AK: Add more time convenience functions and comparison operators

AK/Time.h

@@ -61,6 +61,17 @@ inline void timespec_sub(const TimespecType& a, const TimespecType& b, TimespecT
     }
 }
 
+template<typename TimespecType, typename TimevalType>
+inline void timespec_sub_timeval(const TimespecType& a, const TimevalType& b, TimespecType& result)
+{
+    result.tv_sec = a.tv_sec - b.tv_sec;
+    result.tv_nsec = a.tv_nsec - b.tv_usec * 1000;
+    if (result.tv_nsec < 0) {
+        --result.tv_sec;
+        result.tv_nsec += 1'000'000'000;
+    }
+}
+
 template<typename TimespecType>
 inline void timespec_add(const TimespecType& a, const TimespecType& b, TimespecType& result)
 {
@@ -72,6 +83,17 @@ inline void timespec_add(const TimespecType& a, const TimespecType& b, TimespecT
     }
 }
 
+template<typename TimespecType, typename TimevalType>
+inline void timespec_add_timeval(const TimespecType& a, const TimevalType& b, TimespecType& result)
+{
+    result.tv_sec = a.tv_sec + b.tv_sec;
+    result.tv_nsec = a.tv_nsec + b.tv_usec * 1000;
+    if (result.tv_nsec >= 1000'000'000) {
+        ++result.tv_sec;
+        result.tv_nsec -= 1000'000'000;
+    }
+}
+
 template<typename TimevalType, typename TimespecType>
 inline void timeval_to_timespec(const TimevalType& tv, TimespecType& ts)
 {
@@ -86,11 +108,55 @@ inline void timespec_to_timeval(const TimespecType& ts, TimevalType& tv)
     tv.tv_usec = ts.tv_nsec / 1000;
 }
 
+template<typename TimespecType>
+inline bool operator>=(const TimespecType& a, const TimespecType& b)
+{
+    return a.tv_sec > b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_nsec >= b.tv_nsec);
+}
+
+template<typename TimespecType>
+inline bool operator>(const TimespecType& a, const TimespecType& b)
+{
+    return a.tv_sec > b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_nsec > b.tv_nsec);
+}
+
+template<typename TimespecType>
+inline bool operator<(const TimespecType& a, const TimespecType& b)
+{
+    return a.tv_sec < b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_nsec < b.tv_nsec);
+}
+
+template<typename TimespecType>
+inline bool operator<=(const TimespecType& a, const TimespecType& b)
+{
+    return a.tv_sec < b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_nsec <= b.tv_nsec);
+}
+
+template<typename TimespecType>
+inline bool operator==(const TimespecType& a, const TimespecType& b)
+{
+    return a.tv_sec == b.tv_sec && a.tv_nsec == b.tv_nsec;
+}
+
+template<typename TimespecType>
+inline bool operator!=(const TimespecType& a, const TimespecType& b)
+{
+    return a.tv_sec != b.tv_sec || a.tv_nsec != b.tv_nsec;
+}
+
 }
 
 using AK::timespec_add;
+using AK::timespec_add_timeval;
 using AK::timespec_sub;
+using AK::timespec_sub_timeval;
 using AK::timespec_to_timeval;
 using AK::timeval_add;
 using AK::timeval_sub;
 using AK::timeval_to_timespec;
+using AK::operator<=;
+using AK::operator<;
+using AK::operator>;
+using AK::operator>=;
+using AK::operator==;
+using AK::operator!=;