2 * msvcrt.dll date/time functions
4 * Copyright 1996,1998 Marcus Meissner
5 * Copyright 1996 Jukka Iivonen
6 * Copyright 1997,2000 Uwe Bonnes
7 * Copyright 2000 Jon Griffiths
8 * Copyright 2004 Hans Leidekker
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
27 #define _POSIX_PTHREAD_SEMANTICS /* switch to a 2 arg style asctime_r on Solaris */
29 #ifdef HAVE_SYS_TIMES_H
30 # include <sys/times.h>
38 #include "wine/debug.h"
40 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
42 static const int MonthLengths[2][12] =
44 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
45 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
48 static inline int IsLeapYear(int Year)
50 return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0);
53 static inline void msvcrt_tm_to_unix( struct tm *dest, const struct MSVCRT_tm *src )
55 memset( dest, 0, sizeof(*dest) );
56 dest->tm_sec = src->tm_sec;
57 dest->tm_min = src->tm_min;
58 dest->tm_hour = src->tm_hour;
59 dest->tm_mday = src->tm_mday;
60 dest->tm_mon = src->tm_mon;
61 dest->tm_year = src->tm_year;
62 dest->tm_wday = src->tm_wday;
63 dest->tm_yday = src->tm_yday;
64 dest->tm_isdst = src->tm_isdst;
67 static inline void unix_tm_to_msvcrt( struct MSVCRT_tm *dest, const struct tm *src )
69 memset( dest, 0, sizeof(*dest) );
70 dest->tm_sec = src->tm_sec;
71 dest->tm_min = src->tm_min;
72 dest->tm_hour = src->tm_hour;
73 dest->tm_mday = src->tm_mday;
74 dest->tm_mon = src->tm_mon;
75 dest->tm_year = src->tm_year;
76 dest->tm_wday = src->tm_wday;
77 dest->tm_yday = src->tm_yday;
78 dest->tm_isdst = src->tm_isdst;
81 #define SECSPERDAY 86400
82 /* 1601 to 1970 is 369 years plus 89 leap days */
83 #define SECS_1601_TO_1970 ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
84 #define TICKSPERSEC 10000000
85 #define TICKSPERMSEC 10000
86 #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
88 /**********************************************************************
89 * _mktime64 (MSVCRT.@)
91 MSVCRT___time64_t CDECL MSVCRT__mktime64(struct MSVCRT_tm *mstm)
96 msvcrt_tm_to_unix( &tm, mstm );
98 unix_tm_to_msvcrt( mstm, &tm );
100 return secs < 0 ? -1 : secs;
103 /**********************************************************************
104 * _mktime32 (MSVCRT.@)
106 MSVCRT___time32_t CDECL MSVCRT__mktime32(struct MSVCRT_tm *mstm)
108 return MSVCRT__mktime64( mstm );
111 /**********************************************************************
115 MSVCRT___time64_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
117 return MSVCRT__mktime64( mstm );
120 MSVCRT___time32_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
122 return MSVCRT__mktime32( mstm );
126 /**********************************************************************
127 * _mkgmtime64 (MSVCRT.@)
129 * time->tm_isdst value is ignored
131 MSVCRT___time64_t CDECL MSVCRT__mkgmtime64(struct MSVCRT_tm *time)
135 MSVCRT___time64_t ret;
138 st.wMilliseconds = 0;
139 st.wSecond = time->tm_sec;
140 st.wMinute = time->tm_min;
141 st.wHour = time->tm_hour;
142 st.wDay = time->tm_mday;
143 st.wMonth = time->tm_mon+1;
144 st.wYear = time->tm_year+1900;
146 if(!SystemTimeToFileTime(&st, &ft))
149 FileTimeToSystemTime(&ft, &st);
150 time->tm_wday = st.wDayOfWeek;
152 for(i=time->tm_yday=0; i<st.wMonth-1; i++)
153 time->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
154 time->tm_yday += st.wDay-1;
156 ret = ((MSVCRT___time64_t)ft.dwHighDateTime<<32)+ft.dwLowDateTime;
157 ret = (ret-TICKS_1601_TO_1970)/TICKSPERSEC;
161 /**********************************************************************
162 * _mkgmtime32 (MSVCRT.@)
164 MSVCRT___time32_t CDECL MSVCRT__mkgmtime32(struct MSVCRT_tm *time)
166 return MSVCRT__mkgmtime64(time);
169 /**********************************************************************
170 * _mkgmtime (MSVCRT.@)
173 MSVCRT___time64_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
175 return MSVCRT__mkgmtime64(time);
178 MSVCRT___time32_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
180 return MSVCRT__mkgmtime32(time);
184 /*********************************************************************
185 * _localtime64 (MSVCRT.@)
187 struct MSVCRT_tm* CDECL MSVCRT__localtime64(const MSVCRT___time64_t* secs)
191 time_t seconds = *secs;
193 if (seconds < 0) return NULL;
196 if (!(tm = localtime( &seconds))) {
197 _munlock(_TIME_LOCK);
201 data = msvcrt_get_thread_data();
202 unix_tm_to_msvcrt( &data->time_buffer, tm );
203 _munlock(_TIME_LOCK);
205 return &data->time_buffer;
208 /*********************************************************************
209 * _localtime32 (MSVCRT.@)
211 struct MSVCRT_tm* CDECL MSVCRT__localtime32(const MSVCRT___time32_t* secs)
213 MSVCRT___time64_t secs64 = *secs;
214 return MSVCRT__localtime64( &secs64 );
217 /*********************************************************************
218 * localtime (MSVCRT.@)
221 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time64_t* secs)
223 return MSVCRT__localtime64( secs );
226 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time32_t* secs)
228 return MSVCRT__localtime32( secs );
232 /*********************************************************************
233 * _gmtime64 (MSVCRT.@)
235 struct MSVCRT_tm* CDECL MSVCRT__gmtime64(const MSVCRT___time64_t* secs)
237 thread_data_t * const data = msvcrt_get_thread_data();
242 ULONGLONG time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
244 ft.dwHighDateTime = (UINT)(time >> 32);
245 ft.dwLowDateTime = (UINT)time;
247 FileTimeToSystemTime(&ft, &st);
249 if (st.wYear < 1970) return NULL;
251 data->time_buffer.tm_sec = st.wSecond;
252 data->time_buffer.tm_min = st.wMinute;
253 data->time_buffer.tm_hour = st.wHour;
254 data->time_buffer.tm_mday = st.wDay;
255 data->time_buffer.tm_year = st.wYear - 1900;
256 data->time_buffer.tm_mon = st.wMonth - 1;
257 data->time_buffer.tm_wday = st.wDayOfWeek;
258 for (i = data->time_buffer.tm_yday = 0; i < st.wMonth - 1; i++) {
259 data->time_buffer.tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
262 data->time_buffer.tm_yday += st.wDay - 1;
263 data->time_buffer.tm_isdst = 0;
265 return &data->time_buffer;
268 /*********************************************************************
269 * _gmtime32 (MSVCRT.@)
271 struct MSVCRT_tm* CDECL MSVCRT__gmtime32(const MSVCRT___time32_t* secs)
273 MSVCRT___time64_t secs64 = *secs;
274 return MSVCRT__gmtime64( &secs64 );
277 /*********************************************************************
281 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time64_t* secs)
283 return MSVCRT__gmtime64( secs );
286 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time32_t* secs)
288 return MSVCRT__gmtime32( secs );
292 /**********************************************************************
293 * _strdate (MSVCRT.@)
295 char* CDECL _strdate(char* date)
297 static const char format[] = "MM'/'dd'/'yy";
299 GetDateFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
304 /**********************************************************************
305 * _strdate_s (MSVCRT.@)
307 int CDECL _strdate_s(char* date, MSVCRT_size_t size)
313 *MSVCRT__errno() = MSVCRT_EINVAL;
314 return MSVCRT_EINVAL;
318 *MSVCRT__errno() = MSVCRT_ERANGE;
319 return MSVCRT_ERANGE;
326 /**********************************************************************
327 * _wstrdate (MSVCRT.@)
329 MSVCRT_wchar_t* CDECL _wstrdate(MSVCRT_wchar_t* date)
331 static const WCHAR format[] = { 'M','M','\'','/','\'','d','d','\'','/','\'','y','y',0 };
333 GetDateFormatW(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
338 /**********************************************************************
339 * _wstrdate_s (MSVCRT.@)
341 int CDECL _wstrdate_s(MSVCRT_wchar_t* date, MSVCRT_size_t size)
347 *MSVCRT__errno() = MSVCRT_EINVAL;
348 return MSVCRT_EINVAL;
352 *MSVCRT__errno() = MSVCRT_ERANGE;
353 return MSVCRT_ERANGE;
360 /*********************************************************************
361 * _strtime (MSVCRT.@)
363 char* CDECL _strtime(char* time)
365 static const char format[] = "HH':'mm':'ss";
367 GetTimeFormatA(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
372 /*********************************************************************
373 * _strtime_s (MSVCRT.@)
375 int CDECL _strtime_s(char* time, MSVCRT_size_t size)
381 *MSVCRT__errno() = MSVCRT_EINVAL;
382 return MSVCRT_EINVAL;
386 *MSVCRT__errno() = MSVCRT_ERANGE;
387 return MSVCRT_ERANGE;
394 /*********************************************************************
395 * _wstrtime (MSVCRT.@)
397 MSVCRT_wchar_t* CDECL _wstrtime(MSVCRT_wchar_t* time)
399 static const WCHAR format[] = { 'H','H','\'',':','\'','m','m','\'',':','\'','s','s',0 };
401 GetTimeFormatW(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
406 /*********************************************************************
407 * _wstrtime_s (MSVCRT.@)
409 int CDECL _wstrtime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size)
415 *MSVCRT__errno() = MSVCRT_EINVAL;
416 return MSVCRT_EINVAL;
420 *MSVCRT__errno() = MSVCRT_ERANGE;
421 return MSVCRT_ERANGE;
428 /*********************************************************************
431 MSVCRT_clock_t CDECL MSVCRT_clock(void)
433 FILETIME ftc, fte, ftk, ftu;
434 ULONGLONG utime, ktime;
436 MSVCRT_clock_t clock;
438 GetProcessTimes(GetCurrentProcess(), &ftc, &fte, &ftk, &ftu);
440 ktime = ((ULONGLONG)ftk.dwHighDateTime << 32) | ftk.dwLowDateTime;
441 utime = ((ULONGLONG)ftu.dwHighDateTime << 32) | ftu.dwLowDateTime;
443 clock = (utime + ktime) / (TICKSPERSEC / MSVCRT_CLOCKS_PER_SEC);
448 /*********************************************************************
449 * _difftime64 (MSVCRT.@)
451 double CDECL MSVCRT__difftime64(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
453 return (double)(time1 - time2);
456 /*********************************************************************
457 * _difftime32 (MSVCRT.@)
459 double CDECL MSVCRT__difftime32(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
461 return (double)(time1 - time2);
464 /*********************************************************************
465 * difftime (MSVCRT.@)
468 double CDECL MSVCRT_difftime(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
470 return MSVCRT__difftime64( time1, time2 );
473 double CDECL MSVCRT_difftime(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
475 return MSVCRT__difftime32( time1, time2 );
479 /*********************************************************************
480 * _ftime64 (MSVCRT.@)
482 void CDECL MSVCRT__ftime64(struct MSVCRT___timeb64 *buf)
484 TIME_ZONE_INFORMATION tzinfo;
488 DWORD tzid = GetTimeZoneInformation(&tzinfo);
489 GetSystemTimeAsFileTime(&ft);
491 time = ((ULONGLONG)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
493 buf->time = time / TICKSPERSEC - SECS_1601_TO_1970;
494 buf->millitm = (time % TICKSPERSEC) / TICKSPERMSEC;
495 buf->timezone = tzinfo.Bias +
496 ( tzid == TIME_ZONE_ID_STANDARD ? tzinfo.StandardBias :
497 ( tzid == TIME_ZONE_ID_DAYLIGHT ? tzinfo.DaylightBias : 0 ));
498 buf->dstflag = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
501 /*********************************************************************
502 * _ftime32 (MSVCRT.@)
504 void CDECL MSVCRT__ftime32(struct MSVCRT___timeb32 *buf)
506 struct MSVCRT___timeb64 buf64;
508 MSVCRT__ftime64( &buf64 );
509 buf->time = buf64.time;
510 buf->millitm = buf64.millitm;
511 buf->timezone = buf64.timezone;
512 buf->dstflag = buf64.dstflag;
515 /*********************************************************************
519 void CDECL MSVCRT__ftime(struct MSVCRT___timeb64 *buf)
521 return MSVCRT__ftime64( buf );
524 void CDECL MSVCRT__ftime(struct MSVCRT___timeb32 *buf)
526 return MSVCRT__ftime32( buf );
530 /*********************************************************************
533 MSVCRT___time64_t CDECL MSVCRT__time64(MSVCRT___time64_t *buf)
535 MSVCRT___time64_t curtime;
536 struct MSVCRT___timeb64 tb;
538 MSVCRT__ftime64(&tb);
541 return buf ? *buf = curtime : curtime;
544 /*********************************************************************
547 MSVCRT___time32_t CDECL MSVCRT__time32(MSVCRT___time32_t *buf)
549 MSVCRT___time32_t curtime;
550 struct MSVCRT___timeb64 tb;
552 MSVCRT__ftime64(&tb);
555 return buf ? *buf = curtime : curtime;
558 /*********************************************************************
562 MSVCRT___time64_t CDECL MSVCRT_time(MSVCRT___time64_t* buf)
564 return MSVCRT__time64( buf );
567 MSVCRT___time32_t CDECL MSVCRT_time(MSVCRT___time32_t* buf)
569 return MSVCRT__time32( buf );
573 /*********************************************************************
574 * _daylight (MSVCRT.@)
576 int MSVCRT___daylight = 0;
578 /*********************************************************************
579 * __p_daylight (MSVCRT.@)
581 int * CDECL MSVCRT___p__daylight(void)
583 return &MSVCRT___daylight;
586 /*********************************************************************
587 * _dstbias (MSVCRT.@)
589 int MSVCRT__dstbias = 0;
591 /*********************************************************************
592 * __p_dstbias (MSVCRT.@)
594 int * CDECL __p__dstbias(void)
596 return &MSVCRT__dstbias;
599 /*********************************************************************
600 * _timezone (MSVCRT.@)
602 MSVCRT_long MSVCRT___timezone = 0;
604 /*********************************************************************
605 * __p_timezone (MSVCRT.@)
607 MSVCRT_long * CDECL MSVCRT___p__timezone(void)
609 return &MSVCRT___timezone;
612 /*********************************************************************
615 * Some apps (notably Mozilla) insist on writing to these, so the buffer
616 * must be large enough. The size is picked based on observation of
619 static char tzname_std[64] = "";
620 static char tzname_dst[64] = "";
621 char *MSVCRT__tzname[2] = { tzname_std, tzname_dst };
623 /*********************************************************************
624 * __p_tzname (MSVCRT.@)
626 char ** CDECL __p__tzname(void)
628 return MSVCRT__tzname;
631 /*********************************************************************
634 void CDECL MSVCRT__tzset(void)
637 #if defined(HAVE_TIMEZONE) && defined(HAVE_DAYLIGHT)
638 MSVCRT___daylight = daylight;
639 MSVCRT___timezone = timezone;
642 static const time_t seconds_in_year = (365 * 24 + 6) * 3600;
645 int zone_january, zone_july;
648 t = (time(NULL) / seconds_in_year) * seconds_in_year;
650 zone_january = -tmp->tm_gmtoff;
651 t += seconds_in_year / 2;
653 zone_july = -tmp->tm_gmtoff;
654 _munlock(_TIME_LOCK);
656 MSVCRT___daylight = (zone_january != zone_july);
657 MSVCRT___timezone = max(zone_january, zone_july);
660 lstrcpynA(tzname_std, tzname[0], sizeof(tzname_std));
661 tzname_std[sizeof(tzname_std) - 1] = '\0';
662 lstrcpynA(tzname_dst, tzname[1], sizeof(tzname_dst));
663 tzname_dst[sizeof(tzname_dst) - 1] = '\0';
666 /*********************************************************************
667 * strftime (MSVCRT.@)
669 MSVCRT_size_t CDECL MSVCRT_strftime( char *str, MSVCRT_size_t max, const char *format,
670 const struct MSVCRT_tm *mstm )
674 msvcrt_tm_to_unix( &tm, mstm );
675 return strftime( str, max, format, &tm );
678 /*********************************************************************
679 * wcsftime (MSVCRT.@)
681 MSVCRT_size_t CDECL MSVCRT_wcsftime( MSVCRT_wchar_t *str, MSVCRT_size_t max,
682 const MSVCRT_wchar_t *format, const struct MSVCRT_tm *mstm )
687 TRACE("%p %ld %s %p\n", str, max, debugstr_w(format), mstm );
689 len = WideCharToMultiByte( CP_UNIXCP, 0, format, -1, NULL, 0, NULL, NULL );
690 if (!(fmt = MSVCRT_malloc( len ))) return 0;
691 WideCharToMultiByte( CP_UNIXCP, 0, format, -1, fmt, len, NULL, NULL );
693 if ((s = MSVCRT_malloc( max*4 )))
696 msvcrt_tm_to_unix( &tm, mstm );
697 if (!strftime( s, max*4, fmt, &tm )) s[0] = 0;
698 len = MultiByteToWideChar( CP_UNIXCP, 0, s, -1, str, max );
708 /*********************************************************************
711 char * CDECL MSVCRT_asctime(const struct MSVCRT_tm *mstm)
713 thread_data_t *data = msvcrt_get_thread_data();
716 msvcrt_tm_to_unix( &tm, mstm );
718 if (!data->asctime_buffer)
719 data->asctime_buffer = MSVCRT_malloc( 30 ); /* ought to be enough */
721 /* FIXME: may want to map from Unix codepage to CP_ACP */
722 #ifdef HAVE_ASCTIME_R
723 asctime_r( &tm, data->asctime_buffer );
725 strcpy( data->asctime_buffer, asctime(&tm) );
727 return data->asctime_buffer;
730 /*********************************************************************
731 * _wasctime (MSVCRT.@)
733 MSVCRT_wchar_t * CDECL MSVCRT__wasctime(const struct MSVCRT_tm *mstm)
735 thread_data_t *data = msvcrt_get_thread_data();
739 msvcrt_tm_to_unix( &tm, mstm );
741 if (!data->wasctime_buffer)
742 data->wasctime_buffer = MSVCRT_malloc( 30*sizeof(MSVCRT_wchar_t) ); /* ought to be enough */
743 #ifdef HAVE_ASCTIME_R
744 asctime_r( &tm, buffer );
746 strcpy( buffer, asctime(&tm) );
748 MultiByteToWideChar( CP_UNIXCP, 0, buffer, -1, data->wasctime_buffer, 30 );
749 return data->wasctime_buffer;
752 /*********************************************************************
753 * _ctime64 (MSVCRT.@)
755 char * CDECL MSVCRT__ctime64(const MSVCRT___time64_t *time)
758 t = MSVCRT__localtime64( time );
760 return MSVCRT_asctime( t );
763 /*********************************************************************
764 * _ctime32 (MSVCRT.@)
766 char * CDECL MSVCRT__ctime32(const MSVCRT___time32_t *time)
769 t = MSVCRT__localtime32( time );
771 return MSVCRT_asctime( t );
774 /*********************************************************************
778 char * CDECL MSVCRT_ctime(const MSVCRT___time64_t *time)
780 return MSVCRT__ctime64( time );
783 char * CDECL MSVCRT_ctime(const MSVCRT___time32_t *time)
785 return MSVCRT__ctime32( time );
789 /*********************************************************************
790 * _wctime64 (MSVCRT.@)
792 MSVCRT_wchar_t * CDECL MSVCRT__wctime64(const MSVCRT___time64_t *time)
794 return MSVCRT__wasctime( MSVCRT__localtime64(time) );
797 /*********************************************************************
798 * _wctime32 (MSVCRT.@)
800 MSVCRT_wchar_t * CDECL MSVCRT__wctime32(const MSVCRT___time32_t *time)
802 return MSVCRT__wasctime( MSVCRT__localtime32(time) );
805 /*********************************************************************
809 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time64_t *time)
811 return MSVCRT__wctime64( time );
814 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time32_t *time)
816 return MSVCRT__wctime32( time );