1 /* 2 * Copyright (c) 2001, 2003, 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 sun.jvm.hotspot.runtime; 26 27 import java.util.*; 28 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.types.*; 31 32 public class StackValueCollection { 33 private List list; 34 35 public StackValueCollection() { list = new ArrayList(); } 36 public StackValueCollection(int length) { list = new ArrayList(length); } 37 38 public void add(StackValue val) { list.add(val); } 39 public int size() { return list.size(); } 40 public boolean isEmpty() { return (size() == 0); } 41 public StackValue get(int i) { return (StackValue) list.get(i); } 42 43 // Get typed locals/expressions 44 // FIXME: must figure out whether word swapping is necessary on x86 45 public boolean booleanAt(int slot) { return (int)get(slot).getInteger() != 0; } 46 public byte byteAt(int slot) { return (byte) get(slot).getInteger(); } 47 public char charAt(int slot) { return (char) get(slot).getInteger(); } 48 public short shortAt(int slot) { return (short) get(slot).getInteger(); } 49 public int intAt(int slot) { return (int) get(slot).getInteger(); } 50 public long longAt(int slot) { return VM.getVM().buildLongFromIntsPD((int) get(slot).getInteger(), 51 (int) get(slot+1).getInteger()); } 52 53 public OopHandle oopHandleAt(int slot) { 54 StackValue sv = get(slot); 55 if (sv.getType() == BasicType.getTConflict()) { 56 throw new WrongTypeException("Conflict type"); 57 } 58 return sv.getObject(); 59 } 60 61 public float floatAt(int slot) { return Float.intBitsToFloat(intAt(slot)); } 62 public double doubleAt(int slot) { return Double.longBitsToDouble(longAt(slot)); } 63 }