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annotate src/com/jcraft/jzlib/ZInputStream.java @ 386:e481699db6b1

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author Carl Byington <carl@five-ten-sg.com>
date Wed, 06 Aug 2014 11:50:10 -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 * ZInputStream
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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 ZInputStream extends FilterInputStream {
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40
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41 protected int flush=JZlib.Z_NO_FLUSH;
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42 protected boolean compress;
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43 protected InputStream in=null;
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44
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45 protected Deflater deflater;
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46 protected InflaterInputStream iis;
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47
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48 public ZInputStream(InputStream in) throws IOException {
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49 this(in, false);
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50 }
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51 public ZInputStream(InputStream in, boolean nowrap) throws IOException {
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52 super(in);
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53 iis = new InflaterInputStream(in, nowrap);
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54 compress=false;
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55 }
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56
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57 public ZInputStream(InputStream in, int level) throws IOException {
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58 super(in);
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59 this.in=in;
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60 deflater = new Deflater();
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61 deflater.init(level);
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62 compress=true;
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63 }
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64
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65 private byte[] buf1 = new byte[1];
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66 public int read() throws IOException {
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67 if(read(buf1, 0, 1)==-1) return -1;
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68 return(buf1[0]&0xFF);
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69 }
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70
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71 private byte[] buf = new byte[512];
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72
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73 public int read(byte[] b, int off, int len) throws IOException {
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74 if(compress){
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75 deflater.setOutput(b, off, len);
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76 while(true){
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77 int datalen = in.read(buf, 0, buf.length);
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78 if(datalen == -1) return -1;
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79 deflater.setInput(buf, 0, datalen, true);
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80 int err = deflater.deflate(flush);
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81 if(deflater.next_out_index>0)
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82 return deflater.next_out_index;
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83 if(err == JZlib.Z_STREAM_END)
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84 return 0;
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85 if(err == JZlib.Z_STREAM_ERROR ||
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86 err == JZlib.Z_DATA_ERROR){
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87 throw new ZStreamException("deflating: "+deflater.msg);
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88 }
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89 }
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90 }
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91 else{
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92 return iis.read(b, off, len);
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93 }
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94 }
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95
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96 public long skip(long n) throws IOException {
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97 int len=512;
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98 if(n<len)
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99 len=(int)n;
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100 byte[] tmp=new byte[len];
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101 return((long)read(tmp));
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102 }
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103
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104 public int getFlushMode() {
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105 return flush;
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106 }
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107
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108 public void setFlushMode(int flush) {
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109 this.flush=flush;
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110 }
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111
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112 public long getTotalIn() {
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113 if(compress) return deflater.total_in;
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114 else return iis.getTotalIn();
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115 }
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116
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117 public long getTotalOut() {
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118 if(compress) return deflater.total_out;
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119 else return iis.getTotalOut();
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120 }
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121
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122 public void close() throws IOException{
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123 if(compress) deflater.end();
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Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
124 else iis.close();
46c2115ae1c8 update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
Carl Byington <carl@five-ten-sg.com>
parents: 0
diff changeset
125 }
0
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
126 }