#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 |