1 /*
   2  * Copyright (c) 2005, 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 5092263
  26  * @summary GZIPInputStream o GZIPOutputStream === the identity stream
  27  * @author Martin Buchholz
  28 */
  29 
  30 // To manually test for uncompressed streams larger than 2GB, do
  31 // javac Accordion.java && java -server Accordion 3325349068
  32 // javac Accordion.java && java -server Accordion 5470735564
  33 
  34 import java.io.*;
  35 import java.util.*;
  36 import java.util.zip.GZIPInputStream;
  37 import java.util.zip.GZIPOutputStream;
  38 
  39 public class Accordion {
  40     private static void readFully(InputStream s, byte[] buf) throws Throwable {
  41         int pos = 0;
  42         int n;
  43         while ((n = s.read(buf, pos, buf.length-pos)) > 0)
  44             pos += n;
  45         if (pos != buf.length)
  46             throw new Exception("Unexpected EOF");
  47     }
  48 
  49     private static volatile Throwable trouble;
  50 
  51     public static void main(String[] args) throws Throwable {
  52         if (args.length > 1)
  53             throw new Exception("Usage: java Accordion [BYTES]");
  54 
  55         final long bytes = args.length == 0 ? 10001 : Long.parseLong(args[0]);
  56         final int bufsize = 1729;
  57         final long count = bytes/bufsize;
  58         final PipedOutputStream out = new PipedOutputStream();
  59         final PipedInputStream in = new PipedInputStream(out);
  60         final Random random = new Random();
  61         final byte[] data = new byte[1729];
  62         for (int i = 0; i < data.length; i++)
  63             data[i] = (byte)random.nextInt(255);
  64         System.out.println("count="+count);
  65 
  66         Thread compressor = new Thread() { public void run() {
  67             try {
  68                 final GZIPOutputStream s = new GZIPOutputStream(out);
  69                 for (long i = 0; i < count; i++)
  70                     s.write(data, 0, data.length);
  71                 s.close();
  72             } catch (Throwable t) { trouble = t; }}};
  73 
  74         Thread uncompressor = new Thread() { public void run() {
  75             try {
  76                 final GZIPInputStream s = new GZIPInputStream(in);
  77                 final byte[] maybeBytes = new byte[data.length];
  78                 for (long i = 0; i < count; i++) {
  79                     readFully(s, maybeBytes);
  80                     if (! Arrays.equals(data, maybeBytes))
  81                         throw new Exception("data corruption");
  82                 }
  83                 if (s.read(maybeBytes, 0, 1) > 0)
  84                     throw new Exception("Unexpected NON-EOF");
  85                 s.close();
  86             } catch (Throwable t) { trouble = t; }}};
  87 
  88         compressor.start(); uncompressor.start();
  89         compressor.join();  uncompressor.join();
  90 
  91         if (trouble != null)
  92             throw trouble;
  93     }
  94 }