duration.cpp

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#include <math.h>
#include "ros/duration.h"

namespace ros
{
  void normalizeSecNSecSigned(long &sec, long &nsec)
  {
    long nsec_part = nsec;
    long sec_part = sec;
     
    while (nsec_part > 1000000000L)
    {
      nsec_part -= 1000000000L;
      ++sec_part;
    }
    while (nsec_part < 0)
    {
      nsec_part += 1000000000L;
      --sec_part;
    }
    sec = sec_part;
    nsec = nsec_part;
  }

  Duration& Duration::operator+=(const Duration &rhs)
  {
    sec += rhs.sec;
    nsec += rhs.nsec;
    normalizeSecNSecSigned(sec, nsec);
    return *this;
  }

  Duration& Duration::operator-=(const Duration &rhs){
    sec += -rhs.sec;
    nsec += -rhs.nsec;
    normalizeSecNSecSigned(sec, nsec);
    return *this;
  }

  Duration& Duration::operator*=(double scale){
    sec *= scale;
    nsec *= scale;
    normalizeSecNSecSigned(sec, nsec);
    return *this;
  }

}