Line data    Source code

       1              : /********************************************************************\
       2              :  * gnc-timezone.cpp - Retrieve timezone information from OS.        *
       3              :  * Copyright 2014 John Ralls <jralls@ceridwen.us>                   *
       4              :  * Based on work done with Arnel Borja for GLib's gtimezone in 2012.*
       5              :  * This program is free software; you can redistribute it and/or    *
       6              :  * modify it under the terms of the GNU General Public License as   *
       7              :  * published by the Free Software Foundation; either version 2 of   *
       8              :  * the License, or (at your option) any later version.              *
       9              :  *                                                                  *
      10              :  * This program is distributed in the hope that it will be useful,  *
      11              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of   *
      12              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the    *
      13              :  * GNU General Public License for more details.                     *
      14              :  *                                                                  *
      15              :  * You should have received a copy of the GNU General Public License*
      16              :  * along with this program; if not, contact:                        *
      17              :  *                                                                  *
      18              :  * Free Software Foundation           Voice:  +1-617-542-5942       *
      19              :  * 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652       *
      20              :  * Boston, MA  02110-1301,  USA       gnu@gnu.org                   *
      21              : \********************************************************************/
      22              : 
      23              : #ifndef __GNC_TIMEZONE_HPP__
      24              : #define __GNC_TIMEZONE_HPP__
      25              : 
      26              : #include <platform.h>
      27              : #if PLATFORM(WINDOWS)
      28              : #include <windows.h>
      29              : #endif
      30              : 
      31              : #define BOOST_ERROR_CODE_HEADER_ONLY
      32              : #include <boost/date_time/local_time/local_time.hpp>
      33              : 
      34              : namespace gnc
      35              : {
      36              :     namespace date
      37              :     {}
      38              : }// Move these later
      39              : using TZ = boost::local_time::time_zone;
      40              : using TZ_Ptr = boost::local_time::time_zone_ptr;
      41              : using TZ_Entry = std::pair<int, TZ_Ptr>;
      42              : using TZ_Vector = std::vector<TZ_Entry>;
      43              : using time_zone_names = boost::local_time::time_zone_names;
      44              : 
      45              : class TimeZoneProvider
      46              : {
      47              : public:
      48              :     // The default constructor provides the time zone for the current locale
      49          354 :     TimeZoneProvider() : TimeZoneProvider (static_cast<std::string>("")) {}
      50              :     TimeZoneProvider(const std::string& tzname); //create a provider for a specified TZ.
      51              :     TimeZoneProvider(const TimeZoneProvider&) = delete;
      52              :     TimeZoneProvider(const TimeZoneProvider&&) = delete;
      53              :     TimeZoneProvider operator=(const TimeZoneProvider&) = delete;
      54              :     TimeZoneProvider operator=(const TimeZoneProvider&&) = delete;
      55              :     TZ_Ptr get (int year) const noexcept;
      56              :     void dump() const noexcept;
      57              :     static const unsigned int min_year; //1400
      58              :     static const unsigned int max_year; //9999
      59              : private:
      60              :     void parse_file(const std::string& tzname);
      61              :     bool construct(const std::string& tzname);
      62              :     TZ_Vector m_zone_vector;
      63              : #if PLATFORM(WINDOWS)
      64              :     void load_windows_dynamic_tz(HKEY, time_zone_names);
      65              :     void load_windows_classic_tz(HKEY, time_zone_names);
      66              :     void load_windows_default_tz(void);
      67              : #endif
      68              : };
      69              : 
      70              : #endif //__GCN_TIMEZONE_HPP__