Date Class Reference

Represents Date Data type. More...

#include <DataType.h>

Public Member Functions
	Date ()
	Date (JulianRep julian)
	Date (int year, int month, int day)
	constructor with year, month, day
	Date (const Date &d2)
Date &	operator= (const Date &d2)
int	set (int year, int month, int day)
	sets the date with specified year, month, day
int	set (const struct tm *tmptr)
int	get (int &year, int &month, int &day) const
	get year, month, day of the date
bool	isValid () const
	checks for the validity of the date
void	setNull ()
	resets the date to zero
int	dayOfWeek () const
	returns day of the week
const char *	dayOfWeekName () const
	returns day of the week.
const char *	dayOfWeekAbbr () const
	returns day of the week abbreviation values are "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
int	dayOfMonth () const
	returns the day of the month.
int	dayOfYear () const
int	month () const
	returns the month Values are 1 to 12.
const char *	monthName () const
	returns the month name values are "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
const char *	monthAbbr () const
	returns the month name abbreviation values are "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
int	parseFrom (const char *s)
	parses the date string passed and stores it It should of the format "mm/dd/yyyy"
Date &	operator++ ()
Date &	operator-- ()
Date &	operator+= (int days)
Date &	operator-= (int days)
int	year () const
	returns the year
Static Public Member Functions
static const char *	dayOfWeekName (int day)
	returns day of the week.
static const char *	dayOfWeekAbbr (int day)
	returns day of the week abbreviation values are "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
static int	dayOfWeek (JulianRep juldate)
static const char *	monthName (int month)
	returns the month name values are "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
static const char *	monthAbbr (int month)
	returns the month name abbreviation values are "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
static bool	isValidDate (int year, int month, int day)
	checks for the validity of the date
static bool	isLeapYear (int year)
	checks for leap year
static int	daysInMonth (int month, int year)
	returns the number of days in the specified month of the year.
static int	YMDToJulian (int year, int mon, int day, JulianRep &julian)
static int	julianToYMD (JulianRep julian, int &year, int &month, int &day)
Friends
Date	operator+ (const Date &d1, int days)
Date	operator+ (int days, const Date &d1)
Date	operator- (const Date &d1, int days)
int	operator- (const Date &d1, const Date &d2)
int	operator< (const Date &d1, const Date &d2)
int	operator> (const Date &d1, const Date &d2)
int	operator<= (const Date &d1, const Date &d2)
int	operator>= (const Date &d1, const Date &d2)
int	operator== (const Date &d1, const Date &d2)
int	operator!= (const Date &d1, const Date &d2)

---

Detailed Description

Represents Date Data type.

Author:

Prabakaran Thirumalai

Definition at line 191 of file DataType.h.

---

Constructor & Destructor Documentation

Date::Date

(

)

[inline]

Definition at line 194 of file DataType.h.

{julianDate = 0;}

Date::Date

(

JulianRep

julian

)

[inline]

Definition at line 195 of file DataType.h.

: julianDate(julian) {}

Date::Date	(	int	year,
		int	month,
		int	day
	)

constructor with year, month, day

Parameters:

	year	year
	month	month
	day	day

Definition at line 21 of file DataType.cxx.

References YMDToJulian().

    { YMDToJulian(year, month, day, julianDate); }

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Date::Date

(

const Date &

d2

)

[inline]

Definition at line 204 of file DataType.h.

References julianDate.

{ julianDate = d2.julianDate; }

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Member Function Documentation

int Date::dayOfMonth

(

)

const

returns the day of the month.

Values are 1 to 31

Definition at line 41 of file DataType.cxx.

References get(), month(), and year().

Referenced by AllDataType::convertToString(), TimeStamp::dayOfMonth(), SqlOdbcStatement::execute(), Java_csql_jdbc_JSqlStatement_getDate(), and AllDataType::printVal().

                           {
    int year, month, day;
    get(year,month,day);
    return day;
}

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int Date::dayOfWeek

(

JulianRep

juldate

)

[static]

Definition at line 176 of file DataType.cxx.

                                 {
    return (int)((jul+1)%7+1);
}

int Date::dayOfWeek

(

)

const

returns day of the week

Definition at line 57 of file DataType.cxx.

Referenced by TimeStamp::dayOfWeek(), dayOfWeekAbbr(), and dayOfWeekName().

{ return dayOfWeek(julianDate); }

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const char * Date::dayOfWeekAbbr

(

int

day

)

[static]

returns day of the week abbreviation values are "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"

Definition at line 92 of file DataType.cxx.

References day_abbrs.

    { return (day < 1 || day > 7) ? 0 : day_abbrs[day-1]; }

const char * Date::dayOfWeekAbbr

(

)

const

returns day of the week abbreviation values are "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"

Definition at line 62 of file DataType.cxx.

References dayOfWeek().

Referenced by TimeStamp::dayOfWeekAbbr().

    { return dayOfWeekAbbr(dayOfWeek(julianDate)); }

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const char * Date::dayOfWeekName

(

int

day

)

[static]

returns day of the week.

values are "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday".

Definition at line 89 of file DataType.cxx.

References day_names.

    { return (day < 1 || day > 7) ? 0 : day_names[day-1]; }

const char * Date::dayOfWeekName

(

)

const

returns day of the week.

values are "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday".

Definition at line 59 of file DataType.cxx.

References dayOfWeek().

Referenced by TimeStamp::dayOfWeekName().

    { return dayOfWeekName(dayOfWeek(julianDate)); }

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int Date::dayOfYear

(

)

const

Definition at line 132 of file DataType.cxx.

References daysBeforeMonth, get(), isLeapYear(), month(), and year().

Referenced by TimeStamp::dayOfYear().

                          {
    int year,month,day;
    get(year,month,day);
    int tmp = daysBeforeMonth[month-1];
    if (month >= 3 && isLeapYear(year))
        tmp++;
    return tmp + day;
}

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int Date::daysInMonth	(	int	month,
		int	year
	)			[static]

returns the number of days in the specified month of the year.

Definition at line 141 of file DataType.cxx.

References days_per_month, and isLeapYear().

Referenced by isValidDate().

                                         {
    --month;
    int tmp = days_per_month[month];
    if (month == 1 && isLeapYear(year)) tmp++;
    return tmp;
}

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int Date::get	(	int &	year,
		int &	month,
		int &	day
	)			const

get year, month, day of the date

Parameters:

	year	year IN
	month	month IN
	day	day IN

Definition at line 25 of file DataType.cxx.

References julianToYMD().

Referenced by dayOfMonth(), dayOfYear(), TimeStamp::getDate(), month(), and year().

    { return julianToYMD(julianDate,year,month,day); }

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bool Date::isLeapYear

(

int

year

)

[static]

checks for leap year

Definition at line 127 of file DataType.cxx.

Referenced by dayOfYear(), and daysInMonth().

{
    return (year % 400 == 0) || ((year % 4 == 0) && !(year % 100 == 0));
}

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bool Date::isValid

(

)

const

checks for the validity of the date

Definition at line 124 of file DataType.cxx.

References SmallestValJulDate.

Referenced by TimeStamp::isValid().

    { return julianDate >= SmallestValJulDate; }

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bool Date::isValidDate	(	int	year,
		int	month,
		int	day
	)			[static]

checks for the validity of the date

Definition at line 148 of file DataType.cxx.

References daysInMonth().

Referenced by TimeStamp::parseFrom(), parseFrom(), and YMDToJulian().

                                                   {
    if (year  < 1 || year  > 10000) return false;
    if (month < 1 || month > 12) return false;
    return (day >= 1) && (day <= daysInMonth(month,year));
}

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int Date::julianToYMD	(	JulianRep	julian,
		int &	year,
		int &	month,
		int &	day
	)			[static]

Definition at line 180 of file DataType.cxx.

References SmallestValJulDate.

Referenced by get().

                                                                    {
    int j = jul;
    int d, m, y;

    if (j < SmallestValJulDate)
        { year = month = day = 0; return -1; }

    j -= 1721119;
    y = (4 * j - 1)/146097;
    j = 4 * j - 1 - 146097 * y;
    d = j/4;
    j = (4 * d + 3)/1461;
    d = 4 * d + 3 - 1461 * j;
    d = (d + 4)/4;
    m = (5 * d - 3)/153;
    d = 5 * d - 3 - 153 * m;
    d = (d + 5) / 5;
    y = 100 * y + j;
    if (m < 10) m += 3;
    else { m -= 9; ++y; }
    month = m;
    day = d;
    year = y;
    return 0;
}

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int Date::month

(

)

const

returns the month Values are 1 to 12.

Definition at line 46 of file DataType.cxx.

References get(), and year().

Referenced by AllDataType::convertToString(), dayOfMonth(), dayOfYear(), SqlOdbcStatement::execute(), Java_csql_jdbc_JSqlStatement_getDate(), TimeStamp::month(), monthAbbr(), monthName(), parseFrom(), AllDataType::printVal(), and year().

                      {
    int year, month, day;
    get(year,month,day);
    return month;
}

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const char * Date::monthAbbr

(

int

month

)

[static]

returns the month name abbreviation values are "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"

Definition at line 99 of file DataType.cxx.

References month_abbrs.

    { return (month < 1 || month > 12) ? 0 : month_abbrs[month-1]; }

const char * Date::monthAbbr

(

)

const

returns the month name abbreviation values are "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"

Definition at line 96 of file DataType.cxx.

References month().

Referenced by TimeStamp::monthAbbr().

{ return monthAbbr(month()); }

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const char * Date::monthName

(

int

month

)

[static]

returns the month name values are "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"

Definition at line 97 of file DataType.cxx.

References month_names.

    { return (month < 1 || month > 12) ? 0 : month_names[month-1]; }

const char * Date::monthName

(

)

const

returns the month name values are "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"

Definition at line 95 of file DataType.cxx.

References month().

Referenced by TimeStamp::monthName().

{ return monthName(month()); }

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Date& Date::operator++

(

)

[inline]

Definition at line 298 of file DataType.h.

{ julianDate++; return *this; }

Date& Date::operator+=

(

int

days

)

[inline]

Definition at line 301 of file DataType.h.

{ julianDate += days; return *this;}

Date& Date::operator--

(

)

[inline]

Definition at line 299 of file DataType.h.

{ julianDate--; return *this; }

Date& Date::operator-=

(

int

days

)

[inline]

Definition at line 302 of file DataType.h.

{ julianDate -= days; return *this;}

Date& Date::operator=

(

const Date &

d2

)

[inline]

Definition at line 205 of file DataType.h.

References julianDate.

        { julianDate=d2.julianDate; return *this; }

int Date::parseFrom

(

const char *

s

)

parses the date string passed and stores it It should of the format "mm/dd/yyyy"

Definition at line 28 of file DataType.cxx.

References isValidDate(), month(), set(), and year().

Referenced by AllDataType::convertToDate(), and TimeStamp::parseDateFrom().

                                 {
    int month,day,year;
    int count;
    count = sscanf(s,"%d/%d/%d",&year,&month,&day);
    if (count < 3) return -1;

    if (year < 100) year += 1900;

    if (!isValidDate(year, month, day))
        return -1;
    return set(year,month,day);
}

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int Date::set

(

const struct tm *

tmptr

)

int Date::set	(	int	year,
		int	month,
		int	day
	)

sets the date with specified year, month, day

Parameters:

	year	year
	month	month
	day	day

Definition at line 23 of file DataType.cxx.

References YMDToJulian().

Referenced by copyFromOdbc(), SqlOdbcStatement::fetch(), SqlOdbcStatement::fetchAndPrint(), CacheTableLoader::load(), parseFrom(), and TimeStamp::setDate().

    { return YMDToJulian(year,month,day,julianDate); }

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void Date::setNull

(

)

[inline]

resets the date to zero

Definition at line 229 of file DataType.h.

Referenced by TimeStamp::setNull().

{ julianDate = 0;}

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int Date::year

(

)

const

returns the year

Definition at line 51 of file DataType.cxx.

References get(), and month().

Referenced by AllDataType::convertToString(), dayOfMonth(), dayOfYear(), SqlOdbcStatement::execute(), Java_csql_jdbc_JSqlStatement_getDate(), month(), parseFrom(), AllDataType::printVal(), and TimeStamp::year().

                     {
    int year, month, day;
    get(year,month,day);
    return year;
}

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int Date::YMDToJulian	(	int	year,
		int	mon,
		int	day,
		JulianRep &	julian
	)			[static]

Definition at line 155 of file DataType.cxx.

References isValidDate().

Referenced by Date(), and set().

                                                                {
    if (!isValidDate(year, mon, day))
        { jul = (JulianRep)0; return -1; }

    // year, month, day are assumed to be valid
    int m = mon, d = day, y = year;
    int c, ya, j;

    if (m > 2) m -= 3;
    else { m += 9; --y; }
    c = y/100;
    ya = y - (100 * c);
    j = (146097*c)/4 + (1461*ya)/4 + (153*m+2)/5 + d + 1721119;
    jul = (JulianRep)j;
    return 0;
}

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Friends And Related Function Documentation

int operator!=	(	const Date &	d1,
		const Date &	d2
	)			[friend]

Definition at line 121 of file DataType.cxx.

    { return d1.julianDate != d2.julianDate; }

Date operator+	(	int	days,
		const Date &	d1
	)			[friend]

Definition at line 103 of file DataType.cxx.

    { return Date(d1.julianDate + days); }

Date operator+	(	const Date &	d1,
		int	days
	)			[friend]

Definition at line 101 of file DataType.cxx.

    { return Date(d1.julianDate + days); }

int operator-	(	const Date &	d1,
		const Date &	d2
	)			[friend]

Definition at line 108 of file DataType.cxx.

    { return d1.julianDate - d2.julianDate; }

Date operator-	(	const Date &	d1,
		int	days
	)			[friend]

Definition at line 105 of file DataType.cxx.

    { return Date(d1.julianDate - days); }

int operator<	(	const Date &	d1,
		const Date &	d2
	)			[friend]

Definition at line 111 of file DataType.cxx.

    { return d1.julianDate < d2.julianDate; }

int operator<=	(	const Date &	d1,
		const Date &	d2
	)			[friend]

Definition at line 115 of file DataType.cxx.

    { return d1.julianDate <= d2.julianDate; }

int operator==	(	const Date &	d1,
		const Date &	d2
	)			[friend]

Definition at line 119 of file DataType.cxx.

    { return d1.julianDate == d2.julianDate; }

int operator>	(	const Date &	d1,
		const Date &	d2
	)			[friend]

Definition at line 113 of file DataType.cxx.

    { return d1.julianDate > d2.julianDate; }

int operator>=	(	const Date &	d1,
		const Date &	d2
	)			[friend]

Definition at line 117 of file DataType.cxx.

    { return d1.julianDate >= d2.julianDate; }

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The documentation for this class was generated from the following files:

• include/DataType.h
• src/server/DataType.cxx

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