--- /dev/null 2017-05-22 14:23:58.000000000 -0700 +++ new/test/javax/imageio/stream/ReadUnsignedIntTest.java 2017-05-22 14:23:57.000000000 -0700 @@ -0,0 +1,62 @@ +/* + * 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)); + } + } + } +}