1/**
 2 * This file has no copyright assigned and is placed in the Public Domain.
 3 * This file is part of the mingw-w64 runtime package.
 4 * No warranty is given; refer to the file DISCLAIMER.PD within this package.
 5 */
 6
 7#undef __MSVCRT_VERSION__
 8#define _UCRT
 9
10#include <time.h>
11
12// These are required to provide the unrepfixed data symbols "timezone"
13// and "tzname"; we can't remap "timezone" via a define due to clashes
14// with e.g. "struct timezone".
15typedef void __cdecl (*_tzset_func)(void);
16extern _tzset_func __MINGW_IMP_SYMBOL(_tzset);
17
18// Default initial values until _tzset has been called; these are the same
19// as the initial values in msvcrt/ucrtbase.
20static char initial_tzname0[] = "PST";
21static char initial_tzname1[] = "PDT";
22static char *initial_tznames[] = { initial_tzname0, initial_tzname1 };
23static long initial_timezone = 28800;
24static int initial_daylight = 1;
25char** __MINGW_IMP_SYMBOL(tzname) = initial_tznames;
26long * __MINGW_IMP_SYMBOL(timezone) = &initial_timezone;
27int * __MINGW_IMP_SYMBOL(daylight) = &initial_daylight;
28
29void __cdecl _tzset(void)
30{
31  __MINGW_IMP_SYMBOL(_tzset)();
32  // Redirect the __imp_ pointers to the actual data provided by the UCRT.
33  // From this point, the exposed values should stay in sync.
34  __MINGW_IMP_SYMBOL(tzname) = _tzname;
35  __MINGW_IMP_SYMBOL(timezone) = __timezone();
36  __MINGW_IMP_SYMBOL(daylight) = __daylight();
37}
38
39void __cdecl tzset(void)
40{
41  _tzset();
42}