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 }