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88 lines
2.9 KiB
Java
88 lines
2.9 KiB
Java
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Patrick C. Beard <beard@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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import java.util.*;
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import java.io.*;
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public class Reference {
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int mAddress;
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Type mType;
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Object[] mReferences;
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public Reference(String addr, Type type, Object[] refs) throws NumberFormatException {
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mAddress = Integer.parseInt(addr.substring(2), 16);
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mType = type;
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mReferences = refs;
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}
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/**
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* Tests whether ref is an interior pointer into this reference.
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*/
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public boolean contains(long address) {
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return (mAddress <= address && address < (mAddress + mType.mSize));
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}
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/**
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* Sorts in order of increasing addresses.
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*/
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public static class ByAddress extends QuickSort.Comparator {
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public int compare(Object obj1, Object obj2) {
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Reference r1 = (Reference) obj1, r2 = (Reference) obj2;
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return (r1.mAddress - r2.mAddress);
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}
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}
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public static Reference findNearest(Reference[] sortedRefs, int address) {
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int length = sortedRefs.length;
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int minIndex = 0, maxIndex = length - 1;
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int index = maxIndex / 2;
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while (minIndex <= maxIndex) {
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Reference ref = sortedRefs[index];
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if (address < ref.mAddress) {
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maxIndex = (index - 1);
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index = (minIndex + maxIndex) / 2;
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} else {
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if (address < (ref.mAddress + ref.mType.mSize)) {
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return ref;
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}
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minIndex = (index + 1);
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index = (minIndex + maxIndex) / 2;
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}
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}
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return null;
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}
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}
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