Method safeAdd

base/src/main/java/net/time4j/base/MathUtils.java:87–110

(
        int op1,
        int op2
    )

     * @throws  ArithmeticException if int-range overflows
     */
    public static int safeAdd(
        int op1,
        int op2
    ) {

        if (op2 == 0) {
            return op1;
        }

        long result = ((long) op1) + ((long) op2);

        if ((result < Integer.MIN_VALUE) || (result > Integer.MAX_VALUE)) {
            StringBuilder sb = new StringBuilder(32);
            sb.append("Integer overflow: (");
            sb.append(op1);
            sb.append(',');
            sb.append(op2);
            sb.append(')');
            throw new ArithmeticException(sb.toString());
        } else {
            return (int) result;
        }

    }

    /**
     * <p>Sums up the numbers with range check. </p>