Function GetTimeNow

general.cpp:2297–2370

// return value filled is expressed in the given zone parameter.

void GetTimeNow(int *mon, int *day, int *yea, real *tim, real dst, real zon)
{
#ifdef PC
  SYSTEMTIME st, lt;
  real jd;
  int dh;

  GetSystemTime(&st);
  if (dst == dstAuto) {
    // Daylight field of 24 means autodetect whether Daylight Saving Time.

    GetLocalTime(&lt);
    dh = NAbs(st.wHour - lt.wHour);
    if (dh > 12)
      dh = 24-dh;
    is.fDst = (dh == ciDefa.zon-1);
    dst = (real)is.fDst;
  }
  if (zon == zonLMT || zon == zonLAT)
    zon = ciDefa.lon / 15.0;
  jd = MdytszToJulian(st.wMonth, st.wDay, st.wYear,
    (real)(((st.wHour * 60 + st.wMinute + us.lTimeAddition) * 60 +
    st.wSecond) * 1000 + st.wMilliseconds) / (60.0 * 60.0 * 1000.0),
    0.0, -(zon-dst));
  *tim = (jd - RFloor(jd)) * 24.0;
  JulianToMdy(jd - 0.5, mon, day, yea);
#else
  time_t curtimer;
  int min, sec, i;
  real hr;
  CI ci;

  time(&curtimer);
  sec = (int)(curtimer % 60);
  curtimer = curtimer / 60 + us.lTimeAddition;
  min = (int)(curtimer % 60);
  curtimer /= 60;
  if (zon == zonLMT || zon == zonLAT)
    zon = ciDefa.lon / 15.0;
  hr = (real)(curtimer % 24) - (zon - (dst == dstAuto ? 0.0 : dst));
  curtimer /= 24;
  while (hr < 0.0) {
    curtimer--;
    hr += 24.0;
  }
  while (hr >= 24.0) {
    curtimer++;
    hr -= 24.0;
  }
  curtimer += ldTime;  // Number of days between 1/1/1970 and 1/1/4713 BC.
  JulianToMdy((real)curtimer, mon, day, yea);
  *tim = HMS(hr, min, sec);
  if (dst == dstAuto) {
    // Daylight field of 24 means autodetect whether Daylight Saving Time.

    SetCI(ci, *mon, *day, *yea, *tim, 0.0, zon, ciDefa.lon, ciDefa.lat);
    if (DisplayAtlasLookup(ciDefa.loc, 0, &i) &&
      DisplayTimezoneChanges(is.rgae[i].izn, 0, &ci)) {