267 lines
6.5 KiB
C
267 lines
6.5 KiB
C
/*
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* msvcrt.dll date/time functions
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*
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* Copyright 1996,1998 Marcus Meissner
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* Copyright 1996 Jukka Iivonen
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* Copyright 1997,2000 Uwe Bonnes
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* Copyright 2000 Jon Griffiths
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* Copyright 2004 Hans Leidekker
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <time.h>
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#ifdef HAVE_SYS_TIMES_H
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# include <sys/times.h>
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#endif
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#include "msvcrt.h"
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#include "winbase.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
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static const int MonthLengths[2][12] =
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{
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{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
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{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
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};
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static inline int IsLeapYear(int Year)
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{
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return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0);
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}
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#define SECSPERDAY 86400
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/* 1601 to 1970 is 369 years plus 89 leap days */
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#define SECS_1601_TO_1970 ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
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#define TICKSPERSEC 10000000
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#define TICKSPERMSEC 10000
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#define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
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/* native uses a single static buffer for localtime/gmtime/mktime */
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static struct MSVCRT_tm tm;
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/**********************************************************************
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* mktime (MSVCRT.@)
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*/
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MSVCRT_time_t MSVCRT_mktime(struct MSVCRT_tm *t)
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{
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MSVCRT_time_t secs;
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SYSTEMTIME st;
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FILETIME lft, uft;
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ULONGLONG time;
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st.wMilliseconds = 0;
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st.wSecond = t->tm_sec;
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st.wMinute = t->tm_min;
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st.wHour = t->tm_hour;
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st.wDay = t->tm_mday;
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st.wMonth = t->tm_mon + 1;
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st.wYear = t->tm_year + 1900;
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SystemTimeToFileTime(&st, &lft);
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LocalFileTimeToFileTime(&lft, &uft);
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time = ((ULONGLONG)uft.dwHighDateTime << 32) | uft.dwLowDateTime;
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secs = time / TICKSPERSEC - SECS_1601_TO_1970;
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/* compute tm_wday, tm_yday and renormalize the other fields of the
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* tm structure */
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if( MSVCRT_localtime( &secs)) *t = tm;
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return secs;
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}
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/*********************************************************************
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* localtime (MSVCRT.@)
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*/
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struct MSVCRT_tm* MSVCRT_localtime(const MSVCRT_time_t* secs)
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{
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int i;
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FILETIME ft, lft;
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SYSTEMTIME st;
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DWORD tzid;
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TIME_ZONE_INFORMATION tzinfo;
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ULONGLONG time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
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ft.dwHighDateTime = (UINT)(time >> 32);
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ft.dwLowDateTime = (UINT)time;
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FileTimeToLocalFileTime(&ft, &lft);
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FileTimeToSystemTime(&lft, &st);
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if (st.wYear < 1970) return NULL;
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tm.tm_sec = st.wSecond;
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tm.tm_min = st.wMinute;
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tm.tm_hour = st.wHour;
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tm.tm_mday = st.wDay;
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tm.tm_year = st.wYear - 1900;
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tm.tm_mon = st.wMonth - 1;
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tm.tm_wday = st.wDayOfWeek;
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for (i = tm.tm_yday = 0; i < st.wMonth - 1; i++) {
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tm.tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
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}
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tm.tm_yday += st.wDay - 1;
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tzid = GetTimeZoneInformation(&tzinfo);
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if (tzid == TIME_ZONE_ID_UNKNOWN) {
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tm.tm_isdst = -1;
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} else {
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tm.tm_isdst = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
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}
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return &tm;
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}
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struct MSVCRT_tm* MSVCRT_gmtime(const MSVCRT_time_t* secs)
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{
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int i;
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FILETIME ft;
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SYSTEMTIME st;
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ULONGLONG time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
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ft.dwHighDateTime = (UINT)(time >> 32);
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ft.dwLowDateTime = (UINT)time;
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FileTimeToSystemTime(&ft, &st);
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if (st.wYear < 1970) return NULL;
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tm.tm_sec = st.wSecond;
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tm.tm_min = st.wMinute;
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tm.tm_hour = st.wHour;
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tm.tm_mday = st.wDay;
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tm.tm_year = st.wYear - 1900;
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tm.tm_mon = st.wMonth - 1;
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tm.tm_wday = st.wDayOfWeek;
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for (i = tm.tm_yday = 0; i < st.wMonth - 1; i++) {
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tm.tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
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}
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tm.tm_yday += st.wDay - 1;
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tm.tm_isdst = 0;
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return &tm;
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}
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/**********************************************************************
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* _strdate (MSVCRT.@)
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*/
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char* _strdate(char* date)
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{
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LPCSTR format = "MM'/'dd'/'yy";
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GetDateFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
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return date;
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}
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/*********************************************************************
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* _strtime (MSVCRT.@)
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*/
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char* _strtime(char* date)
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{
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LPCSTR format = "HH':'mm':'ss";
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GetTimeFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
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return date;
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}
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/*********************************************************************
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* clock (MSVCRT.@)
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*/
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MSVCRT_clock_t MSVCRT_clock(void)
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{
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FILETIME ftc, fte, ftk, ftu;
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ULONGLONG utime, ktime;
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MSVCRT_clock_t clock;
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GetProcessTimes(GetCurrentProcess(), &ftc, &fte, &ftk, &ftu);
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ktime = ((ULONGLONG)ftk.dwHighDateTime << 32) | ftk.dwLowDateTime;
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utime = ((ULONGLONG)ftu.dwHighDateTime << 32) | ftu.dwLowDateTime;
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clock = (utime + ktime) / (TICKSPERSEC / MSVCRT_CLOCKS_PER_SEC);
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return clock;
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}
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/*********************************************************************
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* difftime (MSVCRT.@)
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*/
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double MSVCRT_difftime(MSVCRT_time_t time1, MSVCRT_time_t time2)
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{
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return (double)(time1 - time2);
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}
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/*********************************************************************
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* _ftime (MSVCRT.@)
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*/
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void _ftime(struct MSVCRT__timeb *buf)
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{
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TIME_ZONE_INFORMATION tzinfo;
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FILETIME ft;
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ULONGLONG time;
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DWORD tzid = GetTimeZoneInformation(&tzinfo);
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GetSystemTimeAsFileTime(&ft);
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time = ((ULONGLONG)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
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buf->time = time / TICKSPERSEC - SECS_1601_TO_1970;
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buf->millitm = (time % TICKSPERSEC) / TICKSPERMSEC;
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buf->timezone = tzinfo.Bias;
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buf->dstflag = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
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}
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/*********************************************************************
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* time (MSVCRT.@)
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*/
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MSVCRT_time_t MSVCRT_time(MSVCRT_time_t* buf)
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{
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MSVCRT_time_t curtime;
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struct MSVCRT__timeb tb;
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_ftime(&tb);
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curtime = tb.time;
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return buf ? *buf = curtime : curtime;
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}
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/*********************************************************************
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* _daylight (MSVCRT.@)
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*/
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int MSVCRT___daylight = 1; /* FIXME: assume daylight */
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/*********************************************************************
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* __p_daylight (MSVCRT.@)
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*/
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void *MSVCRT___p__daylight(void)
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{
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return &MSVCRT___daylight;
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}
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