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annotate app/src/main/java/com/jcraft/jzlib/Deflater.java @ 483:84bab82d1f58

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author Carl Byington <carl@five-ten-sg.com>
date Mon, 01 Jun 2020 15:47:47 -0700
parents d29cce60f393
children
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357
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1 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
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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 Deflater extends ZStream{
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38
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39 static final private int MAX_WBITS=15; // 32K LZ77 window
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40 static final private int DEF_WBITS=MAX_WBITS;
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41
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42 static final private int Z_NO_FLUSH=0;
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43 static final private int Z_PARTIAL_FLUSH=1;
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44 static final private int Z_SYNC_FLUSH=2;
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45 static final private int Z_FULL_FLUSH=3;
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46 static final private int Z_FINISH=4;
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47
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48 static final private int MAX_MEM_LEVEL=9;
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49
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50 static final private int Z_OK=0;
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51 static final private int Z_STREAM_END=1;
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52 static final private int Z_NEED_DICT=2;
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53 static final private int Z_ERRNO=-1;
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54 static final private int Z_STREAM_ERROR=-2;
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55 static final private int Z_DATA_ERROR=-3;
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56 static final private int Z_MEM_ERROR=-4;
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57 static final private int Z_BUF_ERROR=-5;
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58 static final private int Z_VERSION_ERROR=-6;
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59
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60 private boolean finished = false;
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61
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62 public Deflater(){
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63 super();
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64 }
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65
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66 public Deflater(int level) throws GZIPException {
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67 this(level, MAX_WBITS);
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68 }
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69
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70 public Deflater(int level, boolean nowrap) throws GZIPException {
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71 this(level, MAX_WBITS, nowrap);
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72 }
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73
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74 public Deflater(int level, int bits) throws GZIPException {
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75 this(level, bits, false);
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76 }
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77
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78 public Deflater(int level, int bits, boolean nowrap) throws GZIPException {
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79 super();
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80 int ret = init(level, bits, nowrap);
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81 if(ret!=Z_OK)
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82 throw new GZIPException(ret+": "+msg);
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83 }
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84
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85 public Deflater(int level, int bits, int memlevel, JZlib.WrapperType wrapperType) throws GZIPException {
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86 super();
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87 int ret = init(level, bits, memlevel, wrapperType);
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88 if(ret!=Z_OK)
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89 throw new GZIPException(ret+": "+msg);
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90 }
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91
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92 public Deflater(int level, int bits, int memlevel) throws GZIPException {
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93 super();
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94 int ret = init(level, bits, memlevel);
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95 if(ret!=Z_OK)
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96 throw new GZIPException(ret+": "+msg);
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97 }
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98
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99 public int init(int level){
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100 return init(level, MAX_WBITS);
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101 }
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102 public int init(int level, boolean nowrap){
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103 return init(level, MAX_WBITS, nowrap);
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104 }
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105 public int init(int level, int bits){
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106 return init(level, bits, false);
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107 }
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108 public int init(int level, int bits, int memlevel, JZlib.WrapperType wrapperType){
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parents:
diff changeset
109 if(bits < 9 || bits > 15){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
110 return Z_STREAM_ERROR;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
111 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
112 if(wrapperType == JZlib.W_NONE) {
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
113 bits *= -1;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
114 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
115 else if(wrapperType == JZlib.W_GZIP) {
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
116 bits += 16;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
117 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
118 else if(wrapperType == JZlib.W_ANY) {
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
119 return Z_STREAM_ERROR;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
120 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
121 else if(wrapperType == JZlib.W_ZLIB) {
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
122 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
123 return init(level, bits, memlevel);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
124 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
125 public int init(int level, int bits, int memlevel){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
126 finished = false;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
127 dstate=new Deflate(this);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
128 return dstate.deflateInit(level, bits, memlevel);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
129 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
130 public int init(int level, int bits, boolean nowrap){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
131 finished = false;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
132 dstate=new Deflate(this);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
133 return dstate.deflateInit(level, nowrap?-bits:bits);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
134 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
135
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
136 public int deflate(int flush){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
137 if(dstate==null){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
138 return Z_STREAM_ERROR;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
139 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
140 int ret = dstate.deflate(flush);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
141 if(ret == Z_STREAM_END)
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
142 finished = true;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
143 return ret;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
144 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
145 public int end(){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
146 finished = true;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
147 if(dstate==null) return Z_STREAM_ERROR;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
148 int ret=dstate.deflateEnd();
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
149 dstate=null;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
150 free();
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
151 return ret;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
152 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
153 public int params(int level, int strategy){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
154 if(dstate==null) return Z_STREAM_ERROR;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
155 return dstate.deflateParams(level, strategy);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
156 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
157 public int setDictionary (byte[] dictionary, int dictLength){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
158 if(dstate == null)
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
159 return Z_STREAM_ERROR;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
160 return dstate.deflateSetDictionary(dictionary, dictLength);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
161 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
162
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
163 public boolean finished(){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
164 return finished;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
165 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
166
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
167 public int copy(Deflater src){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
168 this.finished = src.finished;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
169 return Deflate.deflateCopy(this, src);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
170 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
171 }