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J. Duke319a3b92007-12-01 00:00:00 +00001/*
2 * Copyright 2001 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
23
24/* @test
25 @bug 4526350
26 @summary Verify IOUtil.java reads to buffer limits
27 */
28import java.io.*;
29import java.nio.*;
30import java.nio.channels.*;
31
32public class ReadToLimit {
33 public static void main(String[] args) throws Exception {
34 File blah = File.createTempFile("blah", null);
35 blah.deleteOnExit();
36 initTestFile(blah);
37
38 ByteBuffer[] dstBuffers = new ByteBuffer[2];
39 for(int i=0; i<2; i++) {
40 dstBuffers[i] = ByteBuffer.allocateDirect(10);
41 dstBuffers[i].limit(5);
42 }
43 FileInputStream fis = new FileInputStream(blah);
44 FileChannel fc = fis.getChannel();
45 long bytesRead = fc.read(dstBuffers);
46 for(int i=0; i<2; i++)
47 if (dstBuffers[i].position() != 5)
48 throw new Exception("Test failed");
49 fc.close();
50 fis.close();
51 }
52
53 /**
54 * Creates file blah:
55 * 0000
56 * 0001
57 * 0002
58 * 0003
59 */
60 private static void initTestFile(File blah) throws Exception {
61 FileOutputStream fos = new FileOutputStream(blah);
62 BufferedWriter awriter
63 = new BufferedWriter(new OutputStreamWriter(fos, "8859_1"));
64
65 for(int i=0; i<4; i++) {
66 String number = new Integer(i).toString();
67 for (int h=0; h<4-number.length(); h++)
68 awriter.write("0");
69 awriter.write(""+i);
70 awriter.newLine();
71 }
72 awriter.flush();
73 awriter.close();
74 }
75}