1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
/*
Copyright (c) 2001 Lapo Luchini.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.
3. The names of the authors may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS
OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This program is based on zlib-1.1.3, so all credit should go authors
* Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
* and contributors of zlib.
*/
/* This file is a port of jzlib v1.0.7, com.jcraft.jzlib.ZOutputStream.java
*/
using System;
using System.Diagnostics;
using System.IO;
using Org.BouncyCastle.Utilities.IO;
namespace Org.BouncyCastle.Utilities.Zlib
{
public class ZOutputStream
: BaseOutputStream
{
private static ZStream GetDefaultZStream(bool nowrap)
{
ZStream z = new ZStream();
z.inflateInit(nowrap);
return z;
}
private const int BufferSize = 4096;
protected ZStream z;
protected int flushLevel = JZlib.Z_NO_FLUSH;
// TODO Allow custom buf
protected byte[] buf = new byte[BufferSize];
protected byte[] buf1 = new byte[1];
protected bool compress;
protected Stream output;
protected bool closed;
public ZOutputStream(Stream output)
: this(output, false)
{
}
public ZOutputStream(Stream output, bool nowrap)
: this(output, GetDefaultZStream(nowrap))
{
}
public ZOutputStream(Stream output, ZStream z)
: base()
{
Debug.Assert(output.CanWrite);
if (z == null)
{
z = new ZStream();
}
if (z.istate == null && z.dstate == null)
{
z.inflateInit();
}
this.output = output;
this.compress = (z.istate == null);
this.z = z;
}
public ZOutputStream(Stream output, int level)
: this(output, level, false)
{
}
public ZOutputStream(Stream output, int level, bool nowrap)
: base()
{
Debug.Assert(output.CanWrite);
this.output = output;
this.compress = true;
this.z = new ZStream();
this.z.deflateInit(level, nowrap);
}
protected void Detach(bool disposing)
{
if (disposing)
{
if (!closed)
{
try
{
try
{
Finish();
}
catch (IOException)
{
// Ignore
}
}
finally
{
this.closed = true;
End();
output = null;
}
}
}
base.Dispose(disposing);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (!closed)
{
try
{
try
{
Finish();
}
catch (IOException)
{
// Ignore
}
}
finally
{
this.closed = true;
End();
Platform.Dispose(output);
output = null;
}
}
}
base.Dispose(disposing);
}
public virtual void End()
{
if (z == null)
return;
if (compress)
z.deflateEnd();
else
z.inflateEnd();
z.free();
z = null;
}
public virtual void Finish()
{
do
{
z.next_out = buf;
z.next_out_index = 0;
z.avail_out = buf.Length;
int err = compress
? z.deflate(JZlib.Z_FINISH)
: z.inflate(JZlib.Z_FINISH);
if (err != JZlib.Z_STREAM_END && err != JZlib.Z_OK)
// TODO
//throw new ZStreamException((compress?"de":"in")+"flating: "+z.msg);
throw new IOException((compress ? "de" : "in") + "flating: " + z.msg);
int count = buf.Length - z.avail_out;
if (count > 0)
{
output.Write(buf, 0, count);
}
}
while (z.avail_in > 0 || z.avail_out == 0);
Flush();
}
public override void Flush()
{
output.Flush();
}
public virtual int FlushMode
{
get { return flushLevel; }
set { this.flushLevel = value; }
}
public virtual long TotalIn
{
get { return z.total_in; }
}
public virtual long TotalOut
{
get { return z.total_out; }
}
public override void Write(byte[] buffer, int offset, int count)
{
Streams.ValidateBufferArguments(buffer, offset, count);
if (count == 0)
return;
z.next_in = buffer;
z.next_in_index = offset;
z.avail_in = count;
do
{
z.next_out = buf;
z.next_out_index = 0;
z.avail_out = buf.Length;
int err = compress
? z.deflate(flushLevel)
: z.inflate(flushLevel);
if (err != JZlib.Z_OK)
// TODO
//throw new ZStreamException((compress ? "de" : "in") + "flating: " + z.msg);
throw new IOException((compress ? "de" : "in") + "flating: " + z.msg);
output.Write(buf, 0, buf.Length - z.avail_out);
}
while (z.avail_in > 0 || z.avail_out == 0);
}
public override void WriteByte(byte value)
{
buf1[0] = value;
Write(buf1, 0, 1);
}
}
}
|
