63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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#pragma once
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const ULONGLONG c_millisecond = 10000;
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const ULONGLONG c_second = 1000 * c_millisecond;
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const ULONGLONG c_minute = 60 * c_second;
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const ULONGLONG c_hour = 60 * c_minute;
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const ULONGLONG c_day = 24 * c_hour;
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const int c_unitsOfDate = 4; // Units Year,Month,Week,Day
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const int c_unitsGreaterThanDays = 3; // Units Greater than Days (Year/Month/Week) 3
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const int c_daysInWeek = 7;
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namespace CalculatorApp
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{
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namespace Common
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{
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namespace DateCalculation
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{
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public enum class _Enum_is_bitflag_ DateUnit
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{
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Year = 0x01,
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Month = 0x02,
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Week = 0x04,
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Day = 0x08
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};
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// Struct to store the difference between two Dates in the form of Years, Months , Weeks
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struct DateDifference
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{
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int year = 0;
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int month = 0;
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int week = 0;
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int day = 0;
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};
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class DateCalculationEngine
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{
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public:
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// Constructor
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DateCalculationEngine(_In_ Platform::String^ calendarIdentifier);
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// Public Methods
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bool __nothrow AddDuration(_In_ Windows::Foundation::DateTime startDate, _In_ const DateDifference& duration, _Out_ Windows::Foundation::DateTime *endDate);
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bool __nothrow SubtractDuration(_In_ Windows::Foundation::DateTime startDate, _In_ const DateDifference& duration, _Out_ Windows::Foundation::DateTime *endDate);
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void __nothrow GetDateDifference(_In_ Windows::Foundation::DateTime date1, _In_ Windows::Foundation::DateTime date2, _In_ DateUnit outputFormat, _Out_ DateDifference *difference);
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private:
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// Private Variables
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Windows::Globalization::Calendar^ m_calendar;
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// Private Methods
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int GetDifferenceInDays(Windows::Foundation::DateTime date1, Windows::Foundation::DateTime date2);
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bool TryGetCalendarDaysInMonth(_In_ Windows::Foundation::DateTime date, _Out_ UINT& daysInMonth);
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bool TryGetCalendarDaysInYear(_In_ Windows::Foundation::DateTime date, _Out_ UINT& daysInYear);
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Windows::Foundation::DateTime AdjustCalendarDate(Windows::Foundation::DateTime date, DateUnit dateUnit, int difference);
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};
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}
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}
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}
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