64位时间互转

//64位时间转化

1315290545000000000 ->2011-09-06 14:29:05
void ConvertNano2Time()
{
    char Time[128]={0},t[32]={0};
    struct tm* pTm;
    CString strNano;
    UINT64 unix_val;

    GetDlgItem(IDC_EDIT_NANO)->GetWindowText(strNano);
    strcpy(t,strNano.GetBuffer(0));
    sscanf(t,"%lld",&unix_val);
    unix_val = unix_val/10;
    const __time64_t tv_sec  =  unix_val / 100000000;
    UINT64            tv_nano  = (unix_val % 100000000) * 10;
    pTm = _localtime64(&tv_sec);
    if (pTm == NULL)
    {
        return;
    }
    else
    {
        sprintf(Time,"%4d-%02d-%02d %02d:%02d:%02d\n",pTm->tm_year+1900,pTm->tm_mon+1,pTm->tm_mday,pTm->tm_hour,pTm->tm_min,pTm->tm_sec);
    }
    GetDlgItem(IDC_EDIT_TIME)->SetWindowText(Time);
    return;
}
//2011-09-06 14:29:05->1315290545000000000

void ConvertTime2Nano()
{
    char time[64]={0};
    int year,mon,day,hour,min,second;
    struct tm Tm;
    CString strTime;
    GetDlgItem(IDC_EDIT_TIME)->GetWindowText(strTime);

    sscanf(strTime.GetBuffer(0),"%4d-%02d-%02d %02d:%02d:%02d",&Tm.tm_year,&Tm.tm_mon,&Tm.tm_mday,&Tm.tm_hour,&Tm.tm_min,&Tm.tm_sec);
    Tm.tm_year-=1900;
    Tm.tm_mon-=1;
    __time64_t timeSecond = _mktime64(&Tm);
    timeSecond*=1000000000;
    CString strSecond;
    strSecond.Format("%lld",timeSecond);
    GetDlgItem(IDC_EDIT_NANO)->SetWindowText(strSecond);

}