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
|
/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package demos.util;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.FilterInputStream;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.EOFException;
import java.io.IOException;
/**
* Little Endian Data Input Stream.
*
* This class implements an input stream filter to allow reading
* of java native datatypes from an input stream which has those
* native datatypes stored in a little endian byte order.<p>
*
* This is the sister class of the DataInputStream which allows
* for reading of java native datatypes from an input stream with
* the datatypes stored in big endian byte order.<p>
*
* This class implements the minimum required and calls DataInputStream
* for some of the required methods for DataInput.<p>
*
* Not all methods are implemented due to lack of immediatte requirement
* for that functionality. It is not clear if it is ever going to be
* functionally required to be able to read UTF data in a LittleEndianManner<p>
*
* @author Robin Luiten
* @version 1.1 15/Dec/1997
*/
public class LEDataInputStream extends FilterInputStream implements DataInput
{
/**
* To reuse some of the non endian dependent methods from
* DataInputStreams methods.
*/
DataInputStream dataIn;
public LEDataInputStream(InputStream in)
{
super(in);
dataIn = new DataInputStream(in);
}
public void close() throws IOException
{
dataIn.close(); // better close as we create it.
// this will close underlying as well.
}
public synchronized final int read(byte b[]) throws IOException
{
return dataIn.read(b, 0, b.length);
}
public synchronized final int read(byte b[], int off, int len) throws IOException
{
int rl = dataIn.read(b, off, len);
return rl;
}
public final void readFully(byte b[]) throws IOException
{
dataIn.readFully(b, 0, b.length);
}
public final void readFully(byte b[], int off, int len) throws IOException
{
dataIn.readFully(b, off, len);
}
public final int skipBytes(int n) throws IOException
{
return dataIn.skipBytes(n);
}
public final boolean readBoolean() throws IOException
{
int ch = dataIn.read();
if (ch < 0)
throw new EOFException();
return (ch != 0);
}
public final byte readByte() throws IOException
{
int ch = dataIn.read();
if (ch < 0)
throw new EOFException();
return (byte)(ch);
}
public final int readUnsignedByte() throws IOException
{
int ch = dataIn.read();
if (ch < 0)
throw new EOFException();
return ch;
}
public final short readShort() throws IOException
{
int ch1 = dataIn.read();
int ch2 = dataIn.read();
if ((ch1 | ch2) < 0)
throw new EOFException();
return (short)((ch1 << 0) + (ch2 << 8));
}
public final int readUnsignedShort() throws IOException
{
int ch1 = dataIn.read();
int ch2 = dataIn.read();
if ((ch1 | ch2) < 0)
throw new EOFException();
return (ch1 << 0) + (ch2 << 8);
}
public final char readChar() throws IOException
{
int ch1 = dataIn.read();
int ch2 = dataIn.read();
if ((ch1 | ch2) < 0)
throw new EOFException();
return (char)((ch1 << 0) + (ch2 << 8));
}
public final int readInt() throws IOException
{
int ch1 = dataIn.read();
int ch2 = dataIn.read();
int ch3 = dataIn.read();
int ch4 = dataIn.read();
if ((ch1 | ch2 | ch3 | ch4) < 0)
throw new EOFException();
return ((ch1 << 0) + (ch2 << 8) + (ch3 << 16) + (ch4 << 24));
}
public final long readLong() throws IOException
{
int i1 = readInt();
int i2 = readInt();
return ((long)(i1) & 0xFFFFFFFFL) + (i2 << 32);
}
public final float readFloat() throws IOException
{
return Float.intBitsToFloat(readInt());
}
public final double readDouble() throws IOException
{
return Double.longBitsToDouble(readLong());
}
/**
* dont call this it is not implemented.
* @return empty new string
**/
public final String readLine() throws IOException
{
return new String();
}
/**
* dont call this it is not implemented
* @return empty new string
**/
public final String readUTF() throws IOException
{
return new String();
}
/**
* dont call this it is not implemented
* @return empty new string
**/
public final static String readUTF(DataInput in) throws IOException
{
return new String();
}
}
|
