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#include "Stdafx.h"

#if !defined(__DURATION_H__)
	#include "Duration.h"
#endif

#ifdef _DEBUG
	#define new DEBUG_NEW
	#undef THIS_FILE
	static char THIS_FILE[] = __FILE__;
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CDuration::CDuration(void)
{
	LARGE_INTEGER liFrequency;

	QueryPerformanceFrequency(&liFrequency);
	m_llFrequency = liFrequency.QuadPart;

	// Calibration
	Start();
	Stop();

	m_llCorrection = m_liStop.QuadPart - m_liStart.QuadPart;
}

void CDuration::Start(void)
{
	// Ensure we will not be interrupted by any other thread for a while
	Sleep(0);
	QueryPerformanceCounter(&m_liStart);
}

//////////////////////////////////////////////////////////////////////
// Implementation
//////////////////////////////////////////////////////////////////////

void CDuration::Stop(void)
{
	QueryPerformanceCounter(&m_liStop);
}

double CDuration::GetDuration(void) const
{
	return (double)(m_liStop.QuadPart - m_liStart.QuadPart - m_llCorrection) * 1000000.0 / m_llFrequency;
}

CString CDuration::Format()
{
	long lDays(0);
	int nHours(0);
	int nMins(0);
	int nSecs(0);

	double nDuration;

	CString strRet;

	nDuration = GetDuration() / 1000000.0;

	lDays = long(nDuration / (24. * 60. * 60.));
	nDuration -= lDays * (24. * 60. * 60.);

	nHours = int(nDuration / (60. * 60.));
	nDuration -= nHours * (60. * 60.);

	nMins = int(nDuration / (60.));
	nDuration -= nMins * (60.);

	nSecs = int(nDuration);
	nDuration -= nSecs;

	nDuration *= 1000.0;

	strRet.Format(_T("%u %02u:%02u:%02u.%03u"),lDays,nHours,nMins,nSecs,int(nDuration));

	return strRet;
}