1 /*
   2  * Copyright (c) 2011, 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 package jdk.vm.ci.meta;
  24 
  25 import java.util.ArrayList;
  26 import java.util.List;
  27 
  28 public class LocalVariableTable {
  29 
  30     private final Local[] locals;
  31 
  32     public LocalVariableTable(Local[] locals) {
  33         this.locals = locals;
  34     }
  35 
  36     public Local getLocal(int slot, int bci) {
  37         Local result = null;
  38         for (Local local : locals) {
  39             if (local.getSlot() == slot && local.getStartBCI() <= bci && local.getEndBCI() >= bci) {
  40                 if (result == null) {
  41                     result = local;
  42                 } else {
  43                     throw new IllegalStateException("Locals overlap!");
  44                 }
  45             }
  46         }
  47         return result;
  48     }
  49 
  50     public Local[] getLocals() {
  51         return locals;
  52     }
  53 
  54     public Local[] getLocalsAt(int bci) {
  55         List<Local> result = new ArrayList<>();
  56         for (Local l : locals) {
  57             if (l.getStartBCI() <= bci && bci <= l.getEndBCI()) {
  58                 result.add(l);
  59             }
  60         }
  61         return result.toArray(new Local[result.size()]);
  62     }
  63 }