Mercurial > 510Connectbot
annotate src/com/jcraft/jzlib/GZIPInputStream.java @ 369:7a5943a514d5
debug kex error
author | Carl Byington <carl@five-ten-sg.com> |
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date | Mon, 04 Aug 2014 11:39:58 -0700 |
parents | 46c2115ae1c8 |
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1 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */ |
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2 /* |
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3 Copyright (c) 2011 ymnk, JCraft,Inc. All rights reserved. |
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4 |
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5 Redistribution and use in source and binary forms, with or without |
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6 modification, are permitted provided that the following conditions are met: |
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7 |
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8 1. Redistributions of source code must retain the above copyright notice, |
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9 this list of conditions and the following disclaimer. |
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10 |
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11 2. Redistributions in binary form must reproduce the above copyright |
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12 notice, this list of conditions and the following disclaimer in |
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13 the documentation and/or other materials provided with the distribution. |
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14 |
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15 3. The names of the authors may not be used to endorse or promote products |
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16 derived from this software without specific prior written permission. |
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17 |
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18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, |
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19 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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20 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT, |
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21 INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, |
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22 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
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24 OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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25 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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26 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
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27 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 */ |
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29 |
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30 package com.jcraft.jzlib; |
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31 import java.io.*; |
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32 |
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33 public class GZIPInputStream extends InflaterInputStream { |
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34 |
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35 public GZIPInputStream(InputStream in) throws IOException { |
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36 this(in, DEFAULT_BUFSIZE, true); |
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37 } |
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38 |
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39 public GZIPInputStream(InputStream in, |
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40 int size, |
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41 boolean close_in) throws IOException { |
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42 this(in, new Inflater(15+16), size, close_in); |
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43 myinflater = true; |
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44 } |
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45 |
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46 public GZIPInputStream(InputStream in, |
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47 Inflater inflater, |
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48 int size, |
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49 boolean close_in) throws IOException { |
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50 super(in, inflater, size, close_in); |
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51 } |
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52 |
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53 public long getModifiedtime() { |
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54 return inflater.istate.getGZIPHeader().getModifiedTime(); |
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55 } |
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56 |
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57 public int getOS() { |
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58 return inflater.istate.getGZIPHeader().getOS(); |
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59 } |
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60 |
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61 public String getName() { |
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62 return inflater.istate.getGZIPHeader().getName(); |
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63 } |
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64 |
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65 public String getComment() { |
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66 return inflater.istate.getGZIPHeader().getComment(); |
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67 } |
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68 |
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69 public long getCRC() throws GZIPException { |
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70 if(inflater.istate.mode != 12 /*DONE*/) |
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71 throw new GZIPException("checksum is not calculated yet."); |
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72 return inflater.istate.getGZIPHeader().getCRC(); |
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73 } |
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74 |
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75 public void readHeader() throws IOException { |
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76 |
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77 byte[] empty = "".getBytes(); |
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78 inflater.setOutput(empty, 0, 0); |
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79 inflater.setInput(empty, 0, 0, false); |
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80 |
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81 byte[] b = new byte[10]; |
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82 |
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83 int n = fill(b); |
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84 if(n!=10){ |
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85 if(n>0){ |
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86 inflater.setInput(b, 0, n, false); |
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87 //inflater.next_in_index = n; |
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88 inflater.next_in_index = 0; |
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89 inflater.avail_in = n; |
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90 } |
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91 throw new IOException("no input"); |
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92 } |
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93 |
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94 inflater.setInput(b, 0, n, false); |
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95 |
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96 byte[] b1 = new byte[1]; |
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97 do{ |
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98 if(inflater.avail_in<=0){ |
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99 int i = in.read(b1); |
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100 if(i<=0) |
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101 throw new IOException("no input"); |
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102 inflater.setInput(b1, 0, 1, true); |
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103 } |
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104 |
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105 int err = inflater.inflate(JZlib.Z_NO_FLUSH); |
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106 |
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107 if(err!=0/*Z_OK*/){ |
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108 int len = 2048-inflater.next_in.length; |
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109 if(len>0){ |
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110 byte[] tmp = new byte[len]; |
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111 n = fill(tmp); |
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112 if(n>0){ |
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113 inflater.avail_in += inflater.next_in_index; |
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114 inflater.next_in_index = 0; |
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115 inflater.setInput(tmp, 0, n, true); |
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116 } |
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117 } |
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118 //inflater.next_in_index = inflater.next_in.length; |
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119 inflater.avail_in += inflater.next_in_index; |
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120 inflater.next_in_index = 0; |
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121 throw new IOException(inflater.msg); |
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122 } |
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123 } |
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124 while(inflater.istate.inParsingHeader()); |
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125 } |
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126 |
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127 private int fill(byte[] buf) { |
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128 int len = buf.length; |
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129 int n = 0; |
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130 do{ |
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131 int i = -1; |
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132 try { |
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133 i = in.read(buf, n, buf.length - n); |
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134 } |
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135 catch(IOException e){ |
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136 } |
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137 if(i == -1){ |
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138 break; |
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139 } |
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140 n+=i; |
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141 } |
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142 while(n<len); |
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143 return n; |
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144 } |
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145 } |