//
// Timestamp.cpp
//
// $Id: //poco/Main/Foundation/src/Timestamp.cpp#5 $
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. 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.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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//


#include "Foundation/Timestamp.h"
#include "Foundation/Exception.h"
#if defined(POCO_OS_FAMILY_UNIX)
#include <unistd.h>
#include <sys/time.h>
#include <sys/times.h>
#elif defined(POCO_OS_FAMILY_WINDOWS)
#include <windows.h>
#endif


Foundation_BEGIN


Timestamp::Timestamp()
{
	update();
}


Timestamp::Timestamp(TimeVal tv)
{
	_ts = tv;
}


Timestamp::Timestamp(const Timestamp& other)
{
	_ts = other._ts;
}


Timestamp::~Timestamp()
{
}


Timestamp& Timestamp::operator = (const Timestamp& other)
{
	_ts = other._ts;
	return *this;
}


Timestamp& Timestamp::operator = (TimeVal tv)
{
	_ts = tv;
	return *this;
}


Timestamp Timestamp::fromEpochTime(time_t t)
{
	return Timestamp(TimeVal(t)*resolution());
}


Timestamp Timestamp::fromUtcTime(UtcTimeVal val)
{
	val -= (TimeDiff(0x01b21dd2) << 32) + 0x13814000;
	val /= 10;
	return Timestamp(val);
}


void Timestamp::update()
{
#if defined(POCO_OS_FAMILY_WINDOWS)

	FILETIME ft;
	GetSystemTimeAsFileTime(&ft);
	ULARGE_INTEGER epoch; // UNIX epoch (1970-01-01 00:00:00) expressed in Windows NT FILETIME
	epoch.LowPart  = 0xD53E8000;
	epoch.HighPart = 0x019DB1DE;

	ULARGE_INTEGER ts;
	ts.LowPart  = ft.dwLowDateTime;
	ts.HighPart = ft.dwHighDateTime;
	ts.QuadPart -= epoch.QuadPart;
	_ts = ts.QuadPart/10;

#else

	struct timeval tv;
	if (gettimeofday(&tv, NULL))
		throw SystemException("cannot get time of day");
	_ts = TimeVal(tv.tv_sec)*resolution() + tv.tv_usec;
	
#endif
}


#if defined(_WIN32)


Timestamp Timestamp::fromFileTimeNP(UInt32 fileTimeLow, UInt32 fileTimeHigh)
{
	ULARGE_INTEGER epoch; // UNIX epoch (1970-01-01 00:00:00) expressed in Windows NT FILETIME
	epoch.LowPart  = 0xD53E8000;
	epoch.HighPart = 0x019DB1DE;
	
	ULARGE_INTEGER ts;
	ts.LowPart  = fileTimeLow;
	ts.HighPart = fileTimeHigh;
	ts.QuadPart -= epoch.QuadPart;

	return Timestamp(ts.QuadPart/10);
}


void Timestamp::toFileTimeNP(UInt32& fileTimeLow, UInt32& fileTimeHigh) const
{
	ULARGE_INTEGER epoch; // UNIX epoch (1970-01-01 00:00:00) expressed in Windows NT FILETIME
	epoch.LowPart  = 0xD53E8000;
	epoch.HighPart = 0x019DB1DE;

	ULARGE_INTEGER ts;
	ts.QuadPart  = _ts*10;
	ts.QuadPart += epoch.QuadPart;
	fileTimeLow  = ts.LowPart;
	fileTimeHigh = ts.HighPart;
}


#endif



Foundation_END