// CurrentMsTime.h: interface for the CCurrentMsTime class.
//
//////////////////////////////////////////////////////////////////////

#pragma once

#include "DllDefines.h"

// Note : this class might not work after year 2038!
// this is because _ftime() returns a long data type since midnight(00:00:00), January 1, 1970
// The long data type will become a negative value after 2038AD
// long data type is 32 bit
// 32 bit value = 2^32 = 4294967296
// Max long data type positive value    = (32 bit value / 2) - 1  = (4294967296 / 2) - 1
//                                      = 2147483647
// secs in a year = 24hrs * 60Min * 60sec * 365.25 days = 31557600 secs
// No of years long data type can represent = Max long data type positive value/secs in a year
//                                          = 2147483647 / 31557600 = 68 years
// Therefore Max year a long data type can represent since midnight(00:00:00), January 1, 1970
// = 1970 + 68 = 2038 AD
// By 2038AD i should have retired! Have u?
class MCCTRDLLCLASS CCurrentMsTime
{
public:
    //  Update Current Time
    static void UpdateCurrentTime();

    //  get current time
    static LONGLONG GetCurrentTime();

    //  get time in seconds
    static double CalTimeSpanInSec(LONGLONG ullMsTime);

    //  get time in minutes
    static double CalTimeSpanInMin(LONGLONG ullMsTime);

    //  get time in hours
    static double CalTimeSpanInHr(LONGLONG ullMsTime);

private:
    // private constructor, this class should not be instantiated
    CCurrentMsTime();

    //  default destructor
    virtual ~CCurrentMsTime();
    //  Current Time
    static LONGLONG m_lCurrentTime;
};