1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 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 6 * under the terms of the GNU General Public License version 2 only, as 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 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.core.common.util; 26 27 public final class UnsignedLong { 28 private final long value; 29 30 public UnsignedLong(long value) { 31 this.value = value; 32 } 33 34 public long asLong() { 35 return value; 36 } 37 38 public boolean equals(long unsignedValue) { 39 return value == unsignedValue; 40 } 41 42 public boolean isLessThan(long unsignedValue) { 43 return Long.compareUnsigned(value, unsignedValue) < 0; 44 } 45 46 public boolean isGreaterThan(long unsignedValue) { 47 return Long.compareUnsigned(value, unsignedValue) > 0; 48 } 49 50 public boolean isLessOrEqualTo(long unsignedValue) { 51 return Long.compareUnsigned(value, unsignedValue) <= 0; 52 } 53 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 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 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 75 public UnsignedLong wrappingPlus(long unsignedValue) { 76 return new UnsignedLong(value + unsignedValue); 77 } 78 79 public UnsignedLong wrappingTimes(long unsignedValue) { 80 return new UnsignedLong(value * unsignedValue); 81 } 82 83 @Override 84 public String toString() { 85 return "UnsignedLong(" + Long.toUnsignedString(value) + ")"; 86 } 87 88 @Override 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 101 public int hashCode() { 102 return Long.hashCode(value); 103 } 104 }