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#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
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Swift