63 lines
2.1 KiB
Java
63 lines
2.1 KiB
Java
/*
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* Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4949609
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* @summary Tests that the readUnsignedInt returns the positive value
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*/
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import javax.imageio.ImageIO;
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import javax.imageio.stream.ImageInputStream;
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public class ReadUnsignedIntTest {
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public static void main(String[] args) throws IOException {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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DataOutputStream dos = new DataOutputStream(baos);
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dos.writeInt(1);
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dos.writeInt(0x7fffffff);
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dos.writeInt(0x8fffffff);
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dos.writeInt(0xffffffff);
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dos.close();
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ByteArrayInputStream bais =
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new ByteArrayInputStream(baos.toByteArray());
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ImageInputStream iis = ImageIO.createImageInputStream(bais);
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for (int i=0; i<4; i++) {
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long res = iis.readUnsignedInt();
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if (res <= 0) {
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throw new RuntimeException("Negative number was read: "+
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Long.toString(res, 16));
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}
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}
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}
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}
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