Keep your time right
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/*-
* Copyright (c) 2017-2021 Carsten Sonne Larsen <cs@innolan.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef POSIXTZ_H_INCLUDED
#define POSIXTZ_H_INCLUDED
#include <time.h>
#include <stddef.h>
#include <stdbool.h>
#include <exec/types.h>
#include <devices/timer.h>
#define JulianDay 1
#define JulianDayLeap 2
#define DayWeekMonth 3
#define CustomTypeTimezone 1
#define PosixTypeTimezone 2
#define MAX_ABBR 10
#define MAX_TRANSITIONS 138
struct PosixTimezoneOffset
{
int sign; // before/after 00:00:00, -1 or 1
int hours; // hours before/after 00:00:00 [0:167]
int minutes; // minutes before/after 00:00:00 [0:59]
int seconds; // seconds before/after 00:00:00 [0:59]
};
struct PosixTransition
{
int type; // type of transistion [0:3]
int day; // day of year (leap or non-leap) [0:365]
int weekday; // day of week [0:6]
int week; // week of month [1:5]
int month; // month of year [1:12]
struct PosixTimezoneOffset offset;
};
struct PosixTransitionTime
{
bool isdst;
time_t time;
};
struct PosixLocalTimezone
{
char abbreviation[MAX_ABBR];
struct PosixTimezoneOffset offset;
};
struct PosixTimezone
{
int source; // time zone source [1:2]
struct PosixLocalTimezone current;
struct PosixLocalTimezone std;
struct PosixLocalTimezone dst;
struct PosixTransition start;
struct PosixTransition end;
struct PosixTransitionTime transitions[MAX_TRANSITIONS];
};
char *TimezoneSignChar(struct PosixLocalTimezone *);
struct PosixTimezone *InitPosixTimezone(char *);
void FreePosixTimezone(struct PosixTimezone *);
void SetPosixTimezone(struct PosixTimezone *, struct timeval *);
struct PosixTransitionTime *FindNextTransition(struct PosixTimezone *, struct timeval *);
#endif