Function oadd

zic.c:4067–4080

Return T1 + T2, but diagnose any overflow and exit. */

  exit(EXIT_FAILURE);
}

/* Return T1 + T2, but diagnose any overflow and exit.  */
ATTRIBUTE_PURE_114833_HACK
static zic_t
oadd(zic_t t1, zic_t t2)
{
#ifdef ckd_add
  zic_t sum;
  if (!ckd_add(&sum, t1, t2))
    return sum;
#else
  if (t1 < 0 ? ZIC_MIN - t1 <= t2 : t2 <= ZIC_MAX - t1)
    return t1 + t2;
#endif
  time_overflow();
}