100 lines
4.1 KiB
C
100 lines
4.1 KiB
C
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/********************************************************
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* ██████╗ ██████╗████████╗██╗
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* ██╔════╝ ██╔════╝╚══██╔══╝██║
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* ██║ ███╗██║ ██║ ██║
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* ██║ ██║██║ ██║ ██║
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* ╚██████╔╝╚██████╗ ██║ ███████╗
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* ╚═════╝ ╚═════╝ ╚═╝ ╚══════╝
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* Geophysical Computational Tools & Library (GCTL)
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*
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* Copyright (c) 2022 Yi Zhang (yizhang-geo@zju.edu.cn)
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*
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* GCTL is distributed under a dual licensing scheme. You can redistribute
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* it and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, either version 2
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* of the License, or (at your option) any later version. You should have
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* received a copy of the GNU Lesser General Public License along with this
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* program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If the terms and conditions of the LGPL v.2. would prevent you from using
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* the GCTL, please consider the option to obtain a commercial license for a
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* fee. These licenses are offered by the GCTL's original author. As a rule,
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* licenses are provided "as-is", unlimited in time for a one time fee. Please
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* send corresponding requests to: yizhang-geo@zju.edu.cn. Please do not forget
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* to include some description of your company and the realm of its activities.
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* Also add information on how to contact you by electronic and paper mail.
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******************************************************/
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#ifndef _GCTL_UTC_TIME_H
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#define _GCTL_UTC_TIME_H
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#include "iostream"
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#include "sstream"
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#include "iomanip"
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#include "cmath"
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#include "sys/time.h"
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#include "unistd.h"
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namespace gctl
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{
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enum time_unit
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{
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Millisecond,
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Second,
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Mintue,
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Hour,
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Day,
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Month,
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Year,
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};
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// Function returns true if the given year is a leap year and returns false otherwise.
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bool is_leap_year(int year);
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// Compute the month and day corresponding to the Julian day within the given year.
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void month_and_day(int year, int julian_day, int &month, int &day);
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// Compute the Julian day corresponding to the month and day within the given year.
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void julian_day(int year, int month, int day, int &julian_day);
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/**
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* @brief Convert a decimal year to year, month and day integrals
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*
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* @param deci_year decimal year
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* @param year returned year number
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* @param month returned month number
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* @param day retured day number
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*/
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void decimal_year2date(double deci_year, int &year, int &month, int &day);
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// This struct holds variables and functions for time calculation.
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struct UTC_TIME
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{
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int year, month, day, julday;
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int hour, mint, sec, msec;
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UTC_TIME();
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UTC_TIME(int y, int m, int d, int h, int mt, int s, int ms);
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UTC_TIME(int y, int jd, int h, int mt, int s, int ms);
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UTC_TIME(std::string t_str); // <year>-<month>-<day>T<hour>:<minute>:<sec>.<msec>
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void set_time(int y, int m, int d, int h, int mt, int s, int ms);
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void set_time(int y, int jd, int h, int mt, int s, int ms);
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void set_time(std::string t_str); // <year>-<month>-<day>T<hour>:<minute>:<sec>.<msec>
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void set_rdseed_time(std::string t_str); // <year>,<jday>,<hour>:<minute>:<sec>.<msec>
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void set_to_now(); // set to current UTC time
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void add_duration(double s);
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void round_up_to(time_unit tu);
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double diff_sec(const UTC_TIME &t) const;
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std::string time_str(bool symbolic = false) const;
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std::string rdseed_time_str() const;
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};
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static UTC_TIME UTC_START(1900, 1, 1, 0, 0, 0, 0);
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bool operator==(const UTC_TIME &ta, const UTC_TIME &tb);
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bool operator!=(const UTC_TIME &ta, const UTC_TIME &tb);
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bool operator<(const UTC_TIME &ta, const UTC_TIME &tb);
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bool operator<=(const UTC_TIME &ta, const UTC_TIME &tb);
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}
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#endif // _GCTL_UTC_TIME_H
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