    pub fn read_array_with<T, F>(&mut self, read_item: F) -> io::Result<Vec<T>>
+        where F: Fn(&mut Self) -> io::Result<T>
+    {
+        let mut vector = Vec::new();
+        let num_items = try!(self.read_uint());
+        for _ in 0..num_items {
+            let item = try!(read_item(self));
+            vector.push(item);
+        }
+        Ok(vector)
+    }
+
     pub fn bytes_remaining(&self) -> usize {
         self.bytes.len() - self.cursor
     }