Optimized Enter/Leave Logger

#include "StdAfx.h"
#include "TimeParser.h"



TimeParser::TimeParser( const DWORD dwStartTime_i,
        const SYSTEMTIME& stStartupTime_i )
{
    m_dwStartTime = dwStartTime_i;
    m_SystemStartTime = stStartupTime_i;
    m_stStartTime = stStartupTime_i;
}

TimeParser::~TimeParser(void)
{
}

/* 
This function receives a TickCount( DWORD ) and provides SYSTEMTIME as output.
The starttime( SYSTEMTIME instance) and its tickcount is used to convert
current tickcount to SYSTEMTIME.
 */
SYSTEMTIME TimeParser::ConvertTickCountToSysTime( const DWORD dwTickCount_i )
{
    DWORD dwDiff = dwTickCount_i - m_dwStartTime; // Ms after startup Time.
    // CTimeSpan timeSpanObj( dwDiff / 1000 );
    // CTime timeInSec = m_SystemStartTime + timeSpanObj;
    SYSTEMTIME stToAdd = m_stStartTime;
    stToAdd.wMilliseconds += dwDiff;
    long lSeconds = 0;
    if( stToAdd.wMilliseconds > 1000 )
    {
        lSeconds = ( stToAdd.wMilliseconds / 1000 );
    }
    // LONG lDays, int nHours, int nMins, int nSecs
    CTimeSpan timeSpan( 0, 0, 0, lSeconds );
    int nMsOutput = stToAdd.wMilliseconds % 1000;

    // Reset Millisecond to 0, avoid calculation from CTime class.
    stToAdd.wMilliseconds = 0;
    CTime       stToAddObj = stToAdd;
    stToAddObj = stToAddObj + timeSpan;

    stToAddObj.GetAsSystemTime( stToAdd );
    stToAdd.wMilliseconds = nMsOutput;
    return stToAdd;
}