| #ifndef LOCAL_TIME_CUSTOM_TIME_ZONE_HPP__ |
| #define LOCAL_TIME_CUSTOM_TIME_ZONE_HPP__ |
| |
| /* Copyright (c) 2003-2005 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/time_zone_base.hpp" |
| #include "boost/date_time/time_zone_names.hpp" |
| #include "boost/date_time/posix_time/posix_time.hpp" |
| #include "boost/date_time/local_time/dst_transition_day_rules.hpp" |
| #include "boost/date_time/string_convert.hpp" |
| //#include "boost/date_time/special_defs.hpp" |
| #include "boost/shared_ptr.hpp" |
| |
| namespace boost { |
| namespace local_time { |
| |
| //typedef boost::date_time::time_zone_names time_zone_names; |
| typedef boost::date_time::dst_adjustment_offsets<boost::posix_time::time_duration> dst_adjustment_offsets; |
| //typedef boost::date_time::time_zone_base<boost::posix_time::ptime> time_zone; |
| typedef boost::shared_ptr<dst_calc_rule> dst_calc_rule_ptr; |
| |
| //! A real time zone |
| template<class CharT> |
| class custom_time_zone_base : public date_time::time_zone_base<posix_time::ptime,CharT> { |
| public: |
| typedef boost::posix_time::time_duration time_duration_type; |
| typedef date_time::time_zone_base<posix_time::ptime,CharT> base_type; |
| typedef typename base_type::string_type string_type; |
| typedef typename base_type::stringstream_type stringstream_type; |
| typedef date_time::time_zone_names_base<CharT> time_zone_names; |
| typedef CharT char_type; |
| |
| custom_time_zone_base(const time_zone_names& zone_names, |
| const time_duration_type& utc_offset, |
| const dst_adjustment_offsets& dst_shift, |
| boost::shared_ptr<dst_calc_rule> calc_rule) : |
| zone_names_(zone_names), |
| base_utc_offset_(utc_offset), |
| dst_offsets_(dst_shift), |
| dst_calc_rules_(calc_rule) |
| {}; |
| virtual ~custom_time_zone_base() {}; |
| virtual string_type dst_zone_abbrev() const |
| { |
| return zone_names_.dst_zone_abbrev(); |
| } |
| virtual string_type std_zone_abbrev() const |
| { |
| return zone_names_.std_zone_abbrev(); |
| } |
| virtual string_type dst_zone_name() const |
| { |
| return zone_names_.dst_zone_name(); |
| } |
| virtual string_type std_zone_name() const |
| { |
| return zone_names_.std_zone_name(); |
| } |
| //! True if zone uses daylight savings adjustments |
| virtual bool has_dst() const |
| { |
| return (dst_calc_rules_); //if calc_rule is set the tz has dst |
| } |
| //! Local time that DST starts -- NADT if has_dst is false |
| virtual posix_time::ptime dst_local_start_time(gregorian::greg_year y) const |
| { |
| gregorian::date d(gregorian::not_a_date_time); |
| if (dst_calc_rules_) { |
| d = dst_calc_rules_->start_day(y); |
| } |
| return posix_time::ptime(d, dst_offsets_.dst_start_offset_); |
| } |
| //! Local time that DST ends -- NADT if has_dst is false |
| virtual posix_time::ptime dst_local_end_time(gregorian::greg_year y) const |
| { |
| gregorian::date d(gregorian::not_a_date_time); |
| if (dst_calc_rules_) { |
| d = dst_calc_rules_->end_day(y); |
| } |
| return posix_time::ptime(d, dst_offsets_.dst_end_offset_); |
| } |
| //! Base offset from UTC for zone (eg: -07:30:00) |
| virtual time_duration_type base_utc_offset() const |
| { |
| return base_utc_offset_; |
| } |
| //! Adjustment forward or back made while DST is in effect |
| virtual time_duration_type dst_offset() const |
| { |
| return dst_offsets_.dst_adjust_; |
| } |
| //! Returns a POSIX time_zone string for this object |
| virtual string_type to_posix_string() const |
| { |
| // std offset dst [offset],start[/time],end[/time] - w/o spaces |
| stringstream_type ss; |
| ss.fill('0'); |
| boost::shared_ptr<dst_calc_rule> no_rules; |
| // std |
| ss << std_zone_abbrev(); |
| // offset |
| if(base_utc_offset().is_negative()) { |
| // inverting the sign guarantees we get two digits |
| ss << '-' << std::setw(2) << base_utc_offset().invert_sign().hours(); |
| } |
| else { |
| ss << '+' << std::setw(2) << base_utc_offset().hours(); |
| } |
| if(base_utc_offset().minutes() != 0 || base_utc_offset().seconds() != 0) { |
| ss << ':' << std::setw(2) << base_utc_offset().minutes(); |
| if(base_utc_offset().seconds() != 0) { |
| ss << ':' << std::setw(2) << base_utc_offset().seconds(); |
| } |
| } |
| if(dst_calc_rules_ != no_rules) { |
| // dst |
| ss << dst_zone_abbrev(); |
| // dst offset |
| if(dst_offset().is_negative()) { |
| // inverting the sign guarantees we get two digits |
| ss << '-' << std::setw(2) << dst_offset().invert_sign().hours(); |
| } |
| else { |
| ss << '+' << std::setw(2) << dst_offset().hours(); |
| } |
| if(dst_offset().minutes() != 0 || dst_offset().seconds() != 0) { |
| ss << ':' << std::setw(2) << dst_offset().minutes(); |
| if(dst_offset().seconds() != 0) { |
| ss << ':' << std::setw(2) << dst_offset().seconds(); |
| } |
| } |
| // start/time |
| ss << ',' << date_time::convert_string_type<char, char_type>(dst_calc_rules_->start_rule_as_string()) << '/' |
| << std::setw(2) << dst_offsets_.dst_start_offset_.hours() << ':' |
| << std::setw(2) << dst_offsets_.dst_start_offset_.minutes(); |
| if(dst_offsets_.dst_start_offset_.seconds() != 0) { |
| ss << ':' << std::setw(2) << dst_offsets_.dst_start_offset_.seconds(); |
| } |
| // end/time |
| ss << ',' << date_time::convert_string_type<char, char_type>(dst_calc_rules_->end_rule_as_string()) << '/' |
| << std::setw(2) << dst_offsets_.dst_end_offset_.hours() << ':' |
| << std::setw(2) << dst_offsets_.dst_end_offset_.minutes(); |
| if(dst_offsets_.dst_end_offset_.seconds() != 0) { |
| ss << ':' << std::setw(2) << dst_offsets_.dst_end_offset_.seconds(); |
| } |
| } |
| |
| return ss.str(); |
| } |
| private: |
| time_zone_names zone_names_; |
| bool has_dst_; |
| time_duration_type base_utc_offset_; |
| dst_adjustment_offsets dst_offsets_; |
| boost::shared_ptr<dst_calc_rule> dst_calc_rules_; |
| }; |
| |
| typedef custom_time_zone_base<char> custom_time_zone; |
| |
| } }//namespace |
| |
| |
| |
| #endif |