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
25package sun.jvm.hotspot.runtime;
26
27import java.util.*;
28
29import sun.jvm.hotspot.debugger.*;
30
31public class StackValueCollection {
32  private List list;
33
34  public StackValueCollection()           { list = new ArrayList(); }
35  public StackValueCollection(int length) { list = new ArrayList(length); }
36
37  public void add(StackValue val) { list.add(val); }
38  public int  size()              { return list.size(); }
39  public boolean isEmpty()        { return (size() == 0); }
40  public StackValue get(int i)    { return (StackValue) list.get(i); }
41
42  // Get typed locals/expressions
43  // FIXME: must figure out whether word swapping is necessary on x86
44  public boolean   booleanAt(int slot)   { return (int)get(slot).getInteger() != 0; }
45  public byte      byteAt(int slot)      { return (byte) get(slot).getInteger(); }
46  public char      charAt(int slot)      { return (char) get(slot).getInteger(); }
47  public short     shortAt(int slot)     { return (short) get(slot).getInteger(); }
48  public int       intAt(int slot)       { return (int) get(slot).getInteger(); }
49  public long      longAt(int slot)      { return VM.getVM().buildLongFromIntsPD((int) get(slot).getInteger(),
50                                                                                 (int) get(slot+1).getInteger()); }
51  public OopHandle oopHandleAt(int slot) { return get(slot).getObject(); }
52  public float     floatAt(int slot)     { return Float.intBitsToFloat(intAt(slot)); }
53  public double    doubleAt(int slot)    { return Double.longBitsToDouble(longAt(slot)); }
54}
55