systime.c

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/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS system libraries
 * FILE:        lib/crt/??????
 * PURPOSE:     Unknown
 * PROGRAMER:   Unknown
 * UPDATE HISTORY:
 *              25/11/05: Added license header
 */

#include <precomp.h>

int month[12] = { 31,28,31,30,31,30,31,31,30,31,30,31};

/*
 * @unimplemented
 */
unsigned int _getsystime(struct tm* tp)
{
    SYSTEMTIME Time;
    int i;
    DWORD TimeZoneId;
    TIME_ZONE_INFORMATION TimeZoneInformation;

    GetLocalTime(&Time);

    tp->tm_year = Time.wYear - 1900;
    tp->tm_mon = Time.wMonth - 1;
    tp->tm_wday = Time.wDayOfWeek;
    tp->tm_mday = Time.wDay;
    tp->tm_hour = Time.wHour;
    tp->tm_min = Time.wMinute;
    tp->tm_sec = Time.wSecond;

    tp->tm_isdst = -1;

    TimeZoneId =  GetTimeZoneInformation(&TimeZoneInformation);
    if (TimeZoneId == TIME_ZONE_ID_DAYLIGHT){
      tp->tm_isdst = 1;
    }
    else
      tp->tm_isdst = 0;

    if (tp->tm_year % 4 == 0) {
        if (tp->tm_year % 100 != 0)
            tp->tm_yday = 1;
        else if ((tp->tm_year-100) % 1000 == 0)
            tp->tm_yday = 1;
    }

    for (i = 0; i <= tp->tm_mon; i++)
        tp->tm_yday += month[i];

    return Time.wMilliseconds;
}


/*
 * @implemented
 */
unsigned int _setsystime(struct tm* tp, unsigned int ms)
{
    SYSTEMTIME Time;

    Time.wYear = tp->tm_year + 1900;
    Time.wMonth = tp->tm_mon + 1;
    Time.wDayOfWeek = tp->tm_wday;
    Time.wDay = tp->tm_mday;
    Time.wHour = tp->tm_hour;
    Time.wMinute = tp->tm_min;
    Time.wSecond = tp->tm_sec;
    Time.wMilliseconds = ms;

    if (!SetLocalTime(&Time))
        return -1;

    return 0;
}