allow devices to be sorted by startaddress

protocol/esta/dmx/device.cpp

@@ -114,4 +114,19 @@ bool Device::setAddress(uint16_t start)
   return true;
 }
 
+
+/**
+ * @brief Device::operator <
+ * @param other
+ * @return
+ *
+ * Allow Devices to be members of sorted STL containers.
+ */
+bool Device::operator< (const Device &other ) const
+{
+  if (startAddress_ == other.startAddress_)
+    return footprint() < other.footprint();
+  return startAddress_ < other.startAddress_;
+}
+
 } // namespace DMX

protocol/esta/dmx/device.h

@@ -47,6 +47,8 @@ public:
   virtual void setPersonality(uint8_t mode);
   virtual bool setAddress(uint16_t start);
 
+  bool operator< (const Device &other) const;
+
 protected:
   std::vector<Personality*> personalities_; //!< available personalities
   uint8_t  personality_;                    //!< index of current personality