GPSTime.h

#pragma once
#include <stddef.h>
 
class GPSTime
{
   public:
    // time
    int hours;
    int minutes;
    int seconds;
    int milliseconds;
 
    // date
    int day;
    int month;
    int year;
 
    GPSTime();
 
    // Set from NMEA-style time string: hhmmss[.sss]
    void setFromNMEATime(const char *timeStr);
    // Set from NMEA-style date string: ddmmyy
    void setFromNMEADate(const char *dateStr);
 
    // Get formatted time strings
    void getTimeString(char *buffer, size_t bufferSize) const;             // "HH:mm:ss"
    void getTimeStringWithMillis(char *buffer, size_t bufferSize) const;   // "HH:mm:ss.sss"
    void getTimeISOStringWithMillis(char *buffer, size_t bufferSize) const;   // "YYYY-MM-DDTHH:mm:ss.sss"
 
    // Utility
    bool isValid() const;
    void reset();
    int getEpochTime() const
    {
        return (year - 1970) * 365 * 24 * 3600 + (month - 1) * 30 * 24 * 3600 + (day - 1) * 24 * 3600 + hours * 3600 + minutes * 60 +
               seconds;
    }
};