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//
// DateTime.cpp
//
// Library: Foundation
// Package: DateTime
// Module: DateTime
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/DateTime.h"
#include "Poco/Timespan.h"
#include "Poco/Exception.h"
#include "Poco/Format.h"
#include <algorithm>
#include <cmath>
#include <ctime>
namespace Poco {
DateTime::DateTime()
{
Timestamp now;
_utcTime = now.utcTime();
computeGregorian(julianDay());
computeDaytime();
}
DateTime::DateTime(const tm& tmStruct):
_year(tmStruct.tm_year + 1900),
_month(tmStruct.tm_mon + 1),
_day(tmStruct.tm_mday),
_hour(tmStruct.tm_hour),
_minute(tmStruct.tm_min),
_second(tmStruct.tm_sec),
_millisecond(0),
_microsecond(0)
{
if (isValid(_year, _month, _day, _hour, _minute, _second, _millisecond, _microsecond))
{
_utcTime = toUtcTime(toJulianDay(_year, _month, _day)) + 10*(_hour*Timespan::HOURS + _minute*Timespan::MINUTES + _second*Timespan::SECONDS);
}
else
{
throw Poco::InvalidArgumentException(Poco::format("Date time is %hd-%hd-%hdT%hd:%hd:%hd.%hd.%hd\n"
"Valid values:\n"
"0 <= year <= 9999\n"
"1 <= month <= 12\n"
"1 <= day <= %d\n"
"0 <= hour <= 23\n"
"0 <= minute <= 59\n"
"0 <= second <= 60\n"
"0 <= millisecond <= 999\n"
"0 <= microsecond <= 999",
_year, _month, _day, _hour, _minute,
_second, _millisecond, _microsecond,
daysOfMonth(_year, _month)));
}
}
DateTime::DateTime(const Timestamp& timestamp):
_utcTime(timestamp.utcTime())
{
computeGregorian(julianDay());
computeDaytime();
}
DateTime::DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond):
_year(year),
_month(month),
_day(day),
_hour(hour),
_minute(minute),
_second(second),
_millisecond(millisecond),
_microsecond(microsecond)
{
if (isValid(_year, _month, _day, _hour, _minute, _second, _millisecond, _microsecond))
{
_utcTime = toUtcTime(toJulianDay(_year, _month, _day)) +
10 * (_hour * Timespan::HOURS + _minute * Timespan::MINUTES + _second * Timespan::SECONDS +
_millisecond * Timespan::MILLISECONDS + _microsecond);
}
else
{
throw Poco::InvalidArgumentException(Poco::format("Date time is %hd-%hd-%hdT%hd:%hd:%hd.%hd.%hd\n"
"Valid values:\n"
"0 <= year <= 9999\n"
"1 <= month <= 12\n"
"1 <= day <= %d\n"
"0 <= hour <= 23\n"
"0 <= minute <= 59\n"
"0 <= second <= 60\n"
"0 <= millisecond <= 999\n"
"0 <= microsecond <= 999",
_year, _month, _day, _hour, _minute,
_second, _millisecond, _microsecond,
daysOfMonth(_year, _month)));
}
}
DateTime::DateTime(double otherJulianDay):
_utcTime(toUtcTime(otherJulianDay))
{
computeGregorian(otherJulianDay);
}
DateTime::DateTime(Timestamp::UtcTimeVal otherUtcTime, Timestamp::TimeDiff diff):
_utcTime(otherUtcTime + diff*10)
{
computeGregorian(julianDay());
computeDaytime();
}
DateTime::DateTime(const DateTime& dateTime):
_utcTime(dateTime._utcTime),
_year(dateTime._year),
_month(dateTime._month),
_day(dateTime._day),
_hour(dateTime._hour),
_minute(dateTime._minute),
_second(dateTime._second),
_millisecond(dateTime._millisecond),
_microsecond(dateTime._microsecond)
{
}
DateTime::~DateTime()
{
}
DateTime& DateTime::operator = (const DateTime& dateTime)
{
if (&dateTime != this)
{
_utcTime = dateTime._utcTime;
_year = dateTime._year;
_month = dateTime._month;
_day = dateTime._day;
_hour = dateTime._hour;
_minute = dateTime._minute;
_second = dateTime._second;
_millisecond = dateTime._millisecond;
_microsecond = dateTime._microsecond;
}
return *this;
}
DateTime& DateTime::operator = (const Timestamp& otherTimestamp)
{
_utcTime = otherTimestamp.utcTime();
computeGregorian(julianDay());
computeDaytime();
return *this;
}
DateTime& DateTime::operator = (double otherJulianDay)
{
_utcTime = toUtcTime(otherJulianDay);
computeGregorian(otherJulianDay);
return *this;
}
DateTime& DateTime::assign(int otherYear, int otherMonth, int otherDay, int otherHour, int otherMinute, int otherSecond, int otherMillisecond, int otherMicrosecond)
{
if(isValid(otherYear, otherMonth, otherDay, otherHour, otherMinute, otherSecond, otherMillisecond, otherMicrosecond))
{
_utcTime = toUtcTime(toJulianDay(otherYear, otherMonth, otherDay)) + 10*(otherHour*Timespan::HOURS + otherMinute*Timespan::MINUTES + otherSecond*Timespan::SECONDS + otherMillisecond*Timespan::MILLISECONDS + otherMicrosecond);
_year = static_cast<short>(otherYear);
_month = static_cast<short>(otherMonth);
_day = static_cast<short>(otherDay);
_hour = static_cast<short>(otherHour);
_minute = static_cast<short>(otherMinute);
_second = static_cast<short>(otherSecond);
_millisecond = static_cast<short>(otherMillisecond);
_microsecond = static_cast<short>(otherMicrosecond);
}
else
{
throw Poco::InvalidArgumentException(Poco::format("Date time is %d-%d-%dT%d:%d:%d:%d:%d\n"
"Valid values:\n"
"0 <= year <= 9999\n"
"1 <= month <= 12\n"
"1 <= day <= %d\n"
"0 <= hour <= 23\n"
"0 <= minute <= 59\n"
"0 <= second <= 60\n"
"0 <= millisecond <= 999\n"
"0 <= microsecond <= 999",
_year, _month, _day, _hour, _minute,
_second, _millisecond, _microsecond,
daysOfMonth(_year, _month)));
}
return *this;
}
void DateTime::swap(DateTime& dateTime)
{
std::swap(_utcTime, dateTime._utcTime);
std::swap(_year, dateTime._year);
std::swap(_month, dateTime._month);
std::swap(_day, dateTime._day);
std::swap(_hour, dateTime._hour);
std::swap(_minute, dateTime._minute);
std::swap(_second, dateTime._second);
std::swap(_millisecond, dateTime._millisecond);
std::swap(_microsecond, dateTime._microsecond);
}
int DateTime::dayOfWeek() const
{
return int((std::floor(julianDay() + 1.5))) % 7;
}
int DateTime::dayOfYear() const
{
int doy = 0;
for (int currentMonth = 1; currentMonth < _month; ++currentMonth)
doy += daysOfMonth(_year, currentMonth);
doy += _day;
return doy;
}
int DateTime::daysOfMonth(int year, int month)
{
poco_assert (month >= 1 && month <= 12);
static int daysOfMonthTable[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
if (month == 2 && isLeapYear(year))
return 29;
else
return daysOfMonthTable[month];
}
bool DateTime::isValid(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond)
{
return
(year >= 0 && year <= 9999) &&
(month >= 1 && month <= 12) &&
(day >= 1 && day <= daysOfMonth(year, month)) &&
(hour >= 0 && hour <= 23) &&
(minute >= 0 && minute <= 59) &&
(second >= 0 && second <= 60) &&
(millisecond >= 0 && millisecond <= 999) &&
(microsecond >= 0 && microsecond <= 999);
}
int DateTime::week(int firstDayOfWeek) const
{
poco_assert (firstDayOfWeek >= 0 && firstDayOfWeek <= 6);
/// find the first firstDayOfWeek.
int baseDay = 1;
while (DateTime(_year, 1, baseDay).dayOfWeek() != firstDayOfWeek) ++baseDay;
int doy = dayOfYear();
int offs = baseDay <= 4 ? 0 : 1;
if (doy < baseDay)
return offs;
else
return (doy - baseDay)/7 + 1 + offs;
}
double DateTime::julianDay() const
{
return toJulianDay(_utcTime);
}
DateTime DateTime::operator + (const Timespan& span) const
{
return DateTime(_utcTime, span.totalMicroseconds());
}
DateTime DateTime::operator - (const Timespan& span) const
{
return DateTime(_utcTime, -span.totalMicroseconds());
}
Timespan DateTime::operator - (const DateTime& dateTime) const
{
return Timespan((_utcTime - dateTime._utcTime)/10);
}
DateTime& DateTime::operator += (const Timespan& span)
{
_utcTime += span.totalMicroseconds()*10;
computeGregorian(julianDay());
computeDaytime();
return *this;
}
DateTime& DateTime::operator -= (const Timespan& span)
{
_utcTime -= span.totalMicroseconds()*10;
computeGregorian(julianDay());
computeDaytime();
return *this;
}
tm DateTime::makeTM() const
{
tm tmStruct;
tmStruct.tm_sec = _second;
tmStruct.tm_min = _minute;
tmStruct.tm_hour = _hour;
tmStruct.tm_mday = _day;
poco_assert (_month > 0);
tmStruct.tm_mon = _month - 1;
poco_assert (_year >= 1900);
tmStruct.tm_year = _year - 1900;
tmStruct.tm_wday = dayOfWeek();
int doy = dayOfYear();
poco_assert (_year >0);
tmStruct.tm_yday = doy - 1;
tmStruct.tm_isdst = -1;
return tmStruct;
}
void DateTime::makeUTC(int tzd)
{
operator -= (Timespan(((Timestamp::TimeDiff) tzd)*Timespan::SECONDS));
}
void DateTime::makeLocal(int tzd)
{
operator += (Timespan(((Timestamp::TimeDiff) tzd)*Timespan::SECONDS));
}
double DateTime::toJulianDay(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond)
{
// lookup table for (153*month - 457)/5 - note that 3 <= month <= 14.
static int lookup[] = {-91, -60, -30, 0, 31, 61, 92, 122, 153, 184, 214, 245, 275, 306, 337};
// day to double
double dday = double(day) + ((double((hour*60 + minute)*60 + second)*1000 + millisecond)*1000 + microsecond)/86400000000.0;
if (month < 3)
{
month += 12;
--year;
}
double dyear = double(year);
return dday + lookup[month] + 365*year + std::floor(dyear/4) - std::floor(dyear/100) + std::floor(dyear/400) + 1721118.5;
}
void DateTime::checkLimit(short& lower, short& higher, short limit)
{
if (lower >= limit)
{
higher += short(lower / limit);
lower = short(lower % limit);
}
}
void DateTime::normalize()
{
checkLimit(_microsecond, _millisecond, 1000);
checkLimit(_millisecond, _second, 1000);
checkLimit(_second, _minute, 60);
checkLimit(_minute, _hour, 60);
checkLimit(_hour, _day, 24);
if (_day > daysOfMonth(_year, _month))
{
_day -= static_cast<short>(daysOfMonth(_year, _month));
if (++_month > 12)
{
++_year;
_month -= 12;
}
}
}
void DateTime::computeGregorian(double otherJulianDay)
{
double z = std::floor(otherJulianDay - 1721118.5);
double r = otherJulianDay - 1721118.5 - z;
double g = z - 0.25;
double a = std::floor(g / 36524.25);
double b = a - std::floor(a/4);
_year = short(std::floor((b + g)/365.25));
double c = b + z - std::floor(365.25*_year);
_month = short(std::floor((5*c + 456)/153));
double dday = c - std::floor((153.0*_month - 457)/5) + r;
_day = short(dday);
if (_month > 12)
{
++_year;
_month -= 12;
}
r *= 24;
_hour = short(std::floor(r));
r -= std::floor(r);
r *= 60;
_minute = short(std::floor(r));
r -= std::floor(r);
r *= 60;
_second = short(std::floor(r));
r -= std::floor(r);
r *= 1000;
_millisecond = short(std::floor(r));
r -= std::floor(r);
r *= 1000;
_microsecond = short(r + 0.5);
normalize();
poco_assert_dbg (_month >= 1 && _month <= 12);
poco_assert_dbg (_day >= 1 && _day <= daysOfMonth(_year, _month));
poco_assert_dbg (_hour >= 0 && _hour <= 23);
poco_assert_dbg (_minute >= 0 && _minute <= 59);
poco_assert_dbg (_second >= 0 && _second <= 59);
poco_assert_dbg (_millisecond >= 0 && _millisecond <= 999);
poco_assert_dbg (_microsecond >= 0 && _microsecond <= 999);
}
void DateTime::computeDaytime()
{
Timespan span(_utcTime/10);
int spanHour = span.hours();
// Due to double rounding issues, the previous call to computeGregorian()
// may have crossed into the next or previous day. We need to correct that.
if (spanHour == 23 && _hour == 0)
{
_day--;
if (_day == 0)
{
_month--;
if (_month == 0)
{
_month = 12;
_year--;
}
_day = static_cast<short>(daysOfMonth(_year, _month));
}
}
else if (spanHour == 0 && _hour == 23)
{
_day++;
if (_day > daysOfMonth(_year, _month))
{
_month++;
if (_month > 12)
{
_month = 1;
_year++;
}
_day = 1;
}
}
_hour = static_cast<short>(spanHour);
_minute = static_cast<short>(span.minutes());
_second = static_cast<short>(span.seconds());
_millisecond = static_cast<short>(span.milliseconds());
_microsecond = static_cast<short>(span.microseconds());
}
} // namespace Poco
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