137 lines
4.4 KiB
C++
137 lines
4.4 KiB
C++
#ifndef GREG_DATE_HPP___
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#define GREG_DATE_HPP___
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/* Copyright (c) 2002,2003 CrystalClear Software, Inc.
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* Use, modification and distribution is subject to the
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* Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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* Author: Jeff Garland
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* $Date: 2010-01-10 14:17:23 -0500 (Sun, 10 Jan 2010) $
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*/
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#include <boost/throw_exception.hpp>
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#include <boost/date_time/date.hpp>
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#include <boost/date_time/special_defs.hpp>
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#include <boost/date_time/gregorian/greg_calendar.hpp>
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#include <boost/date_time/gregorian/greg_duration.hpp>
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namespace boost {
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namespace gregorian {
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//bring special enum values into the namespace
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using date_time::special_values;
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using date_time::not_special;
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using date_time::neg_infin;
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using date_time::pos_infin;
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using date_time::not_a_date_time;
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using date_time::max_date_time;
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using date_time::min_date_time;
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//! A date type based on gregorian_calendar
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/*! This class is the primary interface for programming with
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greogorian dates. The is a lightweight type that can be
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freely passed by value. All comparison operators are
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supported.
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\ingroup date_basics
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*/
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class date : public date_time::date<date, gregorian_calendar, date_duration>
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{
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public:
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typedef gregorian_calendar::year_type year_type;
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typedef gregorian_calendar::month_type month_type;
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typedef gregorian_calendar::day_type day_type;
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typedef gregorian_calendar::day_of_year_type day_of_year_type;
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typedef gregorian_calendar::ymd_type ymd_type;
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typedef gregorian_calendar::date_rep_type date_rep_type;
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typedef gregorian_calendar::date_int_type date_int_type;
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typedef date_duration duration_type;
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#if !defined(DATE_TIME_NO_DEFAULT_CONSTRUCTOR)
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//! Default constructor constructs with not_a_date_time
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date():
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date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(not_a_date_time))
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{}
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#endif // DATE_TIME_NO_DEFAULT_CONSTRUCTOR
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//! Main constructor with year, month, day
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date(year_type y, month_type m, day_type d)
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: date_time::date<date, gregorian_calendar, date_duration>(y, m, d)
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{
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if (gregorian_calendar::end_of_month_day(y, m) < d) {
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boost::throw_exception(bad_day_of_month(std::string("Day of month is not valid for year")));
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}
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}
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//! Constructor from a ymd_type structure
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explicit date(const ymd_type& ymd)
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: date_time::date<date, gregorian_calendar, date_duration>(ymd)
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{}
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//! Needed copy constructor
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explicit date(const date_int_type& rhs):
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date_time::date<date,gregorian_calendar, date_duration>(rhs)
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{}
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//! Needed copy constructor
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explicit date(date_rep_type rhs):
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date_time::date<date,gregorian_calendar, date_duration>(rhs)
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{}
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//! Constructor for infinities, not a date, max and min date
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explicit date(special_values sv):
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date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(sv))
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{
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if (sv == min_date_time)
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{
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*this = date(1400, 1, 1);
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}
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if (sv == max_date_time)
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{
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*this = date(9999, 12, 31);
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}
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}
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//!Return the Julian Day number for the date.
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date_int_type julian_day() const
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{
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ymd_type ymd = year_month_day();
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return gregorian_calendar::julian_day_number(ymd);
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}
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//!Return the day of year 1..365 or 1..366 (for leap year)
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day_of_year_type day_of_year() const
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{
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date start_of_year(year(), 1, 1);
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unsigned short doy = static_cast<unsigned short>((*this-start_of_year).days() + 1);
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return day_of_year_type(doy);
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}
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//!Return the Modified Julian Day number for the date.
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date_int_type modjulian_day() const
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{
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ymd_type ymd = year_month_day();
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return gregorian_calendar::modjulian_day_number(ymd);
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}
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//!Return the iso 8601 week number 1..53
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int week_number() const
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{
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ymd_type ymd = year_month_day();
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return gregorian_calendar::week_number(ymd);
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}
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//! Return the day number from the calendar
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date_int_type day_number() const
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{
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return days_;
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}
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//! Return the last day of the current month
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date end_of_month() const
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{
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ymd_type ymd = year_month_day();
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short eom_day = gregorian_calendar::end_of_month_day(ymd.year, ymd.month);
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return date(ymd.year, ymd.month, eom_day);
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}
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private:
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};
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} } //namespace gregorian
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#endif
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