mirror of https://github.com/OpenRCT2/OpenRCT2.git
127 lines
3.0 KiB
C++
127 lines
3.0 KiB
C++
#pragma region Copyright (c) 2014-2017 OpenRCT2 Developers
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/*****************************************************************************
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
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* For more information, visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* A full copy of the GNU General Public License can be found in licence.txt
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*****************************************************************************/
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#pragma endregion
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#include "core/Guard.hpp"
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#include "core/Math.hpp"
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#include "localisation/Date.h"
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#include "Date.h"
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using namespace OpenRCT2;
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constexpr sint32 MONTH_TICKS_INCREMENT = 4;
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constexpr sint32 MASK_WEEK_TICKS = 0x3FFF;
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constexpr sint32 MASK_FORTNIGHT_TICKS = 0x7FFF;
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constexpr sint32 MASK_MONTH_TICKS = 0xFFFF;
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Date::Date(uint32 monthsElapsed, uint16 monthTicks)
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: _monthTicks(monthTicks),
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_monthsElapsed(monthsElapsed)
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{
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}
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Date Date::FromYMD(sint32 year, sint32 month, sint32 day)
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{
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// Year, months
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Guard::ArgumentInRange(month, 0, MONTH_COUNT - 1);
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sint32 monthsElapsed = (year * MONTH_COUNT) + month;
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// Day
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sint32 monthTicks = 0;
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if (day != 0)
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{
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auto daysInMonth = GetDaysInMonth(month);
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day = Math::Clamp(0, day, daysInMonth - 1);
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monthTicks = (day << 16) / daysInMonth;
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}
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return Date(monthsElapsed, monthTicks);
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}
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void Date::Update()
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{
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sint32 monthTicks = _monthTicks + MONTH_TICKS_INCREMENT;
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if (monthTicks > MASK_MONTH_TICKS)
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{
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_monthTicks = 0;
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_monthsElapsed++;
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}
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else
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{
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_monthTicks = (uint16)monthTicks;
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}
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}
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uint16 Date::GetMonthTicks() const
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{
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return _monthTicks;
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}
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uint32 Date::GetMonthsElapsed() const
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{
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return _monthsElapsed;
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}
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sint32 Date::GetDay() const
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{
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auto month = GetMonth();
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auto daysInMonth = GetDaysInMonth(month);
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return ((_monthTicks * daysInMonth) >> 16) & 0xFF;
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}
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sint32 Date::GetMonth() const
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{
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return _monthsElapsed % MONTH_COUNT;
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}
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sint32 Date::GetYear() const
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{
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return _monthsElapsed / MONTH_COUNT;
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}
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bool Date::IsDayStart() const
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{
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if (_monthTicks < 4)
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{
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return false;
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}
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sint32 prevMonthTick = _monthTicks - 4;
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sint32 currentMonth = GetMonth();
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sint32 currentDaysInMonth = GetDaysInMonth(currentMonth);
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return ((currentDaysInMonth * _monthTicks) >> 16 != (currentDaysInMonth * prevMonthTick) >> 16);
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}
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bool Date::IsWeekStart() const
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{
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return (_monthTicks & MASK_WEEK_TICKS) == 0;
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}
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bool Date::IsFortnightStart() const
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{
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return (_monthTicks & MASK_FORTNIGHT_TICKS) == 0;
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}
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bool Date::IsMonthStart() const
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{
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return (_monthTicks == 0);
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}
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sint32 Date::GetDaysInMonth(sint32 month)
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{
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Guard::ArgumentInRange(month, 0, MONTH_COUNT - 1);
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return days_in_month[month];
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}
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