static long LocaltimeOffset(DateTime p, FuncContext fctx, out RC rc)
{
// Initialize the contents of sLocal to avoid a compiler warning.
tm sLocal = new tm();
DateTime x = p;
ComputeYMD_HMS(x);
if (x.Y < 1971 || x.Y >= 2038)
{
x.Y = 2000;
x.M = 1;
x.D = 1;
x.h = 0;
x.m = 0;
x.s = 0.0;
}
else
{
int s = (int)(x.s + 0.5);
x.s = s;
}
x.tz = 0;
x.ValidJD = false;
ComputeJD(x);
time_t t = (long)(x.JD / 1000 - 210866760000L);
if (OsLocaltime(t, sLocal) != 0)
{
Vdbe.Result_Error(fctx, "local time unavailable", -1);
rc = RC.ERROR;
return 0;
}
DateTime y = new DateTime();
y.Y = sLocal.tm_year; // +1900;
y.M = sLocal.tm_mon; // +1;
y.D = sLocal.tm_mday;
y.h = sLocal.tm_hour;
y.m = sLocal.tm_min;
y.s = sLocal.tm_sec;
y.ValidYMD = true;
y.ValidHMS = true;
y.ValidJD = false;
y.ValidTZ = false;
ComputeJD(y);
rc = RC.OK;
return (int)(y.JD - x.JD);
}