1 /*

     2  * Copyright (c) 2011, 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 7110149

    27  * @summary Test basic deflater & inflater functionality

    28  */

    29 

    30 import java.io.*;

    31 import java.util.*;

    32 import java.util.zip.*;

    33 

    34 public class DeInflate {

    35 

    36     static void check(Deflater compresser, byte[] in, int len,

    37                       byte[] out1, byte[] out2, boolean nowrap)

    38         throws Throwable

    39     {

    40         Arrays.fill(out1, (byte)0);

    41         Arrays.fill(out2, (byte)0);

    42 

    43         compresser.setInput(in, 0, len);

    44         compresser.finish();

    45         int m = compresser.deflate(out1);

    46 

    47         Inflater decompresser = new Inflater(nowrap);

    48         decompresser.setInput(out1, 0, m);

    49         int n = decompresser.inflate(out2);

    50 

    51         if (n != len ||

    52             !Arrays.equals(Arrays.copyOf(in, len), Arrays.copyOf(out2, len)) ||

    53             decompresser.inflate(out2) != 0) {

    54             System.out.printf("m=%d, n=%d, len=%d, eq=%b%n",

    55                               m, n, len, Arrays.equals(in, out2));

    56             throw new RuntimeException("De/inflater failed:" + compresser);

    57         }

    58     }

    59 

    60     public static void main(String[] args) throws Throwable {

    61         byte[] dataIn = new byte[1024 * 512];

    62         new Random().nextBytes(dataIn);

    63         byte[] dataOut1 = new byte[dataIn.length + 1024];

    64         byte[] dataOut2 = new byte[dataIn.length];

    65         boolean wrap[] = new boolean[] { false, true };

    66 

    67         for (int level = Deflater.DEFAULT_COMPRESSION;

    68                  level <= Deflater.BEST_COMPRESSION; level++) {

    69             System.out.print("level=" + level + ", strategy= ");

    70             for (int strategy = Deflater.DEFAULT_STRATEGY;

    71                      strategy <= Deflater.HUFFMAN_ONLY; strategy++) {

    72                 System.out.print(" " + strategy + " nowrap[");

    73                 for (int dowrap = 0; dowrap <= 1; dowrap++) {

    74                     System.out.print(" " + wrap[dowrap]);

    75                     for (int i = 0; i < 5; i++) {

    76                         Deflater def = new Deflater(level, wrap[dowrap]);

    77                         if (strategy != Deflater.DEFAULT_STRATEGY) {

    78                             def.setStrategy(strategy);

    79                             // The first invocation after setLevel/Strategy()

    80                             // with a different level/stragety returns 0, if

    81                             // there is no need to flush out anything for the

    82                             // previous setting/"data", this is tricky and

    83                             // appears un-documented.

    84                             def.deflate(dataOut2);

    85                         }

    86                         int len = (i == 0)? dataIn.length

    87                                           : new Random().nextInt(dataIn.length);

    88                             check(def, dataIn, len, dataOut1, dataOut2, wrap[dowrap]);

    89                     }

    90                 }

    91                 System.out.print("] ");

    92             }

    93             System.out.println();

    94         }

    95     }

    96 }