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/*
* Copyright (c) 2003, 2017, 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 4949609
* @summary Tests that the readUnsignedInt returns the positive value
*/
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.imageio.stream.ImageInputStream;
public class ReadUnsignedIntTest {
public static void main(String[] args) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
dos.writeInt(1);
dos.writeInt(0x7fffffff);
dos.writeInt(0x8fffffff);
dos.writeInt(0xffffffff);
dos.close();
ByteArrayInputStream bais =
new ByteArrayInputStream(baos.toByteArray());
ImageInputStream iis = ImageIO.createImageInputStream(bais);
for (int i=0; i<4; i++) {
long res = iis.readUnsignedInt();
if (res <= 0) {
throw new RuntimeException("Negative number was read: "+
Long.toString(res, 16));
}
}
}
}
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