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comparison src/com/jcraft/jzlib/DeflaterOutputStream.java @ 357:46c2115ae1c8

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update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
author Carl Byington <carl@five-ten-sg.com>
date Fri, 01 Aug 2014 13:34:58 -0700
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356:5e91b559b5fe 357:46c2115ae1c8
1 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
2 /*
3 Copyright (c) 2011 ymnk, JCraft,Inc. All rights reserved.
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
11 2. Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in
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 package com.jcraft.jzlib;
31 import java.io.*;
32
33 public class DeflaterOutputStream extends FilterOutputStream {
34
35 protected final Deflater deflater;
36
37 protected byte[] buffer;
38
39 private boolean closed = false;
40
41 private boolean syncFlush = false;
42
43 private final byte[] buf1 = new byte[1];
44
45 protected boolean mydeflater = false;
46
47 private boolean close_out = true;
48
49 protected static final int DEFAULT_BUFSIZE = 512;
50
51 public DeflaterOutputStream(OutputStream out) throws IOException {
52 this(out,
53 new Deflater(JZlib.Z_DEFAULT_COMPRESSION),
54 DEFAULT_BUFSIZE, true);
55 mydeflater = true;
56 }
57
58 public DeflaterOutputStream(OutputStream out, Deflater def) throws IOException {
59 this(out, def, DEFAULT_BUFSIZE, true);
60 }
61
62 public DeflaterOutputStream(OutputStream out,
63 Deflater deflater,
64 int size) throws IOException {
65 this(out, deflater, size, true);
66 }
67 public DeflaterOutputStream(OutputStream out,
68 Deflater deflater,
69 int size,
70 boolean close_out) throws IOException {
71 super(out);
72 if (out == null || deflater == null) {
73 throw new NullPointerException();
74 }
75 else if (size <= 0) {
76 throw new IllegalArgumentException("buffer size must be greater than 0");
77 }
78 this.deflater = deflater;
79 buffer = new byte[size];
80 this.close_out = close_out;
81 }
82
83 public void write(int b) throws IOException {
84 buf1[0] = (byte)(b & 0xff);
85 write(buf1, 0, 1);
86 }
87
88 public void write(byte[] b, int off, int len) throws IOException {
89 if (deflater.finished()) {
90 throw new IOException("finished");
91 }
92 else if (off<0 | len<0 | off+len>b.length) {
93 throw new IndexOutOfBoundsException();
94 }
95 else if (len == 0) {
96 return;
97 }
98 else {
99 int flush = syncFlush ? JZlib.Z_SYNC_FLUSH : JZlib.Z_NO_FLUSH;
100 deflater.setInput(b, off, len, true);
101 while (deflater.avail_in>0) {
102 int err = deflate(flush);
103 if (err == JZlib.Z_STREAM_END)
104 break;
105 }
106 }
107 }
108
109 public void finish() throws IOException {
110 while (!deflater.finished()) {
111 deflate(JZlib.Z_FINISH);
112 }
113 }
114
115 public void close() throws IOException {
116 if (!closed) {
117 finish();
118 if (mydeflater){
119 deflater.end();
120 }
121 if(close_out)
122 out.close();
123 closed = true;
124 }
125 }
126
127 protected int deflate(int flush) throws IOException {
128 deflater.setOutput(buffer, 0, buffer.length);
129 int err = deflater.deflate(flush);
130 switch(err) {
131 case JZlib.Z_OK:
132 case JZlib.Z_STREAM_END:
133 break;
134 case JZlib.Z_BUF_ERROR:
135 if(deflater.avail_in<=0 && flush!=JZlib.Z_FINISH){
136 // flush() without any data
137 break;
138 }
139 default:
140 throw new IOException("failed to deflate: error="+err+" avail_out="+deflater.avail_out);
141 }
142 int len = deflater.next_out_index;
143 if (len > 0) {
144 out.write(buffer, 0, len);
145 }
146 return err;
147 }
148
149 public void flush() throws IOException {
150 if (syncFlush && !deflater.finished()) {
151 while (true) {
152 int err = deflate(JZlib.Z_SYNC_FLUSH);
153 if (deflater.next_out_index < buffer.length)
154 break;
155 if (err == JZlib.Z_STREAM_END)
156 break;
157 }
158 }
159 out.flush();
160 }
161
162 public long getTotalIn() {
163 return deflater.getTotalIn();
164 }
165
166 public long getTotalOut() {
167 return deflater.getTotalOut();
168 }
169
170 public void setSyncFlush(boolean syncFlush){
171 this.syncFlush = syncFlush;
172 }
173
174 public boolean getSyncFlush(){
175 return this.syncFlush;
176 }
177
178 public Deflater getDeflater(){
179 return deflater;
180 }
181 }