winpr/libwinpr/timezone/timezone.c File Reference

#include <winpr/config.h>
#include <winpr/environment.h>
#include <winpr/wtypes.h>
#include <winpr/timezone.h>
#include <winpr/crt.h>
#include <winpr/assert.h>
#include <winpr/file.h>
#include "../log.h"
#include "TimeZoneNameMap.h"
#include "TimeZoneIanaAbbrevMap.h"
#include <time.h>
#include <unistd.h>

Macros
#define	TAG   WINPR_TAG("timezone")
#define	MIN(x, y)   (((x) < (y)) ? (x) : (y))
#define	log_timezone(tzif, result)   log_timezone_((tzif), (result), __FILE__, __func__, __LINE__)

Enumerations
enum	dyn_transition_result { HAVE_TRANSITION_DATES = 0 , HAVE_NO_STANDARD_TRANSITION_DATE = 1 , HAVE_NO_DAYLIGHT_TRANSITION_DATE = 2 }

Functions
static char *	winpr_read_unix_timezone_identifier_from_file (FILE *fp)
static char *	winpr_get_timezone_from_link (const char *links[], size_t count)
static char *	winpr_get_unix_timezone_identifier_from_file (void)
static char *	winpr_time_zone_from_env (void)
static char *	winpr_translate_time_zone (const char *tzid)
static char *	winpr_guess_time_zone (void)
static SYSTEMTIME	tm2systemtime (const struct tm *t)
static struct tm	systemtime2tm (const SYSTEMTIME *st)
static LONG	get_gmtoff_min (const struct tm *t)
static struct tm	next_day (const struct tm *start)
static struct tm	adjust_time (const struct tm *start, int hour, int minute)
static WORD	get_transition_weekday_occurrence (const SYSTEMTIME *st)
static SYSTEMTIME	tm2transitiontime (const struct tm *cur)
static SYSTEMTIME	get_transition_time (const struct tm *start, BOOL toDst)
static BOOL	get_transition_date (const struct tm *start, BOOL toDst, SYSTEMTIME *pdate)
static LONG	get_bias (const struct tm *start, BOOL dstBias)
static BOOL	map_iana_id (const char *iana, LPDYNAMIC_TIME_ZONE_INFORMATION tz)
static const char *	weekday2str (WORD wDayOfWeek)
static char *	systemtime2str (const SYSTEMTIME *t, char *buffer, size_t len)
static void	log_print (wLog *log, DWORD level, const char *file, const char *fkt, size_t line,...)
static void	log_timezone_ (const DYNAMIC_TIME_ZONE_INFORMATION *tzif, DWORD result, const char *file, const char *fkt, size_t line)
DWORD	GetTimeZoneInformation (LPTIME_ZONE_INFORMATION lpTimeZoneInformation)
BOOL	SetTimeZoneInformation (const TIME_ZONE_INFORMATION *lpTimeZoneInformation)
BOOL	SystemTimeToFileTime (const SYSTEMTIME *lpSystemTime, LPFILETIME lpFileTime)
BOOL	FileTimeToSystemTime (const FILETIME *lpFileTime, LPSYSTEMTIME lpSystemTime)
BOOL	SystemTimeToTzSpecificLocalTime (LPTIME_ZONE_INFORMATION lpTimeZone, LPSYSTEMTIME lpUniversalTime, LPSYSTEMTIME lpLocalTime)
BOOL	TzSpecificLocalTimeToSystemTime (LPTIME_ZONE_INFORMATION lpTimeZoneInformation, LPSYSTEMTIME lpLocalTime, LPSYSTEMTIME lpUniversalTime)
static int	dynamic_time_zone_from_localtime (const struct tm *local_time, PDYNAMIC_TIME_ZONE_INFORMATION tz)
DWORD	GetDynamicTimeZoneInformation (PDYNAMIC_TIME_ZONE_INFORMATION tz)
BOOL	SetDynamicTimeZoneInformation (const DYNAMIC_TIME_ZONE_INFORMATION *lpTimeZoneInformation)
BOOL	GetTimeZoneInformationForYear (USHORT wYear, PDYNAMIC_TIME_ZONE_INFORMATION pdtzi, LPTIME_ZONE_INFORMATION ptzi)
BOOL	SystemTimeToTzSpecificLocalTimeEx (const DYNAMIC_TIME_ZONE_INFORMATION *lpTimeZoneInformation, const SYSTEMTIME *lpUniversalTime, LPSYSTEMTIME lpLocalTime)
BOOL	TzSpecificLocalTimeToSystemTimeEx (const DYNAMIC_TIME_ZONE_INFORMATION *lpTimeZoneInformation, const SYSTEMTIME *lpLocalTime, LPSYSTEMTIME lpUniversalTime)
DWORD	EnumDynamicTimeZoneInformation (const DWORD dwIndex, PDYNAMIC_TIME_ZONE_INFORMATION lpTimeZoneInformation)
DWORD	GetDynamicTimeZoneInformationEffectiveYears (const PDYNAMIC_TIME_ZONE_INFORMATION lpTimeZoneInformation, LPDWORD FirstYear, LPDWORD LastYear)

Macro Definition Documentation

log_timezone

#define log_timezone	(		tzif,
			result
	)		log_timezone_((tzif), (result), __FILE__, __func__, __LINE__)

MIN

#define MIN	(		x,
			y
	)		(((x) < (y)) ? (x) : (y))

TAG

#define TAG   WINPR_TAG("timezone")

WinPR: Windows Portable Runtime Time Zone

Copyright 2012 Marc-Andre Moreau marca.nosp@m.ndre.nosp@m..more.nosp@m.au@g.nosp@m.mail..nosp@m.com Copyright 2024 Armin Novak anova.nosp@m.k@th.nosp@m.incas.nosp@m.t.co.nosp@m.m Copyright 2024 Thincast Technologies GmbH

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Enumeration Type Documentation

dyn_transition_result

enum dyn_transition_result

Enumerator
HAVE_TRANSITION_DATES
HAVE_NO_STANDARD_TRANSITION_DATE
HAVE_NO_DAYLIGHT_TRANSITION_DATE

Function Documentation

adjust_time()

static struct tm adjust_time ( const struct tm *  start, int  hour, int  minute  )

static

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dynamic_time_zone_from_localtime()

static int dynamic_time_zone_from_localtime ( const struct tm *  local_time, PDYNAMIC_TIME_ZONE_INFORMATION  tz  )

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EnumDynamicTimeZoneInformation()

DWORD EnumDynamicTimeZoneInformation	(	const DWORD	dwIndex,
		PDYNAMIC_TIME_ZONE_INFORMATION	lpTimeZoneInformation
	)

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FileTimeToSystemTime()

BOOL FileTimeToSystemTime	(	const FILETIME *	lpFileTime,
		LPSYSTEMTIME	lpSystemTime
	)

get_bias()

static LONG get_bias ( const struct tm *  start, BOOL  dstBias  )

static

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get_gmtoff_min()

static LONG get_gmtoff_min ( const struct tm *  t )

static

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get_transition_date()

static BOOL get_transition_date ( const struct tm *  start, BOOL  toDst, SYSTEMTIME *  pdate  )

static

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get_transition_time()

static SYSTEMTIME get_transition_time ( const struct tm *  start, BOOL  toDst  )

static

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get_transition_weekday_occurrence()

static WORD get_transition_weekday_occurrence ( const SYSTEMTIME *  st )

static

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GetDynamicTimeZoneInformation()

DWORD GetDynamicTimeZoneInformation

(

PDYNAMIC_TIME_ZONE_INFORMATION

tz

)

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GetDynamicTimeZoneInformationEffectiveYears()

DWORD GetDynamicTimeZoneInformationEffectiveYears	(	const PDYNAMIC_TIME_ZONE_INFORMATION	lpTimeZoneInformation,
		LPDWORD	FirstYear,
		LPDWORD	LastYear
	)

GetTimeZoneInformation()

DWORD GetTimeZoneInformation

(

LPTIME_ZONE_INFORMATION

lpTimeZoneInformation

)

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GetTimeZoneInformationForYear()

BOOL GetTimeZoneInformationForYear	(	USHORT	wYear,
		PDYNAMIC_TIME_ZONE_INFORMATION	pdtzi,
		LPTIME_ZONE_INFORMATION	ptzi
	)

log_print()

static void log_print ( wLog *  log, DWORD  level, const char *  file, const char *  fkt, size_t  line,   ...  )

static

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log_timezone_()

static void log_timezone_ ( const DYNAMIC_TIME_ZONE_INFORMATION *  tzif, DWORD  result, const char *  file, const char *  fkt, size_t  line  )

static

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map_iana_id()

static BOOL map_iana_id ( const char *  iana, LPDYNAMIC_TIME_ZONE_INFORMATION  tz  )

static

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next_day()

static struct tm next_day ( const struct tm *  start )

static

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SetDynamicTimeZoneInformation()

BOOL SetDynamicTimeZoneInformation

(

const DYNAMIC_TIME_ZONE_INFORMATION *

lpTimeZoneInformation

)

SetTimeZoneInformation()

BOOL SetTimeZoneInformation

(

const TIME_ZONE_INFORMATION *

lpTimeZoneInformation

)

systemtime2str()

static char* systemtime2str ( const SYSTEMTIME *  t, char *  buffer, size_t  len  )

static

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systemtime2tm()

static struct tm systemtime2tm ( const SYSTEMTIME *  st )

static

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SystemTimeToFileTime()

BOOL SystemTimeToFileTime	(	const SYSTEMTIME *	lpSystemTime,
		LPFILETIME	lpFileTime
	)

SystemTimeToTzSpecificLocalTime()

BOOL SystemTimeToTzSpecificLocalTime	(	LPTIME_ZONE_INFORMATION	lpTimeZone,
		LPSYSTEMTIME	lpUniversalTime,
		LPSYSTEMTIME	lpLocalTime
	)

SystemTimeToTzSpecificLocalTimeEx()

BOOL SystemTimeToTzSpecificLocalTimeEx	(	const DYNAMIC_TIME_ZONE_INFORMATION *	lpTimeZoneInformation,
		const SYSTEMTIME *	lpUniversalTime,
		LPSYSTEMTIME	lpLocalTime
	)

tm2systemtime()

static SYSTEMTIME tm2systemtime ( const struct tm *  t )

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tm2transitiontime()

static SYSTEMTIME tm2transitiontime ( const struct tm *  cur )

static

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TzSpecificLocalTimeToSystemTime()

BOOL TzSpecificLocalTimeToSystemTime	(	LPTIME_ZONE_INFORMATION	lpTimeZoneInformation,
		LPSYSTEMTIME	lpLocalTime,
		LPSYSTEMTIME	lpUniversalTime
	)

TzSpecificLocalTimeToSystemTimeEx()

BOOL TzSpecificLocalTimeToSystemTimeEx	(	const DYNAMIC_TIME_ZONE_INFORMATION *	lpTimeZoneInformation,
		const SYSTEMTIME *	lpLocalTime,
		LPSYSTEMTIME	lpUniversalTime
	)

weekday2str()

static const char* weekday2str ( WORD  wDayOfWeek )

static

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winpr_get_timezone_from_link()

static char* winpr_get_timezone_from_link ( const char *  links[], size_t  count  )

static

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winpr_get_unix_timezone_identifier_from_file()

static char* winpr_get_unix_timezone_identifier_from_file ( void  )

static

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winpr_guess_time_zone()

static char* winpr_guess_time_zone ( void  )

static

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winpr_read_unix_timezone_identifier_from_file()

static char* winpr_read_unix_timezone_identifier_from_file ( FILE *  fp )

static

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winpr_time_zone_from_env()

static char* winpr_time_zone_from_env ( void  )

static

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winpr_translate_time_zone()

static char* winpr_translate_time_zone ( const char *  tzid )

static

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