class method
DateTime.jd
(?::Integer jd, ?::Integer hour, ?::Integer minute, ?::Integer second, ?::Integer offset, ?::Integer start) -> ::DateTime
DateTime.jd([jd=0[, hour=0[, minute=0[, second=0[, offset=0[, start=Date::ITALY]]]]]]) → datetime
ext/date/date_core.c
View on GitHub ↗
static VALUE
datetime_s_jd(int argc, VALUE *argv, VALUE klass)
{
VALUE vjd, vh, vmin, vs, vof, vsg, jd, fr, fr2, ret;
int h, min, s, rof;
double sg;
rb_scan_args(argc, argv, "06", &vjd, &vh, &vmin, &vs, &vof, &vsg);
jd = INT2FIX(0);
h = min = s = 0;
fr2 = INT2FIX(0);
rof = 0;
sg = DEFAULT_SG;
switch (argc) {
case 6:
val2sg(vsg, sg);
case 5:
val2off(vof, rof);
case 4:
check_numeric(vs, "second");
num2int_with_frac(s, positive_inf);
case 3:
check_numeric(vmin, "minute");
num2int_with_frac(min, 3);
case 2:
check_numeric(vh, "hour");
num2int_with_frac(h, 2);
case 1:
check_numeric(vjd, "jd");
num2num_with_frac(jd, 1);
}
{
VALUE nth;
int rh, rmin, rs, rjd, rjd2;
if (!c_valid_time_p(h, min, s, &rh, &rmin, &rs))
rb_raise(eDateError, "invalid date");
canon24oc();
decode_jd(jd, &nth, &rjd);
rjd2 = jd_local_to_utc(rjd,
time_to_df(rh, rmin, rs),
rof);
ret = d_complex_new_internal(klass,
nth, rjd2,
0, INT2FIX(0),
rof, sg,
0, 0, 0,
rh, rmin, rs,
HAVE_JD | HAVE_TIME);
}
add_frac();
return ret;
}
Creates a DateTime object denoting the given chronological Julian day number.
Example
DateTime.jd(2451944) #=> #<DateTime: 2001-02-03T00:00:00+00:00 ...> DateTime.jd(2451945) #=> #<DateTime: 2001-02-04T00:00:00+00:00 ...> DateTime.jd(Rational('0.5')) #=> #<DateTime: -4712-01-01T12:00:00+00:00 ...>