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/*
* Copyright (c) 2001, 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 4422263
* @summary Checks that ImageInputStream.readFully(type[], int int) handles sign
* extension and byte ordering correctly
*/
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.nio.ByteOrder;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.MemoryCacheImageInputStream;
public class ReadFullyTest {
private static void assertEquals(long actual, long expected) {
if (actual != expected) {
throw new AssertionError("Expected 0x" + Long.toHexString(expected) + ", got 0x" + Long.toHexString(actual));
}
}
public static void main (String args[]) {
try {
byte[] b = {
(byte)0x11, (byte)0x22, // low low
(byte)0x44, (byte)0x99, // low high
(byte)0xAA, (byte)0x33, // high low
(byte)0xBB, (byte)0xCC // high high
};
InputStream in = new ByteArrayInputStream(b);
ImageInputStream iin = new MemoryCacheImageInputStream(in);
short[] s = new short[b.length/2];
char[] c = new char[b.length/2];
int[] i = new int[b.length/4];
long[] l = new long[b.length/8];
float[] f = new float[b.length/4];
double[] d = new double[b.length/8];
iin.seek(0L);
iin.setByteOrder(ByteOrder.BIG_ENDIAN);
iin.readFully(s, 0, s.length);
assertEquals(s[0] & 0xffff, 0x1122);
assertEquals(s[1] & 0xffff, 0x4499);
assertEquals(s[2] & 0xffff, 0xAA33);
assertEquals(s[3] & 0xffff, 0xBBCC);
iin.seek(0L);
iin.setByteOrder(ByteOrder.LITTLE_ENDIAN);
iin.readFully(s, 0, s.length);
assertEquals(s[0] & 0xffff, 0x2211);
assertEquals(s[1] & 0xffff, 0x9944);
assertEquals(s[2] & 0xffff, 0x33AA);
assertEquals(s[3] & 0xffff, 0xCCBB);
iin.seek(0L);
iin.setByteOrder(ByteOrder.BIG_ENDIAN);
iin.readFully(c, 0, c.length);
assertEquals(c[0], 0x1122);
assertEquals(c[1], 0x4499);
assertEquals(c[2], 0xAA33);
assertEquals(c[3], 0xBBCC);
iin.seek(0L);
iin.setByteOrder(ByteOrder.LITTLE_ENDIAN);
iin.readFully(c, 0, c.length);
assertEquals(c[0], 0x2211);
assertEquals(c[1], 0x9944);
assertEquals(c[2], 0x33AA);
assertEquals(c[3], 0xCCBB);
iin.seek(0L);
iin.setByteOrder(ByteOrder.BIG_ENDIAN);
iin.readFully(i, 0, i.length);
assertEquals(i[0] & 0xffffffff, 0x11224499);
assertEquals(i[1] & 0xffffffff, 0xAA33BBCC);
iin.seek(0L);
iin.setByteOrder(ByteOrder.LITTLE_ENDIAN);
iin.readFully(i, 0, i.length);
assertEquals(i[0] & 0xffffffff, 0x99442211);
assertEquals(i[1] & 0xffffffff, 0xCCBB33AA);
iin.seek(0L);
iin.setByteOrder(ByteOrder.BIG_ENDIAN);
iin.readFully(f, 0, f.length);
assertEquals(Float.floatToIntBits(f[0]) & 0xffffffff, 0x11224499);
assertEquals(Float.floatToIntBits(f[1]) & 0xffffffff, 0xAA33BBCC);
iin.seek(0L);
iin.setByteOrder(ByteOrder.LITTLE_ENDIAN);
iin.readFully(f, 0, f.length);
assertEquals(Float.floatToIntBits(f[0]) & 0xffffffff, 0x99442211);
assertEquals(Float.floatToIntBits(f[1]) & 0xffffffff, 0xCCBB33AA);
iin.seek(0L);
iin.setByteOrder(ByteOrder.BIG_ENDIAN);
iin.readFully(l, 0, l.length);
assertEquals(l[0], 0x11224499AA33BBCCL);
iin.seek(0L);
iin.setByteOrder(ByteOrder.LITTLE_ENDIAN);
iin.readFully(l, 0, l.length);
assertEquals(l[0], 0xCCBB33AA99442211L);
iin.seek(0L);
iin.setByteOrder(ByteOrder.BIG_ENDIAN);
iin.readFully(d, 0, d.length);
assertEquals(Double.doubleToLongBits(d[0]), 0x11224499AA33BBCCL);
iin.seek(0L);
iin.setByteOrder(ByteOrder.LITTLE_ENDIAN);
iin.readFully(d, 0, d.length);
assertEquals(Double.doubleToLongBits(d[0]), 0xCCBB33AA99442211L);
} catch (Throwable ex) {
throw new RuntimeException("Got exception", ex);
}
}
}
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