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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #ifdef HAVE_SYS_TIMES_H
29 # include <sys/times.h>
33 #include "msvcrt/sys/timeb.h"
34 #include "msvcrt/time.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 #define SECSPERDAY 86400
54 /* 1601 to 1970 is 369 years plus 89 leap days */
55 #define SECS_1601_TO_1970 ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
56 #define TICKSPERSEC 10000000
57 #define TICKSPERMSEC 10000
58 #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
60 /* native uses a single static buffer for localtime/gmtime/mktime */
61 static struct MSVCRT_tm tm
;
63 /**********************************************************************
66 MSVCRT_time_t
MSVCRT_mktime(struct MSVCRT_tm
*t
)
74 st
.wSecond
= t
->tm_sec
;
75 st
.wMinute
= t
->tm_min
;
76 st
.wHour
= t
->tm_hour
;
77 st
.wDay
= t
->tm_mday
- 1;
78 st
.wMonth
= t
->tm_mon
;
79 st
.wYear
= t
->tm_year
+ 1900;
81 SystemTimeToFileTime(&st
, &lft
);
82 LocalFileTimeToFileTime(&lft
, &uft
);
84 time
= ((ULONGLONG
)uft
.dwHighDateTime
<< 32) | uft
.dwLowDateTime
;
85 secs
= time
/ TICKSPERSEC
- SECS_1601_TO_1970
;
90 /*********************************************************************
91 * localtime (MSVCRT.@)
93 struct MSVCRT_tm
* MSVCRT_localtime(const MSVCRT_time_t
* secs
)
100 TIME_ZONE_INFORMATION tzinfo
;
102 ULONGLONG time
= *secs
* (ULONGLONG
)TICKSPERSEC
+ TICKS_1601_TO_1970
;
104 ft
.dwHighDateTime
= (UINT
)(time
>> 32);
105 ft
.dwLowDateTime
= (UINT
)time
;
107 FileTimeToLocalFileTime(&ft
, &lft
);
108 FileTimeToSystemTime(&lft
, &st
);
110 if (st
.wYear
< 1970) return NULL
;
112 tm
.tm_sec
= st
.wSecond
;
113 tm
.tm_min
= st
.wMinute
;
114 tm
.tm_hour
= st
.wHour
;
115 tm
.tm_mday
= st
.wDay
;
116 tm
.tm_year
= st
.wYear
- 1900;
117 tm
.tm_mon
= st
.wMonth
+ 1;
118 tm
.tm_wday
= st
.wDayOfWeek
;
120 for (i
= 0; i
< st
.wMonth
; i
++) {
121 tm
.tm_yday
+= MonthLengths
[IsLeapYear(st
.wYear
)][i
];
124 tm
.tm_yday
+= st
.wDay
;
126 tzid
= GetTimeZoneInformation(&tzinfo
);
128 if (tzid
== TIME_ZONE_ID_UNKNOWN
) {
131 tm
.tm_isdst
= (tzid
== TIME_ZONE_ID_DAYLIGHT
?1:0);
137 struct MSVCRT_tm
* MSVCRT_gmtime(const MSVCRT_time_t
* secs
)
144 ULONGLONG time
= *secs
* (ULONGLONG
)TICKSPERSEC
+ TICKS_1601_TO_1970
;
146 ft
.dwHighDateTime
= (UINT
)(time
>> 32);
147 ft
.dwLowDateTime
= (UINT
)time
;
149 FileTimeToSystemTime(&lft
, &st
);
151 if (st
.wYear
< 1970) return NULL
;
153 tm
.tm_sec
= st
.wSecond
;
154 tm
.tm_min
= st
.wMinute
;
155 tm
.tm_hour
= st
.wHour
;
156 tm
.tm_mday
= st
.wDay
;
157 tm
.tm_year
= st
.wYear
- 1900;
158 tm
.tm_mon
= st
.wMonth
+ 1;
159 tm
.tm_wday
= st
.wDayOfWeek
;
161 for (i
= 0; i
< st
.wMonth
; i
++) {
162 tm
.tm_yday
+= MonthLengths
[IsLeapYear(st
.wYear
)][i
];
165 tm
.tm_yday
+= st
.wDay
;
171 /**********************************************************************
172 * _strdate (MSVCRT.@)
174 char* _strdate(char* date
)
176 LPCSTR format
= "MM'/'dd'/'yy";
178 GetDateFormatA(LOCALE_NEUTRAL
, 0, NULL
, format
, date
, 9);
183 /*********************************************************************
184 * _strtime (MSVCRT.@)
186 char* _strtime(char* date
)
188 LPCSTR format
= "HH':'mm':'ss";
190 GetTimeFormatA(LOCALE_NEUTRAL
, 0, NULL
, format
, date
, 9);
195 /*********************************************************************
198 MSVCRT_clock_t
MSVCRT_clock(void)
200 FILETIME ftc
, fte
, ftk
, ftu
;
201 ULONGLONG utime
, ktime
;
203 MSVCRT_clock_t clock
;
205 GetProcessTimes(GetCurrentProcess(), &ftc
, &fte
, &ftk
, &ftu
);
207 ktime
= ((ULONGLONG
)ftk
.dwHighDateTime
<< 32) | ftk
.dwLowDateTime
;
208 utime
= ((ULONGLONG
)ftu
.dwHighDateTime
<< 32) | ftu
.dwLowDateTime
;
210 clock
= ((utime
+ ktime
) / TICKSPERSEC
) * CLOCKS_PER_SEC
;
215 /*********************************************************************
216 * difftime (MSVCRT.@)
218 double MSVCRT_difftime(MSVCRT_time_t time1
, MSVCRT_time_t time2
)
220 return (double)(time1
- time2
);
223 /*********************************************************************
226 MSVCRT_time_t
MSVCRT_time(MSVCRT_time_t
* buf
)
228 MSVCRT_time_t curtime
;
234 return buf
? *buf
= curtime
: curtime
;
237 /*********************************************************************
240 void _ftime(struct _timeb
*buf
)
242 TIME_ZONE_INFORMATION tzinfo
;
246 DWORD tzid
= GetTimeZoneInformation(&tzinfo
);
247 GetSystemTimeAsFileTime(&ft
);
249 time
= ((ULONGLONG
)ft
.dwHighDateTime
<< 32) | ft
.dwLowDateTime
;
251 buf
->time
= time
/ TICKSPERSEC
- SECS_1601_TO_1970
;
252 buf
->millitm
= (time
% TICKSPERSEC
) / TICKSPERMSEC
;
253 buf
->timezone
= tzinfo
.Bias
;
254 buf
->dstflag
= (tzid
== TIME_ZONE_ID_DAYLIGHT
?1:0);
257 /*********************************************************************
258 * _daylight (MSVCRT.@)
260 int MSVCRT___daylight
= 1; /* FIXME: assume daylight */
262 /*********************************************************************
263 * __p_daylight (MSVCRT.@)
265 void *MSVCRT___p__daylight(void)
267 return &MSVCRT___daylight
;