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-/* xbdate.h
-
-XBase64 Software Library
-
-Copyright (c) 1997,2003,2014,2022 Gary A Kunkel
-
-The xb64 software library is covered under the terms of the GPL Version 3, 2007 license.
-
-Email Contact:
-
- XDB-devel@lists.sourceforge.net
- XDB-users@lists.sourceforge.net
-
-*/
-
-
-#ifndef __XB_XBDATE_H__
-#define __XB_XBDATE_H__
-
-#ifdef CMAKE_COMPILER_IS_GNUCC
-#pragma interface
-#endif
-
-
-namespace xb{
-
-#define XB_FMT_WEEK 1
-#define XB_FMT_MONTH 2
-#define XB_FMT_YEAR 3
-
-// next value is added to the date calculation to match dbase calculation
-// first valid dbase date is 01/01/0001
-#define JUL_OFFSET 1721425L
-
-
-//! @brief xbDate class.
-/*!
-This xbDate class handles two type of date values:<br>
-
-1) Gregorian dates with a format of CCYYMMDD. This is how dates are stored in dbf files.<br>
-2) Julian dates calculated as the number of days since 1901-01-01 + 1721425.<br>
-
-Leap Years: The routines in the class support both leap years (one every four
-years) and leap centuries (one every four hundred years.)
-
-A leap year is a year having 366 days, which can be evenly
-divisible by 4 and not by 100.<br>
-Leap centuries are years which are evenly divisible by 400.<br>
-
-From a programming perspective, Julian dates are useful for date
-arithmetic, determining the difference between two dates or calculating
-a future or past date.<br>
-
-To determine the difference between two dates, convert both dates to a
-Julian date and subtract one from the other.<br>
-
-To calculate a future or past date, convert the base date to a Julian date,
-add (or subtract) the number of days necessary to (from) it and convert the
-julian date back to a Gregorian date.
-*/
-
-class XBDLLEXPORT xbDate : public xbSsv {
- public:
-
- xbDate();
- xbDate( const char * Date8 );
- xbDate( const xbString &Date8 );
- xbDate( xbInt32 lJulDate );
- ~xbDate();
-
- void operator=( const xbDate &d );
- void operator+=( xbInt32 i );
- void operator-=( xbInt32 i );
- void operator++( xbInt32 i );
- void operator--( xbInt32 i );
-
- xbInt32 operator-( const xbDate & ) const;
- const char * operator-( xbInt32 i );
- const char * operator+( xbInt32 i );
-
- xbBool operator==( const xbDate & ) const;
- xbBool operator!=( const xbDate & ) const;
- xbBool operator< ( const xbDate & ) const;
- xbBool operator> ( const xbDate & ) const;
- xbBool operator<=( const xbDate & ) const;
- xbBool operator>=( const xbDate & ) const;
-
- xbInt16 CalcRollingCenturyForYear( xbInt16 year ) const;
- xbInt16 CenturyOf() const;
- xbInt16 CharDayOf( xbString &sOutCharDay );
- xbInt16 CharMonthOf( xbString &sOutCharMonth );
- xbBool DateIsValid ( const xbString &sDate8 ) const;
- xbInt16 DayOf( xbInt16 iFormat ) const;
- xbInt16 CTOD( const xbString &sCtodInDate );
- xbInt16 FormatDate( const xbString &sFmtIn, xbString &sFmtOut );
- const char *Str() const;
- xbBool IsLeapYear( xbInt16 iYear ) const;
- xbBool IsLeapYear() const;
- xbInt32 JulianDays() const;
- xbInt16 JulToDate8( xbInt32 lJulDate );
- xbInt16 LastDayOfMonth();
- xbInt16 MonthOf() const;
- xbInt16 Set( const xbString &Date8 );
- xbInt16 Sysdate();
- xbInt16 YearOf() const;
-
-#ifdef XB_DEBUG_SUPPORT
- void Dump( const char * title );
- void DumpDateTables();
-#endif
-
- private:
- void SetDateTables();
- xbString sDate8; /* CCYYMMDD date format ie; 20140718 */
-
- static int iAggregatedDaysInMonths[2][13];
- static int iDaysInMonths[2][13];
-};
-
-} /* namespace */
-#endif /*__XB_XBDATE_H__ */
-