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annotate app/src/main/java/com/jcraft/jzlib/JZlib.java @ 510:7953570e5210

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author Carl Byington <carl@five-ten-sg.com>
date Wed, 01 Feb 2023 17:55:29 -0700
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1 /* -*-mode:java; c-basic-offset:2; -*- */
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2 /*
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3 Copyright (c) 2011 ymnk, JCraft,Inc. All rights reserved.
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4
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5 Redistribution and use in source and binary forms, with or without
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6 modification, are permitted provided that the following conditions are met:
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7
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8 1. Redistributions of source code must retain the above copyright notice,
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9 this list of conditions and the following disclaimer.
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10
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11 2. Redistributions in binary form must reproduce the above copyright
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12 notice, this list of conditions and the following disclaimer in
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13 the documentation and/or other materials provided with the distribution.
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14
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15 3. The names of the authors may not be used to endorse or promote products
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16 derived from this software without specific prior written permission.
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17
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18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
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19 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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20 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
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21 INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
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22 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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24 OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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25 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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26 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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27 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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28 */
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29 /*
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30 * This program is based on zlib-1.1.3, so all credit should go authors
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31 * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
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32 * and contributors of zlib.
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33 */
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34
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35 package com.jcraft.jzlib;
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36
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37 final public class JZlib{
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38 private static final String version="1.1.0";
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39 public static String version(){return version;}
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41 static final public int MAX_WBITS=15; // 32K LZ77 window
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42 static final public int DEF_WBITS=MAX_WBITS;
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43
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44 public enum WrapperType {
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45 NONE, ZLIB, GZIP, ANY
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46 }
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48 public static final WrapperType W_NONE = WrapperType.NONE;
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49 public static final WrapperType W_ZLIB = WrapperType.ZLIB;
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50 public static final WrapperType W_GZIP = WrapperType.GZIP;
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51 public static final WrapperType W_ANY = WrapperType.ANY;
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52
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53 // compression levels
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54 static final public int Z_NO_COMPRESSION=0;
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55 static final public int Z_BEST_SPEED=1;
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56 static final public int Z_BEST_COMPRESSION=9;
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57 static final public int Z_DEFAULT_COMPRESSION=(-1);
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58
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59 // compression strategy
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60 static final public int Z_FILTERED=1;
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61 static final public int Z_HUFFMAN_ONLY=2;
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62 static final public int Z_DEFAULT_STRATEGY=0;
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63
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64 static final public int Z_NO_FLUSH=0;
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65 static final public int Z_PARTIAL_FLUSH=1;
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66 static final public int Z_SYNC_FLUSH=2;
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67 static final public int Z_FULL_FLUSH=3;
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68 static final public int Z_FINISH=4;
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70 static final public int Z_OK=0;
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71 static final public int Z_STREAM_END=1;
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72 static final public int Z_NEED_DICT=2;
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73 static final public int Z_ERRNO=-1;
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74 static final public int Z_STREAM_ERROR=-2;
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75 static final public int Z_DATA_ERROR=-3;
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76 static final public int Z_MEM_ERROR=-4;
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77 static final public int Z_BUF_ERROR=-5;
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78 static final public int Z_VERSION_ERROR=-6;
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79
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80 // The three kinds of block type
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81 static final public byte Z_BINARY = 0;
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82 static final public byte Z_ASCII = 1;
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83 static final public byte Z_UNKNOWN = 2;
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84
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85 public static long adler32_combine(long adler1, long adler2, long len2){
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86 return Adler32.combine(adler1, adler2, len2);
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87 }
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88
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89 public static long crc32_combine(long crc1, long crc2, long len2){
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90 return CRC32.combine(crc1, crc2, len2);
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91 }
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92 }