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#pragma once
#include <cstdint>
#include <ostream>
#include <string>
namespace OpenVic {
// A relative period between points in time, measured in days
struct Timespan {
using day_t = int64_t;
private:
day_t days;
public:
Timespan(day_t value = 0);
bool operator<(Timespan other) const;
bool operator>(Timespan other) const;
bool operator<=(Timespan other) const;
bool operator>=(Timespan other) const;
bool operator==(Timespan other) const;
bool operator!=(Timespan other) const;
Timespan operator+(Timespan other) const;
Timespan operator-(Timespan other) const;
Timespan operator*(day_t factor) const;
Timespan operator/(day_t factor) const;
Timespan& operator+=(Timespan other);
Timespan& operator-=(Timespan other);
Timespan& operator++();
Timespan operator++(int);
explicit operator day_t() const;
explicit operator double() const;
std::string to_string() const;
explicit operator std::string() const;
static Timespan fromYears(day_t num);
static Timespan fromMonths(day_t num);
static Timespan fromDays(day_t num);
};
std::ostream& operator<<(std::ostream& out, Timespan const& timespan);
// Represents an in-game date
// Note: Current implementation does not account for leap-years, or dates before Year 0
struct Date {
using year_t = uint16_t;
using month_t = uint8_t;
using day_t = uint8_t;
static constexpr Timespan::day_t MONTHS_IN_YEAR = 12;
static constexpr Timespan::day_t DAYS_IN_YEAR = 365;
static constexpr Timespan::day_t DAYS_IN_MONTH[MONTHS_IN_YEAR] { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
static Timespan::day_t const* DAYS_UP_TO_MONTH;
static month_t const* MONTH_FROM_DAY_IN_YEAR;
static constexpr char SEPARATOR_CHARACTER = '.';
private:
// Number of days since Jan 1st, Year 0
Timespan timespan;
static Timespan _dateToTimespan(year_t year, month_t month, day_t day);
static Timespan::day_t const* generate_days_up_to_month();
static month_t const* generate_month_from_day_in_year();
public:
// The Timespan is considered to be the number of days since Jan 1st, Year 0
Date(Timespan total_days);
// Year month day specification
Date(year_t year = 0, month_t month = 1, day_t day = 1);
year_t getYear() const;
month_t getMonth() const;
day_t getDay() const;
bool operator<(Date other) const;
bool operator>(Date other) const;
bool operator<=(Date other) const;
bool operator>=(Date other) const;
bool operator==(Date other) const;
bool operator!=(Date other) const;
Date operator+(Timespan other) const;
Timespan operator-(Date other) const;
Date& operator+=(Timespan other);
Date& operator-=(Timespan other);
Date& operator++();
Date operator++(int);
std::string to_string() const;
explicit operator std::string() const;
// Parsed from string of the form YYYY.MM.DD
static Date from_string(char const* str, char const* end, bool* successful = nullptr);
static Date from_string(char const* str, size_t length, bool* successful = nullptr);
static Date from_string(std::string_view str, bool* successful = nullptr);
};
std::ostream& operator<<(std::ostream& out, Date const& date);
}
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