GetTimeOfDay on Windows

[Steven Edwards]

Hello,
What do you think about me adding a case for GetTimeOfDay to libwine for the Windows port? I dont
expect every case of it to be reimplemented from scratch and it seems that winsock2.h defines 
typedef struct timeval {
  long tv_sec;
  long tv_usec;
} timeval;

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/timeval_2.asp

/*
 * Defines gettimeofday
 *
 * Based on timeval.h by Wu Yongwei
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"
#include "wine/port.h"

#ifndef HAVE_GETTIMEOFDAY
__inline int gettimeofday(struct timeval *tv, struct timezone *tz)
#ifdef _WINDOWS
{
    FILETIME        ft;
    LARGE_INTEGER   li;
    __int64         t;
    static int      tzflag;

    if (tv)
    {
        GetSystemTimeAsFileTime(&ft);
        li.LowPart  = ft.dwLowDateTime;
        li.HighPart = ft.dwHighDateTime;
        t  = li.QuadPart;       /* In 100-nanosecond intervals */
        t -= EPOCHFILETIME;     /* Offset to the Epoch time */
        t /= 10;                /* In microseconds */
        tv->tv_sec  = (long)(t / 1000000);
        tv->tv_usec = (long)(t % 1000000);
    }

    if (tz)
    {
        if (!tzflag)
        {
            _tzset();
            tzflag++;
        }
        tz->tz_minuteswest = _timezone / 60;
        tz->tz_dsttime = _daylight;
    }

    return 0;

#else /* !defined(_WINDOWS) */
    errno = ENOSYS;
    return -1;
#endif /* _WINDOWS */
#endif /* HAVE_GETTIMEOFDAY */
}


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