master/GPSTime_8h_source.html

#pragma once


#include <cstdint>


namespace GPSTime {


inline constexpr uint32_t WEEK_MS = 604800000;


[[nodiscard]] constexpr uint64_t epochMs(uint32_t week, uint32_t towMs)

{

    return uint64_t(week) * WEEK_MS + towMs;

}


[[nodiscard]] constexpr bool towAdvances(uint32_t later, uint32_t earlier)

{

    const uint64_t difference = (uint64_t(later) + WEEK_MS - earlier) % WEEK_MS;

    return difference != 0 && difference < WEEK_MS / 2;

}


}  // namespace GPSTime


GPSTime
GPS system time as receivers stamp their epochs: a week number and the milliseconds into that week.
Definition GPSTime.h:6

GPSTime::epochMs
constexpr uint64_t epochMs(uint32_t week, uint32_t towMs)
Milliseconds since the GPS epoch of towMs into week.
Definition GPSTime.h:12

GPSTime::towAdvances
constexpr bool towAdvances(uint32_t later, uint32_t earlier)
Whether time of week later follows earlier by less than half a week, across the week rollover.
Definition GPSTime.h:18

GPSTime::WEEK_MS
constexpr uint32_t WEEK_MS
Milliseconds in a GPS week; every time of week is below it.
Definition GPSTime.h:9