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360 lines
8.1 KiB
360 lines
8.1 KiB
/*
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* Copyright 2000-2014 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jetbrains.java.decompiler.util;
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import java.util.*;
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public class FastFixedSetFactory<E> {
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private VBStyleCollection<int[], E> colValuesInternal = new VBStyleCollection<int[], E>();
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private int dataLength;
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public FastFixedSetFactory(Collection<E> set) {
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dataLength = set.size() / 32 + 1;
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int index = 0;
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int mask = 1;
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for (E element : set) {
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int block = index / 32;
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if (index % 32 == 0) {
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mask = 1;
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}
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colValuesInternal.putWithKey(new int[]{block, mask}, element);
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index++;
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mask <<= 1;
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}
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}
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public FastFixedSet<E> spawnEmptySet() {
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return new FastFixedSet<E>(this);
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}
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private int getDataLength() {
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return dataLength;
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}
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private VBStyleCollection<int[], E> getInternalValuesCollection() {
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return colValuesInternal;
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}
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public static class FastFixedSet<E> implements Iterable<E> {
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private FastFixedSetFactory<E> factory;
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private VBStyleCollection<int[], E> colValuesInternal;
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private int[] data;
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private FastFixedSet(FastFixedSetFactory<E> factory) {
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this.factory = factory;
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this.colValuesInternal = factory.getInternalValuesCollection();
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this.data = new int[factory.getDataLength()];
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}
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public FastFixedSet<E> getCopy() {
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FastFixedSet<E> copy = new FastFixedSet<E>(factory);
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int arrlength = data.length;
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int[] cpdata = new int[arrlength];
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System.arraycopy(data, 0, cpdata, 0, arrlength);
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copy.setData(cpdata);
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return copy;
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}
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public void setAllElements() {
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int[] lastindex = colValuesInternal.get(colValuesInternal.size() - 1);
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for (int i = lastindex[0] - 1; i >= 0; i--) {
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data[i] = 0xFFFFFFFF;
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}
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data[lastindex[0]] = lastindex[1] | (lastindex[1] - 1);
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}
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public void add(E element) {
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int[] index = colValuesInternal.getWithKey(element);
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data[index[0]] |= index[1];
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}
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public void addAll(Collection<E> set) {
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for (E element : set) {
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add(element);
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}
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}
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public void remove(E element) {
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int[] index = colValuesInternal.getWithKey(element);
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data[index[0]] &= ~index[1];
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}
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public void removeAll(Collection<E> set) {
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for (E element : set) {
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remove(element);
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}
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}
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public boolean contains(E element) {
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int[] index = colValuesInternal.getWithKey(element);
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return (data[index[0]] & index[1]) != 0;
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}
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public boolean contains(FastFixedSet<E> set) {
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int[] extdata = set.getData();
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int[] intdata = data;
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for (int i = intdata.length - 1; i >= 0; i--) {
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if ((extdata[i] & ~intdata[i]) != 0) {
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return false;
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}
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}
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return true;
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}
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public void union(FastFixedSet<E> set) {
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int[] extdata = set.getData();
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int[] intdata = data;
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for (int i = intdata.length - 1; i >= 0; i--) {
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intdata[i] |= extdata[i];
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}
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}
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public void intersection(FastFixedSet<E> set) {
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int[] extdata = set.getData();
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int[] intdata = data;
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for (int i = intdata.length - 1; i >= 0; i--) {
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intdata[i] &= extdata[i];
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}
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}
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public void symdiff(FastFixedSet<E> set) {
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int[] extdata = set.getData();
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int[] intdata = data;
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for (int i = intdata.length - 1; i >= 0; i--) {
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intdata[i] ^= extdata[i];
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}
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}
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public void complement(FastFixedSet<E> set) {
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int[] extdata = set.getData();
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int[] intdata = data;
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for (int i = intdata.length - 1; i >= 0; i--) {
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intdata[i] &= ~extdata[i];
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}
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}
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public boolean equals(Object o) {
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if (o == this) return true;
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if (o == null || !(o instanceof FastFixedSet)) return false;
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int[] extdata = ((FastFixedSet)o).getData();
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int[] intdata = data;
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for (int i = intdata.length - 1; i >= 0; i--) {
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if (intdata[i] != extdata[i]) {
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return false;
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}
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}
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return true;
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}
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public boolean isEmpty() {
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int[] intdata = data;
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for (int i = intdata.length - 1; i >= 0; i--) {
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if (intdata[i] != 0) {
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return false;
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}
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}
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return true;
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}
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public Iterator<E> iterator() {
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return new FastFixedSetIterator<E>(this);
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}
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public Set<E> toPlainSet() {
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return toPlainCollection(new HashSet<E>());
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}
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public List<E> toPlainList() {
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return toPlainCollection(new ArrayList<E>());
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}
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private <T extends Collection<E>> T toPlainCollection(T cl) {
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int[] intdata = data;
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for (int bindex = 0; bindex < intdata.length; bindex++) {
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int block = intdata[bindex];
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if (block != 0) {
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int index = bindex << 5; // * 32
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for (int i = 31; i >= 0; i--) {
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if ((block & 1) != 0) {
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cl.add(colValuesInternal.getKey(index));
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}
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index++;
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block >>>= 1;
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}
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}
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}
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return cl;
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}
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public String toBinary() {
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StringBuilder buffer = new StringBuilder();
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int[] intdata = data;
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for (int i = 0; i < intdata.length; i++) {
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buffer.append(" ").append(Integer.toBinaryString(intdata[i]));
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}
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return buffer.toString();
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}
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public String toString() {
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StringBuilder buffer = new StringBuilder("{");
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int[] intdata = data;
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boolean first = true;
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for (int i = colValuesInternal.size() - 1; i >= 0; i--) {
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int[] index = colValuesInternal.get(i);
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if ((intdata[index[0]] & index[1]) != 0) {
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if (first) {
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first = false;
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}
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else {
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buffer.append(",");
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}
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buffer.append(colValuesInternal.getKey(i));
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}
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}
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buffer.append("}");
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return buffer.toString();
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}
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private int[] getData() {
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return data;
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}
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private void setData(int[] data) {
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this.data = data;
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}
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public FastFixedSetFactory<E> getFactory() {
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return factory;
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}
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}
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public static class FastFixedSetIterator<E> implements Iterator<E> {
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private VBStyleCollection<int[], E> colValuesInternal;
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private int[] data;
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private int size;
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private int pointer = -1;
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private int next_pointer = -1;
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private FastFixedSetIterator(FastFixedSet<E> set) {
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colValuesInternal = set.getFactory().getInternalValuesCollection();
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data = set.getData();
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size = colValuesInternal.size();
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}
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private int getNextIndex(int index) {
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index++;
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int ret = index;
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int bindex = index / 32;
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int dindex = index % 32;
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while (bindex < data.length) {
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int block = data[bindex];
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if (block != 0) {
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block >>>= dindex;
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while (dindex < 32) {
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if ((block & 1) != 0) {
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return ret;
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}
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block >>>= 1;
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dindex++;
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ret++;
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}
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}
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else {
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ret += (32 - dindex);
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}
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dindex = 0;
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bindex++;
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}
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return -1;
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}
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public boolean hasNext() {
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next_pointer = getNextIndex(pointer);
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return (next_pointer >= 0);
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}
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public E next() {
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if (next_pointer >= 0) {
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pointer = next_pointer;
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}
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else {
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pointer = getNextIndex(pointer);
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if (pointer == -1) {
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pointer = size;
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}
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}
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next_pointer = -1;
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return pointer < size ? colValuesInternal.getKey(pointer) : null;
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}
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public void remove() {
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int[] index = colValuesInternal.get(pointer);
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data[index[0]] &= ~index[1];
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}
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}
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}
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