worked on wifi-scanner for linux

new time-grouping for vap grouper
adjusted test-cases
minor changes/fixes/improvements

data/Timestamp.h

@@ -21,6 +21,7 @@ public:
 	/** empty ctor */
 	explicit Timestamp() : _ms(0) {;}
 
+
 	/** get timestamp from the given value which represents milliesconds */
 	static inline Timestamp fromMS(const int64_t ms)	{return Timestamp(ms);}
 
@@ -75,11 +76,14 @@ public:
 
 
 	Timestamp operator - (const Timestamp& o) const {return Timestamp(_ms - o._ms);}
+	Timestamp& operator -= (const Timestamp& o) {_ms += o._ms; return *this;}
 
 	Timestamp operator + (const Timestamp& o) const {return Timestamp(_ms + o._ms);}
+	Timestamp& operator += (const Timestamp& o) {_ms += o._ms; return *this;}
 
-	Timestamp operator * (const float val) const {return Timestamp(_ms * val);}
+	template <typename T> Timestamp operator * (const T val) const {return Timestamp(_ms * val);}
 
+	template <typename T> Timestamp operator / (const T val) const {return Timestamp(_ms / val);}
 
 //	/** cast to float */
 //	operator float () const {return sec();}
@@ -87,4 +91,22 @@ public:
 
 };
 
+namespace std {
+	template<> class numeric_limits<Timestamp> {
+	public:
+		static Timestamp min() {
+			const int64_t minVal = std::numeric_limits<int64_t>::min();
+			return Timestamp::fromMS(minVal);
+		}
+		static Timestamp lowest() {
+			const int64_t minVal = std::numeric_limits<int64_t>::min();
+			return Timestamp::fromMS(minVal);
+		}
+		static Timestamp max() {
+			const int64_t maxVal = std::numeric_limits<int64_t>::max();
+			return Timestamp::fromMS(maxVal);
+		}
+	};
+}
+
 #endif // TIMESTAMP_H