File content as of revision 0:30537dec6e0b:

/* 
 * Software License Agreement (BSD License)
 *
 * Copyright (c) 2011, Willow Garage, Inc.
 * All rights reserved.
 *
 * 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
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 *  * Neither the name of Willow Garage, Inc. nor the names of its
 *    contributors may be used to endorse or promote prducts derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#include "ros/time.h"

namespace ros
{
  void normalizeSecNSec(unsigned long& sec, unsigned long& nsec){
    unsigned long nsec_part= nsec % 1000000000UL;
    unsigned long sec_part = nsec / 1000000000UL;
    sec += sec_part;
    nsec = nsec_part;
  }

  Time& Time::fromNSec(long t)
  {
    sec = t / 1000000000;
    nsec = t % 1000000000;
    normalizeSecNSec(sec, nsec);
    return *this;
  }

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

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

}