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annotate src/com/jcraft/jzlib/Deflate.java @ 424:09c1d3aae3f0
updateDirty before testChanged, try to eliminate sending duplicate screenChanged to the monitor
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Fri, 31 Oct 2014 12:40:09 -0700 |
| parents | 46c2115ae1c8 |
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| rev | line source |
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| 0 | 1 /* -*-mode:java; c-basic-offset:2; -*- */ |
| 2 /* | |
|
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3 Copyright (c) 2000-2011 ymnk, JCraft,Inc. All rights reserved. |
| 0 | 4 |
| 5 Redistribution and use in source and binary forms, with or without | |
| 6 modification, are permitted provided that the following conditions are met: | |
| 7 | |
| 8 1. Redistributions of source code must retain the above copyright notice, | |
| 9 this list of conditions and the following disclaimer. | |
| 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 |
| 0 | 13 the documentation and/or other materials provided with the distribution. |
| 14 | |
| 15 3. The names of the authors may not be used to endorse or promote products | |
| 16 derived from this software without specific prior written permission. | |
| 17 | |
| 18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, | |
| 19 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 20 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT, | |
| 21 INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 22 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, | |
| 24 OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 25 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 26 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
| 27 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 28 */ | |
| 29 /* | |
| 30 * This program is based on zlib-1.1.3, so all credit should go authors | |
| 31 * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu) | |
| 32 * and contributors of zlib. | |
| 33 */ | |
| 34 | |
| 35 package com.jcraft.jzlib; | |
| 36 | |
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37 public |
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38 final class Deflate implements Cloneable { |
| 0 | 39 |
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40 static final private int MAX_MEM_LEVEL=9; |
| 0 | 41 |
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42 static final private int Z_DEFAULT_COMPRESSION=-1; |
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43 |
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44 static final private int MAX_WBITS=15; // 32K LZ77 window |
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45 static final private int DEF_MEM_LEVEL=8; |
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47 static class Config{ |
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48 int good_length; // reduce lazy search above this match length |
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49 int max_lazy; // do not perform lazy search above this match length |
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50 int nice_length; // quit search above this match length |
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51 int max_chain; |
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52 int func; |
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53 Config(int good_length, int max_lazy, |
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54 int nice_length, int max_chain, int func){ |
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55 this.good_length=good_length; |
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56 this.max_lazy=max_lazy; |
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57 this.nice_length=nice_length; |
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58 this.max_chain=max_chain; |
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59 this.func=func; |
| 0 | 60 } |
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61 } |
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62 |
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63 static final private int STORED=0; |
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64 static final private int FAST=1; |
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65 static final private int SLOW=2; |
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66 static final private Config[] config_table; |
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67 static{ |
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68 config_table=new Config[10]; |
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69 // good lazy nice chain |
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70 config_table[0]=new Config(0, 0, 0, 0, STORED); |
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71 config_table[1]=new Config(4, 4, 8, 4, FAST); |
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72 config_table[2]=new Config(4, 5, 16, 8, FAST); |
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73 config_table[3]=new Config(4, 6, 32, 32, FAST); |
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75 config_table[4]=new Config(4, 4, 16, 16, SLOW); |
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76 config_table[5]=new Config(8, 16, 32, 32, SLOW); |
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77 config_table[6]=new Config(8, 16, 128, 128, SLOW); |
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78 config_table[7]=new Config(8, 32, 128, 256, SLOW); |
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79 config_table[8]=new Config(32, 128, 258, 1024, SLOW); |
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80 config_table[9]=new Config(32, 258, 258, 4096, SLOW); |
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81 } |
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83 static final private String[] z_errmsg = { |
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84 "need dictionary", // Z_NEED_DICT 2 |
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85 "stream end", // Z_STREAM_END 1 |
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86 "", // Z_OK 0 |
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87 "file error", // Z_ERRNO (-1) |
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88 "stream error", // Z_STREAM_ERROR (-2) |
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89 "data error", // Z_DATA_ERROR (-3) |
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90 "insufficient memory", // Z_MEM_ERROR (-4) |
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91 "buffer error", // Z_BUF_ERROR (-5) |
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92 "incompatible version",// Z_VERSION_ERROR (-6) |
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93 "" |
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94 }; |
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96 // block not completed, need more input or more output |
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97 static final private int NeedMore=0; |
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98 |
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99 // block flush performed |
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100 static final private int BlockDone=1; |
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102 // finish started, need only more output at next deflate |
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103 static final private int FinishStarted=2; |
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104 |
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105 // finish done, accept no more input or output |
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106 static final private int FinishDone=3; |
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107 |
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108 // preset dictionary flag in zlib header |
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109 static final private int PRESET_DICT=0x20; |
| 0 | 110 |
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111 static final private int Z_FILTERED=1; |
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112 static final private int Z_HUFFMAN_ONLY=2; |
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113 static final private int Z_DEFAULT_STRATEGY=0; |
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115 static final private int Z_NO_FLUSH=0; |
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116 static final private int Z_PARTIAL_FLUSH=1; |
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117 static final private int Z_SYNC_FLUSH=2; |
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118 static final private int Z_FULL_FLUSH=3; |
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119 static final private int Z_FINISH=4; |
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121 static final private int Z_OK=0; |
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122 static final private int Z_STREAM_END=1; |
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123 static final private int Z_NEED_DICT=2; |
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124 static final private int Z_ERRNO=-1; |
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125 static final private int Z_STREAM_ERROR=-2; |
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126 static final private int Z_DATA_ERROR=-3; |
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127 static final private int Z_MEM_ERROR=-4; |
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128 static final private int Z_BUF_ERROR=-5; |
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129 static final private int Z_VERSION_ERROR=-6; |
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131 static final private int INIT_STATE=42; |
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132 static final private int BUSY_STATE=113; |
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133 static final private int FINISH_STATE=666; |
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135 // The deflate compression method |
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136 static final private int Z_DEFLATED=8; |
| 0 | 137 |
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138 static final private int STORED_BLOCK=0; |
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139 static final private int STATIC_TREES=1; |
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140 static final private int DYN_TREES=2; |
| 0 | 141 |
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142 // The three kinds of block type |
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143 static final private int Z_BINARY=0; |
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144 static final private int Z_ASCII=1; |
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145 static final private int Z_UNKNOWN=2; |
| 0 | 146 |
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147 static final private int Buf_size=8*2; |
| 0 | 148 |
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149 // repeat previous bit length 3-6 times (2 bits of repeat count) |
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150 static final private int REP_3_6=16; |
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151 |
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152 // repeat a zero length 3-10 times (3 bits of repeat count) |
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153 static final private int REPZ_3_10=17; |
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155 // repeat a zero length 11-138 times (7 bits of repeat count) |
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156 static final private int REPZ_11_138=18; |
| 0 | 157 |
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158 static final private int MIN_MATCH=3; |
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159 static final private int MAX_MATCH=258; |
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160 static final private int MIN_LOOKAHEAD=(MAX_MATCH+MIN_MATCH+1); |
| 0 | 161 |
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162 static final private int MAX_BITS=15; |
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163 static final private int D_CODES=30; |
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164 static final private int BL_CODES=19; |
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165 static final private int LENGTH_CODES=29; |
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166 static final private int LITERALS=256; |
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167 static final private int L_CODES=(LITERALS+1+LENGTH_CODES); |
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168 static final private int HEAP_SIZE=(2*L_CODES+1); |
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170 static final private int END_BLOCK=256; |
| 0 | 171 |
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172 ZStream strm; // pointer back to this zlib stream |
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173 int status; // as the name implies |
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174 byte[] pending_buf; // output still pending |
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175 int pending_buf_size; // size of pending_buf |
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176 int pending_out; // next pending byte to output to the stream |
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177 int pending; // nb of bytes in the pending buffer |
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178 int wrap = 1; |
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179 byte data_type; // UNKNOWN, BINARY or ASCII |
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180 byte method; // STORED (for zip only) or DEFLATED |
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181 int last_flush; // value of flush param for previous deflate call |
| 0 | 182 |
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183 int w_size; // LZ77 window size (32K by default) |
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184 int w_bits; // log2(w_size) (8..16) |
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185 int w_mask; // w_size - 1 |
| 0 | 186 |
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187 byte[] window; |
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188 // Sliding window. Input bytes are read into the second half of the window, |
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189 // and move to the first half later to keep a dictionary of at least wSize |
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190 // bytes. With this organization, matches are limited to a distance of |
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191 // wSize-MAX_MATCH bytes, but this ensures that IO is always |
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192 // performed with a length multiple of the block size. Also, it limits |
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193 // the window size to 64K, which is quite useful on MSDOS. |
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194 // To do: use the user input buffer as sliding window. |
| 0 | 195 |
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196 int window_size; |
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197 // Actual size of window: 2*wSize, except when the user input buffer |
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198 // is directly used as sliding window. |
| 0 | 199 |
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200 short[] prev; |
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201 // Link to older string with same hash index. To limit the size of this |
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202 // array to 64K, this link is maintained only for the last 32K strings. |
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203 // An index in this array is thus a window index modulo 32K. |
| 0 | 204 |
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205 short[] head; // Heads of the hash chains or NIL. |
| 0 | 206 |
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207 int ins_h; // hash index of string to be inserted |
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208 int hash_size; // number of elements in hash table |
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209 int hash_bits; // log2(hash_size) |
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210 int hash_mask; // hash_size-1 |
| 0 | 211 |
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212 // Number of bits by which ins_h must be shifted at each input |
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213 // step. It must be such that after MIN_MATCH steps, the oldest |
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214 // byte no longer takes part in the hash key, that is: |
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215 // hash_shift * MIN_MATCH >= hash_bits |
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216 int hash_shift; |
| 0 | 217 |
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218 // Window position at the beginning of the current output block. Gets |
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219 // negative when the window is moved backwards. |
| 0 | 220 |
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221 int block_start; |
| 0 | 222 |
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223 int match_length; // length of best match |
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224 int prev_match; // previous match |
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225 int match_available; // set if previous match exists |
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226 int strstart; // start of string to insert |
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227 int match_start; // start of matching string |
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228 int lookahead; // number of valid bytes ahead in window |
| 0 | 229 |
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230 // Length of the best match at previous step. Matches not greater than this |
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231 // are discarded. This is used in the lazy match evaluation. |
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232 int prev_length; |
| 0 | 233 |
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234 // To speed up deflation, hash chains are never searched beyond this |
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235 // length. A higher limit improves compression ratio but degrades the speed. |
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236 int max_chain_length; |
| 0 | 237 |
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238 // Attempt to find a better match only when the current match is strictly |
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239 // smaller than this value. This mechanism is used only for compression |
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240 // levels >= 4. |
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241 int max_lazy_match; |
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242 |
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243 // Insert new strings in the hash table only if the match length is not |
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244 // greater than this length. This saves time but degrades compression. |
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245 // max_insert_length is used only for compression levels <= 3. |
| 0 | 246 |
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247 int level; // compression level (1..9) |
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248 int strategy; // favor or force Huffman coding |
| 0 | 249 |
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250 // Use a faster search when the previous match is longer than this |
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251 int good_match; |
| 0 | 252 |
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253 // Stop searching when current match exceeds this |
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254 int nice_match; |
| 0 | 255 |
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256 short[] dyn_ltree; // literal and length tree |
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257 short[] dyn_dtree; // distance tree |
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258 short[] bl_tree; // Huffman tree for bit lengths |
| 0 | 259 |
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260 Tree l_desc=new Tree(); // desc for literal tree |
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261 Tree d_desc=new Tree(); // desc for distance tree |
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262 Tree bl_desc=new Tree(); // desc for bit length tree |
| 0 | 263 |
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264 // number of codes at each bit length for an optimal tree |
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265 short[] bl_count=new short[MAX_BITS+1]; |
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266 // working area to be used in Tree#gen_codes() |
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267 short[] next_code=new short[MAX_BITS+1]; |
| 0 | 268 |
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269 // heap used to build the Huffman trees |
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270 int[] heap=new int[2*L_CODES+1]; |
| 0 | 271 |
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272 int heap_len; // number of elements in the heap |
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273 int heap_max; // element of largest frequency |
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274 // The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used. |
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275 // The same heap array is used to build all trees. |
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276 |
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277 // Depth of each subtree used as tie breaker for trees of equal frequency |
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278 byte[] depth=new byte[2*L_CODES+1]; |
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279 |
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280 byte[] l_buf; // index for literals or lengths */ |
| 0 | 281 |
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282 // Size of match buffer for literals/lengths. There are 4 reasons for |
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283 // limiting lit_bufsize to 64K: |
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284 // - frequencies can be kept in 16 bit counters |
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285 // - if compression is not successful for the first block, all input |
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286 // data is still in the window so we can still emit a stored block even |
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287 // when input comes from standard input. (This can also be done for |
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288 // all blocks if lit_bufsize is not greater than 32K.) |
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289 // - if compression is not successful for a file smaller than 64K, we can |
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290 // even emit a stored file instead of a stored block (saving 5 bytes). |
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291 // This is applicable only for zip (not gzip or zlib). |
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292 // - creating new Huffman trees less frequently may not provide fast |
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293 // adaptation to changes in the input data statistics. (Take for |
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294 // example a binary file with poorly compressible code followed by |
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295 // a highly compressible string table.) Smaller buffer sizes give |
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296 // fast adaptation but have of course the overhead of transmitting |
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297 // trees more frequently. |
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298 // - I can't count above 4 |
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299 int lit_bufsize; |
| 0 | 300 |
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301 int last_lit; // running index in l_buf |
| 0 | 302 |
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303 // Buffer for distances. To simplify the code, d_buf and l_buf have |
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304 // the same number of elements. To use different lengths, an extra flag |
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305 // array would be necessary. |
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306 |
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307 int d_buf; // index of pendig_buf |
| 0 | 308 |
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309 int opt_len; // bit length of current block with optimal trees |
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310 int static_len; // bit length of current block with static trees |
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311 int matches; // number of string matches in current block |
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312 int last_eob_len; // bit length of EOB code for last block |
| 0 | 313 |
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314 // Output buffer. bits are inserted starting at the bottom (least |
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315 // significant bits). |
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316 short bi_buf; |
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317 |
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318 // Number of valid bits in bi_buf. All bits above the last valid bit |
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319 // are always zero. |
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320 int bi_valid; |
| 0 | 321 |
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322 GZIPHeader gheader = null; |
| 0 | 323 |
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324 Deflate(ZStream strm){ |
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325 this.strm=strm; |
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326 dyn_ltree=new short[HEAP_SIZE*2]; |
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327 dyn_dtree=new short[(2*D_CODES+1)*2]; // distance tree |
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328 bl_tree=new short[(2*BL_CODES+1)*2]; // Huffman tree for bit lengths |
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329 } |
| 0 | 330 |
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331 void lm_init() { |
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332 window_size=2*w_size; |
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333 |
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334 head[hash_size-1]=0; |
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335 for(int i=0; i<hash_size-1; i++){ |
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336 head[i]=0; |
| 0 | 337 } |
| 338 | |
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339 // Set the default configuration parameters: |
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340 max_lazy_match = Deflate.config_table[level].max_lazy; |
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341 good_match = Deflate.config_table[level].good_length; |
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342 nice_match = Deflate.config_table[level].nice_length; |
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343 max_chain_length = Deflate.config_table[level].max_chain; |
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344 |
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345 strstart = 0; |
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346 block_start = 0; |
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347 lookahead = 0; |
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348 match_length = prev_length = MIN_MATCH-1; |
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349 match_available = 0; |
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350 ins_h = 0; |
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351 } |
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352 |
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353 // Initialize the tree data structures for a new zlib stream. |
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354 void tr_init(){ |
| 0 | 355 |
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356 l_desc.dyn_tree = dyn_ltree; |
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357 l_desc.stat_desc = StaticTree.static_l_desc; |
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358 |
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359 d_desc.dyn_tree = dyn_dtree; |
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360 d_desc.stat_desc = StaticTree.static_d_desc; |
| 0 | 361 |
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362 bl_desc.dyn_tree = bl_tree; |
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363 bl_desc.stat_desc = StaticTree.static_bl_desc; |
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364 |
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365 bi_buf = 0; |
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366 bi_valid = 0; |
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367 last_eob_len = 8; // enough lookahead for inflate |
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368 |
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369 // Initialize the first block of the first file: |
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370 init_block(); |
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371 } |
| 0 | 372 |
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357
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373 void init_block(){ |
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374 // Initialize the trees. |
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375 for(int i = 0; i < L_CODES; i++) dyn_ltree[i*2] = 0; |
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376 for(int i= 0; i < D_CODES; i++) dyn_dtree[i*2] = 0; |
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377 for(int i= 0; i < BL_CODES; i++) bl_tree[i*2] = 0; |
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378 |
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379 dyn_ltree[END_BLOCK*2] = 1; |
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380 opt_len = static_len = 0; |
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381 last_lit = matches = 0; |
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382 } |
| 0 | 383 |
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384 // Restore the heap property by moving down the tree starting at node k, |
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385 // exchanging a node with the smallest of its two sons if necessary, stopping |
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386 // when the heap property is re-established (each father smaller than its |
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387 // two sons). |
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388 void pqdownheap(short[] tree, // the tree to restore |
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389 int k // node to move down |
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390 ){ |
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391 int v = heap[k]; |
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392 int j = k << 1; // left son of k |
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393 while (j <= heap_len) { |
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394 // Set j to the smallest of the two sons: |
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395 if (j < heap_len && |
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396 smaller(tree, heap[j+1], heap[j], depth)){ |
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397 j++; |
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398 } |
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399 // Exit if v is smaller than both sons |
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400 if(smaller(tree, v, heap[j], depth)) break; |
| 0 | 401 |
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402 // Exchange v with the smallest son |
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403 heap[k]=heap[j]; k = j; |
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404 // And continue down the tree, setting j to the left son of k |
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405 j <<= 1; |
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406 } |
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407 heap[k] = v; |
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408 } |
| 0 | 409 |
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410 static boolean smaller(short[] tree, int n, int m, byte[] depth){ |
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411 short tn2=tree[n*2]; |
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412 short tm2=tree[m*2]; |
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413 return (tn2<tm2 || |
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414 (tn2==tm2 && depth[n] <= depth[m])); |
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415 } |
| 0 | 416 |
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417 // Scan a literal or distance tree to determine the frequencies of the codes |
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418 // in the bit length tree. |
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419 void scan_tree (short[] tree,// the tree to be scanned |
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420 int max_code // and its largest code of non zero frequency |
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421 ){ |
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422 int n; // iterates over all tree elements |
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423 int prevlen = -1; // last emitted length |
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424 int curlen; // length of current code |
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425 int nextlen = tree[0*2+1]; // length of next code |
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426 int count = 0; // repeat count of the current code |
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427 int max_count = 7; // max repeat count |
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428 int min_count = 4; // min repeat count |
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429 |
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430 if (nextlen == 0){ max_count = 138; min_count = 3; } |
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431 tree[(max_code+1)*2+1] = (short)0xffff; // guard |
| 0 | 432 |
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433 for(n = 0; n <= max_code; n++) { |
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434 curlen = nextlen; nextlen = tree[(n+1)*2+1]; |
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435 if(++count < max_count && curlen == nextlen) { |
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436 continue; |
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437 } |
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438 else if(count < min_count) { |
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439 bl_tree[curlen*2] += count; |
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440 } |
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441 else if(curlen != 0) { |
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442 if(curlen != prevlen) bl_tree[curlen*2]++; |
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443 bl_tree[REP_3_6*2]++; |
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444 } |
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445 else if(count <= 10) { |
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446 bl_tree[REPZ_3_10*2]++; |
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447 } |
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448 else{ |
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449 bl_tree[REPZ_11_138*2]++; |
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450 } |
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451 count = 0; prevlen = curlen; |
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452 if(nextlen == 0) { |
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453 max_count = 138; min_count = 3; |
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454 } |
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455 else if(curlen == nextlen) { |
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456 max_count = 6; min_count = 3; |
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457 } |
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458 else{ |
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459 max_count = 7; min_count = 4; |
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460 } |
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461 } |
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462 } |
| 0 | 463 |
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464 // Construct the Huffman tree for the bit lengths and return the index in |
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465 // bl_order of the last bit length code to send. |
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466 int build_bl_tree(){ |
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467 int max_blindex; // index of last bit length code of non zero freq |
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468 |
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469 // Determine the bit length frequencies for literal and distance trees |
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470 scan_tree(dyn_ltree, l_desc.max_code); |
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471 scan_tree(dyn_dtree, d_desc.max_code); |
| 0 | 472 |
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473 // Build the bit length tree: |
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474 bl_desc.build_tree(this); |
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475 // opt_len now includes the length of the tree representations, except |
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476 // the lengths of the bit lengths codes and the 5+5+4 bits for the counts. |
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477 |
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478 // Determine the number of bit length codes to send. The pkzip format |
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479 // requires that at least 4 bit length codes be sent. (appnote.txt says |
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480 // 3 but the actual value used is 4.) |
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481 for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) { |
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482 if (bl_tree[Tree.bl_order[max_blindex]*2+1] != 0) break; |
| 0 | 483 } |
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484 // Update opt_len to include the bit length tree and counts |
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485 opt_len += 3*(max_blindex+1) + 5+5+4; |
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486 |
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487 return max_blindex; |
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488 } |
| 0 | 489 |
| 490 | |
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491 // Send the header for a block using dynamic Huffman trees: the counts, the |
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492 // lengths of the bit length codes, the literal tree and the distance tree. |
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493 // IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4. |
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494 void send_all_trees(int lcodes, int dcodes, int blcodes){ |
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495 int rank; // index in bl_order |
| 0 | 496 |
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497 send_bits(lcodes-257, 5); // not +255 as stated in appnote.txt |
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498 send_bits(dcodes-1, 5); |
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499 send_bits(blcodes-4, 4); // not -3 as stated in appnote.txt |
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500 for (rank = 0; rank < blcodes; rank++) { |
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501 send_bits(bl_tree[Tree.bl_order[rank]*2+1], 3); |
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502 } |
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503 send_tree(dyn_ltree, lcodes-1); // literal tree |
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504 send_tree(dyn_dtree, dcodes-1); // distance tree |
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505 } |
| 0 | 506 |
|
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507 // Send a literal or distance tree in compressed form, using the codes in |
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508 // bl_tree. |
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509 void send_tree (short[] tree,// the tree to be sent |
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510 int max_code // and its largest code of non zero frequency |
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511 ){ |
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512 int n; // iterates over all tree elements |
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513 int prevlen = -1; // last emitted length |
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514 int curlen; // length of current code |
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515 int nextlen = tree[0*2+1]; // length of next code |
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516 int count = 0; // repeat count of the current code |
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517 int max_count = 7; // max repeat count |
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518 int min_count = 4; // min repeat count |
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519 |
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520 if (nextlen == 0){ max_count = 138; min_count = 3; } |
| 0 | 521 |
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522 for (n = 0; n <= max_code; n++) { |
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523 curlen = nextlen; nextlen = tree[(n+1)*2+1]; |
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524 if(++count < max_count && curlen == nextlen) { |
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525 continue; |
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526 } |
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527 else if(count < min_count) { |
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528 do { send_code(curlen, bl_tree); } while (--count != 0); |
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529 } |
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530 else if(curlen != 0){ |
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531 if(curlen != prevlen){ |
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532 send_code(curlen, bl_tree); count--; |
|
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533 } |
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534 send_code(REP_3_6, bl_tree); |
|
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535 send_bits(count-3, 2); |
|
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536 } |
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537 else if(count <= 10){ |
|
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538 send_code(REPZ_3_10, bl_tree); |
|
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539 send_bits(count-3, 3); |
|
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540 } |
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541 else{ |
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542 send_code(REPZ_11_138, bl_tree); |
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543 send_bits(count-11, 7); |
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544 } |
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545 count = 0; prevlen = curlen; |
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546 if(nextlen == 0){ |
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547 max_count = 138; min_count = 3; |
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548 } |
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549 else if(curlen == nextlen){ |
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550 max_count = 6; min_count = 3; |
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551 } |
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552 else{ |
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553 max_count = 7; min_count = 4; |
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554 } |
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555 } |
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556 } |
| 0 | 557 |
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558 // Output a byte on the stream. |
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559 // IN assertion: there is enough room in pending_buf. |
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560 final void put_byte(byte[] p, int start, int len){ |
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561 System.arraycopy(p, start, pending_buf, pending, len); |
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562 pending+=len; |
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563 } |
| 0 | 564 |
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565 final void put_byte(byte c){ |
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566 pending_buf[pending++]=c; |
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567 } |
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568 final void put_short(int w) { |
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569 put_byte((byte)(w/*&0xff*/)); |
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570 put_byte((byte)(w>>>8)); |
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571 } |
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572 final void putShortMSB(int b){ |
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573 put_byte((byte)(b>>8)); |
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574 put_byte((byte)(b/*&0xff*/)); |
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575 } |
| 0 | 576 |
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577 final void send_code(int c, short[] tree){ |
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578 int c2=c*2; |
|
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579 send_bits((tree[c2]&0xffff), (tree[c2+1]&0xffff)); |
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580 } |
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581 |
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582 void send_bits(int value, int length){ |
|
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583 int len = length; |
|
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584 if (bi_valid > (int)Buf_size - len) { |
|
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585 int val = value; |
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586 // bi_buf |= (val << bi_valid); |
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587 bi_buf |= ((val << bi_valid)&0xffff); |
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588 put_short(bi_buf); |
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589 bi_buf = (short)(val >>> (Buf_size - bi_valid)); |
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590 bi_valid += len - Buf_size; |
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591 } else { |
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592 // bi_buf |= (value) << bi_valid; |
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593 bi_buf |= (((value) << bi_valid)&0xffff); |
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594 bi_valid += len; |
| 0 | 595 } |
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596 } |
| 0 | 597 |
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598 // Send one empty static block to give enough lookahead for inflate. |
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599 // This takes 10 bits, of which 7 may remain in the bit buffer. |
|
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600 // The current inflate code requires 9 bits of lookahead. If the |
|
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601 // last two codes for the previous block (real code plus EOB) were coded |
|
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602 // on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode |
|
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603 // the last real code. In this case we send two empty static blocks instead |
|
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604 // of one. (There are no problems if the previous block is stored or fixed.) |
|
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605 // To simplify the code, we assume the worst case of last real code encoded |
|
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606 // on one bit only. |
|
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607 void _tr_align(){ |
|
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608 send_bits(STATIC_TREES<<1, 3); |
|
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609 send_code(END_BLOCK, StaticTree.static_ltree); |
| 0 | 610 |
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611 bi_flush(); |
| 0 | 612 |
|
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613 // Of the 10 bits for the empty block, we have already sent |
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614 // (10 - bi_valid) bits. The lookahead for the last real code (before |
|
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615 // the EOB of the previous block) was thus at least one plus the length |
|
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616 // of the EOB plus what we have just sent of the empty static block. |
|
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617 if (1 + last_eob_len + 10 - bi_valid < 9) { |
|
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618 send_bits(STATIC_TREES<<1, 3); |
|
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619 send_code(END_BLOCK, StaticTree.static_ltree); |
|
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620 bi_flush(); |
|
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621 } |
|
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622 last_eob_len = 7; |
|
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623 } |
|
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624 |
| 0 | 625 |
|
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626 // Save the match info and tally the frequency counts. Return true if |
|
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627 // the current block must be flushed. |
|
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628 boolean _tr_tally (int dist, // distance of matched string |
|
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629 int lc // match length-MIN_MATCH or unmatched char (if dist==0) |
|
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630 ){ |
|
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631 |
|
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632 pending_buf[d_buf+last_lit*2] = (byte)(dist>>>8); |
|
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633 pending_buf[d_buf+last_lit*2+1] = (byte)dist; |
|
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634 |
|
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635 l_buf[last_lit] = (byte)lc; last_lit++; |
|
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636 |
|
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637 if (dist == 0) { |
|
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638 // lc is the unmatched char |
|
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639 dyn_ltree[lc*2]++; |
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640 } |
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641 else { |
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642 matches++; |
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643 // Here, lc is the match length - MIN_MATCH |
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644 dist--; // dist = match distance - 1 |
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645 dyn_ltree[(Tree._length_code[lc]+LITERALS+1)*2]++; |
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646 dyn_dtree[Tree.d_code(dist)*2]++; |
| 0 | 647 } |
| 648 | |
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649 if ((last_lit & 0x1fff) == 0 && level > 2) { |
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650 // Compute an upper bound for the compressed length |
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651 int out_length = last_lit*8; |
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652 int in_length = strstart - block_start; |
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653 int dcode; |
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654 for (dcode = 0; dcode < D_CODES; dcode++) { |
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655 out_length += (int)dyn_dtree[dcode*2] * |
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656 (5L+Tree.extra_dbits[dcode]); |
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657 } |
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658 out_length >>>= 3; |
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659 if ((matches < (last_lit/2)) && out_length < in_length/2) return true; |
| 0 | 660 } |
| 661 | |
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662 return (last_lit == lit_bufsize-1); |
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663 // We avoid equality with lit_bufsize because of wraparound at 64K |
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664 // on 16 bit machines and because stored blocks are restricted to |
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665 // 64K-1 bytes. |
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666 } |
| 0 | 667 |
|
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668 // Send the block data compressed using the given Huffman trees |
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669 void compress_block(short[] ltree, short[] dtree){ |
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670 int dist; // distance of matched string |
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671 int lc; // match length or unmatched char (if dist == 0) |
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672 int lx = 0; // running index in l_buf |
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673 int code; // the code to send |
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674 int extra; // number of extra bits to send |
|
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675 |
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676 if (last_lit != 0){ |
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677 do{ |
|
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678 dist=((pending_buf[d_buf+lx*2]<<8)&0xff00)| |
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679 (pending_buf[d_buf+lx*2+1]&0xff); |
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680 lc=(l_buf[lx])&0xff; lx++; |
| 0 | 681 |
|
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682 if(dist == 0){ |
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683 send_code(lc, ltree); // send a literal byte |
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684 } |
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685 else{ |
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686 // Here, lc is the match length - MIN_MATCH |
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687 code = Tree._length_code[lc]; |
| 0 | 688 |
|
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689 send_code(code+LITERALS+1, ltree); // send the length code |
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690 extra = Tree.extra_lbits[code]; |
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691 if(extra != 0){ |
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692 lc -= Tree.base_length[code]; |
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693 send_bits(lc, extra); // send the extra length bits |
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694 } |
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695 dist--; // dist is now the match distance - 1 |
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696 code = Tree.d_code(dist); |
| 0 | 697 |
|
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698 send_code(code, dtree); // send the distance code |
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699 extra = Tree.extra_dbits[code]; |
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700 if (extra != 0) { |
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701 dist -= Tree.base_dist[code]; |
|
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702 send_bits(dist, extra); // send the extra distance bits |
|
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703 } |
|
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704 } // literal or match pair ? |
| 0 | 705 |
|
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706 // Check that the overlay between pending_buf and d_buf+l_buf is ok: |
|
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707 } |
|
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708 while (lx < last_lit); |
| 0 | 709 } |
| 710 | |
|
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711 send_code(END_BLOCK, ltree); |
|
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712 last_eob_len = ltree[END_BLOCK*2+1]; |
|
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713 } |
| 0 | 714 |
|
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715 // Set the data type to ASCII or BINARY, using a crude approximation: |
|
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716 // binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise. |
|
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717 // IN assertion: the fields freq of dyn_ltree are set and the total of all |
|
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718 // frequencies does not exceed 64K (to fit in an int on 16 bit machines). |
|
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|
719 void set_data_type(){ |
|
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720 int n = 0; |
|
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|
721 int ascii_freq = 0; |
|
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|
722 int bin_freq = 0; |
|
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723 while(n<7){ bin_freq += dyn_ltree[n*2]; n++;} |
|
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|
724 while(n<128){ ascii_freq += dyn_ltree[n*2]; n++;} |
|
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725 while(n<LITERALS){ bin_freq += dyn_ltree[n*2]; n++;} |
|
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726 data_type=(byte)(bin_freq > (ascii_freq >>> 2) ? Z_BINARY : Z_ASCII); |
|
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727 } |
| 0 | 728 |
|
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729 // Flush the bit buffer, keeping at most 7 bits in it. |
|
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730 void bi_flush(){ |
|
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731 if (bi_valid == 16) { |
|
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|
732 put_short(bi_buf); |
|
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|
733 bi_buf=0; |
|
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734 bi_valid=0; |
|
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735 } |
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736 else if (bi_valid >= 8) { |
|
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737 put_byte((byte)bi_buf); |
|
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|
738 bi_buf>>>=8; |
|
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739 bi_valid-=8; |
|
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740 } |
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741 } |
| 0 | 742 |
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743 // Flush the bit buffer and align the output on a byte boundary |
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744 void bi_windup(){ |
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745 if (bi_valid > 8) { |
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746 put_short(bi_buf); |
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747 } else if (bi_valid > 0) { |
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748 put_byte((byte)bi_buf); |
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749 } |
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750 bi_buf = 0; |
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751 bi_valid = 0; |
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752 } |
| 0 | 753 |
|
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754 // Copy a stored block, storing first the length and its |
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755 // one's complement if requested. |
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756 void copy_block(int buf, // the input data |
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757 int len, // its length |
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758 boolean header // true if block header must be written |
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759 ){ |
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760 int index=0; |
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761 bi_windup(); // align on byte boundary |
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762 last_eob_len = 8; // enough lookahead for inflate |
| 0 | 763 |
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764 if (header) { |
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765 put_short((short)len); |
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766 put_short((short)~len); |
| 0 | 767 } |
| 768 | |
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769 // while(len--!=0) { |
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770 // put_byte(window[buf+index]); |
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771 // index++; |
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772 // } |
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773 put_byte(window, buf, len); |
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774 } |
| 0 | 775 |
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776 void flush_block_only(boolean eof){ |
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777 _tr_flush_block(block_start>=0 ? block_start : -1, |
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778 strstart-block_start, |
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779 eof); |
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780 block_start=strstart; |
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781 strm.flush_pending(); |
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782 } |
| 0 | 783 |
|
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784 // Copy without compression as much as possible from the input stream, return |
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785 // the current block state. |
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786 // This function does not insert new strings in the dictionary since |
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787 // uncompressible data is probably not useful. This function is used |
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788 // only for the level=0 compression option. |
|
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789 // NOTE: this function should be optimized to avoid extra copying from |
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790 // window to pending_buf. |
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791 int deflate_stored(int flush){ |
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792 // Stored blocks are limited to 0xffff bytes, pending_buf is limited |
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793 // to pending_buf_size, and each stored block has a 5 byte header: |
| 0 | 794 |
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795 int max_block_size = 0xffff; |
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796 int max_start; |
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797 |
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798 if(max_block_size > pending_buf_size - 5) { |
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799 max_block_size = pending_buf_size - 5; |
| 0 | 800 } |
| 801 | |
|
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802 // Copy as much as possible from input to output: |
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803 while(true){ |
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804 // Fill the window as much as possible: |
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805 if(lookahead<=1){ |
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806 fill_window(); |
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807 if(lookahead==0 && flush==Z_NO_FLUSH) return NeedMore; |
|
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808 if(lookahead==0) break; // flush the current block |
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809 } |
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810 |
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811 strstart+=lookahead; |
|
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812 lookahead=0; |
| 0 | 813 |
|
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814 // Emit a stored block if pending_buf will be full: |
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815 max_start=block_start+max_block_size; |
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816 if(strstart==0|| strstart>=max_start) { |
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817 // strstart == 0 is possible when wraparound on 16-bit machine |
|
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818 lookahead = (int)(strstart-max_start); |
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819 strstart = (int)max_start; |
|
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820 |
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821 flush_block_only(false); |
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822 if(strm.avail_out==0) return NeedMore; |
|
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823 |
|
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824 } |
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825 |
|
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826 // Flush if we may have to slide, otherwise block_start may become |
|
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827 // negative and the data will be gone: |
|
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828 if(strstart-block_start >= w_size-MIN_LOOKAHEAD) { |
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829 flush_block_only(false); |
|
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830 if(strm.avail_out==0) return NeedMore; |
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831 } |
| 0 | 832 } |
| 833 | |
|
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834 flush_block_only(flush == Z_FINISH); |
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835 if(strm.avail_out==0) |
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836 return (flush == Z_FINISH) ? FinishStarted : NeedMore; |
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|
837 |
|
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838 return flush == Z_FINISH ? FinishDone : BlockDone; |
|
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839 } |
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840 |
|
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841 // Send a stored block |
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842 void _tr_stored_block(int buf, // input block |
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843 int stored_len, // length of input block |
|
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844 boolean eof // true if this is the last block for a file |
|
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845 ){ |
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846 send_bits((STORED_BLOCK<<1)+(eof?1:0), 3); // send block type |
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847 copy_block(buf, stored_len, true); // with header |
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848 } |
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849 |
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850 // Determine the best encoding for the current block: dynamic trees, static |
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851 // trees or store, and output the encoded block to the zip file. |
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852 void _tr_flush_block(int buf, // input block, or NULL if too old |
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853 int stored_len, // length of input block |
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854 boolean eof // true if this is the last block for a file |
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855 ) { |
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856 int opt_lenb, static_lenb;// opt_len and static_len in bytes |
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857 int max_blindex = 0; // index of last bit length code of non zero freq |
| 0 | 858 |
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859 // Build the Huffman trees unless a stored block is forced |
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860 if(level > 0) { |
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861 // Check if the file is ascii or binary |
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862 if(data_type == Z_UNKNOWN) set_data_type(); |
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863 |
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864 // Construct the literal and distance trees |
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865 l_desc.build_tree(this); |
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866 |
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867 d_desc.build_tree(this); |
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868 |
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869 // At this point, opt_len and static_len are the total bit lengths of |
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870 // the compressed block data, excluding the tree representations. |
| 0 | 871 |
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872 // Build the bit length tree for the above two trees, and get the index |
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873 // in bl_order of the last bit length code to send. |
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874 max_blindex=build_bl_tree(); |
| 0 | 875 |
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876 // Determine the best encoding. Compute first the block length in bytes |
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877 opt_lenb=(opt_len+3+7)>>>3; |
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878 static_lenb=(static_len+3+7)>>>3; |
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879 |
|
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880 if(static_lenb<=opt_lenb) opt_lenb=static_lenb; |
|
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881 } |
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882 else { |
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883 opt_lenb=static_lenb=stored_len+5; // force a stored block |
| 0 | 884 } |
| 885 | |
|
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886 if(stored_len+4<=opt_lenb && buf != -1){ |
|
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887 // 4: two words for the lengths |
|
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888 // The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE. |
|
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889 // Otherwise we can't have processed more than WSIZE input bytes since |
|
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890 // the last block flush, because compression would have been |
|
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891 // successful. If LIT_BUFSIZE <= WSIZE, it is never too late to |
|
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892 // transform a block into a stored block. |
|
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893 _tr_stored_block(buf, stored_len, eof); |
| 0 | 894 } |
|
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895 else if(static_lenb == opt_lenb){ |
|
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896 send_bits((STATIC_TREES<<1)+(eof?1:0), 3); |
|
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897 compress_block(StaticTree.static_ltree, StaticTree.static_dtree); |
| 0 | 898 } |
|
357
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899 else{ |
|
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900 send_bits((DYN_TREES<<1)+(eof?1:0), 3); |
|
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901 send_all_trees(l_desc.max_code+1, d_desc.max_code+1, max_blindex+1); |
|
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|
902 compress_block(dyn_ltree, dyn_dtree); |
| 0 | 903 } |
| 904 | |
|
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|
905 // The above check is made mod 2^32, for files larger than 512 MB |
|
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|
906 // and uLong implemented on 32 bits. |
|
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|
907 |
|
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|
908 init_block(); |
|
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|
909 |
|
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|
910 if(eof){ |
|
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|
911 bi_windup(); |
|
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|
912 } |
|
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|
913 } |
| 0 | 914 |
|
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|
915 // Fill the window when the lookahead becomes insufficient. |
|
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|
916 // Updates strstart and lookahead. |
|
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|
917 // |
|
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|
918 // IN assertion: lookahead < MIN_LOOKAHEAD |
|
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|
919 // OUT assertions: strstart <= window_size-MIN_LOOKAHEAD |
|
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|
920 // At least one byte has been read, or avail_in == 0; reads are |
|
46c2115ae1c8
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|
921 // performed for at least two bytes (required for the zip translate_eol |
|
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|
922 // option -- not supported here). |
|
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|
923 void fill_window(){ |
|
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|
924 int n, m; |
|
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|
925 int p; |
|
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|
926 int more; // Amount of free space at the end of the window. |
|
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|
927 |
|
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|
928 do{ |
|
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|
929 more = (window_size-lookahead-strstart); |
|
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|
930 |
|
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931 // Deal with !@#$% 64K limit: |
|
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|
932 if(more==0 && strstart==0 && lookahead==0){ |
|
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933 more = w_size; |
|
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|
934 } |
|
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|
935 else if(more==-1) { |
|
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|
936 // Very unlikely, but possible on 16 bit machine if strstart == 0 |
|
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|
937 // and lookahead == 1 (input done one byte at time) |
|
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|
938 more--; |
|
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|
939 |
|
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940 // If the window is almost full and there is insufficient lookahead, |
|
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|
941 // move the upper half to the lower one to make room in the upper half. |
|
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|
942 } |
|
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|
943 else if(strstart >= w_size+ w_size-MIN_LOOKAHEAD) { |
|
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|
944 System.arraycopy(window, w_size, window, 0, w_size); |
|
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|
945 match_start-=w_size; |
|
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|
946 strstart-=w_size; // we now have strstart >= MAX_DIST |
|
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diff
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|
947 block_start-=w_size; |
| 0 | 948 |
|
357
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|
949 // Slide the hash table (could be avoided with 32 bit values |
|
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diff
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|
950 // at the expense of memory usage). We slide even when level == 0 |
|
46c2115ae1c8
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diff
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|
951 // to keep the hash table consistent if we switch back to level > 0 |
|
46c2115ae1c8
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diff
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|
952 // later. (Using level 0 permanently is not an optimal usage of |
|
46c2115ae1c8
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diff
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|
953 // zlib, so we don't care about this pathological case.) |
|
46c2115ae1c8
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diff
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|
954 |
|
46c2115ae1c8
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diff
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|
955 n = hash_size; |
|
46c2115ae1c8
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diff
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|
956 p=n; |
|
46c2115ae1c8
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diff
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|
957 do { |
|
46c2115ae1c8
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|
958 m = (head[--p]&0xffff); |
|
46c2115ae1c8
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|
959 head[p]=(m>=w_size ? (short)(m-w_size) : 0); |
|
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|
960 } |
|
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|
961 while (--n != 0); |
|
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|
962 |
|
46c2115ae1c8
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|
963 n = w_size; |
|
46c2115ae1c8
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|
964 p = n; |
|
46c2115ae1c8
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|
965 do { |
|
46c2115ae1c8
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966 m = (prev[--p]&0xffff); |
|
46c2115ae1c8
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|
967 prev[p] = (m >= w_size ? (short)(m-w_size) : 0); |
|
46c2115ae1c8
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968 // If n is not on any hash chain, prev[n] is garbage but |
|
46c2115ae1c8
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|
969 // its value will never be used. |
|
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|
970 } |
|
46c2115ae1c8
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|
971 while (--n!=0); |
|
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|
972 more += w_size; |
|
46c2115ae1c8
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|
973 } |
|
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|
974 |
|
46c2115ae1c8
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|
975 if (strm.avail_in == 0) return; |
|
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|
976 |
|
46c2115ae1c8
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|
977 // If there was no sliding: |
|
46c2115ae1c8
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|
978 // strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 && |
|
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|
979 // more == window_size - lookahead - strstart |
|
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changeset
|
980 // => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1) |
|
46c2115ae1c8
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|
981 // => more >= window_size - 2*WSIZE + 2 |
|
46c2115ae1c8
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|
982 // In the BIG_MEM or MMAP case (not yet supported), |
|
46c2115ae1c8
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|
983 // window_size == input_size + MIN_LOOKAHEAD && |
|
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984 // strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD. |
|
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985 // Otherwise, window_size == 2*WSIZE so more >= 2. |
|
46c2115ae1c8
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|
986 // If there was sliding, more >= WSIZE. So in all cases, more >= 2. |
|
46c2115ae1c8
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|
987 |
|
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988 n = strm.read_buf(window, strstart + lookahead, more); |
|
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989 lookahead += n; |
|
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|
990 |
|
46c2115ae1c8
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|
991 // Initialize the hash value now that we have some input: |
|
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992 if(lookahead >= MIN_MATCH) { |
|
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|
993 ins_h = window[strstart]&0xff; |
|
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|
994 ins_h=(((ins_h)<<hash_shift)^(window[strstart+1]&0xff))&hash_mask; |
|
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|
995 } |
|
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|
996 // If the whole input has less than MIN_MATCH bytes, ins_h is garbage, |
|
46c2115ae1c8
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|
997 // but this is not important since only literal bytes will be emitted. |
|
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|
998 } |
|
46c2115ae1c8
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|
999 while (lookahead < MIN_LOOKAHEAD && strm.avail_in != 0); |
|
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|
1000 } |
| 0 | 1001 |
|
357
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|
1002 // Compress as much as possible from the input stream, return the current |
|
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|
1003 // block state. |
|
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|
1004 // This function does not perform lazy evaluation of matches and inserts |
|
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|
1005 // new strings in the dictionary only for unmatched strings or for short |
|
46c2115ae1c8
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|
1006 // matches. It is used only for the fast compression options. |
|
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|
1007 int deflate_fast(int flush){ |
|
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|
1008 // short hash_head = 0; // head of the hash chain |
|
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|
1009 int hash_head = 0; // head of the hash chain |
|
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1010 boolean bflush; // set if current block must be flushed |
| 0 | 1011 |
|
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|
1012 while(true){ |
|
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|
1013 // Make sure that we always have enough lookahead, except |
|
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|
1014 // at the end of the input file. We need MAX_MATCH bytes |
|
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|
1015 // for the next match, plus MIN_MATCH bytes to insert the |
|
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|
1016 // string following the next match. |
|
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|
1017 if(lookahead < MIN_LOOKAHEAD){ |
|
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|
1018 fill_window(); |
|
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|
1019 if(lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH){ |
|
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|
1020 return NeedMore; |
|
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diff
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|
1021 } |
|
46c2115ae1c8
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|
1022 if(lookahead == 0) break; // flush the current block |
|
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|
1023 } |
| 0 | 1024 |
|
357
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|
1025 // Insert the string window[strstart .. strstart+2] in the |
|
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|
1026 // dictionary, and set hash_head to the head of the hash chain: |
|
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|
1027 if(lookahead >= MIN_MATCH){ |
|
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|
1028 ins_h=(((ins_h)<<hash_shift)^(window[(strstart)+(MIN_MATCH-1)]&0xff))&hash_mask; |
| 0 | 1029 |
|
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|
1030 // prev[strstart&w_mask]=hash_head=head[ins_h]; |
|
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|
1031 hash_head=(head[ins_h]&0xffff); |
|
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|
1032 prev[strstart&w_mask]=head[ins_h]; |
|
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|
1033 head[ins_h]=(short)strstart; |
|
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|
1034 } |
|
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|
1035 |
|
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|
1036 // Find the longest match, discarding those <= prev_length. |
|
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|
1037 // At this point we have always match_length < MIN_MATCH |
| 0 | 1038 |
|
357
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|
1039 if(hash_head!=0L && |
|
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|
1040 ((strstart-hash_head)&0xffff) <= w_size-MIN_LOOKAHEAD |
|
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|
1041 ){ |
|
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|
1042 // To simplify the code, we prevent matches with the string |
|
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|
1043 // of window index 0 (in particular we have to avoid a match |
|
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|
1044 // of the string with itself at the start of the input file). |
|
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|
1045 if(strategy != Z_HUFFMAN_ONLY){ |
|
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|
1046 match_length=longest_match (hash_head); |
|
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|
1047 } |
|
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|
1048 // longest_match() sets match_start |
|
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|
1049 } |
|
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|
1050 if(match_length>=MIN_MATCH){ |
|
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|
1051 // check_match(strstart, match_start, match_length); |
|
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|
1052 |
|
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|
1053 bflush=_tr_tally(strstart-match_start, match_length-MIN_MATCH); |
|
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|
1054 |
|
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|
1055 lookahead -= match_length; |
|
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|
1056 |
|
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|
1057 // Insert new strings in the hash table only if the match length |
|
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|
1058 // is not too large. This saves time but degrades compression. |
|
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|
1059 if(match_length <= max_lazy_match && |
|
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|
1060 lookahead >= MIN_MATCH) { |
|
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|
1061 match_length--; // string at strstart already in hash table |
|
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1062 do{ |
|
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|
1063 strstart++; |
| 0 | 1064 |
|
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1065 ins_h=((ins_h<<hash_shift)^(window[(strstart)+(MIN_MATCH-1)]&0xff))&hash_mask; |
|
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1066 // prev[strstart&w_mask]=hash_head=head[ins_h]; |
|
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1067 hash_head=(head[ins_h]&0xffff); |
|
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1068 prev[strstart&w_mask]=head[ins_h]; |
|
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1069 head[ins_h]=(short)strstart; |
|
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|
1070 |
|
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1071 // strstart never exceeds WSIZE-MAX_MATCH, so there are |
|
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1072 // always MIN_MATCH bytes ahead. |
|
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1073 } |
|
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1074 while (--match_length != 0); |
|
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1075 strstart++; |
|
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1076 } |
|
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1077 else{ |
|
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1078 strstart += match_length; |
|
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1079 match_length = 0; |
|
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1080 ins_h = window[strstart]&0xff; |
| 0 | 1081 |
|
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1082 ins_h=(((ins_h)<<hash_shift)^(window[strstart+1]&0xff))&hash_mask; |
|
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1083 // If lookahead < MIN_MATCH, ins_h is garbage, but it does not |
|
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1084 // matter since it will be recomputed at next deflate call. |
|
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1085 } |
|
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1086 } |
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1087 else { |
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1088 // No match, output a literal byte |
|
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1089 |
|
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1090 bflush=_tr_tally(0, window[strstart]&0xff); |
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1091 lookahead--; |
|
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1092 strstart++; |
|
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1093 } |
|
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1094 if (bflush){ |
|
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1095 |
|
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1096 flush_block_only(false); |
|
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1097 if(strm.avail_out==0) return NeedMore; |
|
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1098 } |
| 0 | 1099 } |
| 1100 | |
|
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1101 flush_block_only(flush == Z_FINISH); |
|
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1102 if(strm.avail_out==0){ |
|
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1103 if(flush == Z_FINISH) return FinishStarted; |
|
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1104 else return NeedMore; |
|
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1105 } |
|
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|
1106 return flush==Z_FINISH ? FinishDone : BlockDone; |
|
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1107 } |
|
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|
1108 |
|
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|
1109 // Same as above, but achieves better compression. We use a lazy |
|
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|
1110 // evaluation for matches: a match is finally adopted only if there is |
|
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1111 // no better match at the next window position. |
|
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1112 int deflate_slow(int flush){ |
|
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1113 // short hash_head = 0; // head of hash chain |
|
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|
1114 int hash_head = 0; // head of hash chain |
|
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1115 boolean bflush; // set if current block must be flushed |
| 0 | 1116 |
|
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1117 // Process the input block. |
|
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|
1118 while(true){ |
|
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|
1119 // Make sure that we always have enough lookahead, except |
|
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|
1120 // at the end of the input file. We need MAX_MATCH bytes |
|
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|
1121 // for the next match, plus MIN_MATCH bytes to insert the |
|
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1122 // string following the next match. |
| 0 | 1123 |
|
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1124 if (lookahead < MIN_LOOKAHEAD) { |
|
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|
1125 fill_window(); |
|
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1126 if(lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) { |
|
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1127 return NeedMore; |
|
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|
1128 } |
|
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|
1129 if(lookahead == 0) break; // flush the current block |
|
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|
1130 } |
| 0 | 1131 |
|
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|
1132 // Insert the string window[strstart .. strstart+2] in the |
|
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|
1133 // dictionary, and set hash_head to the head of the hash chain: |
| 0 | 1134 |
|
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|
1135 if(lookahead >= MIN_MATCH) { |
|
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|
1136 ins_h=(((ins_h)<<hash_shift)^(window[(strstart)+(MIN_MATCH-1)]&0xff)) & hash_mask; |
|
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|
1137 // prev[strstart&w_mask]=hash_head=head[ins_h]; |
|
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|
1138 hash_head=(head[ins_h]&0xffff); |
|
46c2115ae1c8
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diff
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|
1139 prev[strstart&w_mask]=head[ins_h]; |
|
46c2115ae1c8
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0
diff
changeset
|
1140 head[ins_h]=(short)strstart; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1141 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1142 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1143 // Find the longest match, discarding those <= prev_length. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1144 prev_length = match_length; prev_match = match_start; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1145 match_length = MIN_MATCH-1; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1146 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1147 if (hash_head != 0 && prev_length < max_lazy_match && |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1148 ((strstart-hash_head)&0xffff) <= w_size-MIN_LOOKAHEAD |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1149 ){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1150 // To simplify the code, we prevent matches with the string |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1151 // of window index 0 (in particular we have to avoid a match |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1152 // of the string with itself at the start of the input file). |
| 0 | 1153 |
|
357
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changeset
|
1154 if(strategy != Z_HUFFMAN_ONLY) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
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changeset
|
1155 match_length = longest_match(hash_head); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1156 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1157 // longest_match() sets match_start |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1158 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1159 if (match_length <= 5 && (strategy == Z_FILTERED || |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1160 (match_length == MIN_MATCH && |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1161 strstart - match_start > 4096))) { |
| 0 | 1162 |
|
357
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update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1163 // If prev_match is also MIN_MATCH, match_start is garbage |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1164 // but we will ignore the current match anyway. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1165 match_length = MIN_MATCH-1; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1166 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1167 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1168 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1169 // If there was a match at the previous step and the current |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1170 // match is not better, output the previous match: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1171 if(prev_length >= MIN_MATCH && match_length <= prev_length) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1172 int max_insert = strstart + lookahead - MIN_MATCH; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1173 // Do not insert strings in hash table beyond this. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1174 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1175 // check_match(strstart-1, prev_match, prev_length); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1176 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1177 bflush=_tr_tally(strstart-1-prev_match, prev_length - MIN_MATCH); |
| 0 | 1178 |
|
357
46c2115ae1c8
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diff
changeset
|
1179 // Insert in hash table all strings up to the end of the match. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1180 // strstart-1 and strstart are already inserted. If there is not |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1181 // enough lookahead, the last two strings are not inserted in |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1182 // the hash table. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1183 lookahead -= prev_length-1; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1184 prev_length -= 2; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1185 do{ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1186 if(++strstart <= max_insert) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1187 ins_h=(((ins_h)<<hash_shift)^(window[(strstart)+(MIN_MATCH-1)]&0xff))&hash_mask; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1188 //prev[strstart&w_mask]=hash_head=head[ins_h]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1189 hash_head=(head[ins_h]&0xffff); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1190 prev[strstart&w_mask]=head[ins_h]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1191 head[ins_h]=(short)strstart; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1192 } |
|
46c2115ae1c8
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|
1193 } |
|
46c2115ae1c8
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changeset
|
1194 while(--prev_length != 0); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1195 match_available = 0; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1196 match_length = MIN_MATCH-1; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1197 strstart++; |
| 0 | 1198 |
|
357
46c2115ae1c8
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changeset
|
1199 if (bflush){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1200 flush_block_only(false); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1201 if(strm.avail_out==0) return NeedMore; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1202 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1203 } else if (match_available!=0) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1204 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1205 // If there was no match at the previous position, output a |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1206 // single literal. If there was a match but the current match |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1207 // is longer, truncate the previous match to a single literal. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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changeset
|
1208 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1209 bflush=_tr_tally(0, window[strstart-1]&0xff); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1210 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1211 if (bflush) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1212 flush_block_only(false); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1213 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1214 strstart++; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1215 lookahead--; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1216 if(strm.avail_out == 0) return NeedMore; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1217 } else { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1218 // There is no previous match to compare with, wait for |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1219 // the next step to decide. |
| 0 | 1220 |
|
357
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changeset
|
1221 match_available = 1; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1222 strstart++; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1223 lookahead--; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1224 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1225 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1226 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1227 if(match_available!=0) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1228 bflush=_tr_tally(0, window[strstart-1]&0xff); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1229 match_available = 0; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1230 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1231 flush_block_only(flush == Z_FINISH); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1232 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1233 if(strm.avail_out==0){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1234 if(flush == Z_FINISH) return FinishStarted; |
|
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1235 else return NeedMore; |
|
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|
1236 } |
|
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|
1237 |
|
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|
1238 return flush == Z_FINISH ? FinishDone : BlockDone; |
|
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|
1239 } |
| 0 | 1240 |
|
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|
1241 int longest_match(int cur_match){ |
|
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|
1242 int chain_length = max_chain_length; // max hash chain length |
|
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1243 int scan = strstart; // current string |
|
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|
1244 int match; // matched string |
|
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|
1245 int len; // length of current match |
|
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|
1246 int best_len = prev_length; // best match length so far |
|
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|
1247 int limit = strstart>(w_size-MIN_LOOKAHEAD) ? |
|
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|
1248 strstart-(w_size-MIN_LOOKAHEAD) : 0; |
|
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1249 int nice_match=this.nice_match; |
| 0 | 1250 |
|
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|
1251 // Stop when cur_match becomes <= limit. To simplify the code, |
|
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1252 // we prevent matches with the string of window index 0. |
| 0 | 1253 |
|
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1254 int wmask = w_mask; |
|
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1255 |
|
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1256 int strend = strstart + MAX_MATCH; |
|
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1257 byte scan_end1 = window[scan+best_len-1]; |
|
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1258 byte scan_end = window[scan+best_len]; |
| 0 | 1259 |
|
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1260 // The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16. |
|
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1261 // It is easy to get rid of this optimization if necessary. |
| 0 | 1262 |
|
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1263 // Do not waste too much time if we already have a good match: |
|
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1264 if (prev_length >= good_match) { |
|
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1265 chain_length >>= 2; |
| 0 | 1266 } |
| 1267 | |
|
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1268 // Do not look for matches beyond the end of the input. This is necessary |
|
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1269 // to make deflate deterministic. |
|
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1270 if (nice_match > lookahead) nice_match = lookahead; |
|
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1271 |
|
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1272 do { |
|
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1273 match = cur_match; |
| 0 | 1274 |
|
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1275 // Skip to next match if the match length cannot increase |
|
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1276 // or if the match length is less than 2: |
|
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1277 if (window[match+best_len] != scan_end || |
|
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1278 window[match+best_len-1] != scan_end1 || |
|
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1279 window[match] != window[scan] || |
|
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1280 window[++match] != window[scan+1]) continue; |
| 0 | 1281 |
|
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1282 // The check at best_len-1 can be removed because it will be made |
|
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1283 // again later. (This heuristic is not always a win.) |
|
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1284 // It is not necessary to compare scan[2] and match[2] since they |
|
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1285 // are always equal when the other bytes match, given that |
|
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1286 // the hash keys are equal and that HASH_BITS >= 8. |
|
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1287 scan += 2; match++; |
| 0 | 1288 |
|
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1289 // We check for insufficient lookahead only every 8th comparison; |
|
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1290 // the 256th check will be made at strstart+258. |
|
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1291 do { |
|
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1292 } while (window[++scan] == window[++match] && |
|
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1293 window[++scan] == window[++match] && |
|
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1294 window[++scan] == window[++match] && |
|
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1295 window[++scan] == window[++match] && |
|
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1296 window[++scan] == window[++match] && |
|
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1297 window[++scan] == window[++match] && |
|
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1298 window[++scan] == window[++match] && |
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1299 window[++scan] == window[++match] && |
|
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1300 scan < strend); |
| 0 | 1301 |
|
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1302 len = MAX_MATCH - (int)(strend - scan); |
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1303 scan = strend - MAX_MATCH; |
| 0 | 1304 |
|
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1305 if(len>best_len) { |
|
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1306 match_start = cur_match; |
|
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1307 best_len = len; |
|
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1308 if (len >= nice_match) break; |
|
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1309 scan_end1 = window[scan+best_len-1]; |
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1310 scan_end = window[scan+best_len]; |
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1311 } |
| 0 | 1312 |
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1313 } while ((cur_match = (prev[cur_match & wmask]&0xffff)) > limit |
|
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1314 && --chain_length != 0); |
|
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1315 |
|
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1316 if (best_len <= lookahead) return best_len; |
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1317 return lookahead; |
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1318 } |
| 0 | 1319 |
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1320 int deflateInit(int level, int bits, int memlevel){ |
|
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1321 return deflateInit(level, Z_DEFLATED, bits, memlevel, |
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1322 Z_DEFAULT_STRATEGY); |
|
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1323 } |
|
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1324 |
|
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1325 int deflateInit(int level, int bits){ |
|
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1326 return deflateInit(level, Z_DEFLATED, bits, DEF_MEM_LEVEL, |
|
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1327 Z_DEFAULT_STRATEGY); |
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1328 } |
|
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1329 int deflateInit(int level){ |
|
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1330 return deflateInit(level, MAX_WBITS); |
|
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1331 } |
|
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1332 private int deflateInit(int level, int method, int windowBits, |
|
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1333 int memLevel, int strategy){ |
|
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1334 int wrap = 1; |
|
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1335 // byte[] my_version=ZLIB_VERSION; |
| 0 | 1336 |
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1337 // |
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|
1338 // if (version == null || version[0] != my_version[0] |
|
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|
1339 // || stream_size != sizeof(z_stream)) { |
|
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|
1340 // return Z_VERSION_ERROR; |
|
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|
1341 // } |
| 0 | 1342 |
|
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|
1343 strm.msg = null; |
| 0 | 1344 |
|
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1345 if (level == Z_DEFAULT_COMPRESSION) level = 6; |
| 0 | 1346 |
|
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|
1347 if (windowBits < 0) { // undocumented feature: suppress zlib header |
|
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|
1348 wrap = 0; |
|
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|
1349 windowBits = -windowBits; |
|
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|
1350 } |
|
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|
1351 else if(windowBits > 15){ |
|
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|
1352 wrap = 2; |
|
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|
1353 windowBits -= 16; |
|
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|
1354 strm.adler=new CRC32(); |
|
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|
1355 } |
| 0 | 1356 |
|
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|
1357 if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || |
|
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|
1358 method != Z_DEFLATED || |
|
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|
1359 windowBits < 9 || windowBits > 15 || level < 0 || level > 9 || |
|
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|
1360 strategy < 0 || strategy > Z_HUFFMAN_ONLY) { |
|
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|
1361 return Z_STREAM_ERROR; |
| 0 | 1362 } |
| 1363 | |
|
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1364 strm.dstate = (Deflate)this; |
|
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|
1365 |
|
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|
1366 this.wrap = wrap; |
|
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|
1367 w_bits = windowBits; |
|
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1368 w_size = 1 << w_bits; |
|
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|
1369 w_mask = w_size - 1; |
|
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|
1370 |
|
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|
1371 hash_bits = memLevel + 7; |
|
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1372 hash_size = 1 << hash_bits; |
|
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1373 hash_mask = hash_size - 1; |
|
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1374 hash_shift = ((hash_bits+MIN_MATCH-1)/MIN_MATCH); |
|
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|
1375 |
|
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|
1376 window = new byte[w_size*2]; |
|
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1377 prev = new short[w_size]; |
|
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1378 head = new short[hash_size]; |
|
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|
1379 |
|
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|
1380 lit_bufsize = 1 << (memLevel + 6); // 16K elements by default |
|
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|
1381 |
|
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|
1382 // We overlay pending_buf and d_buf+l_buf. This works since the average |
|
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|
1383 // output size for (length,distance) codes is <= 24 bits. |
|
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|
1384 pending_buf = new byte[lit_bufsize*3]; |
|
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|
1385 pending_buf_size = lit_bufsize*3; |
|
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|
1386 |
|
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|
1387 d_buf = lit_bufsize; |
|
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|
1388 l_buf = new byte[lit_bufsize]; |
|
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|
1389 |
|
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|
1390 this.level = level; |
|
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|
1391 |
|
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|
1392 this.strategy = strategy; |
|
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|
1393 this.method = (byte)method; |
|
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|
1394 |
|
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|
1395 return deflateReset(); |
|
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1396 } |
| 0 | 1397 |
|
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|
1398 int deflateReset(){ |
|
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|
1399 strm.total_in = strm.total_out = 0; |
|
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|
1400 strm.msg = null; // |
|
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|
1401 strm.data_type = Z_UNKNOWN; |
|
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|
1402 |
|
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|
1403 pending = 0; |
|
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|
1404 pending_out = 0; |
|
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|
1405 |
|
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|
1406 if(wrap < 0){ |
|
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|
1407 wrap = -wrap; |
|
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|
1408 } |
|
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|
1409 status = (wrap==0) ? BUSY_STATE : INIT_STATE; |
|
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|
1410 strm.adler.reset(); |
|
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|
1411 |
|
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|
1412 last_flush = Z_NO_FLUSH; |
| 0 | 1413 |
|
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|
1414 tr_init(); |
|
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|
1415 lm_init(); |
|
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|
1416 return Z_OK; |
|
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1417 } |
| 0 | 1418 |
|
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|
1419 int deflateEnd(){ |
|
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|
1420 if(status!=INIT_STATE && status!=BUSY_STATE && status!=FINISH_STATE){ |
|
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|
1421 return Z_STREAM_ERROR; |
|
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|
1422 } |
|
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|
1423 // Deallocate in reverse order of allocations: |
|
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|
1424 pending_buf=null; |
|
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|
1425 l_buf=null; |
|
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|
1426 head=null; |
|
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|
1427 prev=null; |
|
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|
1428 window=null; |
|
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|
1429 // free |
|
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|
1430 // dstate=null; |
|
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|
1431 return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK; |
|
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|
1432 } |
|
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|
1433 |
|
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|
1434 int deflateParams(int _level, int _strategy){ |
|
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|
1435 int err=Z_OK; |
| 0 | 1436 |
|
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|
1437 if(_level == Z_DEFAULT_COMPRESSION){ |
|
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|
1438 _level = 6; |
|
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|
1439 } |
|
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|
1440 if(_level < 0 || _level > 9 || |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1441 _strategy < 0 || _strategy > Z_HUFFMAN_ONLY) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1442 return Z_STREAM_ERROR; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1443 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1444 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1445 if(config_table[level].func!=config_table[_level].func && |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1446 strm.total_in != 0) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1447 // Flush the last buffer: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1448 err = strm.deflate(Z_PARTIAL_FLUSH); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1449 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1450 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1451 if(level != _level) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1452 level = _level; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1453 max_lazy_match = config_table[level].max_lazy; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1454 good_match = config_table[level].good_length; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1455 nice_match = config_table[level].nice_length; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1456 max_chain_length = config_table[level].max_chain; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
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|
1457 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1458 strategy = _strategy; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1459 return err; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
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|
1460 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
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|
1461 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1462 int deflateSetDictionary (byte[] dictionary, int dictLength){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1463 int length = dictLength; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
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|
1464 int index=0; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
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|
1465 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1466 if(dictionary == null || status != INIT_STATE) |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
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|
1467 return Z_STREAM_ERROR; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
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|
1468 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
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|
1469 strm.adler.update(dictionary, 0, dictLength); |
| 0 | 1470 |
|
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1471 if(length < MIN_MATCH) return Z_OK; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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parents:
0
diff
changeset
|
1472 if(length > w_size-MIN_LOOKAHEAD){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1473 length = w_size-MIN_LOOKAHEAD; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1474 index=dictLength-length; // use the tail of the dictionary |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1475 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1476 System.arraycopy(dictionary, index, window, 0, length); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1477 strstart = length; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1478 block_start = length; |
| 0 | 1479 |
|
357
46c2115ae1c8
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0
diff
changeset
|
1480 // Insert all strings in the hash table (except for the last two bytes). |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1481 // s->lookahead stays null, so s->ins_h will be recomputed at the next |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1482 // call of fill_window. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
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|
1483 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1484 ins_h = window[0]&0xff; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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|
1485 ins_h=(((ins_h)<<hash_shift)^(window[1]&0xff))&hash_mask; |
| 0 | 1486 |
|
357
46c2115ae1c8
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diff
changeset
|
1487 for(int n=0; n<=length-MIN_MATCH; n++){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1488 ins_h=(((ins_h)<<hash_shift)^(window[(n)+(MIN_MATCH-1)]&0xff))&hash_mask; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1489 prev[n&w_mask]=head[ins_h]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1490 head[ins_h]=(short)n; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1491 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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changeset
|
1492 return Z_OK; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1493 } |
| 0 | 1494 |
|
357
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changeset
|
1495 int deflate(int flush){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1496 int old_flush; |
| 0 | 1497 |
|
357
46c2115ae1c8
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diff
changeset
|
1498 if(flush>Z_FINISH || flush<0){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1499 return Z_STREAM_ERROR; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1500 } |
| 0 | 1501 |
|
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1502 if(strm.next_out == null || |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1503 (strm.next_in == null && strm.avail_in != 0) || |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1504 (status == FINISH_STATE && flush != Z_FINISH)) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1505 strm.msg=z_errmsg[Z_NEED_DICT-(Z_STREAM_ERROR)]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1506 return Z_STREAM_ERROR; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1507 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1508 if(strm.avail_out == 0){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1509 strm.msg=z_errmsg[Z_NEED_DICT-(Z_BUF_ERROR)]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1510 return Z_BUF_ERROR; |
| 0 | 1511 } |
| 1512 | |
|
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1513 old_flush = last_flush; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1514 last_flush = flush; |
| 0 | 1515 |
|
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1516 // Write the zlib header |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1517 if(status == INIT_STATE) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1518 if(wrap == 2){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1519 getGZIPHeader().put(this); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1520 status=BUSY_STATE; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1521 strm.adler.reset(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1522 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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parents:
0
diff
changeset
|
1523 else{ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1524 int header = (Z_DEFLATED+((w_bits-8)<<4))<<8; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1525 int level_flags=((level-1)&0xff)>>1; |
| 0 | 1526 |
|
357
46c2115ae1c8
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diff
changeset
|
1527 if(level_flags>3) level_flags=3; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1528 header |= (level_flags<<6); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1529 if(strstart!=0) header |= PRESET_DICT; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1530 header+=31-(header % 31); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1531 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1532 status=BUSY_STATE; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1533 putShortMSB(header); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1534 |
| 0 | 1535 |
|
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1536 // Save the adler32 of the preset dictionary: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1537 if(strstart!=0){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1538 long adler=strm.adler.getValue(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1539 putShortMSB((int)(adler>>>16)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1540 putShortMSB((int)(adler&0xffff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1541 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1542 strm.adler.reset(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1543 } |
| 0 | 1544 } |
| 1545 | |
|
357
46c2115ae1c8
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0
diff
changeset
|
1546 // Flush as much pending output as possible |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1547 if(pending != 0) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1548 strm.flush_pending(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1549 if(strm.avail_out == 0) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1550 // Since avail_out is 0, deflate will be called again with |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1551 // more output space, but possibly with both pending and |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1552 // avail_in equal to zero. There won't be anything to do, |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1553 // but this is not an error situation so make sure we |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1554 // return OK instead of BUF_ERROR at next call of deflate: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1555 last_flush = -1; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1556 return Z_OK; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1557 } |
| 0 | 1558 |
|
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1559 // Make sure there is something to do and avoid duplicate consecutive |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
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diff
changeset
|
1560 // flushes. For repeated and useless calls with Z_FINISH, we keep |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1561 // returning Z_STREAM_END instead of Z_BUFF_ERROR. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1562 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1563 else if(strm.avail_in==0 && flush <= old_flush && |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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0
diff
changeset
|
1564 flush != Z_FINISH) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1565 strm.msg=z_errmsg[Z_NEED_DICT-(Z_BUF_ERROR)]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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|
1566 return Z_BUF_ERROR; |
| 0 | 1567 } |
| 1568 | |
|
357
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changeset
|
1569 // User must not provide more input after the first FINISH: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1570 if(status == FINISH_STATE && strm.avail_in != 0) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1571 strm.msg=z_errmsg[Z_NEED_DICT-(Z_BUF_ERROR)]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1572 return Z_BUF_ERROR; |
| 0 | 1573 } |
| 1574 | |
|
357
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changeset
|
1575 // Start a new block or continue the current one. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1576 if(strm.avail_in!=0 || lookahead!=0 || |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1577 (flush != Z_NO_FLUSH && status != FINISH_STATE)) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1578 int bstate=-1; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1579 switch(config_table[level].func){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1580 case STORED: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1581 bstate = deflate_stored(flush); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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changeset
|
1582 break; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1583 case FAST: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1584 bstate = deflate_fast(flush); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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changeset
|
1585 break; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1586 case SLOW: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1587 bstate = deflate_slow(flush); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1588 break; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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changeset
|
1589 default: |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1590 } |
| 0 | 1591 |
|
357
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update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1592 if (bstate==FinishStarted || bstate==FinishDone) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1593 status = FINISH_STATE; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1594 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1595 if (bstate==NeedMore || bstate==FinishStarted) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1596 if(strm.avail_out == 0) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1597 last_flush = -1; // avoid BUF_ERROR next call, see above |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1598 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1599 return Z_OK; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1600 // If flush != Z_NO_FLUSH && avail_out == 0, the next call |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1601 // of deflate should use the same flush parameter to make sure |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1602 // that the flush is complete. So we don't have to output an |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1603 // empty block here, this will be done at next call. This also |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1604 // ensures that for a very small output buffer, we emit at most |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1605 // one empty block. |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1606 } |
| 0 | 1607 |
|
357
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changeset
|
1608 if (bstate==BlockDone) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1609 if(flush == Z_PARTIAL_FLUSH) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1610 _tr_align(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1611 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1612 else { // FULL_FLUSH or SYNC_FLUSH |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1613 _tr_stored_block(0, 0, false); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1614 // For a full flush, this empty block will be recognized |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1615 // as a special marker by inflate_sync(). |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1616 if(flush == Z_FULL_FLUSH) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1617 //state.head[s.hash_size-1]=0; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1618 for(int i=0; i<hash_size/*-1*/; i++) // forget history |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1619 head[i]=0; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1620 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1621 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1622 strm.flush_pending(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1623 if(strm.avail_out == 0) { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1624 last_flush = -1; // avoid BUF_ERROR at next call, see above |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1625 return Z_OK; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1626 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1627 } |
| 0 | 1628 } |
| 1629 | |
|
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1630 if(flush!=Z_FINISH) return Z_OK; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1631 if(wrap<=0) return Z_STREAM_END; |
| 0 | 1632 |
|
357
46c2115ae1c8
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diff
changeset
|
1633 if(wrap==2){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1634 long adler=strm.adler.getValue(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
1635 put_byte((byte)(adler&0xff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1636 put_byte((byte)((adler>>8)&0xff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1637 put_byte((byte)((adler>>16)&0xff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1638 put_byte((byte)((adler>>24)&0xff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1639 put_byte((byte)(strm.total_in&0xff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
1640 put_byte((byte)((strm.total_in>>8)&0xff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1641 put_byte((byte)((strm.total_in>>16)&0xff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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0
diff
changeset
|
1642 put_byte((byte)((strm.total_in>>24)&0xff)); |
| 0 | 1643 |
|
357
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|
1644 getGZIPHeader().setCRC(adler); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1645 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1646 else{ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1647 // Write the zlib trailer (adler32) |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1648 long adler=strm.adler.getValue(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
changeset
|
1649 putShortMSB((int)(adler>>>16)); |
|
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update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1650 putShortMSB((int)(adler&0xffff)); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1651 } |
| 0 | 1652 |
|
357
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|
1653 strm.flush_pending(); |
| 0 | 1654 |
|
357
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|
1655 // If avail_out is zero, the application will call deflate again |
|
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|
1656 // to flush the rest. |
| 0 | 1657 |
|
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|
1658 if(wrap > 0) wrap = -wrap; // write the trailer only once! |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1659 return pending != 0 ? Z_OK : Z_STREAM_END; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1660 } |
| 0 | 1661 |
|
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|
1662 static int deflateCopy(ZStream dest, ZStream src){ |
| 0 | 1663 |
|
357
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|
1664 if(src.dstate == null){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1665 return Z_STREAM_ERROR; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1666 } |
| 0 | 1667 |
|
357
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|
1668 if(src.next_in!=null){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1669 dest.next_in = new byte[src.next_in.length]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1670 System.arraycopy(src.next_in, 0, dest.next_in, 0, src.next_in.length); |
|
46c2115ae1c8
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|
1671 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1672 dest.next_in_index = src.next_in_index; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1673 dest.avail_in = src.avail_in; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1674 dest.total_in = src.total_in; |
| 0 | 1675 |
|
357
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|
1676 if(src.next_out!=null){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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changeset
|
1677 dest.next_out = new byte[src.next_out.length]; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1678 System.arraycopy(src.next_out, 0, dest.next_out ,0 , src.next_out.length); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1679 } |
| 0 | 1680 |
|
357
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|
1681 dest.next_out_index = src.next_out_index; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1682 dest.avail_out = src.avail_out; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1683 dest.total_out = src.total_out; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1684 |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1685 dest.msg = src.msg; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
1686 dest.data_type = src.data_type; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1687 dest.adler = src.adler.copy(); |
| 0 | 1688 |
|
357
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|
1689 try{ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1690 dest.dstate = (Deflate)src.dstate.clone(); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1691 dest.dstate.strm = dest; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1692 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1693 catch(CloneNotSupportedException e){ |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1694 // |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1695 } |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1696 return Z_OK; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1697 } |
| 0 | 1698 |
|
357
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update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1699 public Object clone() throws CloneNotSupportedException { |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1700 Deflate dest = (Deflate)super.clone(); |
| 0 | 1701 |
|
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|
1702 dest.pending_buf = dup(dest.pending_buf); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1703 dest.d_buf = dest.d_buf; |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1704 dest.l_buf = dup(dest.l_buf); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1705 dest.window = dup(dest.window); |
| 0 | 1706 |
|
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|
1707 dest.prev = dup(dest.prev); |
|
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update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1708 dest.head = dup(dest.head); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1709 dest.dyn_ltree = dup(dest.dyn_ltree); |
|
46c2115ae1c8
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|
1710 dest.dyn_dtree = dup(dest.dyn_dtree); |
|
46c2115ae1c8
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|
1711 dest.bl_tree = dup(dest.bl_tree); |
| 0 | 1712 |
|
357
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|
1713 dest.bl_count = dup(dest.bl_count); |
|
46c2115ae1c8
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|
1714 dest.next_code = dup(dest.next_code); |
|
46c2115ae1c8
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|
1715 dest.heap = dup(dest.heap); |
|
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
1716 dest.depth = dup(dest.depth); |
|
46c2115ae1c8
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|
1717 |
|
46c2115ae1c8
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|
1718 dest.l_desc.dyn_tree = dest.dyn_ltree; |
|
46c2115ae1c8
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|
1719 dest.d_desc.dyn_tree = dest.dyn_dtree; |
|
46c2115ae1c8
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|
1720 dest.bl_desc.dyn_tree = dest.bl_tree; |
| 0 | 1721 |
|
357
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|
1722 /* |
|
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|
1723 dest.l_desc.stat_desc = StaticTree.static_l_desc; |
|
46c2115ae1c8
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|
1724 dest.d_desc.stat_desc = StaticTree.static_d_desc; |
|
46c2115ae1c8
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|
1725 dest.bl_desc.stat_desc = StaticTree.static_bl_desc; |
|
46c2115ae1c8
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|
1726 */ |
| 0 | 1727 |
|
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|
1728 if(dest.gheader!=null){ |
|
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|
1729 dest.gheader = (GZIPHeader)dest.gheader.clone(); |
|
46c2115ae1c8
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|
1730 } |
| 0 | 1731 |
|
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|
1732 return dest; |
|
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|
1733 } |
| 0 | 1734 |
|
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|
1735 private byte[] dup(byte[] buf){ |
|
46c2115ae1c8
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|
1736 byte[] foo = new byte[buf.length]; |
|
46c2115ae1c8
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|
1737 System.arraycopy(buf, 0, foo, 0, foo.length); |
|
46c2115ae1c8
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|
1738 return foo; |
|
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|
1739 } |
|
46c2115ae1c8
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|
1740 private short[] dup(short[] buf){ |
|
46c2115ae1c8
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|
1741 short[] foo = new short[buf.length]; |
|
46c2115ae1c8
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|
1742 System.arraycopy(buf, 0, foo, 0, foo.length); |
|
46c2115ae1c8
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|
1743 return foo; |
|
46c2115ae1c8
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|
1744 } |
|
46c2115ae1c8
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|
1745 private int[] dup(int[] buf){ |
|
46c2115ae1c8
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|
1746 int[] foo = new int[buf.length]; |
|
46c2115ae1c8
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|
1747 System.arraycopy(buf, 0, foo, 0, foo.length); |
|
46c2115ae1c8
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|
1748 return foo; |
|
46c2115ae1c8
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|
1749 } |
| 0 | 1750 |
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46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
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1751 synchronized GZIPHeader getGZIPHeader(){ |
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46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
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1752 if(gheader==null){ |
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46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
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1753 gheader = new GZIPHeader(); |
| 0 | 1754 } |
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46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
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1755 return gheader; |
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46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
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1756 } |
| 0 | 1757 } |