//---------------------------------------------------------------------------//
//  1100101 |_ mov #0, r4         __                                         //
//     11   |_ <0xb380 %5c4>     / _|_ _____ ___                             //
//     0110 |_ 3.50 -> 3.60     |  _\ \ / _ (_-<                             //
//          |_ base# + offset   |_| /_\_\___/__/                             //
//---------------------------------------------------------------------------//

#include <fxos/util/Timer.h>
#include <fxos/util/format.h>

Timer::Timer():
    time_ns {0}, running {false}, start_time {}, depth {0}
{
}

void Timer::start(void)
{
    if(this->depth++ == 0) {
        this->running = true;
        clock_gettime(CLOCK_REALTIME, &this->start_time);
    }
}

void Timer::stop(void)
{
    if(--this->depth == 0) {
        this->running = false;
        struct timespec end;
        clock_gettime(CLOCK_REALTIME, &end);

        this->time_ns += 1000000000 * (end.tv_sec - this->start_time.tv_sec)
            + (end.tv_nsec - this->start_time.tv_nsec);

        this->start_time.tv_sec = 0;
        this->start_time.tv_nsec = 0;
    }
}

std::string Timer::format_time(uint64_t time_ns)
{
    if(time_ns < 2000) return format("%lld ns", time_ns);
    time_ns /= 1000;
    if(time_ns < 2000) return format("%lld us", time_ns);
    time_ns /= 1000;
    if(time_ns < 2000) return format("%lld ms", time_ns);
    time_ns /= 1000;
    return format("%lld s", time_ns);
}

std::string Timer::format_time() const
{
    return Timer::format_time(this->time_ns);
}