wince不支持C运行时库 time（）

         wince居然不支持C运行时库 time（）函数！找到一个转换代码

#include <string.h>
#include <time.h>

#include <winbase.h>

static struct tm Date;
// the count of days of 12 months
const int SecOfOneDay = 86400 ; // 24*60*60

const short month[2][13]={
           365,31,28,31,30,31,30,31,31,30,31,30,31,
           366,31,29,31,30,31,30,31,31,30,31,30,31
};


int       IsLeapYear(int year)
{
       return (0==year%4       && (0!=year%100 || 0==year%400) );
}

// notify ::::       the result you should see in the time.h of standard c
// eg . 1972/11/28/ 6:30:30
// save as : 72/10/28/ 6:30:30
void       Second2Date(const unsigned long* seconds , struct tm* Date )
{ 
       long totalsec = *(seconds) ;
       int       leapyear;

// judge the year 
       for(int i=0 ; ; i++)
       {
leapyear = IsLeapYear(1970+i);
         totalsec -= (long) (month[leapyear][0] * SecOfOneDay);
if( totalsec < 0 )
{
//        Date->tm_yday = month[leapyear][0]-1;        do not fill this data
        Date->tm_year = 70+i;          // 1970+i-1900 as standard C
        totalsec += (long) (month[leapyear][0] * SecOfOneDay);
        break;
}
       }

// judge the weekday 
       int weekday = 1900+Date->tm_year-1;       // the 1900 , do not forget !!!!!
       weekday = weekday + (int)(weekday/4) - (int)(weekday/100) + (int)(weekday/400) + (int)(totalsec/SecOfOneDay)+1;
       Date->tm_wday = weekday%7;

// judge the month
       for( i=1; i<=12 ; i++ )
       {
        totalsec -= (long) (month[leapyear][i] * SecOfOneDay);
        if(totalsec < 0)
        {
          Date->tm_mon = i-1;           // the define of tm_mon (0--11)
       totalsec += (long) (month[leapyear][i] * SecOfOneDay);
       break;
        }
       }

//       judge the day , hour, min , second
        Date->tm_mday = (int)(totalsec/SecOfOneDay+1) ;

        int oddsec = (int)(totalsec%SecOfOneDay);
        Date->tm_hour = (int)(oddsec/3600);

        oddsec = (int)(oddsec%3600);
        Date->tm_min       = (int)(oddsec/60);

        oddsec = (int)(oddsec%60);
        Date->tm_sec = oddsec;

        return;
}

unsigned long       Date2Second(struct tm* Date)
{
        long totalseconds = 0 ;
        int leapyear;
        int index ;

// now index stands for the year
        for(index=1970; index< (Date->tm_year+1900); index++)
        {
          leapyear = IsLeapYear(index);
       totalseconds += (long)(month[leapyear][0] * SecOfOneDay);
        }

        leapyear = IsLeapYear(index);
// now index stands for the month
        for(index=1 ; index<(Date->tm_mon+1) ; index++)
        {
          totalseconds += (long)(month[leapyear][index]*SecOfOneDay);
        }

// day
        totalseconds += (long)((Date->tm_mday-1)*SecOfOneDay);
// hour , minute ,second
        totalseconds += (long)(Date->tm_hour)*3600;
        totalseconds += (long)(Date->tm_min)*60;
        totalseconds += (long)Date->tm_sec;

        return totalseconds;


}

struct tm* gmtime(const time_t* seconds)
{ 
#ifdef _WIN32_WCE
       memset(&Date,0,sizeof(Date));
       Second2Date( seconds , &Date );
       return &Date;
#else
       return gmtime(seconds);
#endif
}

time_t       mktime(struct tm* Date)
{
#ifdef _WIN32_WCE
       return Date2Second(Date);
#else  
       return mktime(Date);
#endif
}

time_t time(time_t *timer)
{
SYSTEMTIME systime;
struct tm st;
GetSystemTime(&systime);

st.tm_sec       = systime.wSecond; // second
st.tm_min       = systime.wMinute; // minute
st.tm_hour = systime.wHour;       // hour
st.tm_mday = systime.wDay;       // Specifies the current day of the month
st.tm_mon       = systime.wMonth - 1; //
st.tm_year = systime.wYear - 1900; //

return timer? (*timer = mktime(&st)) : mktime(&st);
}

由于开发的DLL是win32平台，MFC那套不能用了，这个很好，将来做LINUX的so也可以参照