4351 }
4352
4353 // Support for resetting final fields while deserializing
4354 private static class UnsafeHolder {
4355 private static final sun.misc.Unsafe unsafe;
4356 private static final long signumOffset;
4357 private static final long magOffset;
4358 static {
4359 try {
4360 unsafe = sun.misc.Unsafe.getUnsafe();
4361 signumOffset = unsafe.objectFieldOffset
4362 (BigInteger.class.getDeclaredField("signum"));
4363 magOffset = unsafe.objectFieldOffset
4364 (BigInteger.class.getDeclaredField("mag"));
4365 } catch (Exception ex) {
4366 throw new ExceptionInInitializerError(ex);
4367 }
4368 }
4369
4370 static void putSign(BigInteger bi, int sign) {
4371 unsafe.putIntVolatile(bi, signumOffset, sign);
4372 }
4373
4374 static void putMag(BigInteger bi, int[] magnitude) {
4375 unsafe.putObjectVolatile(bi, magOffset, magnitude);
4376 }
4377 }
4378
4379 /**
4380 * Save the {@code BigInteger} instance to a stream. The magnitude of a
4381 * {@code BigInteger} is serialized as a byte array for historical reasons.
4382 * To maintain compatibility with older implementations, the integers
4383 * -1, -1, -2, and -2 are written as the values of the obsolete fields
4384 * {@code bitCount}, {@code bitLength}, {@code lowestSetBit}, and
4385 * {@code firstNonzeroByteNum}, respectively. These values are compatible
4386 * with older implementations, but will be ignored by current
4387 * implementations.
4388 */
4389 private void writeObject(ObjectOutputStream s) throws IOException {
4390 // set the values of the Serializable fields
4391 ObjectOutputStream.PutField fields = s.putFields();
4392 fields.put("signum", signum);
4393 fields.put("magnitude", magSerializedForm());
4394 // The values written for cached fields are compatible with older
4395 // versions, but are ignored in readObject so don't otherwise matter.
|
4351 }
4352
4353 // Support for resetting final fields while deserializing
4354 private static class UnsafeHolder {
4355 private static final sun.misc.Unsafe unsafe;
4356 private static final long signumOffset;
4357 private static final long magOffset;
4358 static {
4359 try {
4360 unsafe = sun.misc.Unsafe.getUnsafe();
4361 signumOffset = unsafe.objectFieldOffset
4362 (BigInteger.class.getDeclaredField("signum"));
4363 magOffset = unsafe.objectFieldOffset
4364 (BigInteger.class.getDeclaredField("mag"));
4365 } catch (Exception ex) {
4366 throw new ExceptionInInitializerError(ex);
4367 }
4368 }
4369
4370 static void putSign(BigInteger bi, int sign) {
4371 unsafe.putInt(bi, signumOffset, sign);
4372 }
4373
4374 static void putMag(BigInteger bi, int[] magnitude) {
4375 unsafe.putObject(bi, magOffset, magnitude);
4376 }
4377 }
4378
4379 /**
4380 * Save the {@code BigInteger} instance to a stream. The magnitude of a
4381 * {@code BigInteger} is serialized as a byte array for historical reasons.
4382 * To maintain compatibility with older implementations, the integers
4383 * -1, -1, -2, and -2 are written as the values of the obsolete fields
4384 * {@code bitCount}, {@code bitLength}, {@code lowestSetBit}, and
4385 * {@code firstNonzeroByteNum}, respectively. These values are compatible
4386 * with older implementations, but will be ignored by current
4387 * implementations.
4388 */
4389 private void writeObject(ObjectOutputStream s) throws IOException {
4390 // set the values of the Serializable fields
4391 ObjectOutputStream.PutField fields = s.putFields();
4392 fields.put("signum", signum);
4393 fields.put("magnitude", magSerializedForm());
4394 // The values written for cached fields are compatible with older
4395 // versions, but are ignored in readObject so don't otherwise matter.
|