1 /*
   2  * Copyright (c) 2016, 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.code;
  26 
  27 import static jdk.vm.ci.meta.MetaUtil.identityHashCodeString;
  28 
  29 import org.graalvm.compiler.graph.NodeSourcePosition;
  30 
  31 /**
  32  * This provides a mapping between a half-open range of PCs in the generated code and a
  33  * {@link NodeSourcePosition} in the original program. Depending on the backend this information may
  34  * be represented in different ways or not at all.
  35  */
  36 public final class SourceMapping {
  37 
  38     private final int startOffset;
  39 
  40     private final int endOffset;
  41 
  42     private final NodeSourcePosition sourcePosition;
  43 
  44     public SourceMapping(int startOffset, int endOffset, NodeSourcePosition sourcePosition) {
  45         this.startOffset = startOffset;
  46         this.endOffset = endOffset;
  47         this.sourcePosition = sourcePosition;
  48     }
  49 
  50     public int getStartOffset() {
  51         return startOffset;
  52     }
  53 
  54     public int getEndOffset() {
  55         return endOffset;
  56     }
  57 
  58     public NodeSourcePosition getSourcePosition() {
  59         return sourcePosition;
  60     }
  61 
  62     @Override
  63     public String toString() {
  64         return identityHashCodeString(this);
  65     }
  66 
  67     @Override
  68     public int hashCode() {
  69         throw new UnsupportedOperationException("hashCode");
  70     }
  71 
  72     @Override
  73     public boolean equals(Object obj) {
  74         if (obj instanceof SourceMapping) {
  75             SourceMapping other = (SourceMapping) obj;
  76             return other.startOffset == startOffset && other.endOffset == endOffset && other.sourcePosition.equals(sourcePosition);
  77         }
  78         return false;
  79     }
  80 
  81     public boolean contains(int offset) {
  82         return startOffset <= offset && offset < endOffset;
  83     }
  84 
  85 }