Function tadd

zic.c:4085–4093

Return T1 + T2, but diagnose any overflow and exit. This is like oadd, except the result must fit in min_time..max_time range, which on oddball machines can be a smaller range than ZIC_MIN..ZIC_MAX. */

/* Return T1 + T2, but diagnose any overflow and exit.
   This is like oadd, except the result must fit in min_time..max_time range,
   which on oddball machines can be a smaller range than ZIC_MIN..ZIC_MAX.  */
ATTRIBUTE_PURE_114833_HACK
static zic_t
tadd(zic_t t1, zic_t t2)
{
  zic_t sum = oadd(t1, t2);
  if (min_time <= sum && sum <= max_time)
    return sum;
  time_overflow();
}