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Diffstat (limited to 'boost/date_time/local_time/custom_time_zone.hpp')
| -rw-r--r-- | boost/date_time/local_time/custom_time_zone.hpp | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/boost/date_time/local_time/custom_time_zone.hpp b/boost/date_time/local_time/custom_time_zone.hpp new file mode 100644 index 0000000000..a6c1d42055 --- /dev/null +++ b/boost/date_time/local_time/custom_time_zone.hpp @@ -0,0 +1,169 @@ +#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 |