c_julian_leap_p   693 ext/date/date_core.c     return monthtab[c_julian_leap_p(y) ? 1 : 0][m];
c_julian_leap_p  1780 ext/date/date_core.c     return yeartab[c_julian_leap_p(y) ? 1 : 0][m] + d;
c_julian_leap_p  2909 ext/date/date_core.c     return f_boolcast(c_julian_leap_p(ry));