RetroZilla/gc/boehm/leaksoup/Reference.java

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2015-10-21 05:03:22 +02:00
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Patrick C. Beard <beard@netscape.com>
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import java.util.*;
import java.io.*;
public class Reference {
int mAddress;
Type mType;
Object[] mReferences;
public Reference(String addr, Type type, Object[] refs) throws NumberFormatException {
mAddress = Integer.parseInt(addr.substring(2), 16);
mType = type;
mReferences = refs;
}
/**
* Tests whether ref is an interior pointer into this reference.
*/
public boolean contains(long address) {
return (mAddress <= address && address < (mAddress + mType.mSize));
}
/**
* Sorts in order of increasing addresses.
*/
public static class ByAddress extends QuickSort.Comparator {
public int compare(Object obj1, Object obj2) {
Reference r1 = (Reference) obj1, r2 = (Reference) obj2;
return (r1.mAddress - r2.mAddress);
}
}
public static Reference findNearest(Reference[] sortedRefs, int address) {
int length = sortedRefs.length;
int minIndex = 0, maxIndex = length - 1;
int index = maxIndex / 2;
while (minIndex <= maxIndex) {
Reference ref = sortedRefs[index];
if (address < ref.mAddress) {
maxIndex = (index - 1);
index = (minIndex + maxIndex) / 2;
} else {
if (address < (ref.mAddress + ref.mType.mSize)) {
return ref;
}
minIndex = (index + 1);
index = (minIndex + maxIndex) / 2;
}
}
return null;
}
}