112 lines
2.6 KiB
C++
Executable File
112 lines
2.6 KiB
C++
Executable File
#ifndef JULIAN_H_
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#define JULIAN_H_
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#include "Globals.h"
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#include "Timespan.h"
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#include <ctime>
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#include <iostream>
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class Julian {
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public:
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Julian();
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Julian(const Julian& jul);
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Julian(const time_t t);
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Julian(int year, double day);
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Julian(int year, int mon, int day, int hour, int min, double sec);
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~Julian() {
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};
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/*
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* comparison operators
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*/
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bool operator==(const Julian &date) const;
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bool operator!=(const Julian &date) const;
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bool operator>(const Julian &date) const;
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bool operator<(const Julian &date) const;
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bool operator>=(const Julian &date) const;
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bool operator<=(const Julian &date) const;
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// asign Julian
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Julian & operator=(const Julian& b);
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// assign double
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Julian & operator=(const double b);
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// add Timespan
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Julian operator+(const Timespan& b) const;
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// subtract Timespan
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Julian operator-(const Timespan& b) const;
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// subtracting two Julians produces a Timespan
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Timespan operator-(const Julian& b) const;
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friend std::ostream & operator<<(std::ostream& stream, const Julian& julian);
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struct DateTimeComponents {
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DateTimeComponents()
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: years(0), months(0), days(0),
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hours(0), minutes(0), seconds(0.0) {
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}
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int years;
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int months;
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int days;
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int hours;
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int minutes;
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double seconds;
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};
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void ToGregorian(struct DateTimeComponents* datetime) const;
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time_t ToTime() const;
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double ToGreenwichSiderealTime() const;
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double ToLocalMeanSiderealTime(const double& lon) const;
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double FromJan1_00h_1900() const {
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return date_ - kEPOCH_JAN1_00H_1900;
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}
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double FromJan1_12h_1900() const {
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return date_ - kEPOCH_JAN1_12H_1900;
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}
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double FromJan1_12h_2000() const {
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return date_ - kEPOCH_JAN1_12H_2000;
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}
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double GetDate() const {
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return date_;
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}
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void AddDay(double day) {
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date_ += day;
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}
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void AddHour(double hr) {
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date_ += (hr / kHOURS_PER_DAY);
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}
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void AddMin(double min) {
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date_ += (min / kMINUTES_PER_DAY);
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}
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void AddSec(double sec) {
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date_ += (sec / kSECONDS_PER_DAY);
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}
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static bool IsLeapYear(int y) {
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return (y % 4 == 0 && y % 100 != 0) || (y % 400 == 0);
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}
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protected:
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void Initialize(int year, double day);
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void Initialize(int year, int mon, int day, int hour, int min, double sec);
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/*
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* the stored julian date
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*/
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double date_;
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};
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#endif
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