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root / quad2 / arduino / src / ros_lib / duration.cpp @ c1426757

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/* 
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 * Software License Agreement (BSD License)
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 *
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 * Copyright (c) 2011, Willow Garage, Inc.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 *  * Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 *  * Redistributions in binary form must reproduce the above
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 *    copyright notice, this list of conditions and the following
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 *    disclaimer in the documentation and/or other materials provided
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 *    with the distribution.
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 *  * Neither the name of Willow Garage, Inc. nor the names of its
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 *    contributors may be used to endorse or promote prducts derived
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 *    from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <math.h>
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#include "ros/duration.h"
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namespace ros
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{
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  void normalizeSecNSecSigned(long &sec, long &nsec)
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  {
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    long nsec_part = nsec;
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    long sec_part = sec;
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    while (nsec_part > 1000000000L)
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    {
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      nsec_part -= 1000000000L;
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      ++sec_part;
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    }
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    while (nsec_part < 0)
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    {
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      nsec_part += 1000000000L;
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      --sec_part;
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    }
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    sec = sec_part;
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    nsec = nsec_part;
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  }
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  Duration& Duration::operator+=(const Duration &rhs)
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  {
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    sec += rhs.sec;
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    nsec += rhs.nsec;
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    normalizeSecNSecSigned(sec, nsec);
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    return *this;
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  }
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  Duration& Duration::operator-=(const Duration &rhs){
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    sec += -rhs.sec;
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    nsec += -rhs.nsec;
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    normalizeSecNSecSigned(sec, nsec);
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    return *this;
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  }
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  Duration& Duration::operator*=(double scale){
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    sec *= scale;
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    nsec *= scale;
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    normalizeSecNSecSigned(sec, nsec);
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    return *this;
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  }
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}