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 int CDECL MSVCRT__gmtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
242 if(!res || !secs || *secs<0) {
255 *MSVCRT__errno() = MSVCRT_EINVAL;
256 return MSVCRT_EINVAL;
259 time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
261 ft.dwHighDateTime = (UINT)(time >> 32);
262 ft.dwLowDateTime = (UINT)time;
264 FileTimeToSystemTime(&ft, &st);
266 res->tm_sec = st.wSecond;
267 res->tm_min = st.wMinute;
268 res->tm_hour = st.wHour;
269 res->tm_mday = st.wDay;
270 res->tm_year = st.wYear - 1900;
271 res->tm_mon = st.wMonth - 1;
272 res->tm_wday = st.wDayOfWeek;
273 for (i = res->tm_yday = 0; i < st.wMonth - 1; i++) {
274 res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
277 res->tm_yday += st.wDay - 1;
283 /*********************************************************************
284 * _gmtime64 (MSVCRT.@)
286 struct MSVCRT_tm* CDECL MSVCRT__gmtime64(const MSVCRT___time64_t *secs)
288 thread_data_t * const data = msvcrt_get_thread_data();
290 if(MSVCRT__gmtime64_s(&data->time_buffer, secs))
292 return &data->time_buffer;
295 /*********************************************************************
296 * _gmtime32_s (MSVCRT.@)
298 int CDECL MSVCRT__gmtime32_s(struct MSVCRT_tm *res, const MSVCRT___time32_t *secs)
300 MSVCRT___time64_t secs64;
304 return MSVCRT__gmtime64_s(res, &secs64);
306 return MSVCRT__gmtime64_s(res, NULL);
309 /*********************************************************************
310 * _gmtime32 (MSVCRT.@)
312 struct MSVCRT_tm* CDECL MSVCRT__gmtime32(const MSVCRT___time32_t* secs)
314 MSVCRT___time64_t secs64;
320 return MSVCRT__gmtime64( &secs64 );
323 /*********************************************************************
327 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time64_t* secs)
329 return MSVCRT__gmtime64( secs );
332 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time32_t* secs)
334 return MSVCRT__gmtime32( secs );
338 /**********************************************************************
339 * _strdate (MSVCRT.@)
341 char* CDECL _strdate(char* date)
343 static const char format[] = "MM'/'dd'/'yy";
345 GetDateFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
350 /**********************************************************************
351 * _strdate_s (MSVCRT.@)
353 int CDECL _strdate_s(char* date, MSVCRT_size_t size)
359 *MSVCRT__errno() = MSVCRT_EINVAL;
360 return MSVCRT_EINVAL;
364 *MSVCRT__errno() = MSVCRT_ERANGE;
365 return MSVCRT_ERANGE;
372 /**********************************************************************
373 * _wstrdate (MSVCRT.@)
375 MSVCRT_wchar_t* CDECL _wstrdate(MSVCRT_wchar_t* date)
377 static const WCHAR format[] = { 'M','M','\'','/','\'','d','d','\'','/','\'','y','y',0 };
379 GetDateFormatW(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
384 /**********************************************************************
385 * _wstrdate_s (MSVCRT.@)
387 int CDECL _wstrdate_s(MSVCRT_wchar_t* date, MSVCRT_size_t size)
393 *MSVCRT__errno() = MSVCRT_EINVAL;
394 return MSVCRT_EINVAL;
398 *MSVCRT__errno() = MSVCRT_ERANGE;
399 return MSVCRT_ERANGE;
406 /*********************************************************************
407 * _strtime (MSVCRT.@)
409 char* CDECL _strtime(char* time)
411 static const char format[] = "HH':'mm':'ss";
413 GetTimeFormatA(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
418 /*********************************************************************
419 * _strtime_s (MSVCRT.@)
421 int CDECL _strtime_s(char* time, MSVCRT_size_t size)
427 *MSVCRT__errno() = MSVCRT_EINVAL;
428 return MSVCRT_EINVAL;
432 *MSVCRT__errno() = MSVCRT_ERANGE;
433 return MSVCRT_ERANGE;
440 /*********************************************************************
441 * _wstrtime (MSVCRT.@)
443 MSVCRT_wchar_t* CDECL _wstrtime(MSVCRT_wchar_t* time)
445 static const WCHAR format[] = { 'H','H','\'',':','\'','m','m','\'',':','\'','s','s',0 };
447 GetTimeFormatW(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
452 /*********************************************************************
453 * _wstrtime_s (MSVCRT.@)
455 int CDECL _wstrtime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size)
461 *MSVCRT__errno() = MSVCRT_EINVAL;
462 return MSVCRT_EINVAL;
466 *MSVCRT__errno() = MSVCRT_ERANGE;
467 return MSVCRT_ERANGE;
474 /*********************************************************************
477 MSVCRT_clock_t CDECL MSVCRT_clock(void)
479 FILETIME ftc, fte, ftk, ftu;
480 ULONGLONG utime, ktime;
482 MSVCRT_clock_t clock;
484 GetProcessTimes(GetCurrentProcess(), &ftc, &fte, &ftk, &ftu);
486 ktime = ((ULONGLONG)ftk.dwHighDateTime << 32) | ftk.dwLowDateTime;
487 utime = ((ULONGLONG)ftu.dwHighDateTime << 32) | ftu.dwLowDateTime;
489 clock = (utime + ktime) / (TICKSPERSEC / MSVCRT_CLOCKS_PER_SEC);
494 /*********************************************************************
495 * _difftime64 (MSVCRT.@)
497 double CDECL MSVCRT__difftime64(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
499 return (double)(time1 - time2);
502 /*********************************************************************
503 * _difftime32 (MSVCRT.@)
505 double CDECL MSVCRT__difftime32(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
507 return (double)(time1 - time2);
510 /*********************************************************************
511 * difftime (MSVCRT.@)
514 double CDECL MSVCRT_difftime(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
516 return MSVCRT__difftime64( time1, time2 );
519 double CDECL MSVCRT_difftime(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
521 return MSVCRT__difftime32( time1, time2 );
525 /*********************************************************************
526 * _ftime64 (MSVCRT.@)
528 void CDECL MSVCRT__ftime64(struct MSVCRT___timeb64 *buf)
530 TIME_ZONE_INFORMATION tzinfo;
534 DWORD tzid = GetTimeZoneInformation(&tzinfo);
535 GetSystemTimeAsFileTime(&ft);
537 time = ((ULONGLONG)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
539 buf->time = time / TICKSPERSEC - SECS_1601_TO_1970;
540 buf->millitm = (time % TICKSPERSEC) / TICKSPERMSEC;
541 buf->timezone = tzinfo.Bias +
542 ( tzid == TIME_ZONE_ID_STANDARD ? tzinfo.StandardBias :
543 ( tzid == TIME_ZONE_ID_DAYLIGHT ? tzinfo.DaylightBias : 0 ));
544 buf->dstflag = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
547 /*********************************************************************
548 * _ftime32 (MSVCRT.@)
550 void CDECL MSVCRT__ftime32(struct MSVCRT___timeb32 *buf)
552 struct MSVCRT___timeb64 buf64;
554 MSVCRT__ftime64( &buf64 );
555 buf->time = buf64.time;
556 buf->millitm = buf64.millitm;
557 buf->timezone = buf64.timezone;
558 buf->dstflag = buf64.dstflag;
561 /*********************************************************************
565 void CDECL MSVCRT__ftime(struct MSVCRT___timeb64 *buf)
567 return MSVCRT__ftime64( buf );
570 void CDECL MSVCRT__ftime(struct MSVCRT___timeb32 *buf)
572 return MSVCRT__ftime32( buf );
576 /*********************************************************************
579 MSVCRT___time64_t CDECL MSVCRT__time64(MSVCRT___time64_t *buf)
581 MSVCRT___time64_t curtime;
582 struct MSVCRT___timeb64 tb;
584 MSVCRT__ftime64(&tb);
587 return buf ? *buf = curtime : curtime;
590 /*********************************************************************
593 MSVCRT___time32_t CDECL MSVCRT__time32(MSVCRT___time32_t *buf)
595 MSVCRT___time32_t curtime;
596 struct MSVCRT___timeb64 tb;
598 MSVCRT__ftime64(&tb);
601 return buf ? *buf = curtime : curtime;
604 /*********************************************************************
608 MSVCRT___time64_t CDECL MSVCRT_time(MSVCRT___time64_t* buf)
610 return MSVCRT__time64( buf );
613 MSVCRT___time32_t CDECL MSVCRT_time(MSVCRT___time32_t* buf)
615 return MSVCRT__time32( buf );
619 /*********************************************************************
620 * _daylight (MSVCRT.@)
622 int MSVCRT___daylight = 0;
624 /*********************************************************************
625 * __p_daylight (MSVCRT.@)
627 int * CDECL MSVCRT___p__daylight(void)
629 return &MSVCRT___daylight;
632 /*********************************************************************
633 * _dstbias (MSVCRT.@)
635 int MSVCRT__dstbias = 0;
637 /*********************************************************************
638 * __p_dstbias (MSVCRT.@)
640 int * CDECL __p__dstbias(void)
642 return &MSVCRT__dstbias;
645 /*********************************************************************
646 * _timezone (MSVCRT.@)
648 MSVCRT_long MSVCRT___timezone = 0;
650 /*********************************************************************
651 * __p_timezone (MSVCRT.@)
653 MSVCRT_long * CDECL MSVCRT___p__timezone(void)
655 return &MSVCRT___timezone;
658 /*********************************************************************
661 * Some apps (notably Mozilla) insist on writing to these, so the buffer
662 * must be large enough. The size is picked based on observation of
665 static char tzname_std[64] = "";
666 static char tzname_dst[64] = "";
667 char *MSVCRT__tzname[2] = { tzname_std, tzname_dst };
669 /*********************************************************************
670 * __p_tzname (MSVCRT.@)
672 char ** CDECL __p__tzname(void)
674 return MSVCRT__tzname;
677 /*********************************************************************
680 void CDECL MSVCRT__tzset(void)
683 #if defined(HAVE_TIMEZONE) && defined(HAVE_DAYLIGHT)
684 MSVCRT___daylight = daylight;
685 MSVCRT___timezone = timezone;
688 static const time_t seconds_in_year = (365 * 24 + 6) * 3600;
691 int zone_january, zone_july;
694 t = (time(NULL) / seconds_in_year) * seconds_in_year;
696 zone_january = -tmp->tm_gmtoff;
697 t += seconds_in_year / 2;
699 zone_july = -tmp->tm_gmtoff;
700 _munlock(_TIME_LOCK);
702 MSVCRT___daylight = (zone_january != zone_july);
703 MSVCRT___timezone = max(zone_january, zone_july);
706 lstrcpynA(tzname_std, tzname[0], sizeof(tzname_std));
707 tzname_std[sizeof(tzname_std) - 1] = '\0';
708 lstrcpynA(tzname_dst, tzname[1], sizeof(tzname_dst));
709 tzname_dst[sizeof(tzname_dst) - 1] = '\0';
712 /*********************************************************************
713 * strftime (MSVCRT.@)
715 MSVCRT_size_t CDECL MSVCRT_strftime( char *str, MSVCRT_size_t max, const char *format,
716 const struct MSVCRT_tm *mstm )
720 msvcrt_tm_to_unix( &tm, mstm );
721 return strftime( str, max, format, &tm );
724 /*********************************************************************
725 * wcsftime (MSVCRT.@)
727 MSVCRT_size_t CDECL MSVCRT_wcsftime( MSVCRT_wchar_t *str, MSVCRT_size_t max,
728 const MSVCRT_wchar_t *format, const struct MSVCRT_tm *mstm )
733 TRACE("%p %ld %s %p\n", str, max, debugstr_w(format), mstm );
735 len = WideCharToMultiByte( CP_UNIXCP, 0, format, -1, NULL, 0, NULL, NULL );
736 if (!(fmt = MSVCRT_malloc( len ))) return 0;
737 WideCharToMultiByte( CP_UNIXCP, 0, format, -1, fmt, len, NULL, NULL );
739 if ((s = MSVCRT_malloc( max*4 )))
742 msvcrt_tm_to_unix( &tm, mstm );
743 if (!strftime( s, max*4, fmt, &tm )) s[0] = 0;
744 len = MultiByteToWideChar( CP_UNIXCP, 0, s, -1, str, max );
754 /*********************************************************************
757 char * CDECL MSVCRT_asctime(const struct MSVCRT_tm *mstm)
759 thread_data_t *data = msvcrt_get_thread_data();
762 msvcrt_tm_to_unix( &tm, mstm );
764 if (!data->asctime_buffer)
765 data->asctime_buffer = MSVCRT_malloc( 30 ); /* ought to be enough */
767 /* FIXME: may want to map from Unix codepage to CP_ACP */
768 #ifdef HAVE_ASCTIME_R
769 asctime_r( &tm, data->asctime_buffer );
771 strcpy( data->asctime_buffer, asctime(&tm) );
773 return data->asctime_buffer;
776 /*********************************************************************
777 * _wasctime (MSVCRT.@)
779 MSVCRT_wchar_t * CDECL MSVCRT__wasctime(const struct MSVCRT_tm *mstm)
781 thread_data_t *data = msvcrt_get_thread_data();
785 msvcrt_tm_to_unix( &tm, mstm );
787 if (!data->wasctime_buffer)
788 data->wasctime_buffer = MSVCRT_malloc( 30*sizeof(MSVCRT_wchar_t) ); /* ought to be enough */
789 #ifdef HAVE_ASCTIME_R
790 asctime_r( &tm, buffer );
792 strcpy( buffer, asctime(&tm) );
794 MultiByteToWideChar( CP_UNIXCP, 0, buffer, -1, data->wasctime_buffer, 30 );
795 return data->wasctime_buffer;
798 /*********************************************************************
799 * _ctime64 (MSVCRT.@)
801 char * CDECL MSVCRT__ctime64(const MSVCRT___time64_t *time)
804 t = MSVCRT__localtime64( time );
806 return MSVCRT_asctime( t );
809 /*********************************************************************
810 * _ctime32 (MSVCRT.@)
812 char * CDECL MSVCRT__ctime32(const MSVCRT___time32_t *time)
815 t = MSVCRT__localtime32( time );
817 return MSVCRT_asctime( t );
820 /*********************************************************************
824 char * CDECL MSVCRT_ctime(const MSVCRT___time64_t *time)
826 return MSVCRT__ctime64( time );
829 char * CDECL MSVCRT_ctime(const MSVCRT___time32_t *time)
831 return MSVCRT__ctime32( time );
835 /*********************************************************************
836 * _wctime64 (MSVCRT.@)
838 MSVCRT_wchar_t * CDECL MSVCRT__wctime64(const MSVCRT___time64_t *time)
840 return MSVCRT__wasctime( MSVCRT__localtime64(time) );
843 /*********************************************************************
844 * _wctime32 (MSVCRT.@)
846 MSVCRT_wchar_t * CDECL MSVCRT__wctime32(const MSVCRT___time32_t *time)
848 return MSVCRT__wasctime( MSVCRT__localtime32(time) );
851 /*********************************************************************
855 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time64_t *time)
857 return MSVCRT__wctime64( time );
860 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time32_t *time)
862 return MSVCRT__wctime32( time );