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Date.h

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//  ======================================================================== //
//                                                                           //
//    File      : Date.h                                                     //
//    Purpose   :                                                            //
//    Time-stamp: <Wed Dec/26/2001 14:02 MET Coder@ReallySoft.de>            //
//                                                                           //
//    (C) December 2001 by Ralf Westram                                      //
//                                                                           //
//    Permission to use, copy, modify, distribute and sell this software     //
//    and its documentation for any purpose is hereby granted without fee,   //
//    provided that the above copyright notice appear in all copies and      //
//    that both that copyright notice and this permission notice appear      //
//    in supporting documentation.                                           //
//                                                                           //
//    Ralf Westram makes no representations about the suitability of this    //
//    software for any purpose.  It is provided "as is" without express or   //
//    implied warranty.                                                      //
//                                                                           //
//  ======================================================================== //

#ifndef DATE_H
#define DATE_H

#ifndef CTIME
#include <ctime>
#endif

namespace rs {

    namespace date {

        // --------------------
        //      class Date
        // --------------------
        class Date {
        private:
            std::time_t time;
            std::tm     date;
            bool        valid;

            void init(const std::time_t& time_);
            void init(const std::tm& date_);
            void init(int day, int month, int year);

            void correct();

        public:
            Date() { std::time(&time); init(time); }

            Date(int day_, int month_, int year_) { init(day_, month_, year_); }

            Date(const std::tm& date_) { init(date_); }

            Date(const Date& other) {
                time  = other.time;
                date  = other.date;
                valid = other.valid;
            }

            Date& operator = (const Date& other) {
                if (&other != this) {
                    time  = other.time;
                    date  = other.date;
                    valid = other.valid;
                }
                return *this;
            }

            virtual ~Date() {}

            bool is_valid() const { return valid; }

            const std::tm& get_Date() const { return date; }

            int is_Feiertag() const;

            void inc(int offset = 1) { date.tm_mday += offset; correct(); }
            void dec(int offset = 1) { date.tm_mday -= offset; correct(); }

            int year() const { return get_Date().tm_year+1900; }
            int month() const { return get_Date().tm_mon+1; }
            int day() const { return get_Date().tm_mday; }

            int dayOfWeek() const { return get_Date().tm_wday; }
        };

        // some useful date functions :

        inline bool is_leap_year(int year) { return Date(29, 2, year).is_valid(); }

        const char *name_of_Feiertag(int feiertag_idx);

        bool is_catholic(int feiertag_idx);

    }; // end of namespace date
}; // end of namespace rs

#else
#error Date.h included twice
#endif // DATE_H

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