Added boost header
This commit is contained in:
Christophe Riccio
193
test/external/boost/date_time/local_timezone_defs.hpp
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193
test/external/boost/date_time/local_timezone_defs.hpp
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#ifndef DATE_TIME_LOCAL_TIMEZONE_DEFS_HPP__
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#define DATE_TIME_LOCAL_TIMEZONE_DEFS_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: 2008-11-13 15:10:23 -0500 (Thu, 13 Nov 2008) $
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*/
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#include "boost/date_time/dst_rules.hpp"
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namespace boost {
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namespace date_time {
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// Configurations for common dst rules cases:
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// See http://www.wharton.co.uk/Support/sup_dst.htm for more
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// information on how various locales use dst rules
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//! Specification for daylight savings start rules in US
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/*! This class is used to configure dst_calc_engine template typically
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as follows:
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@code
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using namespace boost::gregorian;
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using namespace boost::posix_time;
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typedef us_dst_trait<date> us_dst_traits;
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typedef boost::date_time::dst_calc_engine<date, time_duration,
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us_dst_traits>
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us_dst_calc;
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//calculate the 2002 transition day of USA April 7 2002
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date dst_start = us_dst_calc::local_dst_start_day(2002);
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//calculate the 2002 transition day of USA Oct 27 2002
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date dst_end = us_dst_calc::local_dst_end_day(2002);
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//check if a local time is in dst or not -- posible answers
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//are yes, no, invalid time label, ambiguous
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ptime t(...some time...);
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if (us_dst::local_is_dst(t.date(), t.time_of_day())
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== boost::date_time::is_not_in_dst)
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{
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}
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@endcode
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This generates a type suitable for the calculation of dst
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transitions for the United States. Of course other templates
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can be used for other locales.
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*/
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template<class date_type>
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struct us_dst_trait
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{
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typedef typename date_type::day_of_week_type day_of_week_type;
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typedef typename date_type::month_type month_type;
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typedef typename date_type::year_type year_type;
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typedef date_time::nth_kday_of_month<date_type> start_rule_functor;
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typedef date_time::first_kday_of_month<date_type> end_rule_functor;
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typedef date_time::first_kday_of_month<date_type> start_rule_functor_pre2007;
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typedef date_time::last_kday_of_month<date_type> end_rule_functor_pre2007;
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static day_of_week_type start_day(year_type) {return Sunday;}
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static month_type start_month(year_type y)
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{
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if (y < 2007) return Apr;
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return Mar;
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}
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static day_of_week_type end_day(year_type) {return Sunday;}
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static month_type end_month(year_type y)
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{
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if (y < 2007) return Oct;
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return Nov;
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}
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static date_type local_dst_start_day(year_type year)
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{
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if (year < 2007) {
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start_rule_functor_pre2007 start1(start_day(year),
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start_month(year));
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return start1.get_date(year);
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}
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start_rule_functor start(start_rule_functor::second,
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start_day(year),
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start_month(year));
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return start.get_date(year);
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}
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static date_type local_dst_end_day(year_type year)
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{
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if (year < 2007) {
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end_rule_functor_pre2007 end_rule(end_day(year),
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end_month(year));
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return end_rule.get_date(year);
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}
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end_rule_functor end(end_day(year),
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end_month(year));
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return end.get_date(year);
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}
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static int dst_start_offset_minutes() { return 120;}
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static int dst_end_offset_minutes() { return 120; }
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static int dst_shift_length_minutes() { return 60; }
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};
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//!Rules for daylight savings start in the EU (Last Sun in Mar)
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/*!These amount to the following:
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- Start of dst day is last Sunday in March
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- End day of dst is last Sunday in Oct
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- Going forward switch time is 2:00 am (offset 120 minutes)
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- Going back switch time is 3:00 am (off set 180 minutes)
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- Shift duration is one hour (60 minutes)
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*/
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template<class date_type>
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struct eu_dst_trait
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{
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typedef typename date_type::day_of_week_type day_of_week_type;
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typedef typename date_type::month_type month_type;
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typedef typename date_type::year_type year_type;
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typedef date_time::last_kday_of_month<date_type> start_rule_functor;
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typedef date_time::last_kday_of_month<date_type> end_rule_functor;
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static day_of_week_type start_day(year_type) {return Sunday;}
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static month_type start_month(year_type) {return Mar;}
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static day_of_week_type end_day(year_type) {return Sunday;}
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static month_type end_month(year_type) {return Oct;}
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static int dst_start_offset_minutes() { return 120;}
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static int dst_end_offset_minutes() { return 180; }
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static int dst_shift_length_minutes() { return 60; }
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static date_type local_dst_start_day(year_type year)
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{
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start_rule_functor start(start_day(year),
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start_month(year));
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return start.get_date(year);
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}
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static date_type local_dst_end_day(year_type year)
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{
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end_rule_functor end(end_day(year),
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end_month(year));
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return end.get_date(year);
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}
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};
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//! Alternative dst traits for some parts of the United Kingdom
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/* Several places in the UK use EU start and end rules for the
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day, but different local conversion times (eg: forward change at 1:00
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am local and backward change at 2:00 am dst instead of 2:00am
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forward and 3:00am back for the EU).
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*/
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template<class date_type>
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struct uk_dst_trait : public eu_dst_trait<date_type>
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{
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static int dst_start_offset_minutes() { return 60;}
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static int dst_end_offset_minutes() { return 120; }
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static int dst_shift_length_minutes() { return 60; }
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};
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//Rules for Adelaide Australia
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template<class date_type>
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struct acst_dst_trait
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{
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typedef typename date_type::day_of_week_type day_of_week_type;
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typedef typename date_type::month_type month_type;
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typedef typename date_type::year_type year_type;
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typedef date_time::last_kday_of_month<date_type> start_rule_functor;
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typedef date_time::last_kday_of_month<date_type> end_rule_functor;
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static day_of_week_type start_day(year_type) {return Sunday;}
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static month_type start_month(year_type) {return Oct;}
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static day_of_week_type end_day(year_type) {return Sunday;}
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static month_type end_month(year_type) {return Mar;}
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static int dst_start_offset_minutes() { return 120;}
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static int dst_end_offset_minutes() { return 180; }
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static int dst_shift_length_minutes() { return 60; }
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static date_type local_dst_start_day(year_type year)
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{
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start_rule_functor start(start_day(year),
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start_month(year));
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return start.get_date(year);
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}
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static date_type local_dst_end_day(year_type year)
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{
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end_rule_functor end(end_day(year),
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end_month(year));
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return end.get_date(year);
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}
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};
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} } //namespace boost::date_time
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#endif
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