source: NonGTP/Boost/boost/date_time/gregorian/greg_date.hpp @ 857

Revision 857, 4.5 KB checked in by igarcia, 19 years ago (diff)
Line 
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 or http://www.boost.org/LICENSE-1.0)
8 * Author: Jeff Garland
9 * $Date: 2004/09/10 23:09:50 $
10 */
11
12#include "boost/date_time/date.hpp"
13#include "boost/date_time/special_defs.hpp"
14#include "boost/date_time/gregorian/greg_calendar.hpp"
15#include "boost/date_time/gregorian/greg_duration.hpp"
16
17namespace boost {
18namespace gregorian {
19
20  //bring special enum values into the namespace
21  using date_time::special_values;
22  using date_time::not_special;
23  using date_time::neg_infin;
24  using date_time::pos_infin;
25  using date_time::not_a_date_time;
26  using date_time::max_date_time;
27  using date_time::min_date_time;
28
29  //! A date type based on gregorian_calendar
30  /*! This class is the primary interface for programming with
31      greogorian dates.  The is a lightweight type that can be
32      freely passed by value.  All comparison operators are
33      supported. 
34      \ingroup date_basics
35  */
36  class date : public date_time::date<date, gregorian_calendar, date_duration>
37  {
38   public:
39    typedef gregorian_calendar::year_type year_type;
40    typedef gregorian_calendar::month_type month_type;
41    typedef gregorian_calendar::day_type day_type;
42    typedef gregorian_calendar::day_of_year_type day_of_year_type;
43    typedef gregorian_calendar::ymd_type ymd_type;
44    typedef gregorian_calendar::date_rep_type date_rep_type;
45    typedef gregorian_calendar::date_int_type date_int_type;
46    typedef date_duration  duration_type;
47#if !defined(DATE_TIME_NO_DEFAULT_CONSTRUCTOR)
48    //! Default constructor constructs with not_a_date_time
49    date():
50      date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(not_a_date_time))
51    {}
52#endif // DATE_TIME_NO_DEFAULT_CONSTRUCTOR
53    //! Main constructor with year, month, day
54    date(year_type y, month_type m, day_type d)
55      : date_time::date<date, gregorian_calendar, date_duration>(y, m, d)
56    {
57      if (gregorian_calendar::end_of_month_day(y, m) < d) {
58        throw bad_day_of_month(std::string("Day of month is not valid for year"));
59      }
60    }
61    //! Constructor from a ymd_type structure
62    explicit date(const ymd_type& ymd)
63      : date_time::date<date, gregorian_calendar, date_duration>(ymd)
64    {}
65    //! Needed copy constructor
66    explicit date(const date_int_type& rhs):
67      date_time::date<date,gregorian_calendar, date_duration>(rhs)
68    {}
69    //! Needed copy constructor
70    explicit date(date_rep_type rhs):
71      date_time::date<date,gregorian_calendar, date_duration>(rhs)
72    {}
73    //! Constructor for infinities, not a date, max and min date
74    explicit date(special_values sv):
75      date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(sv))
76    {
77      if (sv == min_date_time)
78      {
79        *this = date(1400, 1, 1);
80      }
81      if (sv == max_date_time)
82      {
83        *this = date(9999, 12, 31);
84      }
85
86    }
87    //!Return the Julian Day number for the date.
88    date_int_type julian_day() const
89    {
90      ymd_type ymd = year_month_day();
91      return gregorian_calendar::julian_day_number(ymd);
92    }
93    //!Return the day of year 1..365 or 1..366 (for leap year)
94    day_of_year_type day_of_year() const
95    {
96      date start_of_year(year(), 1, 1);
97      unsigned short doy = static_cast<unsigned short>((*this-start_of_year).days() + 1);
98      return day_of_year_type(doy);
99    }
100    //!Return the Modified Julian Day number for the date.
101    long modjulian_day() const
102    {
103      ymd_type ymd = year_month_day();
104      return gregorian_calendar::modjulian_day_number(ymd);     
105    }
106    //!Return the iso 8601 week number 1..53
107    int week_number() const
108    {
109      ymd_type ymd = year_month_day();
110      return gregorian_calendar::week_number(ymd);     
111    }
112    //! Return the day number from the calendar
113    date_int_type day_number() const
114    {
115      return days_;
116    }
117    //! Return the last day of the current month
118    date end_of_month() const
119    {
120      ymd_type ymd = year_month_day();
121      short eom_day =  gregorian_calendar::end_of_month_day(ymd.year, ymd.month);
122      return date(ymd.year, ymd.month, eom_day);
123    }
124
125   private:
126
127  };
128 
129
130
131} } //namespace gregorian
132
133
134
135#endif
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