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boost::date_time::local_adjustor — Template that simplifies the creation of local time calculator.
// In header: <boost/date_time/local_time_adjustor.hpp> template<typename time_type, short utc_offset, typename dst_rule> class local_adjustor { public: // types typedef time_type::time_duration_type time_duration_type; typedef time_type::date_type date_type; typedef static_local_time_adjustor< time_type, dst_rule, utc_adjustment< time_duration_type, utc_offset > > dst_adjustor; // public static functions static time_type utc_to_local(const time_type &); static time_type local_to_utc(const time_type &, date_time::dst_flags = date_time::calculate); };
Use this template to create the timezone to utc convertors as required.
This class will also work for other regions that don't use dst and have a utc offset which is an integral number of hours.
Template Parameters -time_type -- Time class to use -utc_offset -- Number hours local time is adjust from utc -use_dst -- true (default) if region uses dst, false otherwise For example:
//eastern timezone is utc-5 typedef date_time::local_adjustor<ptime, -5, us_dst> us_eastern; typedef date_time::local_adjustor<ptime, -6, us_dst> us_central; typedef date_time::local_adjustor<ptime, -7, us_dst> us_mountain; typedef date_time::local_adjustor<ptime, -8, us_dst> us_pacific; typedef date_time::local_adjustor<ptime, -7, no_dst> us_arizona;