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annotate src/com/jcraft/jzlib/ZOutputStream.java @ 416:07c1da90deab

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avoid null pointer
author Carl Byington <carl@five-ten-sg.com>
date Mon, 27 Oct 2014 13:58:42 -0700
parents 46c2115ae1c8
children
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1 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
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2 /*
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3 Copyright (c) 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 /**
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34 * ZOutputStream
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35 *
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36 * @deprecated use DeflaterOutputStream or InflaterInputStream
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37 */
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38 @Deprecated
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39 public class ZOutputStream extends FilterOutputStream {
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40
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41 protected int bufsize=512;
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42 protected int flush=JZlib.Z_NO_FLUSH;
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43 protected byte[] buf=new byte[bufsize];
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44 protected boolean compress;
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45
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46 protected OutputStream out;
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47 private boolean end=false;
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48
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49 private DeflaterOutputStream dos;
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50 private Inflater inflater;
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51
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52 public ZOutputStream(OutputStream out) throws IOException {
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53 super(out);
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54 this.out=out;
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55 inflater = new Inflater();
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56 inflater.init();
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57 compress=false;
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58 }
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59
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60 public ZOutputStream(OutputStream out, int level) throws IOException {
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61 this(out, level, false);
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62 }
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63
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64 public ZOutputStream(OutputStream out, int level, boolean nowrap) throws IOException {
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65 super(out);
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66 this.out=out;
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67 Deflater deflater = new Deflater(level, nowrap);
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68 dos = new DeflaterOutputStream(out, deflater);
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69 compress=true;
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70 }
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71
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72 private byte[] buf1 = new byte[1];
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73 public void write(int b) throws IOException {
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74 buf1[0]=(byte)b;
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75 write(buf1, 0, 1);
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76 }
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77
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78 public void write(byte b[], int off, int len) throws IOException {
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79 if(len==0) return;
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80 if(compress){
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81 dos.write(b, off, len);
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82 }
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83 else {
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84 inflater.setInput(b, off, len, true);
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85 int err = JZlib.Z_OK;
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86 while(inflater.avail_in>0){
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87 inflater.setOutput(buf, 0, buf.length);
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88 err = inflater.inflate(flush);
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89 if(inflater.next_out_index>0)
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90 out.write(buf, 0, inflater.next_out_index);
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91 if(err != JZlib.Z_OK)
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92 break;
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93 }
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94 if(err != JZlib.Z_OK)
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95 throw new ZStreamException("inflating: "+inflater.msg);
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96 return;
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97 }
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98 }
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99
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100 public int getFlushMode() {
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101 return flush;
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102 }
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103
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104 public void setFlushMode(int flush) {
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105 this.flush=flush;
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106 }
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107
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108 public void finish() throws IOException {
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109 int err;
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110 if(compress){
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111 int tmp = flush;
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112 int flush = JZlib.Z_FINISH;
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113 try{
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114 write("".getBytes(), 0, 0);
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115 }
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116 finally { flush = tmp; }
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117 }
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118 else{
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119 dos.finish();
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120 }
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121 flush();
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122 }
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123 public synchronized void end() {
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124 if(end) return;
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125 if(compress){
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126 try { dos.finish(); } catch(Exception e){}
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127 }
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128 else{
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129 inflater.end();
0
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130 }
357
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131 end=true;
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132 }
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133 public void close() throws IOException {
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134 try{
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135 try{finish();}
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136 catch (IOException ignored) {}
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137 }
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138 finally{
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139 end();
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140 out.close();
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141 out=null;
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142 }
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143 }
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144
357
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145 public long getTotalIn() {
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146 if(compress) return dos.getTotalIn();
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147 else return inflater.total_in;
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148 }
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149
357
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150 public long getTotalOut() {
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151 if(compress) return dos.getTotalOut();
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152 else return inflater.total_out;
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153 }
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154
357
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155 public void flush() throws IOException {
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156 out.flush();
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157 }
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158
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159 }