1   /*
2    * Copyright (c) 1998, 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 4127657
27   * @summary Check for correct handling of parameters to
28   *          XXXXReader.read(b, off, len).
29   *
30   */
31  
32  import java.io.*;
33  
34  public class ReadParams {
35      static int values[] = {Integer.MIN_VALUE, -1, 0, 1, 4, 16, 31,
36                             32, 33, Integer.MAX_VALUE};
37      static char b[][] = {null, new char[32]};
38  
39      static void test(Reader rdr) throws Exception {
40          int i = 0, j = 0, k = 0;
41          boolean nullPtr = false, indexOutBnd = false;
42  
43          for (i = 0; i < b.length; i++) {
44              for ( j = 0; j < values.length; j++) {
45                  for ( k = 0; k < values.length; k++) {
46  
47                      nullPtr = (b[i] == null);
48  
49                      int bufLen = nullPtr ? 0 : b[i].length;
50                      indexOutBnd = ((values[j] + values[k]) < 0)
51                          ||(values[j] < 0)
52                          || (values[j] > bufLen)
53                          || (values[k] < 0)
54                          || ((values[j] + values[k]) > bufLen);
55  
56                      try {
57                          rdr.read(b[i], values[j], values[k]);
58                      } catch (NullPointerException e) {
59                          if (!nullPtr) {
60                              throw new Exception
61                                  ("should not throw NullPointerException" + i + " " +j + " " + k);
62                          }
63                          continue;
64                      } catch (IndexOutOfBoundsException e) {
65                          if (!indexOutBnd) {
66                              throw new Exception
67                                  ("should not throw IndexOutOfBoundsException");
68                          }
69                          continue;
70                      }
71  
72                      if (nullPtr || indexOutBnd) {
73                          throw new Exception("Should have thrown an exception");
74                      }
75                  }
76              }
77          }
78      }
79  
80      public static void main(String args[]) throws Exception{
81          StringReader sr = new StringReader(new String(new byte[512]));
82          test(sr);
83  
84          test(new BufferedReader(sr));
85  
86          test(new CharArrayReader(new char[8]));
87  
88          InputStreamReader ir = new InputStreamReader
89              (new ByteArrayInputStream(new byte[512]));
90          test(ir);
91  
92          test(new PushbackReader(sr, 2));
93  
94          PipedWriter pw = new PipedWriter();
95          PipedReader pir = new PipedReader(pw);
96          pw.write(new char[512], 0, 512);
97          test(pir);
98      }
99  }