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
19namespace boost {
20namespace 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(sv: not_a_date_time))
53 {}
54#endif // DATE_TIME_NO_DEFAULT_CONSTRUCTOR
55 //! Main constructor with year, month, day
56 BOOST_CXX14_CONSTEXPR 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(year: y, month: m) < d) {
60 boost::throw_exception(e: bad_day_of_month(std::string("Day of month is not valid for year")));
61 }
62 }
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 BOOST_CXX14_CONSTEXPR 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 BOOST_CXX14_CONSTEXPR explicit date(special_values sv):
77 date_time::date<date, gregorian_calendar, date_duration>(from_special_adjusted(sv))
78 {}
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 BOOST_CXX14_CONSTEXPR date_int_type day_number() const
106 {
107 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(year: ymd.year, month: 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 BOOST_CXX14_CONSTEXPR date_rep_type from_special_adjusted(special_values sv)
123 {
124 switch (sv)
125 {
126 case min_date_time: return gregorian_calendar::day_number(ymd: ymd_type(1400, 1, 1));
127 case max_date_time: return gregorian_calendar::day_number(ymd: ymd_type(9999, 12, 31));
128 default: return date_rep_type::from_special(sv);
129 }
130 }
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
145

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