#ifndef DATE_DURATION_TYPES_HPP___ | |
#define DATE_DURATION_TYPES_HPP___ | |
/* Copyright (c) 2004 CrystalClear Software, Inc. | |
* 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, Bart Garst | |
* $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ | |
*/ | |
#include <boost/date_time/int_adapter.hpp> | |
#include <boost/date_time/special_defs.hpp> | |
#include <boost/date_time/date_duration.hpp> | |
namespace boost { | |
namespace date_time { | |
//! Additional duration type that represents a number of n*7 days | |
template <class duration_config> | |
class weeks_duration : public date_duration<duration_config> { | |
public: | |
weeks_duration(typename duration_config::impl_type w) | |
: date_duration<duration_config>(w * 7) {} | |
weeks_duration(special_values sv) | |
: date_duration<duration_config>(sv) {} | |
}; | |
// predeclare | |
template<class t> | |
class years_duration; | |
//! additional duration type that represents a logical month | |
/*! A logical month enables things like: "date(2002,Mar,2) + months(2) -> | |
* 2002-May2". If the date is a last day-of-the-month, the result will | |
* also be a last-day-of-the-month. | |
*/ | |
template<class base_config> | |
class months_duration | |
{ | |
private: | |
typedef typename base_config::int_rep int_rep; | |
typedef typename int_rep::int_type int_type; | |
typedef typename base_config::date_type date_type; | |
typedef typename date_type::duration_type duration_type; | |
typedef typename base_config::month_adjustor_type month_adjustor_type; | |
typedef months_duration<base_config> months_type; | |
typedef years_duration<base_config> years_type; | |
public: | |
months_duration(int_rep num) : _m(num) {} | |
months_duration(special_values sv) : _m(sv) | |
{ | |
_m = int_rep::from_special(sv); | |
} | |
int_rep number_of_months() const { return _m; } | |
//! returns a negative duration | |
duration_type get_neg_offset(const date_type& d) const | |
{ | |
month_adjustor_type m_adj(_m.as_number()); | |
return duration_type(m_adj.get_neg_offset(d)); | |
} | |
duration_type get_offset(const date_type& d) const | |
{ | |
month_adjustor_type m_adj(_m.as_number()); | |
return duration_type(m_adj.get_offset(d)); | |
} | |
bool operator==(const months_type& rhs) const | |
{ | |
return(_m == rhs._m); | |
} | |
bool operator!=(const months_type& rhs) const | |
{ | |
return(_m != rhs._m); | |
} | |
months_type operator+(const months_type& rhs)const | |
{ | |
return months_type(_m + rhs._m); | |
} | |
months_type& operator+=(const months_type& rhs) | |
{ | |
_m = _m + rhs._m; | |
return *this; | |
} | |
months_type operator-(const months_type& rhs)const | |
{ | |
return months_type(_m - rhs._m); | |
} | |
months_type& operator-=(const months_type& rhs) | |
{ | |
_m = _m - rhs._m; | |
return *this; | |
} | |
months_type operator*(const int_type rhs)const | |
{ | |
return months_type(_m * rhs); | |
} | |
months_type& operator*=(const int_type rhs) | |
{ | |
_m = _m * rhs; | |
return *this; | |
} | |
months_type operator/(const int_type rhs)const | |
{ | |
return months_type(_m / rhs); | |
} | |
months_type& operator/=(const int_type rhs) | |
{ | |
_m = _m / rhs; | |
return *this; | |
} | |
months_type operator+(const years_type& y)const | |
{ | |
return months_type(y.number_of_years() * 12 + _m); | |
} | |
months_type& operator+=(const years_type& y) | |
{ | |
_m = y.number_of_years() * 12 + _m; | |
return *this; | |
} | |
months_type operator-(const years_type& y) const | |
{ | |
return months_type(_m - y.number_of_years() * 12); | |
} | |
months_type& operator-=(const years_type& y) | |
{ | |
_m = _m - y.number_of_years() * 12; | |
return *this; | |
} | |
// | |
friend date_type operator+(const date_type& d, const months_type& m) | |
{ | |
return d + m.get_offset(d); | |
} | |
friend date_type operator+=(date_type& d, const months_type& m) | |
{ | |
return d += m.get_offset(d); | |
} | |
friend date_type operator-(const date_type& d, const months_type& m) | |
{ | |
// get_neg_offset returns a negative duration, so we add | |
return d + m.get_neg_offset(d); | |
} | |
friend date_type operator-=(date_type& d, const months_type& m) | |
{ | |
// get_neg_offset returns a negative duration, so we add | |
return d += m.get_neg_offset(d); | |
} | |
private: | |
int_rep _m; | |
}; | |
//! additional duration type that represents a logical year | |
/*! A logical year enables things like: "date(2002,Mar,2) + years(2) -> | |
* 2004-Mar-2". If the date is a last day-of-the-month, the result will | |
* also be a last-day-of-the-month (ie date(2001-Feb-28) + years(3) -> | |
* 2004-Feb-29). | |
*/ | |
template<class base_config> | |
class years_duration | |
{ | |
private: | |
typedef typename base_config::int_rep int_rep; | |
typedef typename int_rep::int_type int_type; | |
typedef typename base_config::date_type date_type; | |
typedef typename date_type::duration_type duration_type; | |
typedef typename base_config::month_adjustor_type month_adjustor_type; | |
typedef years_duration<base_config> years_type; | |
typedef months_duration<base_config> months_type; | |
public: | |
years_duration(int_rep num) : _y(num) {} | |
years_duration(special_values sv) : _y(sv) | |
{ | |
_y = int_rep::from_special(sv); | |
} | |
int_rep number_of_years() const { return _y; } | |
//! returns a negative duration | |
duration_type get_neg_offset(const date_type& d) const | |
{ | |
month_adjustor_type m_adj(_y.as_number() * 12); | |
return duration_type(m_adj.get_neg_offset(d)); | |
} | |
duration_type get_offset(const date_type& d) const | |
{ | |
month_adjustor_type m_adj(_y.as_number() * 12); | |
return duration_type(m_adj.get_offset(d)); | |
} | |
bool operator==(const years_type& rhs) const | |
{ | |
return(_y == rhs._y); | |
} | |
bool operator!=(const years_type& rhs) const | |
{ | |
return(_y != rhs._y); | |
} | |
years_type operator+(const years_type& rhs)const | |
{ | |
return years_type(_y + rhs._y); | |
} | |
years_type& operator+=(const years_type& rhs) | |
{ | |
_y = _y + rhs._y; | |
return *this; | |
} | |
years_type operator-(const years_type& rhs)const | |
{ | |
return years_type(_y - rhs._y); | |
} | |
years_type& operator-=(const years_type& rhs) | |
{ | |
_y = _y - rhs._y; | |
return *this; | |
} | |
years_type operator*(const int_type rhs)const | |
{ | |
return years_type(_y * rhs); | |
} | |
years_type& operator*=(const int_type rhs) | |
{ | |
_y = _y * rhs; | |
return *this; | |
} | |
years_type operator/(const int_type rhs)const | |
{ | |
return years_type(_y / rhs); | |
} | |
years_type& operator/=(const int_type rhs) | |
{ | |
_y = _y / rhs; | |
return *this; | |
} | |
months_type operator+(const months_type& m) const | |
{ | |
return(months_type(_y * 12 + m.number_of_months())); | |
} | |
months_type operator-(const months_type& m) const | |
{ | |
return(months_type(_y * 12 - m.number_of_months())); | |
} | |
// | |
friend date_type operator+(const date_type& d, const years_type& y) | |
{ | |
return d + y.get_offset(d); | |
} | |
friend date_type operator+=(date_type& d, const years_type& y) | |
{ | |
return d += y.get_offset(d); | |
} | |
friend date_type operator-(const date_type& d, const years_type& y) | |
{ | |
// get_neg_offset returns a negative duration, so we add | |
return d + y.get_neg_offset(d); | |
} | |
friend date_type operator-=(date_type& d, const years_type& y) | |
{ | |
// get_neg_offset returns a negative duration, so we add | |
return d += y.get_neg_offset(d); | |
} | |
private: | |
int_rep _y; | |
}; | |
}} // namespace boost::date_time | |
#endif // DATE_DURATION_TYPES_HPP___ |