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//
// LocalDateTime.cpp
//
// Library: Foundation
// Package: DateTime
// Module: LocalDateTime
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/LocalDateTime.h"
#include "Poco/Timezone.h"
#include "Poco/Timespan.h"
#include "Poco/Exception.h"
#include <algorithm>
#include <ctime>
#if defined(_WIN32_WCE) && _WIN32_WCE < 0x800
#error #include "wce_time.h"
#endif
namespace Poco {
LocalDateTime::LocalDateTime()
{
determineTzd(true);
}
LocalDateTime::LocalDateTime(int otherYear, int otherMonth, int otherDay, int otherHour, int otherMinute, int otherSecond, int otherMillisecond, int otherMicrosecond):
_dateTime(otherYear, otherMonth, otherDay, otherHour, otherMinute, otherSecond, otherMillisecond, otherMicrosecond)
{
determineTzd();
}
LocalDateTime::LocalDateTime(int otherTzd, int otherYear, int otherMonth, int otherDay, int otherHour, int otherMinute, int otherSecond, int otherMillisecond, int otherMicrosecond):
_dateTime(otherYear, otherMonth, otherDay, otherHour, otherMinute, otherSecond, otherMillisecond, otherMicrosecond),
_tzd(otherTzd)
{
}
LocalDateTime::LocalDateTime(double otherJulianDay):
_dateTime(otherJulianDay)
{
determineTzd(true);
}
LocalDateTime::LocalDateTime(int otherTzd, double otherJulianDay):
_dateTime(otherJulianDay),
_tzd(otherTzd)
{
adjustForTzd();
}
LocalDateTime::LocalDateTime(const DateTime& dateTime):
_dateTime(dateTime)
{
determineTzd(true);
}
LocalDateTime::LocalDateTime(int otherTzd, const DateTime& otherDateTime):
_dateTime(otherDateTime),
_tzd(otherTzd)
{
adjustForTzd();
}
LocalDateTime::LocalDateTime(int otherTzd, const DateTime& otherDateTime, bool adjust):
_dateTime(otherDateTime),
_tzd(otherTzd)
{
if (adjust)
adjustForTzd();
}
LocalDateTime::LocalDateTime(const LocalDateTime& dateTime):
_dateTime(dateTime._dateTime),
_tzd(dateTime._tzd)
{
}
LocalDateTime::LocalDateTime(Timestamp::UtcTimeVal utcTimeVal, Timestamp::TimeDiff diff, int otherTzd):
_dateTime(utcTimeVal, diff),
_tzd(otherTzd)
{
adjustForTzd();
}
LocalDateTime::~LocalDateTime()
{
}
LocalDateTime& LocalDateTime::operator = (const LocalDateTime& dateTime)
{
if (&dateTime != this)
{
_dateTime = dateTime._dateTime;
_tzd = dateTime._tzd;
}
return *this;
}
LocalDateTime& LocalDateTime::operator = (const Timestamp& otherTimestamp)
{
if (otherTimestamp != timestamp())
{
_dateTime = otherTimestamp;
determineTzd(true);
}
return *this;
}
LocalDateTime& LocalDateTime::operator = (double otherJulianDay)
{
_dateTime = otherJulianDay;
determineTzd(true);
return *this;
}
LocalDateTime& LocalDateTime::assign(int otherYear, int otherMonth, int otherDay, int otherHour, int otherMinute, int otherSecond, int otherMillisecond, int otherMicroseconds)
{
_dateTime.assign(otherYear, otherMonth, otherDay, otherHour, otherMinute, otherSecond, otherMillisecond, otherMicroseconds);
determineTzd(false);
return *this;
}
LocalDateTime& LocalDateTime::assign(int otherTzd, int otherYear, int otherMonth, int otherDay, int otherHour, int otherMinute, int otherSecond, int otherMillisecond, int otherMicroseconds)
{
_dateTime.assign(otherYear, otherMonth, otherDay, otherHour, otherMinute, otherSecond, otherMillisecond, otherMicroseconds);
_tzd = otherTzd;
return *this;
}
LocalDateTime& LocalDateTime::assign(int otherTzd, double otherJulianDay)
{
_tzd = otherTzd;
_dateTime = otherJulianDay;
adjustForTzd();
return *this;
}
void LocalDateTime::swap(LocalDateTime& dateTime)
{
_dateTime.swap(dateTime._dateTime);
std::swap(_tzd, dateTime._tzd);
}
DateTime LocalDateTime::utc() const
{
return DateTime(_dateTime.utcTime(), -((Timestamp::TimeDiff) _tzd)*Timespan::SECONDS);
}
bool LocalDateTime::operator == (const LocalDateTime& dateTime) const
{
return utcTime() == dateTime.utcTime();
}
bool LocalDateTime::operator != (const LocalDateTime& dateTime) const
{
return utcTime() != dateTime.utcTime();
}
bool LocalDateTime::operator < (const LocalDateTime& dateTime) const
{
return utcTime() < dateTime.utcTime();
}
bool LocalDateTime::operator <= (const LocalDateTime& dateTime) const
{
return utcTime() <= dateTime.utcTime();
}
bool LocalDateTime::operator > (const LocalDateTime& dateTime) const
{
return utcTime() > dateTime.utcTime();
}
bool LocalDateTime::operator >= (const LocalDateTime& dateTime) const
{
return utcTime() >= dateTime.utcTime();
}
LocalDateTime LocalDateTime::operator + (const Timespan& span) const
{
// First calculate the adjusted UTC time, then calculate the
// locally adjusted time by constructing a new LocalDateTime.
DateTime tmp(utcTime(), span.totalMicroseconds());
return LocalDateTime(tmp);
}
LocalDateTime LocalDateTime::operator - (const Timespan& span) const
{
// First calculate the adjusted UTC time, then calculate the
// locally adjusted time by constructing a new LocalDateTime.
DateTime tmp(utcTime(), -span.totalMicroseconds());
return LocalDateTime(tmp);
}
Timespan LocalDateTime::operator - (const LocalDateTime& dateTime) const
{
return Timespan((utcTime() - dateTime.utcTime())/10);
}
LocalDateTime& LocalDateTime::operator += (const Timespan& span)
{
// Use the same trick as in operator+. Create a UTC time, adjust
// it for the span, and convert back to LocalDateTime. This will
// recalculate the tzd correctly in the case where the addition
// crosses a DST boundary.
*this = DateTime(utcTime(), span.totalMicroseconds());
return *this;
}
LocalDateTime& LocalDateTime::operator -= (const Timespan& span)
{
// Use the same trick as in operator-. Create a UTC time, adjust
// it for the span, and convert back to LocalDateTime. This will
// recalculate the tzd correctly in the case where the subtraction
// crosses a DST boundary.
*this = DateTime(utcTime(), -span.totalMicroseconds());
return *this;
}
void LocalDateTime::determineTzd(bool adjust)
{
if (adjust)
{
std::time_t epochTime = _dateTime.timestamp().epochTime();
#if defined(_WIN32) || defined(POCO_NO_POSIX_TSF)
#if defined(_WIN32_WCE) && _WIN32_WCE < 0x800
std::tm* broken = wceex_localtime(&epochTime);
#else
std::tm* broken = std::localtime(&epochTime);
#endif
if (!broken) throw Poco::SystemException("cannot get local time");
_tzd = (Timezone::utcOffset() + ((broken->tm_isdst == 1) ? 3600 : 0));
#else
std::tm broken;
#if defined(POCO_VXWORKS)
if (localtime_r(&epochTime, &broken) != OK)
throw Poco::SystemException("cannot get local time");
#else
if (!localtime_r(&epochTime, &broken))
throw Poco::SystemException("cannot get local time");
#endif
_tzd = (Timezone::utcOffset() + ((broken.tm_isdst == 1) ? 3600 : 0));
#endif
adjustForTzd();
}
else
{
int dst;
dstOffset(dst);
_tzd = (Timezone::utcOffset() + dst);
}
}
std::time_t LocalDateTime::dstOffset(int& rDstOffset) const
{
std::time_t local;
std::tm broken;
broken.tm_year = (_dateTime.year() - 1900);
broken.tm_mon = (_dateTime.month() - 1);
broken.tm_mday = _dateTime.day();
broken.tm_hour = _dateTime.hour();
broken.tm_min = _dateTime.minute();
broken.tm_sec = _dateTime.second();
broken.tm_isdst = -1;
#if defined(_WIN32_WCE) && _WIN32_WCE < 0x800
local = wceex_mktime(&broken);
#else
local = std::mktime(&broken);
#endif
rDstOffset = (broken.tm_isdst == 1) ? 3600 : 0;
return local;
}
} // namespace Poco
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