Push up exploritory work

src/util.rs

@@ -0,0 +1,48 @@
+use std::fmt;
+use std::fmt::Display;
+
+pub fn as_u16(a: u8, b: u8) -> u16 {
+    (a as u16) << 8 | b as u16
+}
+
+pub struct Stats {
+    pub total_packets: usize,
+    pub known_packets: usize,
+    pub unknown_packets: usize,
+    pub errored_packets: usize,
+    pub empty_payload: usize,
+}
+
+impl Stats {
+    pub fn new() -> Stats {
+        Stats {
+            total_packets: 0,
+            known_packets: 0,
+            unknown_packets: 0,
+            errored_packets: 0,
+            empty_payload: 0,
+        }
+    }
+
+    fn percent_known(self) -> f64 {
+        self.total_packets as f64 / self.known_packets as f64
+    }
+
+    fn percent_error(self) -> f64 {
+        self.total_packets as f64 / self.errored_packets as f64
+    }
+}
+
+impl Display for Stats {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "Total: {}\nKnown: {}\nUnknown: {}\nErrored: {}\nEmpty: {}",
+            self.total_packets,
+            self.known_packets,
+            self.unknown_packets,
+            self.errored_packets,
+            self.empty_payload
+        )
+    }
+}