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annotate src/com/jcraft/jzlib/ZStream.java @ 384:b919cd3d6e2f

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author Carl Byington <carl@five-ten-sg.com>
date Wed, 06 Aug 2014 11:34:32 -0700
parents 46c2115ae1c8
children
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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) 2000-2011 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 /**
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38 * ZStream
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39 *
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40 * @deprecated Not for public use in the future.
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41 */
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42 @Deprecated
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43 public class ZStream{
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44
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45 static final private int MAX_WBITS=15; // 32K LZ77 window
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46 static final private int DEF_WBITS=MAX_WBITS;
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47
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48 static final private int Z_NO_FLUSH=0;
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49 static final private int Z_PARTIAL_FLUSH=1;
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50 static final private int Z_SYNC_FLUSH=2;
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51 static final private int Z_FULL_FLUSH=3;
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52 static final private int Z_FINISH=4;
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53
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54 static final private int MAX_MEM_LEVEL=9;
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55
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56 static final private int Z_OK=0;
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57 static final private int Z_STREAM_END=1;
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58 static final private int Z_NEED_DICT=2;
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59 static final private int Z_ERRNO=-1;
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60 static final private int Z_STREAM_ERROR=-2;
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61 static final private int Z_DATA_ERROR=-3;
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62 static final private int Z_MEM_ERROR=-4;
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63 static final private int Z_BUF_ERROR=-5;
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64 static final private int Z_VERSION_ERROR=-6;
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65
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66 public byte[] next_in; // next input byte
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67 public int next_in_index;
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68 public int avail_in; // number of bytes available at next_in
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69 public long total_in; // total nb of input bytes read so far
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70
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71 public byte[] next_out; // next output byte should be put there
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72 public int next_out_index;
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73 public int avail_out; // remaining free space at next_out
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74 public long total_out; // total nb of bytes output so far
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75
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76 public String msg;
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77
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78 Deflate dstate;
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79 Inflate istate;
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80
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81 int data_type; // best guess about the data type: ascii or binary
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82
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83 Checksum adler;
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84
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85 public ZStream(){
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86 this(new Adler32());
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87 }
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88
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89 public ZStream(Checksum adler){
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90 this.adler=adler;
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91 }
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92
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93 public int inflateInit(){
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94 return inflateInit(DEF_WBITS);
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95 }
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96 public int inflateInit(boolean nowrap){
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97 return inflateInit(DEF_WBITS, nowrap);
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98 }
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99 public int inflateInit(int w){
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100 return inflateInit(w, false);
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101 }
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102 public int inflateInit(JZlib.WrapperType wrapperType) {
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103 return inflateInit(DEF_WBITS, wrapperType);
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104 }
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105 public int inflateInit(int w, JZlib.WrapperType wrapperType) {
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106 boolean nowrap = false;
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107 if(wrapperType == JZlib.W_NONE){
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108 nowrap = true;
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109 }
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110 else if(wrapperType == JZlib.W_GZIP) {
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111 w += 16;
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112 }
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113 else if(wrapperType == JZlib.W_ANY) {
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114 w |= Inflate.INFLATE_ANY;
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115 }
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116 else if(wrapperType == JZlib.W_ZLIB) {
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117 }
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118 return inflateInit(w, nowrap);
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119 }
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120 public int inflateInit(int w, boolean nowrap){
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diff changeset
121 istate=new Inflate(this);
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diff changeset
122 return istate.inflateInit(nowrap?-w:w);
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parents: 0
diff changeset
123 }
0
0ce5cc452d02 initial version
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diff changeset
124
357
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diff changeset
125 public int inflate(int f){
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diff changeset
126 if(istate==null) return Z_STREAM_ERROR;
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diff changeset
127 return istate.inflate(f);
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diff changeset
128 }
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diff changeset
129 public int inflateEnd(){
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diff changeset
130 if(istate==null) return Z_STREAM_ERROR;
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diff changeset
131 int ret=istate.inflateEnd();
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diff changeset
132 // istate = null;
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diff changeset
133 return ret;
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parents: 0
diff changeset
134 }
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diff changeset
135 public int inflateSync(){
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parents: 0
diff changeset
136 if(istate == null)
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diff changeset
137 return Z_STREAM_ERROR;
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parents: 0
diff changeset
138 return istate.inflateSync();
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parents: 0
diff changeset
139 }
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diff changeset
140 public int inflateSyncPoint(){
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parents: 0
diff changeset
141 if(istate == null)
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diff changeset
142 return Z_STREAM_ERROR;
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parents: 0
diff changeset
143 return istate.inflateSyncPoint();
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diff changeset
144 }
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diff changeset
145 public int inflateSetDictionary(byte[] dictionary, int dictLength){
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parents: 0
diff changeset
146 if(istate == null)
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diff changeset
147 return Z_STREAM_ERROR;
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diff changeset
148 return istate.inflateSetDictionary(dictionary, dictLength);
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diff changeset
149 }
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diff changeset
150 public boolean inflateFinished(){
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diff changeset
151 return istate.mode==12 /*DONE*/;
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152 }
0
0ce5cc452d02 initial version
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diff changeset
153
357
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diff changeset
154 public int deflateInit(int level){
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diff changeset
155 return deflateInit(level, MAX_WBITS);
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
156 }
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
157 public int deflateInit(int level, boolean nowrap){
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parents: 0
diff changeset
158 return deflateInit(level, MAX_WBITS, nowrap);
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
159 }
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
160 public int deflateInit(int level, int bits){
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
161 return deflateInit(level, bits, false);
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
162 }
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
163 public int deflateInit(int level, int bits, int memlevel, JZlib.WrapperType wrapperType){
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
164 if(bits < 9 || bits > 15){
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diff changeset
165 return Z_STREAM_ERROR;
0
0ce5cc452d02 initial version
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parents:
diff changeset
166 }
357
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parents: 0
diff changeset
167 if(wrapperType == JZlib.W_NONE) {
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parents: 0
diff changeset
168 bits *= -1;
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
169 }
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parents: 0
diff changeset
170 else if(wrapperType == JZlib.W_GZIP) {
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
171 bits += 16;
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diff changeset
172 }
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parents: 0
diff changeset
173 else if(wrapperType == JZlib.W_ANY) {
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parents: 0
diff changeset
174 return Z_STREAM_ERROR;
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parents: 0
diff changeset
175 }
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
176 else if(wrapperType == JZlib.W_ZLIB) {
0
0ce5cc452d02 initial version
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diff changeset
177 }
357
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diff changeset
178 return this.deflateInit(level, bits, memlevel);
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diff changeset
179 }
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diff changeset
180 public int deflateInit(int level, int bits, int memlevel){
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diff changeset
181 dstate=new Deflate(this);
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diff changeset
182 return dstate.deflateInit(level, bits, memlevel);
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diff changeset
183 }
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diff changeset
184 public int deflateInit(int level, int bits, boolean nowrap){
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diff changeset
185 dstate=new Deflate(this);
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parents: 0
diff changeset
186 return dstate.deflateInit(level, nowrap?-bits:bits);
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
187 }
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
188 public int deflate(int flush){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
189 if(dstate==null){
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parents: 0
diff changeset
190 return Z_STREAM_ERROR;
0
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
191 }
357
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
192 return dstate.deflate(flush);
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
193 }
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
194 public int deflateEnd(){
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parents: 0
diff changeset
195 if(dstate==null) return Z_STREAM_ERROR;
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parents: 0
diff changeset
196 int ret=dstate.deflateEnd();
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parents: 0
diff changeset
197 dstate=null;
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
198 return ret;
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parents: 0
diff changeset
199 }
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
200 public int deflateParams(int level, int strategy){
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
201 if(dstate==null) return Z_STREAM_ERROR;
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
202 return dstate.deflateParams(level, strategy);
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
203 }
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
204 public int deflateSetDictionary (byte[] dictionary, int dictLength){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
205 if(dstate == null)
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
206 return Z_STREAM_ERROR;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
207 return dstate.deflateSetDictionary(dictionary, dictLength);
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
208 }
0
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
209
357
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
210 // Flush as much pending output as possible. All deflate() output goes
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
211 // through this function so some applications may wish to modify it
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
212 // to avoid allocating a large strm->next_out buffer and copying into it.
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
213 // (See also read_buf()).
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
214 void flush_pending(){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
215 int len=dstate.pending;
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
216
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
217 if(len>avail_out) len=avail_out;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
218 if(len==0) return;
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
219
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
220 if(dstate.pending_buf.length<=dstate.pending_out ||
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
221 next_out.length<=next_out_index ||
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
222 dstate.pending_buf.length<(dstate.pending_out+len) ||
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
223 next_out.length<(next_out_index+len)){
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
224 //System.out.println(dstate.pending_buf.length+", "+dstate.pending_out+
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
225 // ", "+next_out.length+", "+next_out_index+", "+len);
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
226 //System.out.println("avail_out="+avail_out);
0
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
227 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
228
357
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
229 System.arraycopy(dstate.pending_buf, dstate.pending_out,
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
230 next_out, next_out_index, len);
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
231
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
232 next_out_index+=len;
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233 dstate.pending_out+=len;
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diff changeset
234 total_out+=len;
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235 avail_out-=len;
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diff changeset
236 dstate.pending-=len;
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diff changeset
237 if(dstate.pending==0){
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diff changeset
238 dstate.pending_out=0;
0
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239 }
357
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240 }
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241
357
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242 // Read a new buffer from the current input stream, update the adler32
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243 // and total number of bytes read. All deflate() input goes through
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244 // this function so some applications may wish to modify it to avoid
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245 // allocating a large strm->next_in buffer and copying from it.
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246 // (See also flush_pending()).
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247 int read_buf(byte[] buf, int start, int size) {
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248 int len=avail_in;
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249
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250 if(len>size) len=size;
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251 if(len==0) return 0;
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252
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253 avail_in-=len;
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254
357
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255 if(dstate.wrap!=0) {
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diff changeset
256 adler.update(next_in, next_in_index, len);
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diff changeset
257 }
357
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diff changeset
258 System.arraycopy(next_in, next_in_index, buf, start, len);
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259 next_in_index += len;
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260 total_in += len;
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261 return len;
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262 }
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263
357
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264 public long getAdler(){
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265 return adler.getValue();
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266 }
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267
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268 public void free(){
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269 next_in=null;
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270 next_out=null;
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271 msg=null;
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272 }
0
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273
357
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274 public void setOutput(byte[] buf){
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275 setOutput(buf, 0, buf.length);
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276 }
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diff changeset
277
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diff changeset
278 public void setOutput(byte[] buf, int off, int len){
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diff changeset
279 next_out = buf;
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diff changeset
280 next_out_index = off;
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281 avail_out = len;
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282 }
0
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283
357
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diff changeset
284 public void setInput(byte[] buf){
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285 setInput(buf, 0, buf.length, false);
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286 }
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287
357
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288 public void setInput(byte[] buf, boolean append){
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289 setInput(buf, 0, buf.length, append);
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290 }
0
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291
357
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292 public void setInput(byte[] buf, int off, int len, boolean append){
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293 if(len<=0 && append && next_in!=null) return;
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294
357
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295 if(avail_in>0 && append){
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diff changeset
296 byte[] tmp = new byte[avail_in+len];
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diff changeset
297 System.arraycopy(next_in, next_in_index, tmp, 0, avail_in);
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298 System.arraycopy(buf, off, tmp, avail_in, len);
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299 next_in=tmp;
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300 next_in_index=0;
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301 avail_in+=len;
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diff changeset
302 }
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diff changeset
303 else{
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diff changeset
304 next_in=buf;
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diff changeset
305 next_in_index=off;
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diff changeset
306 avail_in=len;
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diff changeset
307 }
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diff changeset
308 }
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parents: 0
diff changeset
309
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diff changeset
310 public byte[] getNextIn(){
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diff changeset
311 return next_in;
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diff changeset
312 }
0
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313
357
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diff changeset
314 public void setNextIn(byte[] next_in){
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diff changeset
315 this.next_in = next_in;
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diff changeset
316 }
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diff changeset
317
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diff changeset
318 public int getNextInIndex(){
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diff changeset
319 return next_in_index;
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diff changeset
320 }
0
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diff changeset
321
357
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diff changeset
322 public void setNextInIndex(int next_in_index){
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diff changeset
323 this.next_in_index = next_in_index;
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diff changeset
324 }
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diff changeset
325
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diff changeset
326 public int getAvailIn(){
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diff changeset
327 return avail_in;
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diff changeset
328 }
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diff changeset
329
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diff changeset
330 public void setAvailIn(int avail_in){
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diff changeset
331 this.avail_in = avail_in;
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diff changeset
332 }
0
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parents:
diff changeset
333
357
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diff changeset
334 public byte[] getNextOut(){
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diff changeset
335 return next_out;
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diff changeset
336 }
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diff changeset
337
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diff changeset
338 public void setNextOut(byte[] next_out){
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diff changeset
339 this.next_out = next_out;
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diff changeset
340 }
0
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diff changeset
341
357
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diff changeset
342 public int getNextOutIndex(){
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diff changeset
343 return next_out_index;
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diff changeset
344 }
0
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diff changeset
345
357
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diff changeset
346 public void setNextOutIndex(int next_out_index){
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diff changeset
347 this.next_out_index = next_out_index;
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diff changeset
348 }
0
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diff changeset
349
357
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350 public int getAvailOut(){
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351 return avail_out;
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352
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353 }
0
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354
357
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355 public void setAvailOut(int avail_out){
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356 this.avail_out = avail_out;
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357 }
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358
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359 public long getTotalOut(){
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360 return total_out;
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361 }
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362
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363 public long getTotalIn(){
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364 return total_in;
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365 }
0
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366
357
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367 public String getMessage(){
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368 return msg;
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369 }
0
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370
357
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371 /**
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372 * Those methods are expected to be override by Inflater and Deflater.
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373 * In the future, they will become abstract methods.
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374 */
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375 public int end(){ return Z_OK; }
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376 public boolean finished(){ return false; }
0
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377 }