/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2005,2006 INRIA

 * All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#include "time.h"

#include "simulator.h"

namespace ns3 {

Time::Time ()

  : m_ns (0)

{}

Time::Time (Time const &o)

  : m_ns (o.m_ns)

{}

Time &

Time::operator = (Time const &o)

{

  m_ns = o.m_ns;

  return *this;

}

Time::Time (int64_t ns)

  : m_ns (ns)

{}

bool 

Time::IsNegative (void) const

{

  return m_ns <= 0;

}

bool 

Time::IsPositive (void) const

{

  return m_ns >= 0;

}

bool 

Time::IsStrictlyNegative (void) const

{

  return m_ns < 0;

}

bool 

Time::IsStrictlyPositive (void) const

{

  return m_ns > 0;

}

bool 

Time::IsZero (void) const

{

  return m_ns == 0;

}

Time 

Time::operator += (Time const &o)

{

  m_ns += o.m_ns;

  return *this;

}

Time 

Time::operator -= (Time const &o)

{

  m_ns -= o.m_ns;

  return *this;

}

double 

Time::ApproximateToSeconds (void) const

{

  double s = m_ns;

  s /= 1000000000;

  return s;

}

int64_t 

Time::ApproximateToMilliSeconds (void) const

{

  int64_t ms = m_ns;

  ms /= 1000000;

  return ms;

}

int64_t 

Time::ApproximateToMicroSeconds (void) const

{

  int64_t us = m_ns;

  us /= 1000;

  return us;

}

int64_t 

Time::ApproximateToNanoSeconds (void) const

{

  return m_ns;

}

/* To decrease the number of keystrokes

 */

static uint64_t 

GetNs (Time const &time)

{

  return time.ApproximateToNanoSeconds ();

}

Time operator + (Time const &lhs, Time const &rhs)

{

  return NanoSeconds (GetNs (lhs) + GetNs (rhs));

}  

Time operator - (Time const &lhs, Time const &rhs)

{

  return NanoSeconds (GetNs (lhs) - GetNs (rhs));

}

bool operator == (Time const &lhs, Time const &rhs)

{

  return GetNs (lhs) == GetNs (rhs);

}

bool operator != (Time const &lhs, Time const &rhs)

{

  return GetNs (lhs) != GetNs (rhs);

}

bool operator <  (Time const &lhs, Time const &rhs)

{

  return GetNs (lhs) < GetNs (rhs);

}

bool operator <= (Time const &lhs, Time const &rhs)

{

  return GetNs (lhs) <= GetNs (rhs);

}

bool operator >  (Time const &lhs, Time const &rhs)

{

  return GetNs (lhs) > GetNs (rhs);

}

bool operator >= (Time const &lhs, Time const &rhs)

{

  return GetNs (lhs) >= GetNs (rhs);

}

Now::Now ()

  : Time (Simulator::Now ())

{}

Seconds::Seconds (double s)

  : Time ((int64_t)(s * 1000000000))

{}

MilliSeconds::MilliSeconds (int32_t ms)

  : Time ((int64_t)(ms * 1000000))

{}

MicroSeconds::MicroSeconds (int32_t us)

  : Time ((int64_t)(us * 1000))

{}

NanoSeconds::NanoSeconds (int64_t ns)

  : Time (ns)

{}

}; // namespace ns3