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73 lines
3.0 KiB
C++
73 lines
3.0 KiB
C++
/********************************************************************\
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* gnc-timezone.cpp - Retrieve timezone information from OS. *
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* Copyright 2014 John Ralls <jralls@ceridwen.us> *
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* Based on work done with Arnel Borja for GLib's gtimezone in 2012.*
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, contact: *
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* *
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* Free Software Foundation Voice: +1-617-542-5942 *
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* 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652 *
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* Boston, MA 02110-1301, USA gnu@gnu.org *
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\********************************************************************/
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#ifndef __GNC_TIMEZONE_HPP__
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#define __GNC_TIMEZONE_HPP__
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extern "C"
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{
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#include <platform.h>
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#if PLATFORM(WINDOWS)
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#include <windows.h>
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#endif
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}
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#define BOOST_ERROR_CODE_HEADER_ONLY
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#include <boost/date_time/local_time/local_time.hpp>
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namespace gnc
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{
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namespace date
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{}
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}// Move these later
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using TZ = boost::local_time::time_zone;
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using TZ_Ptr = boost::local_time::time_zone_ptr;
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using TZ_Entry = std::pair<int, TZ_Ptr>;
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using TZ_Vector = std::vector<TZ_Entry>;
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using time_zone_names = boost::local_time::time_zone_names;
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class TimeZoneProvider
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{
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public:
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// The default constructor provides the time zone for the current locale
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TimeZoneProvider() : TimeZoneProvider (static_cast<std::string>("")) {}
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TimeZoneProvider(const std::string& tzname); //create a provider for a specified TZ.
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TimeZoneProvider(const TimeZoneProvider&) = delete;
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TimeZoneProvider(const TimeZoneProvider&&) = delete;
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TimeZoneProvider operator=(const TimeZoneProvider&) = delete;
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TimeZoneProvider operator=(const TimeZoneProvider&&) = delete;
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TZ_Ptr get (int year) const noexcept;
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void dump() const noexcept;
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static const unsigned int min_year; //1400
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static const unsigned int max_year; //9999
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private:
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void parse_file(const std::string& tzname);
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bool construct(const std::string& tzname);
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TZ_Vector m_zone_vector;
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#if PLATFORM(WINDOWS)
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void load_windows_dynamic_tz(HKEY, time_zone_names);
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void load_windows_classic_tz(HKEY, time_zone_names);
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void load_windows_default_tz(void);
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#endif
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};
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#endif //__GCN_TIMEZONE_HPP__
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