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108 lines
2.7 KiB
108 lines
2.7 KiB
/*
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Part of NTP MODULE
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*/
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// Based on https://github.com/PaulStoffregen/time
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#pragma once
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#include <time.h>
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#include <sys/time.h>
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constexpr time_t daysPerWeek = 7;
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constexpr time_t secondsPerMinute = 60;
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constexpr time_t secondsPerHour = 3600;
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constexpr time_t secondsPerDay = secondsPerHour * 24;
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constexpr time_t secondsPerWeek = daysPerWeek * secondsPerDay;
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constexpr time_t secondsPerYear = secondsPerWeek * 52;
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constexpr time_t secondsY2K = 946684800; // the time at the start of y2k
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// wall clock values
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template <typename T>
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constexpr const T numberOfSeconds(T ts) {
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return (ts % (T)secondsPerMinute);
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}
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template <typename T>
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constexpr const T numberOfMinutes(T ts) {
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return ((ts / (T)secondsPerMinute) % (T)secondsPerMinute);
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}
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template <typename T>
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constexpr const time_t numberOfHours(T ts) {
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return ((ts % (T)secondsPerDay) / (T)secondsPerHour);
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}
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// week starts with sunday as number 1, monday as 2 etc.
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constexpr const int dayOfWeek(time_t ts) {
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return ((ts / secondsPerDay + 4) % daysPerWeek) + 1;
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}
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// the number of days since 0 (Jan 1 1970 in case of time_t values)
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constexpr const int elapsedDays(uint32_t ts) {
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return (ts / secondsPerDay);
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}
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// the number of seconds since last midnight
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constexpr const uint32_t elapsedSecsToday(uint32_t ts) {
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return (ts % (uint32_t)secondsPerDay);
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}
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// note that week starts on day 1
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constexpr const uint32_t elapsedSecsThisWeek(uint32_t ts) {
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return elapsedSecsToday(ts) + ((dayOfWeek(ts) - 1) * (uint32_t)secondsPerDay);
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}
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// The following methods are used in calculating alarms and assume the clock is set to a date later than Jan 1 1971
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// Always set the correct time before settting alarms
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// time at the start of the given day
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constexpr const time_t previousMidnight(time_t ts) {
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return ((ts / secondsPerDay) * secondsPerDay);
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}
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// time at the end of the given day
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constexpr const time_t nextMidnight(time_t ts) {
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return previousMidnight(ts) + secondsPerDay;
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}
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// time at the start of the week for the given time
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constexpr const time_t previousSunday(time_t ts) {
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return ts - elapsedSecsThisWeek(ts);
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}
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// time at the end of the week for the given time
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constexpr const time_t nextSunday(time_t ts) {
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return previousSunday(ts) + secondsPerWeek;
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}
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int utc_hour(time_t ts);
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int utc_minute(time_t ts);
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int utc_second(time_t ts);
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int utc_day(time_t ts);
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int utc_weekday(time_t ts);
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int utc_month(time_t ts);
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int utc_year(time_t ts);
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int hour(time_t ts);
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int minute(time_t ts);
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int second(time_t ts);
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int day(time_t ts);
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int weekday(time_t ts);
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int month(time_t ts);
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int year(time_t ts);
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int hour();
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int minute();
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int second();
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int day();
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int weekday();
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int month();
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int year();
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time_t now();
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