1/*
2 * Copyright (c) 1997, 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/* @test
25   @bug 1238944
26   @summary Check for correct implementation of LineNumberInputStream.available
27   */
28
29import java.io.*;
30
31
32public class Available {
33
34    static void check(int a, int bound) throws Exception {
35        if (a > bound) {
36            throw new Exception("Available returned " + a + " > " + bound);
37        }
38    }
39
40    public static void main(String args[]) throws Exception {
41        LineNumberInputStream in = new LineNumberInputStream(new MyInStream());
42        check(in.available(), 5);
43        in.read();
44        in.read();
45        check(in.available(), 4);
46        in.read();
47        in.read();
48        in.read();
49        check(in.available(), 2);
50    }
51
52}
53
54
55class MyInStream extends InputStream {
56
57    char[] buf = {'a', 'b', 'c', 'd', '\n',
58                  'e', 'f', '\r', '\n', 'g'};
59    int ctr = 0;
60
61    public int read() {
62        return ((ctr == 12) ? -1 : (int)buf[ctr++]);
63    }
64
65    public int available() {
66        return (10 - ctr);
67    }
68
69}
70