1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
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7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
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22  */
23 
24 
25 package org.graalvm.compiler.core.common.util;
26 
27 public final class UnsignedLong {
28     private final long value;
29 
UnsignedLong(long value)30     public UnsignedLong(long value) {
31         this.value = value;
32     }
33 
asLong()34     public long asLong() {
35         return value;
36     }
37 
equals(long unsignedValue)38     public boolean equals(long unsignedValue) {
39         return value == unsignedValue;
40     }
41 
isLessThan(long unsignedValue)42     public boolean isLessThan(long unsignedValue) {
43         return Long.compareUnsigned(value, unsignedValue) < 0;
44     }
45 
isGreaterThan(long unsignedValue)46     public boolean isGreaterThan(long unsignedValue) {
47         return Long.compareUnsigned(value, unsignedValue) > 0;
48     }
49 
isLessOrEqualTo(long unsignedValue)50     public boolean isLessOrEqualTo(long unsignedValue) {
51         return Long.compareUnsigned(value, unsignedValue) <= 0;
52     }
53 
times(long unsignedValue)54     public UnsignedLong times(long unsignedValue) {
55         if (unsignedValue != 0 && Long.compareUnsigned(value, Long.divideUnsigned(0xffff_ffff_ffff_ffffL, unsignedValue)) > 0) {
56             throw new ArithmeticException();
57         }
58         return new UnsignedLong(value * unsignedValue);
59     }
60 
minus(long unsignedValue)61     public UnsignedLong minus(long unsignedValue) {
62         if (Long.compareUnsigned(value, unsignedValue) < 0) {
63             throw new ArithmeticException();
64         }
65         return new UnsignedLong(value - unsignedValue);
66     }
67 
plus(long unsignedValue)68     public UnsignedLong plus(long unsignedValue) {
69         if (Long.compareUnsigned(0xffff_ffff_ffff_ffffL - unsignedValue, value) < 0) {
70             throw new ArithmeticException();
71         }
72         return new UnsignedLong(value + unsignedValue);
73     }
74 
wrappingPlus(long unsignedValue)75     public UnsignedLong wrappingPlus(long unsignedValue) {
76         return new UnsignedLong(value + unsignedValue);
77     }
78 
wrappingTimes(long unsignedValue)79     public UnsignedLong wrappingTimes(long unsignedValue) {
80         return new UnsignedLong(value * unsignedValue);
81     }
82 
83     @Override
toString()84     public String toString() {
85         return "UnsignedLong(" + Long.toUnsignedString(value) + ")";
86     }
87 
88     @Override
equals(Object o)89     public boolean equals(Object o) {
90         if (this == o) {
91             return true;
92         }
93         if (o == null || getClass() != o.getClass()) {
94             return false;
95         }
96         UnsignedLong that = (UnsignedLong) o;
97         return value == that.value;
98     }
99 
100     @Override
hashCode()101     public int hashCode() {
102         return Long.hashCode(value);
103     }
104 }
105