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MiraiMC/patches/server/0014-Use-XoRoShiRoRandom.patch
Etil 91f40e0e2d Update Upstream (Pufferfish)
2022-01-12 13:38:39 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@gmail.com>
Date: Wed, 5 Jan 2022 12:25:37 -0500
Subject: [PATCH] Use XoRoShiRoRandom
Original code by Titaniumtown, licensed under GNU General Public License v3.0
You can find the original code on https://gitlab.com/Titaniumtown/JettPack
diff --git a/src/main/java/com/destroystokyo/paper/loottable/PaperLootableInventoryData.java b/src/main/java/com/destroystokyo/paper/loottable/PaperLootableInventoryData.java
index 20cfe7b9b7127ddeb97aa91d759fc17b4a548eaf..34665a768285fd99e49d57d3879deb1fe3c7df32 100644
--- a/src/main/java/com/destroystokyo/paper/loottable/PaperLootableInventoryData.java
+++ b/src/main/java/com/destroystokyo/paper/loottable/PaperLootableInventoryData.java
@@ -13,7 +13,7 @@ import java.util.UUID;
public class PaperLootableInventoryData {
- private static final Random RANDOM = new Random();
+ private static final Random RANDOM = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
private long lastFill = -1;
private long nextRefill = -1;
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 663ab7f3c2e7514c211f01114aa8869f24615da0..5830bda766ea88bb45096d900afe76600ce2f9e0 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -415,7 +415,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
this.onMetricsRecordingFinished = (path) -> {
};
this.status = new ServerStatus();
- this.random = new Random();
+ this.random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
this.port = -1;
this.levels = Maps.newLinkedHashMap(); // CraftBukkit - keep order, k+v already use identity methods
this.running = true;
diff --git a/src/main/java/net/minecraft/server/commands/SpreadPlayersCommand.java b/src/main/java/net/minecraft/server/commands/SpreadPlayersCommand.java
index 62f26f5d3ef5546f26424185e378fea64c08ce2f..54559b015813ca1c5dae9cb229a4a63f3bc3d47a 100644
--- a/src/main/java/net/minecraft/server/commands/SpreadPlayersCommand.java
+++ b/src/main/java/net/minecraft/server/commands/SpreadPlayersCommand.java
@@ -55,7 +55,7 @@ public class SpreadPlayersCommand {
}
private static int spreadPlayers(CommandSourceStack source, Vec2 center, float spreadDistance, float maxRange, int maxY, boolean respectTeams, Collection<? extends Entity> players) throws CommandSyntaxException {
- Random random = new Random();
+ Random random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
double d0 = (double) (center.x - maxRange);
double d1 = (double) (center.y - maxRange);
double d2 = (double) (center.x + maxRange);
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 7b23535a680d2a8534dcb8dd87770f66fb982c13..5e9c7f428e4a0d920569c2a02e999da910fc9397 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -368,7 +368,7 @@ public class ServerPlayer extends Player {
long l = k * k;
int i1 = l > 2147483647L ? Integer.MAX_VALUE : (int) l;
int j1 = this.getCoprime(i1);
- int k1 = (new Random()).nextInt(i1);
+ int k1 = (wtf.etil.mirai.server.util.XoRoShiRoRandom()).nextInt(i1); // JettPack
for (int l1 = 0; l1 < i1; ++l1) {
int i2 = (k1 + j1 * l1) % i1;
@@ -405,7 +405,7 @@ public class ServerPlayer extends Player {
long l = k * k;
int i1 = l > 2147483647L ? Integer.MAX_VALUE : (int) l;
int j1 = this.getCoprime(i1);
- int k1 = (new Random()).nextInt(i1);
+ int k1 = (wtf.etil.mirai.server.util.XoRoShiRoRandom()).nextInt(i1); // JettPack
for (int l1 = 0; l1 < i1; ++l1) {
int i2 = (k1 + j1 * l1) % i1;
diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 462d8c36166c63a4dc8fa74ac7f82859e6f4b83a..1be5ae3162f2e2b5a48310c162edf8bdc8a08c2b 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -52,7 +52,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener
private static final AtomicInteger UNIQUE_THREAD_ID = new AtomicInteger(0);
static final Logger LOGGER = LogManager.getLogger();
private static final int MAX_TICKS_BEFORE_LOGIN = 600;
- private static final Random RANDOM = new Random();
+ private static final Random RANDOM = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
private final byte[] nonce = new byte[4];
final MinecraftServer server;
public final Connection connection;
diff --git a/src/main/java/net/minecraft/server/rcon/thread/QueryThreadGs4.java b/src/main/java/net/minecraft/server/rcon/thread/QueryThreadGs4.java
index 25ae440839f1d286550a77d0a4c61e1dc02b369d..f42bce03c21309efbb208be21263b6c09927ed6c 100644
--- a/src/main/java/net/minecraft/server/rcon/thread/QueryThreadGs4.java
+++ b/src/main/java/net/minecraft/server/rcon/thread/QueryThreadGs4.java
@@ -348,7 +348,7 @@ public class QueryThreadGs4 extends GenericThread {
this.identBytes[2] = bs[5];
this.identBytes[3] = bs[6];
this.ident = new String(this.identBytes, StandardCharsets.UTF_8);
- this.challenge = (new Random()).nextInt(16777216);
+ this.challenge = (wtf.etil.mirai.server.util.XoRoShiRoRandom()).nextInt(16777216); // JettPack
this.challengeBytes = String.format("\t%s%d\u0000", this.ident, this.challenge).getBytes(StandardCharsets.UTF_8);
}
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java b/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
index 204ca4fbd89bdadd902529f1f191df46fce3cace..fa0845fffc358ae11dc81e6119afce8ffdc78571 100644
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
@@ -13,7 +13,7 @@ import java.util.stream.Stream;
public class ShufflingList<U> {
public final List<ShufflingList.WeightedEntry<U>> entries; // Paper - public
- private final Random random = new Random();
+ private final Random random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
private final boolean isUnsafe; // Paper
public ShufflingList() {
diff --git a/src/main/java/net/minecraft/world/entity/ai/sensing/Sensor.java b/src/main/java/net/minecraft/world/entity/ai/sensing/Sensor.java
index f3b8e253a5bfc3f68121dbe656ae7e2ac0f0eb1c..4b7dd3f2157d0f78bc35ec865555682d0f61445f 100644
--- a/src/main/java/net/minecraft/world/entity/ai/sensing/Sensor.java
+++ b/src/main/java/net/minecraft/world/entity/ai/sensing/Sensor.java
@@ -8,7 +8,7 @@ import net.minecraft.world.entity.ai.memory.MemoryModuleType;
import net.minecraft.world.entity.ai.targeting.TargetingConditions;
public abstract class Sensor<E extends LivingEntity> {
- private static final Random RANDOM = new Random();
+ private static final Random RANDOM = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
private static final int DEFAULT_SCAN_RATE = 20;
protected static final int TARGETING_RANGE = 16;
private static final TargetingConditions TARGET_CONDITIONS = TargetingConditions.forNonCombat().range(16.0D);
diff --git a/src/main/java/net/minecraft/world/entity/npc/WanderingTraderSpawner.java b/src/main/java/net/minecraft/world/entity/npc/WanderingTraderSpawner.java
index 323eea2bccacfcc85849b5d82c2b30d991e0c0d8..20668da3594346511b065146a2b7478c98283b9b 100644
--- a/src/main/java/net/minecraft/world/entity/npc/WanderingTraderSpawner.java
+++ b/src/main/java/net/minecraft/world/entity/npc/WanderingTraderSpawner.java
@@ -35,7 +35,7 @@ public class WanderingTraderSpawner implements CustomSpawner {
private static final int SPAWN_CHANCE_INCREASE = 25;
private static final int SPAWN_ONE_IN_X_CHANCE = 10;
private static final int NUMBER_OF_SPAWN_ATTEMPTS = 10;
- private final Random random = new Random();
+ private final Random random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
private final ServerLevelData serverLevelData;
private int tickDelay;
private int spawnDelay;
diff --git a/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java b/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
index 2015223c1703935faef52a8b88263ab3f1fbe92a..e34b4036a8a2efadd18f62c5037b75f6b59c53e0 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
@@ -76,7 +76,7 @@ public class FishingHook extends Projectile {
private FishingHook(EntityType<? extends FishingHook> type, Level world, int luckOfTheSeaLevel, int lureLevel) {
super(type, world);
- this.syncronizedRandom = new Random();
+ this.syncronizedRandom = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
this.openWater = true;
this.currentState = FishingHook.FishHookState.FLYING;
this.noCulling = true;
diff --git a/src/main/java/net/minecraft/world/entity/raid/Raid.java b/src/main/java/net/minecraft/world/entity/raid/Raid.java
index 7131226de05bc57830f7a68ba545ebfd19d33a59..9c14b6049f3b8109c42d3c8825c87ae43f981938 100644
--- a/src/main/java/net/minecraft/world/entity/raid/Raid.java
+++ b/src/main/java/net/minecraft/world/entity/raid/Raid.java
@@ -110,7 +110,7 @@ public class Raid {
public Raid(int id, ServerLevel world, BlockPos pos) {
this.raidEvent = new ServerBossEvent(Raid.RAID_NAME_COMPONENT, BossEvent.BossBarColor.RED, BossEvent.BossBarOverlay.NOTCHED_10);
- this.random = new Random();
+ this.random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
this.waveSpawnPos = Optional.empty();
this.id = id;
this.level = world;
@@ -124,7 +124,7 @@ public class Raid {
public Raid(ServerLevel world, CompoundTag nbt) {
this.raidEvent = new ServerBossEvent(Raid.RAID_NAME_COMPONENT, BossEvent.BossBarColor.RED, BossEvent.BossBarOverlay.NOTCHED_10);
- this.random = new Random();
+ this.random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
this.waveSpawnPos = Optional.empty();
this.level = world;
this.id = nbt.getInt("Id");
diff --git a/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java b/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
index d75f14e23d94deee2b6af20c8af3bcd42c1fbbc3..7c21d59bb9052d2e2c690f31a24277066c20f9b7 100644
--- a/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
@@ -68,7 +68,7 @@ public class EnchantmentMenu extends AbstractContainerMenu {
}
// CraftBukkit end
};
- this.random = new Random();
+ this.random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
this.enchantmentSeed = DataSlot.standalone();
this.costs = new int[3];
this.enchantClue = new int[]{-1, -1, -1};
diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java
index 03726227fdd60e9cf77213d50184abff438e01ef..8220cb49c2d4d46120615b298ce36d10b29dba6d 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -41,7 +41,7 @@ public abstract class BaseSpawner {
public int maxNearbyEntities = 6;
public int requiredPlayerRange = 16;
public int spawnRange = 4;
- private final Random random = new Random();
+ private final Random random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
private int tickDelay = 0; // Paper
public BaseSpawner() {}
diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java
index 97f99a06b8954b08af9f4156abe8abdad359349a..e0e27004d67fd759903645cff8a491e5516aeea8 100644
--- a/src/main/java/net/minecraft/world/level/Explosion.java
+++ b/src/main/java/net/minecraft/world/level/Explosion.java
@@ -89,7 +89,7 @@ public class Explosion {
}
public Explosion(Level world, @Nullable Entity entity, @Nullable DamageSource damageSource, @Nullable ExplosionDamageCalculator behavior, double x, double y, double z, float power, boolean createFire, Explosion.BlockInteraction destructionType) {
- this.random = new Random();
+ this.random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
this.toBlow = Lists.newArrayList();
this.hitPlayers = Maps.newHashMap();
this.level = world;
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 96c6ef03a64e425472c64884c91ac4951950362b..1b6fc6511c32e6509f773d5259e7a07c3b8e79bf 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -123,13 +123,13 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
public final Thread thread;
private final boolean isDebug;
private int skyDarken;
- protected int randValue = (new Random()).nextInt();
+ protected int randValue = (new wtf.etil.mirai.server.util.XoRoShiRoRandom()).nextInt(); // JettPack
protected final int addend = 1013904223;
protected float oRainLevel;
public float rainLevel;
protected float oThunderLevel;
public float thunderLevel;
- public final Random random = new Random();
+ public final Random random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
private final DimensionType dimensionType;
public final WritableLevelData levelData;
private final Supplier<ProfilerFiller> profiler;
diff --git a/src/main/java/net/minecraft/world/level/block/entity/DispenserBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/DispenserBlockEntity.java
index f74c5bb8e1ba42c77c59d481b871fd992483b128..5552b6ff8f673fb6846c730fed060ea5abf51867 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/DispenserBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/DispenserBlockEntity.java
@@ -21,7 +21,7 @@ import org.bukkit.entity.HumanEntity;
public class DispenserBlockEntity extends RandomizableContainerBlockEntity {
- private static final Random RANDOM = new Random();
+ private static final Random RANDOM = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
public static final int CONTAINER_SIZE = 9;
private NonNullList<ItemStack> items;
diff --git a/src/main/java/net/minecraft/world/level/storage/loot/LootContext.java b/src/main/java/net/minecraft/world/level/storage/loot/LootContext.java
index d33af84300db18ea2b71dba2c9ed43390a293500..e60d244c44396ec09ecff889d8b9543b7224ce1b 100644
--- a/src/main/java/net/minecraft/world/level/storage/loot/LootContext.java
+++ b/src/main/java/net/minecraft/world/level/storage/loot/LootContext.java
@@ -201,7 +201,7 @@ public class LootContext {
} else {
Random random = this.random;
if (random == null) {
- random = new Random();
+ random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
}
MinecraftServer minecraftServer = this.level.getServer();
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index c28f7074a07051ea9aee5dc67dfef9193426a42d..7ca746e36a98e0b7d7e47c68962975242c4dd070 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -229,7 +229,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
}
// Paper end
- private static final Random rand = new Random();
+ private static final Random rand = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
public CraftWorld(ServerLevel world, ChunkGenerator gen, BiomeProvider biomeProvider, Environment env) {
this.world = world;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
index be86114eac3975b82ca74d4d6ed3f0402a642e8a..9120c11c2c37252c41835536d581d51f8e9f9ef7 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
@@ -13,7 +13,7 @@ import org.bukkit.inventory.meta.FireworkMeta;
public class CraftFirework extends CraftProjectile implements Firework {
- private final Random random = new Random();
+ private final Random random = new wtf.etil.mirai.server.util.XoRoShiRoRandom(); // JettPack
private final CraftItemStack item;
public CraftFirework(CraftServer server, FireworkRocketEntity entity) {
diff --git a/src/main/java/wtf/etil/mirai/server/util/SplitMixRandom.java b/src/main/java/wtf/etil/mirai/server/util/SplitMixRandom.java
new file mode 100644
index 0000000000000000000000000000000000000000..57fe47e8d93e61c457f888559bbc7e840e0461ca
--- /dev/null
+++ b/src/main/java/wtf/etil/mirai/server/util/SplitMixRandom.java
@@ -0,0 +1,38 @@
+package wtf.etil.mirai.server.util;
+
+import it.unimi.dsi.fastutil.HashCommon;
+
+/*
+Note, this implementation was taken from sodium under the LGPLv3 License: https://github.com/CaffeineMC/sodium-fabric/blob/6390562feee9537461a7822b43d2f87691378e55/src/main/java/me/jellysquid/mods/sodium/client/util/rand/XoRoShiRoRandom.java
+SplitMixRandom implementation from DSI Utilities, adopted in a minimal implementation to not import Apache Commons.
+
+http://xoshiro.di.unimi.it/
+*/
+public class SplitMixRandom {
+ private static final long PHI = 0x9E3779B97F4A7C15L;
+
+ private long x;
+
+ public SplitMixRandom(final long seed) {
+ this.setSeed(seed);
+ }
+
+ private static long staffordMix13(long z) {
+ z = (z ^ (z >>> 30)) * 0xBF58476D1CE4E5B9L;
+ z = (z ^ (z >>> 27)) * 0x94D049BB133111EBL;
+
+ return z ^ (z >>> 31);
+ }
+
+ public long nextLong() {
+ return staffordMix13(this.x += PHI);
+ }
+
+ public void setSeed(final long seed) {
+ this.x = HashCommon.murmurHash3(seed);
+ }
+
+ public void setState(final long state) {
+ this.x = state;
+ }
+}
\ No newline at end of file
diff --git a/src/main/java/wtf/etil/mirai/server/util/XoRoShiRoRandom.java b/src/main/java/wtf/etil/mirai/server/util/XoRoShiRoRandom.java
new file mode 100644
index 0000000000000000000000000000000000000000..c880f054d784e5e20ee656c81b1c4e55cb9e76d2
--- /dev/null
+++ b/src/main/java/wtf/etil/mirai/server/util/XoRoShiRoRandom.java
@@ -0,0 +1,154 @@
+package wtf.etil.mirai.server.util;
+
+import java.util.Random;
+
+/*
+Note, this implementation was taken from sodium under the LGPLv3 License: https://github.com/CaffeineMC/sodium-fabric/blob/6390562feee9537461a7822b43d2f87691378e55/src/main/java/me/jellysquid/mods/sodium/client/util/rand/XoRoShiRoRandom.java
+
+XoRoShiRo128** implementation from DSI Utilities, adopted in a minimal implementation to not import Apache Commons.
+
+http://xoshiro.di.unimi.it/
+*/
+public class XoRoShiRoRandom extends Random {
+ private static final long serialVersionUID = 1L;
+
+ private SplitMixRandom mixer;
+ private long seed = Long.MIN_VALUE;
+ private long p0, p1; // The initialization words for the current seed
+ private long s0, s1; // The current random words
+ private boolean hasSavedState; // True if we can be quickly reseed by using resetting the words
+
+ private static final SplitMixRandom seedUniquifier = new SplitMixRandom(System.nanoTime());
+
+ public static long randomSeed() {
+ final long x;
+
+ synchronized (XoRoShiRoRandom.seedUniquifier) {
+ x = XoRoShiRoRandom.seedUniquifier.nextLong();
+ }
+
+ return x ^ System.nanoTime();
+ }
+
+ public XoRoShiRoRandom() {
+ this(XoRoShiRoRandom.randomSeed());
+ }
+
+ public XoRoShiRoRandom(final long seed) {
+ this.setSeed(seed);
+ }
+
+ @Override
+ public long nextLong() {
+ final long s0 = this.s0;
+
+ long s1 = this.s1;
+
+ final long result = s0 + s1;
+
+ s1 ^= s0;
+
+ this.s0 = Long.rotateLeft(s0, 24) ^ s1 ^ s1 << 16;
+ this.s1 = Long.rotateLeft(s1, 37);
+
+ return result;
+ }
+
+ @Override
+ public int nextInt() {
+ return (int) this.nextLong();
+ }
+
+ @Override
+ public int nextInt(final int n) {
+ return (int) this.nextLong(n);
+ }
+
+ @Override
+ public long nextLong(final long n) {
+ if (n <= 0) {
+ throw new IllegalArgumentException("illegal bound " + n + " (must be positive)");
+ }
+
+ long t = this.nextLong();
+
+ final long nMinus1 = n - 1;
+
+ // Shortcut for powers of two--high bits
+ if ((n & nMinus1) == 0) {
+ return (t >>> Long.numberOfLeadingZeros(nMinus1)) & nMinus1;
+ }
+
+ // Rejection-based algorithm to get uniform integers in the general case
+ long u = t >>> 1;
+
+ while (u + nMinus1 - (t = u % n) < 0) {
+ u = this.nextLong() >>> 1;
+ }
+
+ return t;
+
+ }
+
+ @Override
+ public double nextDouble() {
+ return Double.longBitsToDouble(0x3FFL << 52 | this.nextLong() >>> 12) - 1.0;
+ }
+
+ @Override
+ public float nextFloat() {
+ return (this.nextLong() >>> 40) * 0x1.0p-24f;
+ }
+
+ @Override
+ public boolean nextBoolean() {
+ return this.nextLong() < 0;
+ }
+
+ @Override
+ public void nextBytes(final byte[] bytes) {
+ int i = bytes.length, n;
+
+ while (i != 0) {
+ n = Math.min(i, 8);
+
+ for (long bits = this.nextLong(); n-- != 0; bits >>= 8) {
+ bytes[--i] = (byte) bits;
+ }
+ }
+ }
+
+ @Override
+ public void setSeed(final long seed) {
+ // Restore the previous initial state if the seed hasn't changed
+ // Setting and mixing the seed is expensive, so this saves some CPU cycles
+ if (this.hasSavedState && this.seed == seed) {
+ this.s0 = this.p0;
+ this.s1 = this.p1;
+ } else {
+ SplitMixRandom mixer = this.mixer;
+
+ // Avoid allocations of SplitMixRandom
+ if (mixer == null) {
+ mixer = this.mixer = new SplitMixRandom(seed);
+ } else {
+ mixer.setSeed(seed);
+ }
+
+ this.s0 = mixer.nextLong();
+ this.s1 = mixer.nextLong();
+
+ this.p0 = this.s0;
+ this.p1 = this.s1;
+
+ this.seed = seed;
+ this.hasSavedState = true;
+ }
+ }
+
+ public XoRoShiRoRandom setSeedAndReturn(final long seed) {
+ this.setSeed(seed);
+
+ return this;
+ }
+}
\ No newline at end of file
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