1 /* 2 * Copyright (c) 2016, 2017, 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; 26 27 /** 28 * A compact representation of the different encoding strategies for Objects and metadata. 29 */ 30 public final class CompressEncoding { 31 private final long base; 32 private final int shift; 33 34 public CompressEncoding(long base, int shift) { 35 this.base = base; 36 this.shift = shift; 37 } 38 39 public boolean hasBase() { 40 return base != 0; 41 } 42 43 public boolean hasShift() { 44 return shift != 0; 45 } 46 47 public long getBase() { 48 return base; 49 } 50 51 public int getShift() { 52 return shift; 53 } 54 55 @Override 56 public String toString() { 57 return "base: " + base + " shift: " + shift; 58 } 59 60 @Override 61 public int hashCode() { 62 final int prime = 31; 63 int result = 1; 64 result = prime * result + (int) (base ^ (base >>> 32)); 65 result = prime * result + shift; 66 return result; 67 } 68 69 @Override 70 public boolean equals(Object obj) { 71 if (obj instanceof CompressEncoding) { 72 CompressEncoding other = (CompressEncoding) obj; 73 return base == other.base && shift == other.shift; 74 } 75 return false; 76 } 77 }