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
|
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.amqp_1_0.type;
import java.math.BigInteger;
public final class UnsignedLong extends Number implements Comparable<UnsignedLong>
{
private static final BigInteger TWO_TO_THE_SIXTY_FOUR = new BigInteger( new byte[] { (byte) 1, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0 });
private static final BigInteger LONG_MAX_VALUE = BigInteger.valueOf(Long.MAX_VALUE);
private static final UnsignedLong[] cachedValues = new UnsignedLong[256];
static
{
for(int i = 0; i<256; i++)
{
cachedValues[i] = new UnsignedLong(i);
}
}
public static final UnsignedLong ZERO = cachedValues[0];
public static final UnsignedLong ONE = cachedValues[1];
private final long _underlying;
public UnsignedLong(long underlying)
{
_underlying = underlying;
}
@Override
public int intValue()
{
return (int) _underlying;
}
@Override
public long longValue()
{
return _underlying;
}
public BigInteger bigIntegerValue()
{
if(_underlying >= 0L)
{
return BigInteger.valueOf(_underlying);
}
else
{
return TWO_TO_THE_SIXTY_FOUR.add(BigInteger.valueOf(_underlying));
}
}
@Override
public float floatValue()
{
return (float) longValue();
}
@Override
public double doubleValue()
{
return (double) longValue();
}
@Override
public boolean equals(Object o)
{
if (this == o)
{
return true;
}
if (o == null || getClass() != o.getClass())
{
return false;
}
UnsignedLong that = (UnsignedLong) o;
if (_underlying != that._underlying)
{
return false;
}
return true;
}
public int compareTo(UnsignedLong o)
{
return bigIntegerValue().compareTo(o.bigIntegerValue());
}
@Override
public int hashCode()
{
return (int)(_underlying ^ (_underlying >>> 32));
}
@Override
public String toString()
{
return String.valueOf(bigIntegerValue());
}
public static UnsignedLong valueOf(long underlying)
{
if((underlying & 0xFFL) == underlying)
{
return cachedValues[(int)underlying];
}
else
{
return new UnsignedLong(underlying);
}
}
public static UnsignedLong valueOf(final String value)
{
BigInteger bigInt = new BigInteger(value);
if(bigInt.signum() == -1 || bigInt.bitCount()>64)
{
throw new NumberFormatException("Value \""+value+"\" lies outside the range [" + 0L + "- 2^64).");
}
else if(bigInt.compareTo(LONG_MAX_VALUE)>=0)
{
return UnsignedLong.valueOf(bigInt.longValue());
}
else
{
return UnsignedLong.valueOf(TWO_TO_THE_SIXTY_FOUR.subtract(bigInt).negate().longValue());
}
}
public UnsignedLong add(UnsignedLong unsignedLong)
{
return UnsignedLong.valueOf(_underlying + unsignedLong._underlying);
}
}
|
