rubidium@9825: /* $Id$ */
rubidium@9825: 
truebrain@9829: /** @file ai_date.hpp Everything to query and manipulate date related information. */
rubidium@9825: 
rubidium@9825: #ifndef AI_DATE_HPP
rubidium@9825: #define AI_DATE_HPP
rubidium@9825: 
rubidium@9825: #include "ai_object.hpp"
rubidium@9825: 
rubidium@9825: /**
rubidium@9825:  * Class that handles all date related (calculation) functions.
rubidium@9825:  *
rubidium@9825:  * @note Months and days of month are 1-based; the first month of the
rubidium@9825:  *       year is 1 and the first day of the month is also 1.
rubidium@9825:  * @note Years are zero based; they start with the year 0.
rubidium@9825:  * @note Dates can be used to determine the number of days between
rubidium@9825:  *       two different moments in time because they count the number
rubidium@9825:  *       of days since the year 0.
rubidium@9825:  */
rubidium@9825: class AIDate : public AIObject {
rubidium@9825: public:
rubidium@9825: 	static const char *GetClassName() { return "AIDate"; }
rubidium@9825: 
rubidium@9825: 	/**
rubidium@9825: 	 * Get the current date.
rubidium@9825: 	 * This is the number of days since epoch under the assumption that
truebrain@9835: 	 *  there is a leap year every 4 years, except when dividable by
truebrain@9835: 	 *  100 but not by 400.
truebrain@9835: 	 * @return The current date.
rubidium@9825: 	 */
rubidium@9825: 	static int32 GetCurrentDate();
rubidium@9825: 
rubidium@9825: 	/**
rubidium@9825: 	 * Get the year of the given date.
truebrain@9835: 	 * @param date The date to get the year of.
truebrain@9835: 	 * @return The year.
rubidium@9825: 	 */
rubidium@9825: 	static int32 GetYear(int32 date);
rubidium@9825: 
rubidium@9825: 	/**
rubidium@9825: 	 * Get the month of the given date.
truebrain@9835: 	 * @param date The date to get the month of.
truebrain@9835: 	 * @return The month.
rubidium@9825: 	 */
rubidium@9825: 	static int32 GetMonth(int32 date);
rubidium@9825: 
rubidium@9825: 	/**
rubidium@9825: 	 * Get the day (of the month) of the given date.
truebrain@9835: 	 * @param date The date to get the day of.
truebrain@9835: 	 * @return The day.
rubidium@9825: 	 */
rubidium@9825: 	static int32 GetDayOfMonth(int32 date);
rubidium@9825: 
rubidium@9825: 	/**
rubidium@9825: 	 * Get the date given a year, month and day of month.
truebrain@9835: 	 * @param year The year of the to-be determined date.
truebrain@9835: 	 * @param month The month of the to-be determined date.
truebrain@9835: 	 * @param day_of_month The day of month of the to-be determined date.
truebrain@9835: 	 * @return The date.
rubidium@9825: 	 */
rubidium@9825: 	static int32 GetDate(int32 year, int32 month, int32 day_of_month);
rubidium@9825: };
rubidium@9825: 
rubidium@9825: #endif /* AI_DATE_HPP */