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       1             : #ifndef GREG_DATE_HPP___
       2             : #define GREG_DATE_HPP___
       3             : 
       4             : /* Copyright (c) 2002,2003, 2020 CrystalClear Software, Inc.
       5             :  * Use, modification and distribution is subject to the
       6             :  * Boost Software License, Version 1.0. (See accompanying
       7             :  * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
       8             :  * Author: Jeff Garland
       9             :  * $Date$
      10             :  */
      11             : 
      12             : #include <boost/throw_exception.hpp>
      13             : #include <boost/date_time/compiler_config.hpp>
      14             : #include <boost/date_time/date.hpp>
      15             : #include <boost/date_time/special_defs.hpp>
      16             : #include <boost/date_time/gregorian/greg_calendar.hpp>
      17             : #include <boost/date_time/gregorian/greg_duration.hpp>
      18             : 
      19             : namespace boost {
      20             : namespace gregorian {
      21             : 
      22             :   //bring special enum values into the namespace
      23             :   using date_time::special_values;
      24             :   using date_time::not_special;
      25             :   using date_time::neg_infin;
      26             :   using date_time::pos_infin;
      27             :   using date_time::not_a_date_time;
      28             :   using date_time::max_date_time;
      29             :   using date_time::min_date_time;
      30             : 
      31             :   //! A date type based on gregorian_calendar
      32             :   /*! This class is the primary interface for programming with
      33             :       greogorian dates.  The is a lightweight type that can be
      34             :       freely passed by value.  All comparison operators are
      35             :       supported.
      36             :       \ingroup date_basics
      37             :   */
      38             :   class BOOST_SYMBOL_VISIBLE date : public date_time::date<date, gregorian_calendar, date_duration>
      39             :   {
      40             :    public:
      41             :     typedef gregorian_calendar::year_type year_type;
      42             :     typedef gregorian_calendar::month_type month_type;
      43             :     typedef gregorian_calendar::day_type day_type;
      44             :     typedef gregorian_calendar::day_of_year_type day_of_year_type;
      45             :     typedef gregorian_calendar::ymd_type ymd_type;
      46             :     typedef gregorian_calendar::date_rep_type date_rep_type;
      47             :     typedef gregorian_calendar::date_int_type date_int_type;
      48             :     typedef date_duration  duration_type;
      49             : #if !defined(DATE_TIME_NO_DEFAULT_CONSTRUCTOR)
      50             :     //! Default constructor constructs with not_a_date_time
      51             :     BOOST_CXX14_CONSTEXPR date():
      52             :       date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(not_a_date_time))
      53             :     {}
      54             : #endif // DATE_TIME_NO_DEFAULT_CONSTRUCTOR
      55             :     //! Main constructor with year, month, day
      56          16 :     BOOST_CXX14_CONSTEXPR date(year_type y, month_type m, day_type d)
      57           8 :       : date_time::date<date, gregorian_calendar, date_duration>(y, m, d)
      58           8 :     {
      59           8 :       if (gregorian_calendar::end_of_month_day(y, m) < d) {
      60           0 :         boost::throw_exception(bad_day_of_month(std::string("Day of month is not valid for year")));
      61             :       }
      62          16 :     }
      63             :     //! Constructor from a ymd_type structure
      64             :     BOOST_CXX14_CONSTEXPR explicit date(const ymd_type& ymd)
      65             :       : date_time::date<date, gregorian_calendar, date_duration>(ymd)
      66             :     {}
      67             :     //! Needed copy constructor
      68             :     BOOST_CXX14_CONSTEXPR explicit date(const date_int_type& rhs):
      69             :       date_time::date<date,gregorian_calendar, date_duration>(rhs)
      70             :     {}
      71             :     //! Needed copy constructor
      72           0 :     BOOST_CXX14_CONSTEXPR explicit date(date_rep_type rhs):
      73           0 :       date_time::date<date,gregorian_calendar, date_duration>(rhs)
      74           0 :     {}
      75             :     //! Constructor for infinities, not a date, max and min date
      76          24 :     BOOST_CXX14_CONSTEXPR explicit date(special_values sv):
      77          12 :       date_time::date<date, gregorian_calendar, date_duration>(from_special_adjusted(sv))
      78          24 :     {}
      79             :     //!Return the Julian Day number for the date.
      80             :     BOOST_CXX14_CONSTEXPR date_int_type julian_day() const
      81             :     {
      82             :       ymd_type ymd = year_month_day();
      83             :       return gregorian_calendar::julian_day_number(ymd);
      84             :     }
      85             :     //!Return the day of year 1..365 or 1..366 (for leap year)
      86             :     BOOST_CXX14_CONSTEXPR day_of_year_type day_of_year() const
      87             :     {
      88             :       date start_of_year(year(), 1, 1);
      89             :       unsigned short doy = static_cast<unsigned short>((*this-start_of_year).days() + 1);
      90             :       return day_of_year_type(doy);
      91             :     }
      92             :     //!Return the Modified Julian Day number for the date.
      93             :     BOOST_CXX14_CONSTEXPR date_int_type modjulian_day() const
      94             :     {
      95             :       ymd_type ymd = year_month_day();
      96             :       return gregorian_calendar::modjulian_day_number(ymd);
      97             :     }
      98             :     //!Return the ISO 8601 week number 1..53
      99             :     BOOST_CXX14_CONSTEXPR int week_number() const
     100             :     {
     101             :       ymd_type ymd = year_month_day();
     102             :       return gregorian_calendar::week_number(ymd);
     103             :     }
     104             :     //! Return the day number from the calendar
     105           8 :     BOOST_CXX14_CONSTEXPR date_int_type day_number() const
     106             :     {
     107           8 :       return days_;
     108             :     }
     109             :     //! Return the last day of the current month
     110             :     BOOST_CXX14_CONSTEXPR date end_of_month() const
     111             :     {
     112             :       ymd_type ymd = year_month_day();
     113             :       unsigned short eom_day =  gregorian_calendar::end_of_month_day(ymd.year, ymd.month);
     114             :       return date(ymd.year, ymd.month, eom_day);
     115             :     }
     116             : 
     117             :     friend BOOST_CXX14_CONSTEXPR
     118             :     bool operator==(const date& lhs, const date& rhs);
     119             : 
     120             :    private:
     121             : 
     122          12 :     BOOST_CXX14_CONSTEXPR date_rep_type from_special_adjusted(special_values sv)
     123             :     {
     124          12 :       switch (sv)
     125             :       {
     126           0 :         case min_date_time: return gregorian_calendar::day_number(ymd_type(1400, 1, 1));
     127           0 :         case max_date_time: return gregorian_calendar::day_number(ymd_type(9999, 12, 31));
     128          12 :         default: return date_rep_type::from_special(sv);
     129             :       }
     130          12 :     }
     131             :   };
     132             : 
     133             :   inline BOOST_CXX14_CONSTEXPR
     134             :   bool operator==(const date& lhs, const date& rhs)
     135             :   {
     136             :     return lhs.days_ == rhs.days_;
     137             :   }
     138             : 
     139             : 
     140             : } } //namespace gregorian
     141             : 
     142             : 
     143             : 
     144             : #endif