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// ---
//
// $Id: time.cpp,v 1.4 2008/07/15 20:33:31 hartwork Exp $
//
// CppTest - A C++ Unit Testing Framework
// Copyright (c) 2003 Niklas Lundell
//
// ---
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
//
// ---
#if (defined(__WIN32__) || defined(WIN32))
# include "winconfig.h"
#else
# include "config.h"
#endif
#include "missing.h"
#include "cpptest-time.h"
#ifdef HAVE_GETTIMEOFDAY
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
using namespace std;
namespace Test
{
namespace
{
const unsigned int UsecPerSec = 1000000;
} // anonymous namespace
/// Constructs a time object with zeroed time.
///
Time::Time()
: _sec(0),
_usec(0)
{}
/// Constructs a time object.
///
/// \param sec Seconds.
/// \param usec Micro-seconds.
///
Time::Time(unsigned int sec, unsigned int usec)
: _sec(sec),
_usec(usec)
{}
/// \return Seconds.
///
unsigned int
Time::seconds() const
{
return _sec;
}
/// \return Micro-seconds.
///
unsigned int
Time::microseconds() const
{
return _usec;
}
/// \return The current time.
///
Time
Time::current()
{
struct timeval tv;
gettimeofday(&tv, 0);
return Time(tv.tv_sec, tv.tv_usec);
}
/// \relates Time
///
/// Computes the time elapsed between two time values.
///
/// \param t1 Left-hand time, should be greater than \a t2.
/// \param t2 Right-hand time, should be less than \a t1.
///
/// \return Computed time value.
///
Time
operator-(const Time& t1, const Time& t2)
{
if (t2._sec > t1._sec || (t2._sec == t1._sec && t2._usec > t1._usec))
return Time();
unsigned int sec = t1._sec - t2._sec;
unsigned int usec;
if (t2._usec > t1._usec)
{
--sec;
usec = UsecPerSec - (t2._usec - t1._usec);
}
else
usec = t1._usec - t2._usec;
return Time(sec, usec);
}
/// \relates Time
///
/// Adds two time values.
///
/// \param t1 Left-hand time.
/// \param t2 Right-hand time.
///
/// \return Computed time value.
///
Time
operator+(const Time& t1, const Time& t2)
{
unsigned int sec = t1._sec + t2._sec;
unsigned int usec = t1._usec + t2._usec;
if (usec > UsecPerSec)
{
++sec;
usec -= UsecPerSec;
}
return Time(sec, usec);
}
/// \relates Time
///
/// Outputs a time to an output stream.
///
/// \param os Output stream to write to.
/// \param t %Time to output.
///
/// \return A reference to the given output stream.
///
ostream&
operator<<(ostream& os, const Time& t)
{
int old_fill(os.fill());
int old_width(os.width());
os << t.seconds() << '.';
os.fill('0');
os.width(6);
os << t.microseconds();
os.fill(old_fill);
os.width(old_width);
return os;
}
} // namespace Test
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