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LargePriorityQueue.java
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99 lines (85 loc) · 2.11 KB
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package soot.util;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 1997 - 2018 Raja Vallée-Rai and others
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>.
* #L%
*/
import java.util.BitSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
// QND
class LargePriorityQueue<E> extends PriorityQueue<E> {
private final BitSet queue;
private long modCount = 0;
LargePriorityQueue(List<? extends E> universe, Map<E, Integer> ordinalMap) {
super(universe, ordinalMap);
queue = new BitSet(N);
}
@Override
boolean add(int ordinal) {
if (contains(ordinal)) {
return false;
}
queue.set(ordinal);
min = Math.min(min, ordinal);
modCount++;
return true;
}
@Override
void addAll() {
queue.set(0, N);
min = 0;
modCount++;
}
@Override
int nextSetBit(int fromIndex) {
int i = queue.nextSetBit(fromIndex);
return (i < 0) ? Integer.MAX_VALUE : i;
}
@Override
boolean remove(int ordinal) {
if (!contains(ordinal)) {
return false;
}
queue.clear(ordinal);
if (min == ordinal) {
min = nextSetBit(min + 1);
}
modCount++;
return true;
}
@Override
boolean contains(int ordinal) {
return queue.get(ordinal);
}
@Override
public Iterator<E> iterator() {
return new Itr() {
@Override
long getExpected() {
return modCount;
}
};
}
@Override
public int size() {
return queue.cardinality();
}
}