TimeStamp.cpp

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/****************************************************************
 *
 * Copyright (c) 2010
 *
 * Fraunhofer Institute for Manufacturing Engineering   
 * and Automation (IPA)
 *
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *
 * Project name: care-o-bot
 * ROS stack name: cob3_common
 * ROS package name: generic_can
 * Description:
 *                                                              
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *                      
 * Author: Christian Connette, email:christian.connette@ipa.fhg.de
 * Supervised by: Christian Connette, email:christian.connette@ipa.fhg.de
 *
 * Date of creation: Feb 2009
 * ToDo: Check if this is still neccessary. Can we use the ROS-Infrastructure within the implementation?
 *
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
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 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
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 *     * Neither the name of the Fraunhofer Institute for Manufacturing 
 *       Engineering and Automation (IPA) nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License LGPL as 
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License LGPL for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License LGPL along with this program. 
 * If not, see <http://www.gnu.org/licenses/>.
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 ****************************************************************/

#include <cob_utilities/TimeStamp.h>

//-----------------------------------------------------------------------------

TimeStamp::TimeStamp()
{
        m_TimeStamp.tv_sec = 0;
        m_TimeStamp.tv_nsec = 0;
}

void TimeStamp::SetNow()
{
        ::clock_gettime(CLOCK_REALTIME, &m_TimeStamp);
}

double TimeStamp::TimespecToDouble(const ::timespec& LargeInt)
{
        return double(LargeInt.tv_sec) + double(LargeInt.tv_nsec) / 1e9;
}

::timespec TimeStamp::DoubleToTimespec(double TimeS)    
{       
        ::timespec DeltaTime;
        if (! ( TimeS < 4e9 && TimeS > 0.0 ))
        {
                DeltaTime.tv_sec = 0;
                DeltaTime.tv_nsec = 0;
                return DeltaTime;
        }

        DeltaTime.tv_sec = ::time_t(TimeS);
        DeltaTime.tv_nsec
                = static_cast<long int>((TimeS - double(DeltaTime.tv_sec)) * 1e9);

        return DeltaTime;
}

double TimeStamp::operator-(const TimeStamp& EarlierTime) const
{
        ::timespec Res;

        Res.tv_sec = m_TimeStamp.tv_sec - EarlierTime.m_TimeStamp.tv_sec;
        Res.tv_nsec = m_TimeStamp.tv_nsec - EarlierTime.m_TimeStamp.tv_nsec;

        if (Res.tv_nsec < 0) {
                Res.tv_sec--;
                Res.tv_nsec += 1000000000;
        }

        return TimespecToDouble(Res);
}

void TimeStamp::operator+=(double TimeS)
{
        ::timespec Dbl = DoubleToTimespec(TimeS);
        m_TimeStamp.tv_sec += Dbl.tv_sec;
        m_TimeStamp.tv_nsec += Dbl.tv_nsec;
        if (m_TimeStamp.tv_nsec > 1000000000)
        {
                m_TimeStamp.tv_sec++;
                m_TimeStamp.tv_nsec -= 1000000000;
        }
}

void TimeStamp::operator-=(double TimeS)
{
        ::timespec Dbl = DoubleToTimespec(TimeS);
        m_TimeStamp.tv_sec -= Dbl.tv_sec;
        m_TimeStamp.tv_nsec -= Dbl.tv_nsec;
        if (m_TimeStamp.tv_nsec < 0.0)
        {
                m_TimeStamp.tv_sec--;
                m_TimeStamp.tv_nsec += 1000000000;
        }
}

bool TimeStamp::operator>(const TimeStamp& Time)
{
        if (m_TimeStamp.tv_sec > Time.m_TimeStamp.tv_sec) return true;
        if ((m_TimeStamp.tv_sec == Time.m_TimeStamp.tv_sec) &&
                (m_TimeStamp.tv_nsec > Time.m_TimeStamp.tv_nsec)) return true;
        return false;
}

bool TimeStamp::operator<(const TimeStamp& Time)
{
        if (m_TimeStamp.tv_sec < Time.m_TimeStamp.tv_sec) return true;
        if ((m_TimeStamp.tv_sec == Time.m_TimeStamp.tv_sec) &&
                (m_TimeStamp.tv_nsec < Time.m_TimeStamp.tv_nsec)) return true;
        return false;
}

void TimeStamp::getTimeStamp(long& lSeconds, long& lNanoSeconds)
{
        lSeconds = m_TimeStamp.tv_sec;
        lNanoSeconds = m_TimeStamp.tv_nsec;
};

void TimeStamp::setTimeStamp(const long& lSeconds, const long& lNanoSeconds)
{
        m_TimeStamp.tv_sec = lSeconds;
        m_TimeStamp.tv_nsec = lNanoSeconds;
};

std::string TimeStamp::CurrentToString()
{
# define TIME_SIZE 400

        const struct tm *tm;
        size_t len;
        time_t now;
        char pres[TIME_SIZE];
        std::string s;

        now = time ( NULL );
        tm = localtime ( &now );
        len = strftime ( pres, TIME_SIZE, "%Y-%m-%d %H:%M:%S.", tm );

        s = (std::string)pres + NumToString(m_TimeStamp.tv_nsec / 1000);

        return s;
# undef TIME_SIZE
}

std::string TimeStamp::ToString()
{
# define TIME_SIZE 4000

        const struct tm *tm;
        size_t len;
        //time_t now;
        char pres[TIME_SIZE];
        std::string s;

        tm = localtime ( &m_TimeStamp.tv_sec );
        len = strftime ( pres, TIME_SIZE, "%Y-%m-%d %H:%M:%S.", tm );

        s = (std::string)pres + NumToString(m_TimeStamp.tv_nsec / 1000);
        
        return s;
# undef TIME_SIZE
}