time_utils.h

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#ifndef __TIME_UTILS_H__
#define __TIME_UTILS_H__

/*
 * This file is part of liberutils.
 *
 * liberutils is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * liberutils is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * Copyright (C) 2009 iRex Technologies B.V.
 * All rights reserved.
 */
 
//----------------------------------------------------------------------------
// Include Files
//----------------------------------------------------------------------------

#include <glib.h>

G_BEGIN_DECLS

#define TOTAL_TIMEZONES  33
#define TZ_FILE           "/home/root/.timezone"

typedef struct
{
    int  tzoffset;
    char tzname[12];
    char description[80];
} tz_info;

static const tz_info timezones[TOTAL_TIMEZONES] =
{
    {-39600, "GMT+11:00", "(GMT-11:00) Midway Island, Samoa"                                  },
    {-36000, "GMT+10:00", "(GMT-10:00) Hawaii"                                                },
    {-32400, "GMT+09:00", "(GMT-09:00) Alaska"                                                },
    {-28800, "GMT+08:00", "(GMT-08:00) US Pacific Time"                                       },
    {-25200, "GMT+07:00", "(GMT-07:00) US Mountain Time"                                      },
    {-21600, "GMT+06:00", "(GMT-06:00) US Central Time"                                       },
    {-18000, "GMT+05:00", "(GMT-05:00) US Eastern Time"                                       },
    {-14400, "GMT+04:00", "(GMT-04:00) Atlantic Time"                                         },
    {-12600, "GMT+03:30", "(GMT-03:30) Newfoundland and Labrador"                             },
    {-10800, "GMT+03:00", "(GMT-03:00) Georgetown, Greenland, Buenos Aires"                   },
    { -7200, "GMT+02:00", "(GMT-02:00) Mid-Atlantic"                                          },
    { -3600, "GMT+01:00", "(GMT-01:00) Cape Verde Islands, Azores"                            },
    {     0, "GMT+00:00", "(GMT) Greenwich Mean Time, London, Lisbon"                         },
    {  3600, "GMT-01:00", "(GMT+01:00) Central European Time, Amsterdam, Paris"               },
    {  7200, "GMT-02:00", "(GMT+02:00) Eastern European Time, Athens, Istanbul"               },
    { 10800, "GMT-03:00", "(GMT+03:00) Moscow"                                                },
    { 12600, "GMT-03:30", "(GMT+03:30) Tehran"                                                },
    { 14400, "GMT-04:00", "(GMT+04:00) Abu Dhabi, Muscat"                                     },
    { 16200, "GMT-04:30", "(GMT+04:30) Kabul"                                                 },
    { 18000, "GMT-05:00", "(GMT+05:00) Central Asia"                                          },
    { 19800, "GMT-05:30", "(GMT+05:30) Indian Standard Time"                                  },
    { 20700, "GMT-05:45", "(GMT+05:45) Kathmandu"                                             },
    { 21600, "GMT-06:00", "(GMT+06:00) Almaty, Novosibirsk, Astana, Dhaka"                    },
    { 23400, "GMT-06:30", "(GMT+06:30) Yangon (Rangoon)"                                      },
    { 25200, "GMT-07:00", "(GMT+07:00) Bangkok, Hanoi, Jakarta"                               },
    { 28800, "GMT-08:00", "(GMT+08:00) China, Australian Western Standard Time"               },
    { 32400, "GMT-09:00", "(GMT+09:00) Japan Standard Time"                                   },
    { 34200, "GMT-09:30", "(GMT+09:30) Australian Central Standard Time"                      },
    { 36000, "GMT-10:00", "(GMT+10:00) Australian Eastern Standard Time"                      },
    { 37800, "GMT-10:30", "(GMT+10:30) Lord Howe Island"                                      },
    { 39600, "GMT-11:00", "(GMT+11:00) Solomon Islands, New Caledonia"                        },
    { 43200, "GMT-12:00", "(GMT+12:00) Auckland, Fiji Islands"                                },
    { 46800, "GMT-13:00", "(GMT+13:00) Nuku'alofa"                                            }
};


gchar*   get_timezone(void);
gint     get_timezone_index(const char* tzname, gboolean* is_dst);
gboolean set_time_from_server(void);
void     set_time_utc(time_t utc_time);
gboolean set_timezone(const char* tzname, gboolean is_dst);

G_END_DECLS

#endif