serenity/AK/Time.h

#pragma once

namespace AK {

template<typename TimevalType>
inline void timeval_sub(const TimevalType& a, const TimevalType& b, TimevalType& result)
{
    result.tv_sec = a.tv_sec - b.tv_sec;
    result.tv_usec = a.tv_usec - b.tv_usec;
    if (result.tv_usec < 0) {
        --result.tv_sec;
        result.tv_usec += 1000000;
    }
}

template<typename TimevalType>
inline void timeval_add(const TimevalType& a, const TimevalType& b, TimevalType& result)
{
    result.tv_sec = a.tv_sec + b.tv_sec;
    result.tv_usec = a.tv_usec + b.tv_usec;
    if (result.tv_usec > 1000000) {
        ++result.tv_sec;
        result.tv_usec -= 1000000;
    }
}

}

using AK::timeval_add;
using AK::timeval_sub;