mirror of https://github.com/OpenRCT2/OpenRCT2.git
122 lines
2.7 KiB
C++
122 lines
2.7 KiB
C++
/*****************************************************************************
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* Copyright (c) 2014-2020 OpenRCT2 developers
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*
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* For a complete list of all authors, please refer to contributors.md
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* Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is licensed under the GNU General Public License version 3.
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*****************************************************************************/
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#include "localisation/Date.h"
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#include "Date.h"
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#include "core/Guard.hpp"
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#include <algorithm>
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using namespace OpenRCT2;
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constexpr int32_t MONTH_TICKS_INCREMENT = 4;
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constexpr int32_t MASK_WEEK_TICKS = 0x3FFF;
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constexpr int32_t MASK_FORTNIGHT_TICKS = 0x7FFF;
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constexpr int32_t MASK_MONTH_TICKS = 0xFFFF;
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Date::Date(uint32_t monthsElapsed, uint16_t 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(int32_t year, int32_t month, int32_t 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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int32_t monthsElapsed = (year * MONTH_COUNT) + month;
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// Day
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int32_t 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 = std::clamp(day, 0, 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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int32_t 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 = static_cast<uint16_t>(monthTicks);
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}
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}
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uint16_t Date::GetMonthTicks() const
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{
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return _monthTicks;
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}
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uint32_t Date::GetMonthsElapsed() const
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{
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return _monthsElapsed;
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}
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int32_t 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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int32_t Date::GetMonth() const
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{
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return _monthsElapsed % MONTH_COUNT;
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}
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int32_t 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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int32_t prevMonthTick = _monthTicks - 4;
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int32_t currentMonth = GetMonth();
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int32_t 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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int32_t Date::GetDaysInMonth(int32_t 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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