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

source code of boost/boost/date_time/gregorian/greg_date.hpp