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annotate src/com/jcraft/jzlib/GZIPOutputStream.java @ 387:04a0316bbfe3

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author Carl Byington <carl@five-ten-sg.com>
date Wed, 06 Aug 2014 11:50:58 -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 public class GZIPOutputStream extends DeflaterOutputStream {
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34
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35 public GZIPOutputStream(OutputStream out) throws IOException {
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36 this(out, DEFAULT_BUFSIZE);
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37 }
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38
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39 public GZIPOutputStream(OutputStream out, int size) throws IOException {
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40 this(out, size, true);
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41 }
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42
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43 public GZIPOutputStream(OutputStream out,
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44 int size,
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45 boolean close_out) throws IOException {
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46 this(out,
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47 new Deflater(JZlib.Z_DEFAULT_COMPRESSION, 15+16),
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48 size, close_out);
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49 mydeflater=true;
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50 }
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51
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52 public GZIPOutputStream(OutputStream out,
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53 Deflater deflater,
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54 int size,
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55 boolean close_out) throws IOException{
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56 super(out, deflater, size, close_out);
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57 }
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58
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59
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60 private void check() throws GZIPException {
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61 if(deflater.dstate.status != 42 /*INIT_STATUS*/)
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62 throw new GZIPException("header is already written.");
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63 }
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64
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65 public void setModifiedTime(long mtime) throws GZIPException {
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66 check();
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67 deflater.dstate.getGZIPHeader().setModifiedTime(mtime);
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68 }
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69
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70 public void setOS(int os) throws GZIPException {
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71 check();
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72 deflater.dstate.getGZIPHeader().setOS(os);
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73 }
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74
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75 public void setName(String name) throws GZIPException {
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76 check();
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77 deflater.dstate.getGZIPHeader().setName(name);
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78 }
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79
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80 public void setComment(String comment) throws GZIPException {
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81 check();
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82 deflater.dstate.getGZIPHeader().setComment(comment);
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83 }
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84
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85 public long getCRC() throws GZIPException {
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86 if(deflater.dstate.status != 666 /*FINISH_STATE*/)
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87 throw new GZIPException("checksum is not calculated yet.");
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88 return deflater.dstate.getGZIPHeader().getCRC();
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89 }
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90 }