Yatopia/patches/server/0016-lithium-HashedList.patch
Ivan Pekov 784079fc31
optimizations (#297)
* Drop useless stuff

* Faster Random

* TE opts

* Patches.md

* More Faster Random

* Fix Build

* More Opts

* AirplaneLite

* Update README.md

removed TIC-TACS and adding AirplaneLite

* Add AirplaneLite to the update script

* Rebuild patches

* Make enchanting table ticking configurable

* AirplaneLite to commitUpstream.sh

* Use FastRandom on more places

Co-authored-by: Bud Gidiere <sgidiere@gmail.com>
Co-authored-by: Simon Gardling <Titaniumtown@gmail.com>
2020-11-30 20:08:41 -06:00

295 lines
7.5 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: JellySquid <jellysquid+atwork@protonmail.com>
Date: Fri, 31 Jul 2020 21:46:32 -0500
Subject: [PATCH] lithium HashedList
Original code by JellySquid, licensed under GNU Lesser General Public License v3.0
you can find the original code on https://github.com/jellysquid3/lithium-fabric/tree/1.16.x/fabric (Yarn mappings)
diff --git a/src/main/java/me/jellysquid/mods/lithium/common/util/collections/HashedList.java b/src/main/java/me/jellysquid/mods/lithium/common/util/collections/HashedList.java
new file mode 100644
index 0000000000000000000000000000000000000000..2d79932dbd1fc386a94b8d6ea3526934c54c2aad
--- /dev/null
+++ b/src/main/java/me/jellysquid/mods/lithium/common/util/collections/HashedList.java
@@ -0,0 +1,280 @@
+package me.jellysquid.mods.lithium.common.util.collections;
+
+import it.unimi.dsi.fastutil.objects.Reference2IntOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ReferenceArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.NoSuchElementException;
+
+/**
+ * Wraps a {@link List} with a hash table which provides O(1) lookups for {@link Collection#contains(Object)}. The type
+ * contained by this list must use reference-equality semantics.
+ */
+@SuppressWarnings("SuspiciousMethodCalls")
+public class HashedList<T> implements List<T> {
+ private final ReferenceArrayList<T> list;
+ private final Reference2IntOpenHashMap<T> counter;
+
+ public HashedList(List<T> list) {
+ this.list = new ReferenceArrayList<>();
+ this.list.addAll(list);
+
+ this.counter = new Reference2IntOpenHashMap<>();
+ this.counter.defaultReturnValue(0);
+
+ for (T obj : this.list) {
+ this.counter.addTo(obj, 1);
+ }
+ }
+
+ @Override
+ public int size() {
+ return this.list.size();
+ }
+
+ @Override
+ public boolean isEmpty() {
+ return this.list.isEmpty();
+ }
+
+ @Override
+ public boolean contains(Object o) {
+ return this.counter.containsKey(o);
+ }
+
+ @Override
+ public Iterator<T> iterator() {
+ return this.listIterator();
+ }
+
+ @Override
+ public Object[] toArray() {
+ return this.list.toArray();
+ }
+
+ @SuppressWarnings("SuspiciousToArrayCall")
+ @Override
+ public <T1> T1[] toArray(T1[] a) {
+ return this.list.toArray(a);
+ }
+
+ @Override
+ public boolean add(T t) {
+ this.trackReferenceAdded(t);
+
+ return this.list.add(t);
+ }
+
+ @Override
+ public boolean remove(Object o) {
+ this.trackReferenceRemoved(o);
+
+ return this.list.remove(o);
+ }
+
+ @Override
+ public boolean containsAll(Collection<?> c) {
+ for (Object obj : c) {
+ if (!this.counter.containsKey(obj)) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ @Override
+ public boolean addAll(Collection<? extends T> c) {
+ for (T obj : c) {
+ this.trackReferenceAdded(obj);
+ }
+
+ return this.list.addAll(c);
+ }
+
+ @Override
+ public boolean addAll(int index, Collection<? extends T> c) {
+ for (T obj : c) {
+ this.trackReferenceAdded(obj);
+ }
+
+ return this.list.addAll(index, c);
+ }
+
+ @Override
+ public boolean removeAll(Collection<?> c) {
+ for (Object obj : c) {
+ this.trackReferenceRemoved(obj);
+ }
+
+ return this.list.removeAll(c);
+ }
+
+ @Override
+ public boolean retainAll(Collection<?> c) {
+ return this.list.retainAll(c);
+ }
+
+ @Override
+ public void clear() {
+ this.counter.clear();
+ this.list.clear();
+ }
+
+ @Override
+ public T get(int index) {
+ return this.list.get(index);
+ }
+
+ @Override
+ public T set(int index, T element) {
+ T prev = this.list.set(index, element);
+
+ if (prev != element) {
+ if (prev != null) {
+ this.trackReferenceRemoved(prev);
+ }
+
+ this.trackReferenceAdded(element);
+ }
+
+ return prev;
+ }
+
+ @Override
+ public void add(int index, T element) {
+ this.trackReferenceAdded(element);
+
+ this.list.add(index, element);
+ }
+
+ @Override
+ public T remove(int index) {
+ T prev = this.list.remove(index);
+
+ if (prev != null) {
+ this.trackReferenceRemoved(prev);
+ }
+
+ return prev;
+ }
+
+ @Override
+ public int indexOf(Object o) {
+ return this.list.indexOf(o);
+ }
+
+ @Override
+ public int lastIndexOf(Object o) {
+ return this.list.lastIndexOf(o);
+ }
+
+ @Override
+ public ListIterator<T> listIterator() {
+ return this.listIterator(0);
+ }
+
+ @Override
+ public ListIterator<T> listIterator(int index) {
+ return new ListIterator<T>() {
+ private final ListIterator<T> inner = HashedList.this.list.listIterator(index);
+
+ @Override
+ public boolean hasNext() {
+ return this.inner.hasNext();
+ }
+
+ @Override
+ public T next() {
+ return this.inner.next();
+ }
+
+ @Override
+ public boolean hasPrevious() {
+ return this.inner.hasPrevious();
+ }
+
+ @Override
+ public T previous() {
+ return this.inner.previous();
+ }
+
+ @Override
+ public int nextIndex() {
+ return this.inner.nextIndex();
+ }
+
+ @Override
+ public int previousIndex() {
+ return this.inner.previousIndex();
+ }
+
+ @Override
+ public void remove() {
+ int last = this.previousIndex();
+
+ if (last == -1) {
+ throw new NoSuchElementException();
+ }
+
+ T prev = HashedList.this.get(last);
+
+ if (prev != null) {
+ HashedList.this.trackReferenceRemoved(prev);
+ }
+
+ this.inner.remove();
+ }
+
+ @Override
+ public void set(T t) {
+ int last = this.previousIndex();
+
+ if (last == -1) {
+ throw new NoSuchElementException();
+ }
+
+ T prev = HashedList.this.get(last);
+
+ if (prev != t) {
+ if (prev != null) {
+ HashedList.this.trackReferenceRemoved(prev);
+ }
+
+ HashedList.this.trackReferenceAdded(t);
+ }
+
+ this.inner.remove();
+ }
+
+ @Override
+ public void add(T t) {
+ HashedList.this.trackReferenceAdded(t);
+
+ this.inner.add(t);
+ }
+ };
+ }
+
+ @Override
+ public List<T> subList(int fromIndex, int toIndex) {
+ return this.list.subList(fromIndex, toIndex);
+ }
+
+ private void trackReferenceAdded(T t) {
+ this.counter.addTo(t, 1);
+ }
+
+ @SuppressWarnings("unchecked")
+ private void trackReferenceRemoved(Object o) {
+ if (this.counter.addTo((T) o, -1) <= 1) {
+ this.counter.removeInt(o);
+ }
+ }
+
+ public static <T> HashedList<T> wrapper(List<T> list) {
+ return new HashedList<>(list);
+ }
+}