ceph/src/boost/boost/date_time/gregorian/greg_date.hpp

   1 #ifndef GREG_DATE_HPP___
   2 #define GREG_DATE_HPP___
   3
   4 /* Copyright (c) 2002,2003 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     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     date(year_type y, month_type m, day_type d)
  57       : date_time::date<date, gregorian_calendar, date_duration>(y, m, d)
  58     {
  59       if (gregorian_calendar::end_of_month_day(y, m) < d) {
  60         boost::throw_exception(bad_day_of_month(std::string("Day of month is not valid for year")));
  61       }
  62     }
  63     //! Constructor from a ymd_type structure
  64     explicit date(const ymd_type& ymd)
  65       : date_time::date<date, gregorian_calendar, date_duration>(ymd)
  66     {}
  67     //! Needed copy constructor
  68     explicit date(const date_int_type& rhs):
  69       date_time::date<date,gregorian_calendar, date_duration>(rhs)
  70     {}
  71     //! Needed copy constructor
  72     explicit date(date_rep_type rhs):
  73       date_time::date<date,gregorian_calendar, date_duration>(rhs)
  74     {}
  75     //! Constructor for infinities, not a date, max and min date
  76     explicit date(special_values sv):
  77       date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(sv))
  78     {
  79       if (sv == min_date_time)
  80       {
  81         *this = date(1400, 1, 1);
  82       }
  83       if (sv == max_date_time)
  84       {
  85         *this = date(9999, 12, 31);
  86       }
  87
  88     }
  89     //!Return the Julian Day number for the date.
  90     date_int_type julian_day() const
  91     {
  92       ymd_type ymd = year_month_day();
  93       return gregorian_calendar::julian_day_number(ymd);
  94     }
  95     //!Return the day of year 1..365 or 1..366 (for leap year)
  96     day_of_year_type day_of_year() const
  97     {
  98       date start_of_year(year(), 1, 1);
  99       unsigned short doy = static_cast<unsigned short>((*this-start_of_year).days() + 1);
 100       return day_of_year_type(doy);
 101     }
 102     //!Return the Modified Julian Day number for the date.
 103     date_int_type modjulian_day() const
 104     {
 105       ymd_type ymd = year_month_day();
 106       return gregorian_calendar::modjulian_day_number(ymd);
 107     }
 108     //!Return the iso 8601 week number 1..53
 109     int week_number() const
 110     {
 111       ymd_type ymd = year_month_day();
 112       return gregorian_calendar::week_number(ymd);
 113     }
 114     //! Return the day number from the calendar
 115     date_int_type day_number() const
 116     {
 117       return days_;
 118     }
 119     //! Return the last day of the current month
 120     date end_of_month() const
 121     {
 122       ymd_type ymd = year_month_day();
 123       short eom_day =  gregorian_calendar::end_of_month_day(ymd.year, ymd.month);
 124       return date(ymd.year, ymd.month, eom_day);
 125     }
 126
 127    private:
 128
 129   };
 130
 131
 132
 133 } } //namespace gregorian
 134
 135
 136
 137 #endif