fixed some potential issues with MAC addresses

added corresponding test-cases
switched to newer version of tinyxml due to some issues
adjusted affected code-parts accordingly
for better re-use, moved ceiling-calculation to a new class
some minor fixes
new helper methods
worked on wifi-opt

floorplan/v2/FloorplanHelper.h

@@ -7,11 +7,28 @@
 
 #include "Floorplan.h"
 
+#include "../../sensors/MACAddress.h"
+
 /**
  * helper methods for the floorplan
  */
 class FloorplanHelper {
 
+public:
+
+
+	/** get the AP for the given MAC [if available] */
+	static std::pair<Floorplan::AccessPoint*, Floorplan::Floor*> getAP(const Floorplan::IndoorMap* map, const MACAddress& mac) {
+		for (Floorplan::Floor* f : map->floors) {
+			for (Floorplan::AccessPoint* ap : f->accesspoints) {
+				if (MACAddress(ap->mac) == mac) {
+					return std::make_pair(ap, f);
+				}
+			}
+		}
+		return std::make_pair(nullptr, nullptr);
+	}
+
 public:
 
 	/** align all floorplan values to the given grid size. needed for the grid factory */