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annotate src/com/jcraft/jzlib/InfBlocks.java @ 416:07c1da90deab
avoid null pointer
author | Carl Byington <carl@five-ten-sg.com> |
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date | Mon, 27 Oct 2014 13:58:42 -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) 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 final class InfBlocks{ |
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38 static final private int MANY=1440; |
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39 |
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40 // And'ing with mask[n] masks the lower n bits |
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41 static final private int[] inflate_mask = { |
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42 0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000f, |
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43 0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff, 0x000001ff, |
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44 0x000003ff, 0x000007ff, 0x00000fff, 0x00001fff, 0x00003fff, |
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45 0x00007fff, 0x0000ffff |
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46 }; |
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47 |
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48 // Table for deflate from PKZIP's appnote.txt. |
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49 static final int[] border = { // Order of the bit length code lengths |
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50 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 |
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51 }; |
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52 |
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53 static final private int Z_OK=0; |
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54 static final private int Z_STREAM_END=1; |
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55 static final private int Z_NEED_DICT=2; |
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56 static final private int Z_ERRNO=-1; |
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57 static final private int Z_STREAM_ERROR=-2; |
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58 static final private int Z_DATA_ERROR=-3; |
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59 static final private int Z_MEM_ERROR=-4; |
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60 static final private int Z_BUF_ERROR=-5; |
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61 static final private int Z_VERSION_ERROR=-6; |
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62 |
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63 static final private int TYPE=0; // get type bits (3, including end bit) |
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64 static final private int LENS=1; // get lengths for stored |
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65 static final private int STORED=2;// processing stored block |
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66 static final private int TABLE=3; // get table lengths |
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67 static final private int BTREE=4; // get bit lengths tree for a dynamic block |
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68 static final private int DTREE=5; // get length, distance trees for a dynamic block |
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69 static final private int CODES=6; // processing fixed or dynamic block |
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70 static final private int DRY=7; // output remaining window bytes |
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71 static final private int DONE=8; // finished last block, done |
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72 static final private int BAD=9; // ot a data error--stuck here |
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73 |
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74 int mode; // current inflate_block mode |
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75 |
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76 int left; // if STORED, bytes left to copy |
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77 |
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78 int table; // table lengths (14 bits) |
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79 int index; // index into blens (or border) |
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80 int[] blens; // bit lengths of codes |
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81 int[] bb=new int[1]; // bit length tree depth |
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82 int[] tb=new int[1]; // bit length decoding tree |
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83 |
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84 int[] bl=new int[1]; |
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85 int[] bd=new int[1]; |
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86 |
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87 int[][] tl=new int[1][]; |
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88 int[][] td=new int[1][]; |
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89 int[] tli=new int[1]; // tl_index |
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90 int[] tdi=new int[1]; // td_index |
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91 |
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92 private final InfCodes codes; // if CODES, current state |
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94 int last; // true if this block is the last block |
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95 |
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96 // mode independent information |
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97 int bitk; // bits in bit buffer |
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98 int bitb; // bit buffer |
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99 int[] hufts; // single malloc for tree space |
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100 byte[] window; // sliding window |
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101 int end; // one byte after sliding window |
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102 int read; // window read pointer |
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103 int write; // window write pointer |
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104 private boolean check; |
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105 |
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106 private final InfTree inftree=new InfTree(); |
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107 |
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108 private final ZStream z; |
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109 |
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110 InfBlocks(ZStream z, int w){ |
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111 this.z=z; |
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112 this.codes=new InfCodes(this.z, this); |
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113 hufts=new int[MANY*3]; |
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114 window=new byte[w]; |
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115 end=w; |
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116 this.check = (z.istate.wrap==0) ? false : true; |
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117 mode = TYPE; |
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118 reset(); |
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119 } |
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121 void reset(){ |
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122 if(mode==BTREE || mode==DTREE){ |
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123 } |
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124 if(mode==CODES){ |
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125 codes.free(z); |
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126 } |
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127 mode=TYPE; |
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128 bitk=0; |
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129 bitb=0; |
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130 read=write=0; |
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131 if(check){ |
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132 z.adler.reset(); |
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133 } |
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134 } |
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135 |
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136 int proc(int r){ |
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137 int t; // temporary storage |
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138 int b; // bit buffer |
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139 int k; // bits in bit buffer |
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140 int p; // input data pointer |
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141 int n; // bytes available there |
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142 int q; // output window write pointer |
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143 int m; // bytes to end of window or read pointer |
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144 |
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145 // copy input/output information to locals (UPDATE macro restores) |
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146 {p=z.next_in_index;n=z.avail_in;b=bitb;k=bitk;} |
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147 {q=write;m=(int)(q<read?read-q-1:end-q);} |
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148 |
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149 // process input based on current state |
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150 while(true){ |
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151 switch (mode){ |
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152 case TYPE: |
0 | 153 |
357
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154 while(k<(3)){ |
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155 if(n!=0){ |
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156 r=Z_OK; |
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157 } |
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158 else{ |
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159 bitb=b; bitk=k; |
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160 z.avail_in=n; |
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161 z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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162 write=q; |
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163 return inflate_flush(r); |
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164 }; |
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165 n--; |
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166 b|=(z.next_in[p++]&0xff)<<k; |
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167 k+=8; |
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168 } |
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169 t = (int)(b & 7); |
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170 last = t & 1; |
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171 |
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172 switch (t >>> 1){ |
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173 case 0: // stored |
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174 {b>>>=(3);k-=(3);} |
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175 t = k & 7; // go to byte boundary |
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176 |
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177 {b>>>=(t);k-=(t);} |
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178 mode = LENS; // get length of stored block |
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179 break; |
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180 case 1: // fixed |
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181 InfTree.inflate_trees_fixed(bl, bd, tl, td, z); |
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182 codes.init(bl[0], bd[0], tl[0], 0, td[0], 0); |
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183 |
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184 {b>>>=(3);k-=(3);} |
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185 |
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186 mode = CODES; |
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187 break; |
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188 case 2: // dynamic |
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189 |
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190 {b>>>=(3);k-=(3);} |
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191 |
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192 mode = TABLE; |
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193 break; |
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194 case 3: // illegal |
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195 |
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196 {b>>>=(3);k-=(3);} |
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197 mode = BAD; |
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198 z.msg = "invalid block type"; |
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199 r = Z_DATA_ERROR; |
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200 |
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201 bitb=b; bitk=k; |
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202 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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203 write=q; |
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204 return inflate_flush(r); |
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205 } |
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206 break; |
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207 case LENS: |
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208 |
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209 while(k<(32)){ |
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210 if(n!=0){ |
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211 r=Z_OK; |
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212 } |
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213 else{ |
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214 bitb=b; bitk=k; |
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215 z.avail_in=n; |
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216 z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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217 write=q; |
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218 return inflate_flush(r); |
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219 }; |
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220 n--; |
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221 b|=(z.next_in[p++]&0xff)<<k; |
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222 k+=8; |
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223 } |
0 | 224 |
357
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225 if ((((~b) >>> 16) & 0xffff) != (b & 0xffff)){ |
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226 mode = BAD; |
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227 z.msg = "invalid stored block lengths"; |
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228 r = Z_DATA_ERROR; |
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229 |
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230 bitb=b; bitk=k; |
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231 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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232 write=q; |
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233 return inflate_flush(r); |
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234 } |
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235 left = (b & 0xffff); |
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236 b = k = 0; // dump bits |
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237 mode = left!=0 ? STORED : (last!=0 ? DRY : TYPE); |
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238 break; |
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239 case STORED: |
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240 if (n == 0){ |
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241 bitb=b; bitk=k; |
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242 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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243 write=q; |
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244 return inflate_flush(r); |
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245 } |
0 | 246 |
357
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247 if(m==0){ |
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248 if(q==end&&read!=0){ |
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249 q=0; m=(int)(q<read?read-q-1:end-q); |
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250 } |
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251 if(m==0){ |
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252 write=q; |
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253 r=inflate_flush(r); |
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254 q=write;m=(int)(q<read?read-q-1:end-q); |
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255 if(q==end&&read!=0){ |
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256 q=0; m=(int)(q<read?read-q-1:end-q); |
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257 } |
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258 if(m==0){ |
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259 bitb=b; bitk=k; |
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260 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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261 write=q; |
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262 return inflate_flush(r); |
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263 } |
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264 } |
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265 } |
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266 r=Z_OK; |
0 | 267 |
357
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268 t = left; |
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269 if(t>n) t = n; |
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270 if(t>m) t = m; |
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271 System.arraycopy(z.next_in, p, window, q, t); |
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272 p += t; n -= t; |
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273 q += t; m -= t; |
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274 if ((left -= t) != 0) |
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275 break; |
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276 mode = last!=0 ? DRY : TYPE; |
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277 break; |
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278 case TABLE: |
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279 |
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280 while(k<(14)){ |
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281 if(n!=0){ |
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282 r=Z_OK; |
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283 } |
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284 else{ |
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285 bitb=b; bitk=k; |
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286 z.avail_in=n; |
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287 z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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288 write=q; |
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289 return inflate_flush(r); |
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290 }; |
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291 n--; |
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292 b|=(z.next_in[p++]&0xff)<<k; |
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293 k+=8; |
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294 } |
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295 |
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296 table = t = (b & 0x3fff); |
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297 if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29) |
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298 { |
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299 mode = BAD; |
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300 z.msg = "too many length or distance symbols"; |
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301 r = Z_DATA_ERROR; |
0 | 302 |
357
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303 bitb=b; bitk=k; |
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304 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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305 write=q; |
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306 return inflate_flush(r); |
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|
307 } |
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|
308 t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f); |
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309 if(blens==null || blens.length<t){ |
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|
310 blens=new int[t]; |
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|
311 } |
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|
312 else{ |
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|
313 for(int i=0; i<t; i++){blens[i]=0;} |
46c2115ae1c8
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|
314 } |
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|
315 |
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|
316 {b>>>=(14);k-=(14);} |
0 | 317 |
357
46c2115ae1c8
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|
318 index = 0; |
46c2115ae1c8
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319 mode = BTREE; |
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|
320 case BTREE: |
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|
321 while (index < 4 + (table >>> 10)){ |
46c2115ae1c8
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|
322 while(k<(3)){ |
46c2115ae1c8
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|
323 if(n!=0){ |
46c2115ae1c8
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|
324 r=Z_OK; |
46c2115ae1c8
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|
325 } |
46c2115ae1c8
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|
326 else{ |
46c2115ae1c8
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|
327 bitb=b; bitk=k; |
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|
328 z.avail_in=n; |
46c2115ae1c8
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|
329 z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
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|
330 write=q; |
46c2115ae1c8
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|
331 return inflate_flush(r); |
46c2115ae1c8
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|
332 }; |
46c2115ae1c8
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|
333 n--; |
46c2115ae1c8
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diff
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|
334 b|=(z.next_in[p++]&0xff)<<k; |
46c2115ae1c8
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diff
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|
335 k+=8; |
46c2115ae1c8
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|
336 } |
46c2115ae1c8
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|
337 |
46c2115ae1c8
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|
338 blens[border[index++]] = b&7; |
0 | 339 |
357
46c2115ae1c8
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|
340 {b>>>=(3);k-=(3);} |
46c2115ae1c8
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diff
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|
341 } |
46c2115ae1c8
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diff
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|
342 |
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
343 while(index < 19){ |
46c2115ae1c8
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diff
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|
344 blens[border[index++]] = 0; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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diff
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|
345 } |
46c2115ae1c8
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|
346 |
46c2115ae1c8
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|
347 bb[0] = 7; |
46c2115ae1c8
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348 t = inftree.inflate_trees_bits(blens, bb, tb, hufts, z); |
46c2115ae1c8
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349 if (t != Z_OK){ |
46c2115ae1c8
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diff
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|
350 r = t; |
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|
351 if (r == Z_DATA_ERROR){ |
46c2115ae1c8
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352 blens=null; |
46c2115ae1c8
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353 mode = BAD; |
46c2115ae1c8
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|
354 } |
46c2115ae1c8
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diff
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|
355 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
356 bitb=b; bitk=k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
357 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
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|
358 write=q; |
46c2115ae1c8
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diff
changeset
|
359 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
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diff
changeset
|
360 } |
0 | 361 |
357
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
362 index = 0; |
46c2115ae1c8
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diff
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|
363 mode = DTREE; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
364 case DTREE: |
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
parents:
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diff
changeset
|
365 while (true){ |
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
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diff
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|
366 t = table; |
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
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0
diff
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|
367 if(!(index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
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diff
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|
368 break; |
46c2115ae1c8
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diff
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|
369 } |
46c2115ae1c8
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|
370 |
46c2115ae1c8
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diff
changeset
|
371 int[] h; |
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
372 int i, j, c; |
46c2115ae1c8
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|
373 |
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
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diff
changeset
|
374 t = bb[0]; |
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
parents:
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diff
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|
375 |
46c2115ae1c8
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diff
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|
376 while(k<(t)){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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|
377 if(n!=0){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
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parents:
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diff
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|
378 r=Z_OK; |
46c2115ae1c8
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parents:
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diff
changeset
|
379 } |
46c2115ae1c8
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parents:
0
diff
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|
380 else{ |
46c2115ae1c8
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Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
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|
381 bitb=b; bitk=k; |
46c2115ae1c8
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parents:
0
diff
changeset
|
382 z.avail_in=n; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
383 z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
384 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
385 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
386 }; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
387 n--; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
388 b|=(z.next_in[p++]&0xff)<<k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
389 k+=8; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
390 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
391 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
392 if(tb[0]==-1){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
393 //System.err.println("null..."); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
394 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
395 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
396 t=hufts[(tb[0]+(b&inflate_mask[t]))*3+1]; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
397 c=hufts[(tb[0]+(b&inflate_mask[t]))*3+2]; |
0 | 398 |
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
399 if (c < 16){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
400 b>>>=(t);k-=(t); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
401 blens[index++] = c; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
402 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
403 else { // c == 16..18 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
404 i = c == 18 ? 7 : c - 14; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
405 j = c == 18 ? 11 : 3; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
406 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
407 while(k<(t+i)){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
408 if(n!=0){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
409 r=Z_OK; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
410 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
411 else{ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
412 bitb=b; bitk=k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
413 z.avail_in=n; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
414 z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
415 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
416 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
417 }; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
418 n--; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
419 b|=(z.next_in[p++]&0xff)<<k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
420 k+=8; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
421 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
422 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
423 b>>>=(t);k-=(t); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
424 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
425 j += (b & inflate_mask[i]); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
426 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
427 b>>>=(i);k-=(i); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
428 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
429 i = index; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
430 t = table; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
431 if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) || |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
432 (c == 16 && i < 1)){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
433 blens=null; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
434 mode = BAD; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
435 z.msg = "invalid bit length repeat"; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
436 r = Z_DATA_ERROR; |
0 | 437 |
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
438 bitb=b; bitk=k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
439 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
440 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
441 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
442 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
443 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
444 c = c == 16 ? blens[i-1] : 0; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
445 do{ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
446 blens[i++] = c; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
447 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
448 while (--j!=0); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
449 index = i; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
450 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
451 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
452 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
453 tb[0]=-1; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
454 { |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
455 bl[0] = 9; // must be <= 9 for lookahead assumptions |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
456 bd[0] = 6; // must be <= 9 for lookahead assumptions |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
457 t = table; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
458 t = inftree.inflate_trees_dynamic(257 + (t & 0x1f), |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
459 1 + ((t >> 5) & 0x1f), |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
460 blens, bl, bd, tli, tdi, hufts, z); |
0 | 461 |
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
462 if (t != Z_OK){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
463 if (t == Z_DATA_ERROR){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
464 blens=null; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
465 mode = BAD; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
466 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
467 r = t; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
468 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
469 bitb=b; bitk=k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
470 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
471 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
472 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
473 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
474 codes.init(bl[0], bd[0], hufts, tli[0], hufts, tdi[0]); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
475 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
476 mode = CODES; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
477 case CODES: |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
478 bitb=b; bitk=k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
479 z.avail_in=n; z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
480 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
481 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
482 if ((r = codes.proc(r)) != Z_STREAM_END){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
483 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
484 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
485 r = Z_OK; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
486 codes.free(z); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
487 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
488 p=z.next_in_index; n=z.avail_in;b=bitb;k=bitk; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
489 q=write;m=(int)(q<read?read-q-1:end-q); |
0 | 490 |
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
491 if (last==0){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
492 mode = TYPE; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
493 break; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
494 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
495 mode = DRY; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
496 case DRY: |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
497 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
498 r=inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
499 q=write; m=(int)(q<read?read-q-1:end-q); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
500 if (read != write){ |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
501 bitb=b; bitk=k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
502 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
503 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
504 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
505 } |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
506 mode = DONE; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
507 case DONE: |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
508 r = Z_STREAM_END; |
0 | 509 |
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
510 bitb=b; bitk=k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
511 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
512 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
513 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
514 case BAD: |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
515 r = Z_DATA_ERROR; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
516 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
517 bitb=b; bitk=k; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
518 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
519 write=q; |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
520 return inflate_flush(r); |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
521 |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
522 default: |
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
523 r = Z_STREAM_ERROR; |
0 | 524 |
357
46c2115ae1c8
update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents:
0
diff
changeset
|
525 bitb=b; bitk=k; |
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526 z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p; |
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527 write=q; |
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528 return inflate_flush(r); |
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529 } |
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530 } |
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531 } |
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532 |
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533 void free(){ |
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534 reset(); |
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535 window=null; |
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536 hufts=null; |
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537 //ZFREE(z, s); |
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538 } |
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539 |
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540 void set_dictionary(byte[] d, int start, int n){ |
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541 System.arraycopy(d, start, window, 0, n); |
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542 read = write = n; |
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543 } |
0 | 544 |
357
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545 // Returns true if inflate is currently at the end of a block generated |
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546 // by Z_SYNC_FLUSH or Z_FULL_FLUSH. |
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547 int sync_point(){ |
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548 return mode == LENS ? 1 : 0; |
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549 } |
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550 |
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551 // copy as much as possible from the sliding window to the output area |
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552 int inflate_flush(int r){ |
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553 int n; |
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554 int p; |
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555 int q; |
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556 |
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557 // local copies of source and destination pointers |
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558 p = z.next_out_index; |
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559 q = read; |
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560 |
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561 // compute number of bytes to copy as far as end of window |
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562 n = (int)((q <= write ? write : end) - q); |
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563 if(n > z.avail_out) n = z.avail_out; |
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564 if(n!=0 && r == Z_BUF_ERROR) r = Z_OK; |
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565 |
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566 // update counters |
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567 z.avail_out -= n; |
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568 z.total_out += n; |
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569 |
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570 // update check information |
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571 if(check && n>0){ |
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572 z.adler.update(window, q, n); |
0 | 573 } |
574 | |
357
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575 // copy as far as end of window |
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576 System.arraycopy(window, q, z.next_out, p, n); |
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577 p += n; |
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578 q += n; |
0 | 579 |
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580 // see if more to copy at beginning of window |
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581 if (q == end){ |
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582 // wrap pointers |
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583 q = 0; |
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584 if (write == end) |
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585 write = 0; |
0 | 586 |
357
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587 // compute bytes to copy |
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588 n = write - q; |
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589 if (n > z.avail_out) n = z.avail_out; |
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590 if (n!=0 && r == Z_BUF_ERROR) r = Z_OK; |
0 | 591 |
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592 // update counters |
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593 z.avail_out -= n; |
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594 z.total_out += n; |
0 | 595 |
357
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596 // update check information |
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597 if(check && n>0){ |
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598 z.adler.update(window, q, n); |
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599 } |
0 | 600 |
357
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|
601 // copy |
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602 System.arraycopy(window, q, z.next_out, p, n); |
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603 p += n; |
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604 q += n; |
0 | 605 } |
606 | |
357
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607 // update pointers |
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608 z.next_out_index = p; |
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609 read = q; |
0 | 610 |
357
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611 // done |
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612 return r; |
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613 } |
0 | 614 } |