1 /* 2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 4949609 27 * @summary Tests that the readUnsignedInt returns the positive value 28 */ 29 30 import java.io.ByteArrayInputStream; 31 import java.io.ByteArrayOutputStream; 32 import java.io.DataOutputStream; 33 import java.io.IOException; 34 35 import javax.imageio.ImageIO; 36 import javax.imageio.stream.ImageInputStream; 37 38 public class ReadUnsignedIntTest { 39 40 public static void main(String[] args) throws IOException { 41 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 42 DataOutputStream dos = new DataOutputStream(baos); 43 44 dos.writeInt(1); 45 dos.writeInt(0x7fffffff); 46 dos.writeInt(0x8fffffff); 47 dos.writeInt(0xffffffff); 48 49 dos.close(); 50 51 ByteArrayInputStream bais = 52 new ByteArrayInputStream(baos.toByteArray()); 53 ImageInputStream iis = ImageIO.createImageInputStream(bais); 54 for (int i=0; i<4; i++) { 55 long res = iis.readUnsignedInt(); 56 if (res <= 0) { 57 throw new RuntimeException("Negative number was read: "+ 58 Long.toString(res, 16)); 59 } 60 } 61 } 62 }