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//
// Timestamp.cpp
//
// Library: Foundation
// Package: DateTime
// Module: Timestamp
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Timestamp.h"
#include "Poco/Timespan.h"
#include "Poco/Exception.h"
#include <algorithm>
#undef min
#undef max
#include <limits>
#if defined(POCO_OS_FAMILY_UNIX)
#include <time.h>
#include <unistd.h>
#if defined(POCO_VXWORKS)
#include <timers.h>
#else
#include <sys/time.h>
#include <sys/times.h>
#endif
#elif defined(POCO_OS_FAMILY_WINDOWS)
#include "Poco/UnWindows.h"
#if defined(_WIN32_WCE)
#include <cmath>
#endif
#endif
#ifndef POCO_HAVE_CLOCK_GETTIME
#if (defined(_POSIX_TIMERS) && defined(CLOCK_REALTIME)) || defined(POCO_VXWORKS) || defined(__QNX__)
#ifndef __APPLE__ // See GitHub issue #1453 - not available before Mac OS 10.12/iOS 10
#define POCO_HAVE_CLOCK_GETTIME
#endif
#endif
#endif
#if defined(_WIN32_WCE) && defined(POCO_WINCE_TIMESTAMP_HACK)
//
// See <http://community.opennetcf.com/articles/cf/archive/2007/11/20/getting-a-millisecond-resolution-datetime-under-windows-ce.aspx>
// for an explanation of the following code.
//
// In short: Windows CE system time in most cases only has a resolution of one second.
// But we want millisecond resolution.
//
namespace {
class TickOffset
{
public:
TickOffset()
{
SYSTEMTIME st1, st2;
std::memset(&st1, 0, sizeof(SYSTEMTIME));
std::memset(&st2, 0, sizeof(SYSTEMTIME));
GetSystemTime(&st1);
while (true)
{
GetSystemTime(&st2);
// wait for a rollover
if (st1.wSecond != st2.wSecond)
{
_offset = GetTickCount() % 1000;
break;
}
}
}
void calibrate(int seconds)
{
SYSTEMTIME st1, st2;
systemTime(&st1);
WORD s = st1.wSecond;
int sum = 0;
int remaining = seconds;
while (remaining > 0)
{
systemTime(&st2);
WORD s2 = st2.wSecond;
if (s != s2)
{
remaining--;
// store the offset from zero
sum += (st2.wMilliseconds > 500) ? (st2.wMilliseconds - 1000) : st2.wMilliseconds;
s = st2.wSecond;
}
}
// adjust the offset by the average deviation from zero (round to the integer farthest from zero)
if (sum < 0)
_offset += (int) std::floor(sum / (float)seconds);
else
_offset += (int) std::ceil(sum / (float)seconds);
}
void systemTime(SYSTEMTIME* pST)
{
std::memset(pST, 0, sizeof(SYSTEMTIME));
WORD tick = GetTickCount() % 1000;
GetSystemTime(pST);
WORD ms = (tick >= _offset) ? (tick - _offset) : (1000 - (_offset - tick));
pST->wMilliseconds = ms;
}
void systemTimeAsFileTime(FILETIME* pFT)
{
SYSTEMTIME st;
systemTime(&st);
SystemTimeToFileTime(&st, pFT);
}
private:
WORD _offset;
};
static TickOffset offset;
void GetSystemTimeAsFileTimeWithMillisecondResolution(FILETIME* pFT)
{
offset.systemTimeAsFileTime(pFT);
}
} // namespace
#endif // defined(_WIN32_WCE) && defined(POCO_WINCE_TIMESTAMP_HACK)
namespace Poco {
const Timestamp::TimeVal Timestamp::TIMEVAL_MIN = std::numeric_limits<Timestamp::TimeVal>::min();
const Timestamp::TimeVal Timestamp::TIMEVAL_MAX = std::numeric_limits<Timestamp::TimeVal>::max();
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;
}
void Timestamp::swap(Timestamp& timestamp)
{
std::swap(_ts, timestamp._ts);
}
Timestamp Timestamp::fromEpochTime(std::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;
#if defined(_WIN32_WCE) && defined(POCO_WINCE_TIMESTAMP_HACK)
GetSystemTimeAsFileTimeWithMillisecondResolution(&ft);
#else
GetSystemTimeAsFileTime(&ft);
#endif
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;
#elif defined(POCO_HAVE_CLOCK_GETTIME)
struct timespec ts;
if (clock_gettime(CLOCK_REALTIME, &ts))
throw SystemException("cannot get time of day");
_ts = TimeVal(ts.tv_sec)*resolution() + ts.tv_nsec/1000;
#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
}
Timestamp Timestamp::operator + (const Timespan& span) const
{
return *this + span.totalMicroseconds();
}
Timestamp Timestamp::operator - (const Timespan& span) const
{
return *this - span.totalMicroseconds();
}
Timestamp& Timestamp::operator += (const Timespan& span)
{
return *this += span.totalMicroseconds();
}
Timestamp& Timestamp::operator -= (const Timespan& span)
{
return *this -= span.totalMicroseconds();
}
#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
} // namespace Poco
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