1/*
2 * Copyright (c) 2001, 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 4422263
27 * @summary Checks that ImageInputStream.readFully(type[], int int) handles sign
28 *          extension and byte ordering correctly
29 */
30
31import java.io.ByteArrayInputStream;
32import java.io.InputStream;
33import java.nio.ByteOrder;
34
35import javax.imageio.stream.ImageInputStream;
36import javax.imageio.stream.MemoryCacheImageInputStream;
37
38public class ReadFullyTest {
39
40    static final ByteOrder bigEndian = ByteOrder.BIG_ENDIAN;
41    static final ByteOrder littleEndian = ByteOrder.LITTLE_ENDIAN;
42
43    private static void expect(long e, long g) {
44        if (e != g) {
45            throw new RuntimeException("Expected " + e + ", got " + g);
46        }
47    }
48
49    public static void main (String args[]) {
50        try {
51            byte[] b = {
52                (byte)0x11, (byte)0x22, // low low
53                (byte)0x44, (byte)0x99, // low high
54                (byte)0xAA, (byte)0x33, // high low
55                (byte)0xBB, (byte)0xCC  // high high
56            };
57            InputStream in = new ByteArrayInputStream(b);
58            ImageInputStream iin = new MemoryCacheImageInputStream(in);
59
60            short[] s = new short[b.length/2];
61            char[] c = new char[b.length/2];
62            int[] i = new int[b.length/4];
63            long[] l = new long[b.length/8];
64            float[] f = new float[b.length/4];
65            double[] d = new double[b.length/8];
66
67            iin.seek(0L);
68            iin.setByteOrder(bigEndian);
69            iin.readFully(s, 0, s.length);
70            expect(s[0] & 0xffff, 0x1122);
71            expect(s[1] & 0xffff, 0x4499);
72            expect(s[2] & 0xffff, 0xAA33);
73            expect(s[3] & 0xffff, 0xBBCC);
74
75            iin.seek(0L);
76            iin.setByteOrder(littleEndian);
77            iin.readFully(s, 0, s.length);
78            expect(s[0] & 0xffff, 0x2211);
79            expect(s[1] & 0xffff, 0x9944);
80            expect(s[2] & 0xffff, 0x33AA);
81            expect(s[3] & 0xffff, 0xCCBB);
82
83            iin.seek(0L);
84            iin.setByteOrder(bigEndian);
85            iin.readFully(c, 0, c.length);
86            expect(c[0], 0x1122);
87            expect(c[1], 0x4499);
88            expect(c[2], 0xAA33);
89            expect(c[3], 0xBBCC);
90
91            iin.seek(0L);
92            iin.setByteOrder(littleEndian);
93            iin.readFully(c, 0, c.length);
94            expect(c[0], 0x2211);
95            expect(c[1], 0x9944);
96            expect(c[2], 0x33AA);
97            expect(c[3], 0xCCBB);
98
99            iin.seek(0L);
100            iin.setByteOrder(bigEndian);
101            iin.readFully(i, 0, i.length);
102            expect(i[0] & 0xffffffff, 0x11224499);
103            expect(i[1] & 0xffffffff, 0xAA33BBCC);
104
105            iin.seek(0L);
106            iin.setByteOrder(littleEndian);
107            iin.readFully(i, 0, i.length);
108            expect(i[0] & 0xffffffff, 0x99442211);
109            expect(i[1] & 0xffffffff, 0xCCBB33AA);
110
111            iin.seek(0L);
112            iin.setByteOrder(bigEndian);
113            iin.readFully(f, 0, f.length);
114            expect(Float.floatToIntBits(f[0]) & 0xffffffff, 0x11224499);
115            expect(Float.floatToIntBits(f[1]) & 0xffffffff, 0xAA33BBCC);
116
117            iin.seek(0L);
118            iin.setByteOrder(littleEndian);
119            iin.readFully(f, 0, f.length);
120            expect(Float.floatToIntBits(f[0]) & 0xffffffff, 0x99442211);
121            expect(Float.floatToIntBits(f[1]) & 0xffffffff, 0xCCBB33AA);
122
123            iin.seek(0L);
124            iin.setByteOrder(bigEndian);
125            iin.readFully(l, 0, l.length);
126            expect(l[0], 0x11224499AA33BBCCL);
127
128            iin.seek(0L);
129            iin.setByteOrder(littleEndian);
130            iin.readFully(l, 0, l.length);
131            expect(l[0], 0xCCBB33AA99442211L);
132
133            iin.seek(0L);
134            iin.setByteOrder(bigEndian);
135            iin.readFully(d, 0, d.length);
136            expect(Double.doubleToLongBits(d[0]), 0x11224499AA33BBCCL);
137
138            iin.seek(0L);
139            iin.setByteOrder(littleEndian);
140            iin.readFully(d, 0, d.length);
141            expect(Double.doubleToLongBits(d[0]), 0xCCBB33AA99442211L);
142        } catch (Exception ex) {
143            throw new RuntimeException("Got exception " + ex);
144        }
145    }
146}
147