9e7ba92bff
8021203: BigInteger.doubleValue/floatValue returns 0.0 instead of Infinity 8021204: Constructor BigInteger(String val, int radix) doesn't detect overflow 8022780: Incorrect BigInteger division because of MutableBigInteger.bitLength() overflow Prevent construction of overflowed BigIntegers. Reviewed-by: bpb, darcy, psandoz
52 lines
2.0 KiB
Java
52 lines
2.0 KiB
Java
/*
|
|
* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
/*
|
|
* @ test
|
|
* @bug 8022780
|
|
* @summary Test division of large values
|
|
* @author Dmitry Nadezhin
|
|
*/
|
|
import java.math.BigInteger;
|
|
|
|
public class DivisionOverflow {
|
|
|
|
public static void main(String[] args) {
|
|
try {
|
|
BigInteger a = BigInteger.ONE.shiftLeft(2147483646);
|
|
BigInteger b = BigInteger.ONE.shiftLeft(1568);
|
|
BigInteger[] qr = a.divideAndRemainder(b);
|
|
BigInteger q = qr[0];
|
|
BigInteger r = qr[1];
|
|
if (!r.equals(BigInteger.ZERO))
|
|
throw new RuntimeException("Incorrect singum() of remainder " + r.signum());
|
|
if (q.bitLength() != 2147482079)
|
|
throw new RuntimeException("Incorrect bitLength() of quotient " + q.bitLength());
|
|
System.out.println("Division of large values passed without overflow.");
|
|
} catch (OutOfMemoryError e) {
|
|
// possible
|
|
System.out.println("OutOfMemoryError");
|
|
}
|
|
}
|
|
}
|