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comparison src/com/jcraft/jzlib/ZInputStream.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
parents 0ce5cc452d02
children
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356:5e91b559b5fe 357:46c2115ae1c8
1 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */ 1 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
2 /* 2 /*
3 Copyright (c) 2001 Lapo Luchini. 3 Copyright (c) 2011 ymnk, JCraft,Inc. All rights reserved.
4 4
5 Redistribution and use in source and binary forms, with or without 5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met: 6 modification, are permitted provided that the following conditions are met:
7 7
8 1. Redistributions of source code must retain the above copyright notice, 8 1. Redistributions of source code must retain the above copyright notice,
9 this list of conditions and the following disclaimer. 9 this list of conditions and the following disclaimer.
10 10
11 2. Redistributions in binary form must reproduce the above copyright 11 2. Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in 12 notice, this list of conditions and the following disclaimer in
13 the documentation and/or other materials provided with the distribution. 13 the documentation and/or other materials provided with the distribution.
14 14
15 3. The names of the authors may not be used to endorse or promote products 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. 16 derived from this software without specific prior written permission.
17 17
18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, 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 19 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS 20 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
21 OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, 21 INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
22 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 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 24 OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 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, 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. 27 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 28 */
29 /*
30 * This program is based on zlib-1.1.3, so all credit should go authors
31 * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
32 * and contributors of zlib.
33 */
34 29
35 package com.jcraft.jzlib; 30 package com.jcraft.jzlib;
36 import java.io.*; 31 import java.io.*;
37 32
33 /**
34 * ZInputStream
35 *
36 * @deprecated use DeflaterOutputStream or InflaterInputStream
37 */
38 @Deprecated
38 public class ZInputStream extends FilterInputStream { 39 public class ZInputStream extends FilterInputStream {
39 40
40 protected ZStream z = new ZStream(); 41 protected int flush=JZlib.Z_NO_FLUSH;
41 protected int bufsize = 512; 42 protected boolean compress;
42 protected int flush = JZlib.Z_NO_FLUSH; 43 protected InputStream in=null;
43 protected byte[] buf = new byte[bufsize],
44 buf1 = new byte[1];
45 protected boolean compress;
46 44
47 protected InputStream in = null; 45 protected Deflater deflater;
46 protected InflaterInputStream iis;
48 47
49 public ZInputStream(InputStream in) { 48 public ZInputStream(InputStream in) throws IOException {
50 this(in, false); 49 this(in, false);
50 }
51 public ZInputStream(InputStream in, boolean nowrap) throws IOException {
52 super(in);
53 iis = new InflaterInputStream(in, nowrap);
54 compress=false;
55 }
56
57 public ZInputStream(InputStream in, int level) throws IOException {
58 super(in);
59 this.in=in;
60 deflater = new Deflater();
61 deflater.init(level);
62 compress=true;
63 }
64
65 private byte[] buf1 = new byte[1];
66 public int read() throws IOException {
67 if(read(buf1, 0, 1)==-1) return -1;
68 return(buf1[0]&0xFF);
69 }
70
71 private byte[] buf = new byte[512];
72
73 public int read(byte[] b, int off, int len) throws IOException {
74 if(compress){
75 deflater.setOutput(b, off, len);
76 while(true){
77 int datalen = in.read(buf, 0, buf.length);
78 if(datalen == -1) return -1;
79 deflater.setInput(buf, 0, datalen, true);
80 int err = deflater.deflate(flush);
81 if(deflater.next_out_index>0)
82 return deflater.next_out_index;
83 if(err == JZlib.Z_STREAM_END)
84 return 0;
85 if(err == JZlib.Z_STREAM_ERROR ||
86 err == JZlib.Z_DATA_ERROR){
87 throw new ZStreamException("deflating: "+deflater.msg);
88 }
89 }
51 } 90 }
52 public ZInputStream(InputStream in, boolean nowrap) { 91 else{
53 super(in); 92 return iis.read(b, off, len);
54 this.in = in;
55 z.inflateInit(nowrap);
56 compress = false;
57 z.next_in = buf;
58 z.next_in_index = 0;
59 z.avail_in = 0;
60 } 93 }
94 }
61 95
62 public ZInputStream(InputStream in, int level) { 96 public long skip(long n) throws IOException {
63 super(in); 97 int len=512;
64 this.in = in; 98 if(n<len)
65 z.deflateInit(level); 99 len=(int)n;
66 compress = true; 100 byte[] tmp=new byte[len];
67 z.next_in = buf; 101 return((long)read(tmp));
68 z.next_in_index = 0; 102 }
69 z.avail_in = 0;
70 }
71 103
72 /*public int available() throws IOException { 104 public int getFlushMode() {
73 return inf.finished() ? 0 : 1; 105 return flush;
74 }*/ 106 }
75 107
76 public int read() throws IOException { 108 public void setFlushMode(int flush) {
77 if (read(buf1, 0, 1) == -1) 109 this.flush=flush;
78 return (-1); 110 }
79 111
80 return (buf1[0] & 0xFF); 112 public long getTotalIn() {
81 } 113 if(compress) return deflater.total_in;
114 else return iis.getTotalIn();
115 }
82 116
83 private boolean nomoreinput = false; 117 public long getTotalOut() {
118 if(compress) return deflater.total_out;
119 else return iis.getTotalOut();
120 }
84 121
85 public int read(byte[] b, int off, int len) throws IOException { 122 public void close() throws IOException{
86 if (len == 0) 123 if(compress) deflater.end();
87 return (0); 124 else iis.close();
88 125 }
89 int err;
90 z.next_out = b;
91 z.next_out_index = off;
92 z.avail_out = len;
93
94 do {
95 if ((z.avail_in == 0) && (!nomoreinput)) { // if buffer is empty and more input is avaiable, refill it
96 z.next_in_index = 0;
97 z.avail_in = in.read(buf, 0, bufsize); //(bufsize<z.avail_out ? bufsize : z.avail_out));
98
99 if (z.avail_in == -1) {
100 z.avail_in = 0;
101 nomoreinput = true;
102 }
103 }
104
105 if (compress)
106 err = z.deflate(flush);
107 else
108 err = z.inflate(flush);
109
110 if (nomoreinput && (err == JZlib.Z_BUF_ERROR))
111 return (-1);
112
113 if (err != JZlib.Z_OK && err != JZlib.Z_STREAM_END)
114 throw new ZStreamException((compress ? "de" : "in") + "flating: " + z.msg);
115
116 if ((nomoreinput || err == JZlib.Z_STREAM_END) && (z.avail_out == len))
117 return (-1);
118 }
119 while (z.avail_out == len && err == JZlib.Z_OK);
120
121 //System.err.print("("+(len-z.avail_out)+")");
122 return (len - z.avail_out);
123 }
124
125 public long skip(long n) throws IOException {
126 int len = 512;
127
128 if (n < len)
129 len = (int)n;
130
131 byte[] tmp = new byte[len];
132 return ((long)read(tmp));
133 }
134
135 public int getFlushMode() {
136 return (flush);
137 }
138
139 public void setFlushMode(int flush) {
140 this.flush = flush;
141 }
142
143 /**
144 * Returns the total number of bytes input so far.
145 */
146 public long getTotalIn() {
147 return z.total_in;
148 }
149
150 /**
151 * Returns the total number of bytes output so far.
152 */
153 public long getTotalOut() {
154 return z.total_out;
155 }
156
157 public void close() throws IOException {
158 in.close();
159 }
160 } 126 }