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author | Remko Tronçon <git@el-tramo.be> | 2009-06-01 08:48:42 (GMT) |
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committer | Remko Tronçon <git@el-tramo.be> | 2009-06-01 09:24:28 (GMT) |
commit | 2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch) | |
tree | d46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/date_time/adjust_functors.hpp | |
download | swift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.zip swift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.tar.bz2 |
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Diffstat (limited to '3rdParty/Boost/boost/date_time/adjust_functors.hpp')
-rw-r--r-- | 3rdParty/Boost/boost/date_time/adjust_functors.hpp | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/date_time/adjust_functors.hpp b/3rdParty/Boost/boost/date_time/adjust_functors.hpp new file mode 100644 index 0000000..7854ae4 --- /dev/null +++ b/3rdParty/Boost/boost/date_time/adjust_functors.hpp @@ -0,0 +1,178 @@ +#ifndef _DATE_TIME_ADJUST_FUNCTORS_HPP___ +#define _DATE_TIME_ADJUST_FUNCTORS_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, Bart Garst + * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ + */ + +#include "boost/date_time/date.hpp" +#include "boost/date_time/wrapping_int.hpp" + +namespace boost { +namespace date_time { + + + //! Functor to iterate a fixed number of days + template<class date_type> + class day_functor + { + public: + typedef typename date_type::duration_type duration_type; + day_functor(int f) : f_(f) {} + duration_type get_offset(const date_type& d) const + { + // why is 'd' a parameter??? + // fix compiler warnings + d.year(); + return duration_type(f_); + } + duration_type get_neg_offset(const date_type& d) const + { + // fix compiler warnings + d.year(); + return duration_type(-f_); + } + private: + int f_; + }; + + + //! Provides calculation to find next nth month given a date + /*! This adjustment function provides the logic for 'month-based' + * advancement on a ymd based calendar. The policy it uses + * to handle the non existant end of month days is to back + * up to the last day of the month. Also, if the starting + * date is the last day of a month, this functor will attempt + * to adjust to the end of the month. + + */ + template<class date_type> + class month_functor + { + public: + typedef typename date_type::duration_type duration_type; + typedef typename date_type::calendar_type cal_type; + typedef typename cal_type::ymd_type ymd_type; + typedef typename cal_type::day_type day_type; + + month_functor(int f) : f_(f), origDayOfMonth_(0) {} + duration_type get_offset(const date_type& d) const + { + ymd_type ymd(d.year_month_day()); + if (origDayOfMonth_ == 0) { + origDayOfMonth_ = ymd.day; + day_type endOfMonthDay(cal_type::end_of_month_day(ymd.year,ymd.month)); + if (endOfMonthDay == ymd.day) { + origDayOfMonth_ = -1; //force the value to the end of month + } + } + typedef date_time::wrapping_int2<short,1,12> wrap_int2; + typedef typename wrap_int2::int_type int_type; + wrap_int2 wi(ymd.month); + //calc the year wrap around, add() returns 0 or 1 if wrapped + int_type year = wi.add(static_cast<int_type>(f_)); + year = static_cast<int_type>(year + ymd.year); //calculate resulting year +// std::cout << "trace wi: " << wi.as_int() << std::endl; +// std::cout << "trace year: " << year << std::endl; + //find the last day for the new month + day_type resultingEndOfMonthDay(cal_type::end_of_month_day(year, wi.as_int())); + //original was the end of month -- force to last day of month + if (origDayOfMonth_ == -1) { + return date_type(year, wi.as_int(), resultingEndOfMonthDay) - d; + } + day_type dayOfMonth = origDayOfMonth_; + if (dayOfMonth > resultingEndOfMonthDay) { + dayOfMonth = resultingEndOfMonthDay; + } + return date_type(year, wi.as_int(), dayOfMonth) - d; + } + //! Returns a negative duration_type + duration_type get_neg_offset(const date_type& d) const + { + ymd_type ymd(d.year_month_day()); + if (origDayOfMonth_ == 0) { + origDayOfMonth_ = ymd.day; + day_type endOfMonthDay(cal_type::end_of_month_day(ymd.year,ymd.month)); + if (endOfMonthDay == ymd.day) { + origDayOfMonth_ = -1; //force the value to the end of month + } + } + typedef date_time::wrapping_int2<short,1,12> wrap_int2; + typedef typename wrap_int2::int_type int_type; + wrap_int2 wi(ymd.month); + //calc the year wrap around, add() returns 0 or 1 if wrapped + int_type year = wi.subtract(static_cast<int_type>(f_)); + year = static_cast<int_type>(year + ymd.year); //calculate resulting year + //find the last day for the new month + day_type resultingEndOfMonthDay(cal_type::end_of_month_day(year, wi.as_int())); + //original was the end of month -- force to last day of month + if (origDayOfMonth_ == -1) { + return date_type(year, wi.as_int(), resultingEndOfMonthDay) - d; + } + day_type dayOfMonth = origDayOfMonth_; + if (dayOfMonth > resultingEndOfMonthDay) { + dayOfMonth = resultingEndOfMonthDay; + } + return date_type(year, wi.as_int(), dayOfMonth) - d; + } + private: + int f_; + mutable short origDayOfMonth_; + }; + + + //! Functor to iterate a over weeks + template<class date_type> + class week_functor + { + public: + typedef typename date_type::duration_type duration_type; + typedef typename date_type::calendar_type calendar_type; + week_functor(int f) : f_(f) {} + duration_type get_offset(const date_type& d) const + { + // why is 'd' a parameter??? + // fix compiler warnings + d.year(); + return duration_type(f_*calendar_type::days_in_week()); + } + duration_type get_neg_offset(const date_type& d) const + { + // fix compiler warnings + d.year(); + return duration_type(-f_*calendar_type::days_in_week()); + } + private: + int f_; + }; + + //! Functor to iterate by a year adjusting for leap years + template<class date_type> + class year_functor + { + public: + //typedef typename date_type::year_type year_type; + typedef typename date_type::duration_type duration_type; + year_functor(int f) : _mf(f * 12) {} + duration_type get_offset(const date_type& d) const + { + return _mf.get_offset(d); + } + duration_type get_neg_offset(const date_type& d) const + { + return _mf.get_neg_offset(d); + } + private: + month_functor<date_type> _mf; + }; + + +} }//namespace date_time + + +#endif + |