method

jd

v1_9_3_125 - Show latest stable - Class: DateTime

jd(p1 = v1, p2 = v2, p3 = v3, p4 = v4, p5 = v5, p6 = v6)

public

Creates a datetime object denoting the given chronological Julian day number.

For 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 ...>

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:
        num2int_with_frac(s, positive_inf);
      case 3:
        num2int_with_frac(min, 3);
      case 2:
        num2int_with_frac(h, 2);
      case 1:
        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(rb_eArgError, "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;
}

jd

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