Method round

basex-core/src/main/java/org/basex/query/func/fn/FnRound.java:46–53

Rounds values. @param qc query context @param mode rounding mode @return number or Empty#VALUE @throws QueryException query exception

(final QueryContext qc, final RoundMode mode)

   * @throws QueryException query exception
   */
  final Item round(final QueryContext qc, final RoundMode mode) throws QueryException {
    final ANum value = toNumberOrNull(arg(0), qc);
    final Item precision = arg(1).atomItem(qc, info);

    final int scale = precision.isEmpty() ? 0 : (int) Math.max(-1 << 20,
        Math.min(1 << 20, toLong(precision)));
    return value == null ? Empty.VALUE : value.round(scale, mode);
  }
}