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#ifndef GREG_DATE_HPP___
#define GREG_DATE_HPP___
/* Copyright (c) 2002,2003 CrystalClear Software, Inc.
* Use, modification and distribution is subject to the
* Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
* Author: Jeff Garland
* $Date: 2008-11-12 14:37:53 -0500 (Wed, 12 Nov 2008) $
*/
#include <boost/throw_exception.hpp>
#include <boost/date_time/date.hpp>
#include <boost/date_time/special_defs.hpp>
#include <boost/date_time/gregorian/greg_calendar.hpp>
#include <boost/date_time/gregorian/greg_duration.hpp>
namespace boost {
namespace gregorian {
//bring special enum values into the namespace
using date_time::special_values;
using date_time::not_special;
using date_time::neg_infin;
using date_time::pos_infin;
using date_time::not_a_date_time;
using date_time::max_date_time;
using date_time::min_date_time;
//! A date type based on gregorian_calendar
/*! This class is the primary interface for programming with
greogorian dates. The is a lightweight type that can be
freely passed by value. All comparison operators are
supported.
\ingroup date_basics
*/
class date : public date_time::date<date, gregorian_calendar, date_duration>
{
public:
typedef gregorian_calendar::year_type year_type;
typedef gregorian_calendar::month_type month_type;
typedef gregorian_calendar::day_type day_type;
typedef gregorian_calendar::day_of_year_type day_of_year_type;
typedef gregorian_calendar::ymd_type ymd_type;
typedef gregorian_calendar::date_rep_type date_rep_type;
typedef gregorian_calendar::date_int_type date_int_type;
typedef date_duration duration_type;
#if !defined(DATE_TIME_NO_DEFAULT_CONSTRUCTOR)
//! Default constructor constructs with not_a_date_time
date():
date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(not_a_date_time))
{}
#endif // DATE_TIME_NO_DEFAULT_CONSTRUCTOR
//! Main constructor with year, month, day
date(year_type y, month_type m, day_type d)
: date_time::date<date, gregorian_calendar, date_duration>(y, m, d)
{
if (gregorian_calendar::end_of_month_day(y, m) < d) {
boost::throw_exception(bad_day_of_month(std::string("Day of month is not valid for year")));
}
}
//! Constructor from a ymd_type structure
explicit date(const ymd_type& ymd)
: date_time::date<date, gregorian_calendar, date_duration>(ymd)
{}
//! Needed copy constructor
explicit date(const date_int_type& rhs):
date_time::date<date,gregorian_calendar, date_duration>(rhs)
{}
//! Needed copy constructor
explicit date(date_rep_type rhs):
date_time::date<date,gregorian_calendar, date_duration>(rhs)
{}
//! Constructor for infinities, not a date, max and min date
explicit date(special_values sv):
date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(sv))
{
if (sv == min_date_time)
{
*this = date(1400, 1, 1);
}
if (sv == max_date_time)
{
*this = date(9999, 12, 31);
}
}
//!Return the Julian Day number for the date.
date_int_type julian_day() const
{
ymd_type ymd = year_month_day();
return gregorian_calendar::julian_day_number(ymd);
}
//!Return the day of year 1..365 or 1..366 (for leap year)
day_of_year_type day_of_year() const
{
date start_of_year(year(), 1, 1);
unsigned short doy = static_cast<unsigned short>((*this-start_of_year).days() + 1);
return day_of_year_type(doy);
}
//!Return the Modified Julian Day number for the date.
long modjulian_day() const
{
ymd_type ymd = year_month_day();
return gregorian_calendar::modjulian_day_number(ymd);
}
//!Return the iso 8601 week number 1..53
int week_number() const
{
ymd_type ymd = year_month_day();
return gregorian_calendar::week_number(ymd);
}
//! Return the day number from the calendar
date_int_type day_number() const
{
return days_;
}
//! Return the last day of the current month
date end_of_month() const
{
ymd_type ymd = year_month_day();
short eom_day = gregorian_calendar::end_of_month_day(ymd.year, ymd.month);
return date(ymd.year, ymd.month, eom_day);
}
private:
};
} } //namespace gregorian
#endif
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