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1 /*
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2 * Copyright 2001-2003 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.runtime;
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26
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27 import java.util.*;
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28
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29 import sun.jvm.hotspot.debugger.*;
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30
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31 public class StackValueCollection {
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32 private List list;
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33
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34 public StackValueCollection() { list = new ArrayList(); }
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35 public StackValueCollection(int length) { list = new ArrayList(length); }
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36
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37 public void add(StackValue val) { list.add(val); }
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38 public int size() { return list.size(); }
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39 public boolean isEmpty() { return (size() == 0); }
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40 public StackValue get(int i) { return (StackValue) list.get(i); }
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41
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42 // Get typed locals/expressions
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43 // FIXME: must figure out whether word swapping is necessary on x86
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44 public boolean booleanAt(int slot) { return (int)get(slot).getInteger() != 0; }
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45 public byte byteAt(int slot) { return (byte) get(slot).getInteger(); }
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46 public char charAt(int slot) { return (char) get(slot).getInteger(); }
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47 public short shortAt(int slot) { return (short) get(slot).getInteger(); }
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48 public int intAt(int slot) { return (int) get(slot).getInteger(); }
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49 public long longAt(int slot) { return VM.getVM().buildLongFromIntsPD((int) get(slot).getInteger(),
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50 (int) get(slot+1).getInteger()); }
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51 public OopHandle oopHandleAt(int slot) { return get(slot).getObject(); }
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52 public float floatAt(int slot) { return Float.intBitsToFloat(intAt(slot)); }
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53 public double doubleAt(int slot) { return Double.longBitsToDouble(longAt(slot)); }
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54 }
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