/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2005,2006 INRIA
* Copyright (c) 2007 Emmanuelle Laprise
*
* 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>
* TimeStep support by Emmanuelle Laprise <emmanuelle.laprise@bluekazoo.ca>
*/
#include "nstime.h"
#include "ns3/abort.h"
#include "ns3/global-value.h"
#include "ns3/enum.h"
#include "ns3/string.h"
#include "ns3/object.h"
#include "ns3/config.h"
#include <math.h>
#include <sstream>
namespace ns3 {
Time::Time (const std::string& s)
{
std::string::size_type n = s.find_first_not_of ("0123456789.");
if (n != std::string::npos)
{ // Found non-numeric
std::istringstream iss;
iss.str (s.substr (0, n));
double r;
iss >> r;
std::string trailer = s.substr (n, std::string::npos);
if (trailer == std::string ("s"))
{
*this = Time::FromDouble (r, Time::S);
return;
}
if (trailer == std::string ("ms"))
{
*this = Time::FromDouble (r, Time::MS);
return;
}
if (trailer == std::string ("us"))
{
*this = Time::FromDouble (r, Time::US);
return;
}
if (trailer == std::string ("ns"))
{
*this = Time::FromDouble (r, Time::NS);
return;
}
if (trailer == std::string ("ps"))
{
*this = Time::FromDouble (r, Time::PS);
return;
}
if (trailer == std::string ("fs"))
{
*this = Time::FromDouble (r, Time::FS);
return;
}
NS_ABORT_MSG ("Can't Parse Time " << s);
}
// else
// they didn't provide units, assume seconds
std::istringstream iss;
iss.str (s);
double v;
iss >> v;
*this = Time::FromDouble (v, Time::S);
}
struct Time::Resolution
Time::GetNsResolution (void)
{
struct Resolution resolution;
SetResolution (Time::NS, &resolution);
return resolution;
}
void
Time::SetResolution (enum Unit resolution)
{
SetResolution (resolution, PeekResolution ());
}
void
Time::SetResolution (enum Unit unit, struct Resolution *resolution)
{
int8_t power [LAST] = {15, 12, 9, 6, 3, 0};
for (int i = 0; i < Time::LAST; i++)
{
int shift = power[i] - power[(int)unit];
uint64_t factor = (uint64_t) pow (10, fabs (shift));
struct Information *info = &resolution->info[i];
info->factor = factor;
if (shift == 0)
{
info->timeFrom = HighPrecision (1, false);
info->timeTo = HighPrecision (1, false);
info->toMul = true;
info->fromMul = true;
}
else if (shift > 0)
{
info->timeFrom = HighPrecision (factor, false);
info->timeTo = HighPrecision::Invert (factor);
info->toMul = false;
info->fromMul = true;
}
else
{
NS_ASSERT (shift < 0);
info->timeFrom = HighPrecision::Invert (factor);
info->timeTo = HighPrecision (factor, false);
info->toMul = true;
info->fromMul = false;
}
}
resolution->unit = unit;
}
enum Time::Unit
Time::GetResolution (void)
{
return PeekResolution ()->unit;
}
std::ostream&
operator<< (std::ostream& os, const Time & time)
{
std::string unit;
switch (Time::GetResolution ())
{
case Time::S:
unit = "s";
break;
case Time::MS:
unit = "ms";
break;
case Time::US:
unit = "us";
break;
case Time::NS:
unit = "ns";
break;
case Time::PS:
unit = "ps";
break;
case Time::FS:
unit = "fs";
break;
case Time::LAST:
NS_ABORT_MSG ("can't be reached");
unit = "unreachable";
break;
}
double v = Time::ToDouble (time, Time::GetResolution ());
os << v << unit;
return os;
}
std::istream& operator>> (std::istream& is, Time & time)
{
std::string value;
is >> value;
time = Time (value);
return is;
}
ATTRIBUTE_VALUE_IMPLEMENT (Time);
ATTRIBUTE_CHECKER_IMPLEMENT (Time);
} // namespace ns3
#include "ns3/test.h"
namespace ns3 {
class Bug863TestCase : public TestCase
{
public:
Bug863TestCase ();
virtual bool DoRun (void);
};
Bug863TestCase::Bug863TestCase ()
: TestCase ("Bug 863")
{
}
bool Bug863TestCase::DoRun (void)
{
Scalar result = Scalar (0.9) / Scalar (1.0);
NS_TEST_ASSERT_MSG_EQ ((result == Scalar (0.9)), true, "Invalid arithmetic result");
return false;
}
class TimeSimpleTestCase : public TestCase
{
public:
TimeSimpleTestCase (enum Time::Unit resolution);
private:
virtual bool DoRun (void);
virtual void DoTearDown (void);
enum Time::Unit m_originalResolution;
enum Time::Unit m_resolution;
};
TimeSimpleTestCase::TimeSimpleTestCase (enum Time::Unit resolution)
: TestCase ("Sanity check of common time operations"),
m_resolution (resolution)
{}
bool
TimeSimpleTestCase::DoRun (void)
{
m_originalResolution = Time::GetResolution ();
Time::SetResolution (m_resolution);
NS_TEST_ASSERT_MSG_EQ_TOL (Seconds (1.0).GetSeconds (), 1.0, TimeStep (1).GetSeconds (),
"is 1 really 1 ?");
NS_TEST_ASSERT_MSG_EQ_TOL (Seconds (10.0).GetSeconds (), 10.0, TimeStep (1).GetSeconds (),
"is 10 really 10 ?");
NS_TEST_ASSERT_MSG_EQ (MilliSeconds (1).GetMilliSeconds (), 1,
"is 1ms really 1ms ?");
NS_TEST_ASSERT_MSG_EQ (MicroSeconds (1).GetMicroSeconds (), 1,
"is 1us really 1us ?");
#if 0
Time ns = NanoSeconds (1);
ns.GetNanoSeconds ();
NS_TEST_ASSERT_MSG_EQ (NanoSeconds (1).GetNanoSeconds (), 1,
"is 1ns really 1ns ?");
NS_TEST_ASSERT_MSG_EQ (PicoSeconds (1).GetPicoSeconds (), 1,
"is 1ps really 1ps ?");
NS_TEST_ASSERT_MSG_EQ (FemtoSeconds (1).GetFemtoSeconds (), 1,
"is 1fs really 1fs ?");
#endif
return false;
}
void
TimeSimpleTestCase::DoTearDown (void)
{
Time::SetResolution (m_originalResolution);
}
static class TimeTestSuite : public TestSuite
{
public:
TimeTestSuite ()
: TestSuite ("time", UNIT)
{
AddTestCase (new Bug863TestCase ());
AddTestCase (new TimeSimpleTestCase (Time::US));
}
} g_timeTestSuite;
} // namespace ns3