Epoch.h

/*
 * MIT License
 * Copyright (c) 2022 Brian T. Park
 */
 
#ifndef ACE_TIME_EPOCH_H
#define ACE_TIME_EPOCH_H
 
#include <stdint.h>
#include "EpochConverterHinnant.h"
 
#define ACE_TIME_EPOCH_CONVERTER EpochConverterHinnant
 
namespace ace_time {
 
class Epoch {
  public:
    static int16_t currentEpochYear() {
      return sCurrentEpochYear;
    }
 
    static void currentEpochYear(int16_t year) {
      sCurrentEpochYear = year;
      sDaysToCurrentEpochFromInternalEpoch = daysFromInternalEpoch(year);
    }
 
    static int32_t daysFromInternalEpoch(int16_t year) {
      return ACE_TIME_EPOCH_CONVERTER::toEpochDays(year, 1, 1);
    }
 
    static int32_t daysToCurrentEpochFromInternalEpoch() {
      return sDaysToCurrentEpochFromInternalEpoch;
    }
 
    static int32_t daysToCurrentEpochFromUnixEpoch() {
      return ACE_TIME_EPOCH_CONVERTER::kDaysToInternalEpochFromUnixEpoch
          + sDaysToCurrentEpochFromInternalEpoch;
    }
 
    static int64_t secondsToCurrentEpochFromUnixEpoch64() {
      return daysToCurrentEpochFromUnixEpoch() * (int64_t) 86400;
    }
 
    static int16_t epochValidYearLower() {
      return currentEpochYear() - 50;
    }
 
    static int16_t epochValidYearUpper() {
      return currentEpochYear() + 50;
    }
 
  private:
    static int16_t sCurrentEpochYear;
 
    static int32_t sDaysToCurrentEpochFromInternalEpoch;
};
 
}
 
#endif