Start singleplayer, 16 errors

.idea/misc.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_18" default="true" project-jdk-name="corretto-18" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="corretto-18" project-jdk-type="JavaSDK" />
 </project>

build.gradle

@@ -10,7 +10,7 @@ sourceSets {
         java {
             srcDirs(
                 "src/main/java",
-                "src/teavm/java"
+                "src/lwjgl/java"
             )
         }
     }
@@ -25,10 +25,10 @@ tasks.withType(JavaCompile) {
     options.compilerArgs << "-Xmaxerrs" << "1000"
 }
 
-//sourceSets.main.resources.srcDirs += 'src/lwjgl/java/javazoom/jl/decoder'
+sourceSets.main.resources.srcDirs += 'src/lwjgl/java/javazoom/jl/decoder'
 
 dependencies {
-    //implementation fileTree(dir: './lwjgl-rundir/', include: '*.jar')
+    implementation fileTree(dir: './lwjgl-rundir/', include: '*.jar')
 
     teavm(teavm.libs.jso)
     teavm(teavm.libs.jsoApis)

src/main/java/net/lax1dude/eaglercraft/sp/BooleanResult.java

@@ -0,0 +1,18 @@
+package net.lax1dude.eaglercraft.sp;
+
+public class BooleanResult {
+	
+	public static final BooleanResult TRUE = new BooleanResult(true);
+	public static final BooleanResult FALSE = new BooleanResult(false);
+	
+	public final boolean bool;
+	
+	private BooleanResult(boolean b) {
+		bool = b;
+	}
+	
+	public static BooleanResult _new(boolean b) {
+		return b ? TRUE : FALSE;
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/CRC32.java

@@ -0,0 +1,39 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.util.zip.Checksum;
+
+public class CRC32 implements Checksum {
+	private com.jcraft.jzlib.CRC32 impl = new com.jcraft.jzlib.CRC32();
+	long tbytes;
+
+	@Override
+	public long getValue() {
+		return impl.getValue();
+	}
+
+	@Override
+	public void reset() {
+		impl.reset();
+		tbytes = 0;
+	}
+
+	@Override
+	public void update(int val) {
+		impl.update(new byte[] { (byte) val }, 0, 1);
+	}
+
+	public void update(byte[] buf) {
+		update(buf, 0, buf.length);
+	}
+
+	@Override
+	public void update(byte[] buf, int off, int nbytes) {
+		// avoid int overflow, check null buf
+		if (off <= buf.length && nbytes >= 0 && off >= 0 && buf.length - off >= nbytes) {
+			impl.update(buf, off, nbytes);
+			tbytes += nbytes;
+		} else {
+			throw new ArrayIndexOutOfBoundsException();
+		}
+	}
+}

src/main/java/net/lax1dude/eaglercraft/sp/EAGLogAgent.java

@@ -0,0 +1,45 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import net.minecraft.src.ILogAgent;
+
+public class EAGLogAgent implements ILogAgent {
+	
+	private final Logger logger = Logger.getLogger("IntegratedServer");
+
+	public Logger getServerLogger() {
+		return this.logger;
+	}
+
+	public void logInfo(String par1Str) {
+		this.logger.log(Level.INFO, par1Str);
+	}
+
+	public void logWarning(String par1Str) {
+		this.logger.log(Level.WARNING, par1Str);
+	}
+
+	public void logWarningFormatted(String par1Str, Object... par2ArrayOfObj) {
+		this.logger.log(Level.WARNING, par1Str, par2ArrayOfObj);
+	}
+
+	public void logWarningException(String par1Str, Throwable par2Throwable) {
+		this.logger.log(Level.WARNING, par1Str, par2Throwable);
+	}
+
+	public void logSevere(String par1Str) {
+		this.logger.log(Level.SEVERE, par1Str);
+	}
+
+	public void logSevereException(String par1Str, Throwable par2Throwable) {
+		this.logger.log(Level.SEVERE, par1Str, par2Throwable);
+	}
+
+	@Override
+	public void logFine(String var1) {
+		this.logger.log(Level.FINE, var1);
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/EAGMinecraftServer.java

@@ -0,0 +1,158 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.IOException;
+
+import net.lax1dude.eaglercraft.sp.ipc.IPCPacket14StringList;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.src.EnumGameType;
+import net.minecraft.src.ILogAgent;
+import net.minecraft.src.WorldSettings;
+
+public class EAGMinecraftServer extends MinecraftServer {
+	
+	protected int difficulty;
+	protected EnumGameType gamemode;
+	protected long lastTick;
+	protected WorkerListenThread listenThreadImpl;
+	protected WorldSettings newWorldSettings;
+	protected boolean paused;
+	private int tpsCounter = 0;
+	private int tpsMeasure = 0;
+	private long tpsTimer = 0l;
+
+	public EAGMinecraftServer(String world, String owner, WorldSettings currentWorldSettings) {
+		super(world);
+		this.setServerOwner(owner);
+		System.out.println("server owner: " + owner);
+		this.setConfigurationManager(new EAGPlayerList(this));
+		this.listenThreadImpl = new WorkerListenThread(this);
+		this.newWorldSettings = currentWorldSettings;
+		this.paused = false;
+	}
+	
+	public void setBaseServerProperties(int difficulty, EnumGameType gamemode) {
+		this.difficulty = difficulty;
+		this.gamemode = gamemode;
+		this.setCanSpawnAnimals(true);
+		this.setCanSpawnNPCs(true);
+		this.setAllowPvp(true);
+		this.setAllowFlight(true);
+	}
+	
+	public void mainLoop() {
+		long ctm = SysUtil.steadyTimeMillis();
+		
+		long elapsed = ctm - tpsTimer;
+		if(elapsed >= 1000l) {
+			tpsTimer = ctm;
+			tpsMeasure = tpsCounter;
+			IntegratedServer.sendIPCPacket(new IPCPacket14StringList(IPCPacket14StringList.SERVER_TPS, getTPSAndChunkBuffer(tpsMeasure)));
+			tpsCounter = 0;
+		}
+		
+		if(paused && this.playersOnline.size() <= 1) {
+			lastTick = ctm;
+			return;
+		}
+		
+		long delta = ctm - lastTick;
+		
+		if (delta > 2000L && ctm - this.timeOfLastWarning >= 15000L) {
+			this.getLogAgent().logWarning("Can\'t keep up! Did the system time change, or is the server overloaded? Skipping " + ((delta - 2000l) / 50l) + " ticks");
+			delta = 2000L;
+			this.timeOfLastWarning = ctm;
+		}
+
+		if (delta < 0L) {
+			this.getLogAgent().logWarning("Time ran backwards! Did the fucking system time change?");
+			delta = 0L;
+		}
+		
+		if (this.worldServers[0].areAllPlayersAsleep()) {
+			this.tick();
+			++tpsCounter;
+			lastTick = SysUtil.steadyTimeMillis();
+		} else {
+			if (delta > 50l) {
+				delta -= 50L;
+				lastTick += 50l;
+				this.tick();
+				++tpsCounter;
+			}
+		}
+		
+	}
+	
+	public void setPaused(boolean p) {
+		paused = p;
+		if(!p) {
+			lastTick = SysUtil.steadyTimeMillis();
+		}
+	}
+	
+	public boolean getPaused() {
+		return paused;
+	}
+
+	@Override
+	protected boolean startServer() throws IOException {
+		SkinsPlugin.reset();
+		//VoiceChatPlugin.reset();
+		this.loadAllWorlds(folderName, 0l, newWorldSettings);
+		this.lastTick = SysUtil.steadyTimeMillis();
+		return true;
+	}
+
+	@Override
+	public void stopServer() {
+		super.stopServer();
+		SkinsPlugin.reset();
+		//VoiceChatPlugin.reset();
+	}
+
+	@Override
+	public boolean canStructuresSpawn() {
+		return false;
+	}
+
+	@Override
+	public EnumGameType getGameType() {
+		return gamemode;
+	}
+
+	@Override
+	public int getDifficulty() {
+		return difficulty;
+	}
+
+	@Override
+	public boolean isHardcore() {
+		return false;
+	}
+
+	@Override
+	public boolean isDedicatedServer() {
+		return false;
+	}
+
+	@Override
+	public boolean isCommandBlockEnabled() {
+		return true;
+	}
+
+	@Override
+	public WorkerListenThread getNetworkThread() {
+		return listenThreadImpl;
+	}
+
+	@Override
+	public String shareToLAN(EnumGameType var1, boolean var2) {
+		return null;
+	}
+
+	@Override
+	public ILogAgent getLogAgent() {
+		return IntegratedServer.logger;
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/EAGPlayerList.java

@@ -0,0 +1,28 @@
+package net.lax1dude.eaglercraft.sp;
+
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.src.EntityPlayerMP;
+import net.minecraft.src.NBTTagCompound;
+import net.minecraft.src.ServerConfigurationManager;
+
+public class EAGPlayerList extends ServerConfigurationManager {
+	
+	private NBTTagCompound hostPlayerNBT = null;
+
+	public EAGPlayerList(MinecraftServer par1MinecraftServer) {
+		super(par1MinecraftServer);
+		this.viewDistance = 4;
+	}
+
+	protected void writePlayerData(EntityPlayerMP par1EntityPlayerMP) {
+		if (par1EntityPlayerMP.getCommandSenderName().equals(this.getServerInstance().getServerOwner())) {
+			this.hostPlayerNBT = new NBTTagCompound();
+			par1EntityPlayerMP.writeToNBT(hostPlayerNBT);
+		}
+		super.writePlayerData(par1EntityPlayerMP);
+	}
+	
+	public NBTTagCompound getHostPlayerData() {
+		return this.hostPlayerNBT;
+	}
+}

src/main/java/net/lax1dude/eaglercraft/sp/EPK2Compiler.java

@@ -0,0 +1,151 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import com.jcraft.jzlib.CRC32;
+
+public class EPK2Compiler {
+	
+	private final ByteArrayOutputStream os;
+	private final CRC32 checkSum = new CRC32();
+	private int lengthIntegerOffset = 0;
+	private int totalFileCount = 0;
+
+	public EPK2Compiler(String name, String owner, String type) {
+		os = new ByteArrayOutputStream(0x200000);
+		try {
+			
+			os.write(new byte[]{(byte)69,(byte)65,(byte)71,(byte)80,(byte)75,(byte)71,(byte)36,(byte)36}); // EAGPKG$$
+			os.write(new byte[]{(byte)6,(byte)118,(byte)101,(byte)114,(byte)50,(byte)46,(byte)48}); // 6 + ver2.0
+			Date d = new Date();
+			
+			byte[] filename = (name + ".epk").getBytes(StandardCharsets.UTF_8);
+			os.write(filename.length);
+			os.write(filename);
+			
+			byte[] comment = ("\n\n #  Eagler EPK v2.0 (c) " + (new SimpleDateFormat("yyyy")).format(d) + " " +
+					owner + "\n #  export: on " + (new SimpleDateFormat("MM/dd/yyyy")).format(d) + " at " +
+					(new SimpleDateFormat("hh:mm:ss aa")).format(d) + "\n\n #  world name: " + name + "\n\n")
+					.getBytes(StandardCharsets.UTF_8);
+
+			os.write((comment.length >> 8) & 255);
+			os.write(comment.length & 255);
+			os.write(comment);
+			
+			writeLong(d.getTime(), os);
+			
+			lengthIntegerOffset = os.size();
+			os.write(new byte[]{(byte)255,(byte)255,(byte)255,(byte)255}); // this will be replaced with the file count
+			
+			os.write('0'); // compression type: none
+			
+			os.write(new byte[]{(byte)72,(byte)69,(byte)65,(byte)68}); // HEAD
+			os.write(new byte[]{(byte)9,(byte)102,(byte)105,(byte)108,(byte)101,(byte)45,(byte)116,(byte)121,
+					(byte)112,(byte)101}); // 9 + file-type
+			
+			byte[] typeBytes = type.getBytes(StandardCharsets.UTF_8);
+			writeInt(typeBytes.length, os);
+			os.write(typeBytes); // write type
+			os.write('>');
+			
+			++totalFileCount;
+			
+			os.write(new byte[]{(byte)72,(byte)69,(byte)65,(byte)68}); // HEAD
+			os.write(new byte[]{(byte)10,(byte)119,(byte)111,(byte)114,(byte)108,(byte)100,(byte)45,(byte)110,
+					(byte)97,(byte)109,(byte)101}); // 10 + world-name
+			
+			byte[] nameBytes = name.getBytes(StandardCharsets.UTF_8);
+			writeInt(nameBytes.length, os);
+			os.write(nameBytes); // write name
+			os.write('>');
+			
+			++totalFileCount;
+			
+			os.write(new byte[]{(byte)72,(byte)69,(byte)65,(byte)68}); // HEAD
+			os.write(new byte[]{(byte)11,(byte)119,(byte)111,(byte)114,(byte)108,(byte)100,(byte)45,(byte)111,
+					(byte)119,(byte)110,(byte)101,(byte)114}); // 11 + world-owner
+			
+			byte[] ownerBytes = owner.getBytes(StandardCharsets.UTF_8);
+			writeInt(ownerBytes.length, os);
+			os.write(ownerBytes); // write owner
+			os.write('>');
+			
+			++totalFileCount;
+			
+		}catch(IOException ex) {
+			throw new RuntimeException("This happened somehow", ex);
+		}
+	}
+	
+	public void append(String name, byte[] dat) {
+		try {
+			
+			checkSum.reset();
+			checkSum.update(dat, 0, dat.length);
+			long sum = checkSum.getValue();
+			
+			os.write(new byte[]{(byte)70,(byte)73,(byte)76,(byte)69}); // FILE
+			
+			byte[] nameBytes = name.getBytes(StandardCharsets.UTF_8);
+			os.write(nameBytes.length);
+			os.write(nameBytes);
+			
+			writeInt(dat.length + 5, os);
+			writeInt((int)sum, os);
+			
+			os.write(dat);
+			
+			os.write(':');
+			os.write('>');
+			
+			++totalFileCount;
+			
+		}catch(IOException ex) {
+			throw new RuntimeException("This happened somehow", ex);
+		}
+	}
+	
+	public byte[] complete() {
+		try {
+			
+			os.write(new byte[]{(byte)69,(byte)78,(byte)68,(byte)36}); // END$
+			os.write(new byte[]{(byte)58,(byte)58,(byte)58,(byte)89,(byte)69,(byte)69,(byte)58,(byte)62}); // :::YEE:>
+			
+			byte[] ret = os.toByteArray();
+
+			ret[lengthIntegerOffset] = (byte)((totalFileCount >> 24) & 0xFF);
+			ret[lengthIntegerOffset + 1] = (byte)((totalFileCount >> 16) & 0xFF);
+			ret[lengthIntegerOffset + 2] = (byte)((totalFileCount >> 8) & 0xFF);
+			ret[lengthIntegerOffset + 3] = (byte)(totalFileCount & 0xFF);
+			
+			return ret;
+			
+		}catch(IOException ex) {
+			throw new RuntimeException("This happened somehow", ex);
+		}
+	}
+	
+	public static void writeInt(int i, OutputStream os) throws IOException {
+		os.write((i >> 24) & 0xFF);
+		os.write((i >> 16) & 0xFF);
+		os.write((i >> 8) & 0xFF);
+		os.write(i & 0xFF);
+	}
+	
+	public static void writeLong(long i, OutputStream os) throws IOException {
+		os.write((int)((i >> 56) & 0xFF));
+		os.write((int)((i >> 48) & 0xFF));
+		os.write((int)((i >> 40) & 0xFF));
+		os.write((int)((i >> 32) & 0xFF));
+		os.write((int)((i >> 24) & 0xFF));
+		os.write((int)((i >> 16) & 0xFF));
+		os.write((int)((i >> 8) & 0xFF));
+		os.write((int)(i & 0xFF));
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/EPKDecompiler.java

@@ -0,0 +1,217 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+
+import com.jcraft.jzlib.CRC32;
+import com.jcraft.jzlib.GZIPInputStream;
+import com.jcraft.jzlib.InflaterInputStream;
+
+public class EPKDecompiler {
+	
+	public static class FileEntry {
+		public final String type;
+		public final String name;
+		public final byte[] data;
+		protected FileEntry(String type, String name, byte[] data) {
+			this.type = type;
+			this.name = name;
+			this.data = data;
+		}
+	}
+	
+	private ByteArrayInputStream in2;
+	private DataInputStream in;
+	private InputStream zis;
+	private SHA1Digest dg;
+	private CRC32 crc32;
+	private int numFiles;
+	private boolean isFinished = false;
+	private boolean isOldFormat = false;
+	
+	public EPKDecompiler(byte[] data) throws IOException {
+		in2 = new ByteArrayInputStream(data);
+		
+		byte[] header = new byte[8];
+		in2.read(header);
+		
+		if(Arrays.equals(header, new byte[]{(byte)69,(byte)65,(byte)71,(byte)80,(byte)75,(byte)71,(byte)36,(byte)36})) {
+			byte[] endCode = new byte[] { (byte)':', (byte)':', (byte)':', (byte)'Y',
+					(byte)'E', (byte)'E', (byte)':', (byte)'>' };
+			for(int i = 0; i < 8; ++i) {
+				if(data[data.length - 8 + i] != endCode[i]) {
+					throw new IOException("EPK file is missing EOF code (:::YEE:>)");
+				}
+			}
+			in2 = new ByteArrayInputStream(data, 8, data.length - 16);
+			initNew();
+		}else if(Arrays.equals(header, new byte[]{(byte)69,(byte)65,(byte)71,(byte)80,(byte)75,(byte)71,(byte)33,(byte)33})) {
+			initOld();
+		}
+		
+	}
+	
+	public boolean isOld() {
+		return isOldFormat;
+	}
+	
+	public FileEntry readFile() throws IOException {
+		if(!isOldFormat) {
+			return readFileNew();
+		}else {
+			return readFileOld();
+		}
+	}
+	
+	private void initNew() throws IOException {
+		InputStream is = in2;
+		
+		String vers = readASCII(is);
+		if(!vers.startsWith("ver2.")) {
+			throw new IOException("Unknown or invalid EPK version: " + vers);
+		}
+		
+		is.skip(is.read()); // skip filename
+		is.skip(loadShort(is)); // skip comment
+		is.skip(8); // skip millis date
+		
+		numFiles = loadInt(is);
+		
+		char compressionType = (char)is.read();
+		
+		switch(compressionType) {
+		case 'G':
+			zis = new GZIPInputStream(is);
+			break;
+		case 'Z':
+			zis = new InflaterInputStream(is);
+			break;
+		case '0':
+			zis = is;
+			break;
+		default:
+			throw new IOException("Invalid or unsupported EPK compression: " + compressionType);
+		}
+		
+		crc32 = new CRC32();
+		
+	}
+	
+	private FileEntry readFileNew() throws IOException {
+		if(isFinished) {
+			return null;
+		}
+		
+		byte[] typeBytes = new byte[4];
+		zis.read(typeBytes);
+		String type = readASCII(typeBytes);
+		
+		if(numFiles == 0) {
+			if(!"END$".equals(type)) {
+				throw new IOException("EPK file is missing END code (END$)");
+			}
+			isFinished = true;
+			return null;
+		}else {
+			if("END$".equals(type)) {
+				throw new IOException("Unexpected END when there are still " + numFiles + " files remaining");
+			}else {
+				String name = readASCII(zis);
+				int len = loadInt(zis);
+				byte[] data;
+				
+				if("FILE".equals(type)) {
+					if(len < 5) {
+						throw new IOException("File '" + name + "' is incomplete (no crc)");
+					}
+					
+					int loadedCrc = loadInt(zis);
+					
+					data = new byte[len - 5];
+					zis.read(data);
+					
+					crc32.reset();
+					crc32.update(data, 0, data.length);
+					if((int)crc32.getValue() != loadedCrc) {
+						throw new IOException("File '" + name + "' has an invalid checksum");
+					}
+					
+					if(zis.read() != ':') {
+						throw new IOException("File '" + name + "' is incomplete");
+					}
+				}else {
+					data = new byte[len];
+					zis.read(data);
+				}
+				
+				if(zis.read() != '>') {
+					throw new IOException("Object '" + name + "' is incomplete");
+				}
+				
+				--numFiles;
+				return new FileEntry(type, name, data);
+			}
+		}
+	}
+	
+	private static final int loadShort(InputStream is) throws IOException {
+		return (is.read() << 8) | is.read();
+	}
+	
+	private static final int loadInt(InputStream is) throws IOException {
+		return (is.read() << 24) | (is.read() << 16) | (is.read() << 8) | is.read();
+	}
+	
+	public static final String readASCII(byte[] bytesIn) throws IOException {
+		char[] charIn = new char[bytesIn.length];
+		for(int i = 0; i < bytesIn.length; ++i) {
+			charIn[i] = (char)((int)bytesIn[i] & 0xFF);
+		}
+		return new String(charIn);
+	}
+	
+	private static final String readASCII(InputStream bytesIn) throws IOException {
+		int len = bytesIn.read();
+		char[] charIn = new char[len];
+		for(int i = 0; i < len; ++i) {
+			charIn[i] = (char)(bytesIn.read() & 0xFF);
+		}
+		return new String(charIn);
+	}
+	
+	private void initOld() throws IOException {
+		isOldFormat = true;
+		dg = new SHA1Digest();
+		in = new DataInputStream(in2);
+		in.readUTF();
+		in = new DataInputStream(new InflaterInputStream(in2));
+	}
+	
+	private FileEntry readFileOld() throws IOException {
+		if(isFinished) {
+			return null;
+		}
+		String s = in.readUTF();
+		if(s.equals(" end")) {
+			isFinished = true;
+			return null;
+		}else if(!s.equals("<file>")) {
+			throw new IOException("invalid epk file");
+		}
+		String path = in.readUTF();
+		byte[] digest = new byte[20];
+		byte[] digest2 = new byte[20];
+		in.read(digest);
+		int len = in.readInt();
+		byte[] file = new byte[len];
+		in.read(file);
+		dg.update(file, 0, len); dg.doFinal(digest2, 0);
+		if(!Arrays.equals(digest, digest2)) throw new IOException("invalid file hash for "+path);
+		if(!"</file>".equals(in.readUTF())) throw new IOException("invalid epk file");
+		return new FileEntry("FILE", path, file);
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/EaglerUUID.java

@@ -0,0 +1,189 @@
+package net.lax1dude.eaglercraft.sp;
+
+public class EaglerUUID {
+	
+    private final long mostSigBits;
+    private final long leastSigBits;
+    
+    private EaglerUUID(byte[] data) {
+        long msb = 0;
+        long lsb = 0;
+        assert data.length == 16 : "data must be 16 bytes in length";
+        for (int i=0; i<8; i++)
+            msb = (msb << 8) | (data[i] & 0xff);
+        for (int i=8; i<16; i++)
+            lsb = (lsb << 8) | (data[i] & 0xff);
+        this.mostSigBits = msb;
+        this.leastSigBits = lsb;
+    }
+    
+    public EaglerUUID(long mostSigBits, long leastSigBits) {
+        this.mostSigBits = mostSigBits;
+        this.leastSigBits = leastSigBits;
+    }
+    
+    private static final EaglercraftRandom random = new EaglercraftRandom();
+    
+    public static EaglerUUID randomUUID() {
+        byte[] randomBytes = new byte[16];
+        random.nextBytes(randomBytes);
+        randomBytes[6]  &= 0x0f;  /* clear version        */
+        randomBytes[6]  |= 0x40;  /* set to version 4     */
+        randomBytes[8]  &= 0x3f;  /* clear variant        */
+        randomBytes[8]  |= 0x80;  /* set to IETF variant  */
+        return new EaglerUUID(randomBytes);
+    }
+    
+    private static final MD5Digest yee = new MD5Digest();
+    
+    public static EaglerUUID nameUUIDFromBytes(byte[] name) {
+    	yee.update(name, 0, name.length);
+        byte[] md5Bytes = new byte[16];
+        yee.doFinal(md5Bytes, 0);
+        md5Bytes[6]  &= 0x0f;  /* clear version        */
+        md5Bytes[6]  |= 0x30;  /* set to version 3     */
+        md5Bytes[8]  &= 0x3f;  /* clear variant        */
+        md5Bytes[8]  |= 0x80;  /* set to IETF variant  */
+        return new EaglerUUID(md5Bytes);
+    }
+    
+    public static EaglerUUID fromString(String name) {
+        String[] components = name.split("-");
+        if (components.length != 5)
+            throw new IllegalArgumentException("Invalid UUID string: "+name);
+        for (int i=0; i<5; i++)
+            components[i] = "0x"+components[i];
+
+        long mostSigBits = Long.decode(components[0]).longValue();
+        mostSigBits <<= 16;
+        mostSigBits |= Long.decode(components[1]).longValue();
+        mostSigBits <<= 16;
+        mostSigBits |= Long.decode(components[2]).longValue();
+
+        long leastSigBits = Long.decode(components[3]).longValue();
+        leastSigBits <<= 48;
+        leastSigBits |= Long.decode(components[4]).longValue();
+
+        return new EaglerUUID(mostSigBits, leastSigBits);
+    }
+    
+    public long getLeastSignificantBits() {
+        return leastSigBits;
+    }
+    
+    public long getMostSignificantBits() {
+        return mostSigBits;
+    }
+
+    /**
+     * The version number associated with this {@code UUID}.  The version
+     * number describes how this {@code UUID} was generated.
+     *
+     * The version number has the following meaning:
+     * <ul>
+     * <li>1    Time-based UUID
+     * <li>2    DCE security UUID
+     * <li>3    Name-based UUID
+     * <li>4    Randomly generated UUID
+     * </ul>
+     *
+     * @return  The version number of this {@code UUID}
+     */
+    public int version() {
+        // Version is bits masked by 0x000000000000F000 in MS long
+        return (int)((mostSigBits >> 12) & 0x0f);
+    }
+
+    /**
+     * The variant number associated with this {@code UUID}.  The variant
+     * number describes the layout of the {@code UUID}.
+     *
+     * The variant number has the following meaning:
+     * <ul>
+     * <li>0    Reserved for NCS backward compatibility
+     * <li>2    <a href="http://www.ietf.org/rfc/rfc4122.txt">IETF&nbsp;RFC&nbsp;4122</a>
+     * (Leach-Salz), used by this class
+     * <li>6    Reserved, Microsoft Corporation backward compatibility
+     * <li>7    Reserved for future definition
+     * </ul>
+     *
+     * @return  The variant number of this {@code UUID}
+     */
+    public int variant() {
+        // This field is composed of a varying number of bits.
+        // 0    -    -    Reserved for NCS backward compatibility
+        // 1    0    -    The IETF aka Leach-Salz variant (used by this class)
+        // 1    1    0    Reserved, Microsoft backward compatibility
+        // 1    1    1    Reserved for future definition.
+        return (int) ((leastSigBits >>> (64 - (leastSigBits >>> 62)))
+                      & (leastSigBits >> 63));
+    }
+    
+    public long timestamp() {
+        if (version() != 1) {
+            throw new UnsupportedOperationException("Not a time-based UUID");
+        }
+
+        return (mostSigBits & 0x0FFFL) << 48
+             | ((mostSigBits >> 16) & 0x0FFFFL) << 32
+             | mostSigBits >>> 32;
+    }
+
+    /**
+     * The clock sequence value associated with this UUID.
+     *
+     * <p> The 14 bit clock sequence value is constructed from the clock
+     * sequence field of this UUID.  The clock sequence field is used to
+     * guarantee temporal uniqueness in a time-based UUID.
+     *
+     * <p> The {@code clockSequence} value is only meaningful in a time-based
+     * UUID, which has version type 1.  If this UUID is not a time-based UUID
+     * then this method throws UnsupportedOperationException.
+     *
+     * @return  The clock sequence of this {@code UUID}
+     *
+     * @throws  UnsupportedOperationException
+     *          If this UUID is not a version 1 UUID
+     */
+    public int clockSequence() {
+        if (version() != 1) {
+            throw new UnsupportedOperationException("Not a time-based UUID");
+        }
+
+        return (int)((leastSigBits & 0x3FFF000000000000L) >>> 48);
+    }
+    
+    public String toString() {
+        return (digits(mostSigBits >> 32, 8) + "-" +
+                digits(mostSigBits >> 16, 4) + "-" +
+                digits(mostSigBits, 4) + "-" +
+                digits(leastSigBits >> 48, 4) + "-" +
+                digits(leastSigBits, 12));
+    }
+    
+    private static String digits(long val, int digits) {
+        long hi = 1L << (digits * 4);
+        return Long.toHexString(hi | (val & (hi - 1))).substring(1);
+    }
+    
+    public int hashCode() {
+        long hilo = mostSigBits ^ leastSigBits;
+        return ((int)(hilo >> 32)) ^ (int) hilo;
+    }
+    
+    public boolean equals(Object obj) {
+        if ((null == obj) || !(obj instanceof EaglerUUID))
+            return false;
+        EaglerUUID id = (EaglerUUID)obj;
+        return (mostSigBits == id.mostSigBits &&
+                leastSigBits == id.leastSigBits);
+    }
+    
+    public int compareTo(EaglerUUID val) {
+        return (this.mostSigBits < val.mostSigBits ? -1 :
+                (this.mostSigBits > val.mostSigBits ? 1 :
+                 (this.leastSigBits < val.leastSigBits ? -1 :
+                  (this.leastSigBits > val.leastSigBits ? 1 :
+                   0))));
+    }
+}

src/main/java/net/lax1dude/eaglercraft/sp/EaglercraftRandom.java

@@ -0,0 +1,84 @@
+package net.lax1dude.eaglercraft.sp;
+
+public class EaglercraftRandom {
+
+    private static final long multiplier = 0x5DEECE66DL;
+    private static final long addend = 0xBL;
+    private static final long mask = (1L << 48) - 1;
+
+    private static final double DOUBLE_UNIT = 0x1.0p-53;
+    private long seed = 69;
+    
+    public EaglercraftRandom() {
+        this(System.nanoTime());
+    }
+    
+    public EaglercraftRandom(long seed) {
+        setSeed(seed);
+    }
+    
+    public void setSeed(long yeed) {
+    	seed = yeed;
+    }
+    
+    protected int next(int bits) {
+    	seed = (seed * multiplier + addend) & mask;
+        return (int)(seed >>> (48 - bits));
+    }
+    
+    public void nextBytes(byte[] bytes) {
+        for (int i = 0, len = bytes.length; i < len; )
+            for (int rnd = nextInt(),
+                     n = Math.min(len - i, Integer.SIZE/Byte.SIZE);
+                 n-- > 0; rnd >>= Byte.SIZE)
+                bytes[i++] = (byte)rnd;
+    }
+    public int nextInt() {
+        return next(32);
+    }
+    public int nextInt(int bound) {
+        int r = next(31);
+        int m = bound - 1;
+        if ((bound & m) == 0)  // i.e., bound is a power of 2
+            r = (int)((bound * (long)r) >> 31);
+        else {
+            for (int u = r;
+                 u - (r = u % bound) + m < 0;
+                 u = next(31))
+                ;
+        }
+        return r;
+    }
+    public long nextLong() {
+        return ((long)(next(32)) << 32) + next(32);
+    }
+    public boolean nextBoolean() {
+        return next(1) != 0;
+    }
+    public float nextFloat() {
+        return next(24) / ((float)(1 << 24));
+    }
+    public double nextDouble() {
+        return (((long)(next(26)) << 27) + next(27)) * DOUBLE_UNIT;
+    }
+    private double nextNextGaussian;
+    private boolean haveNextNextGaussian = false;
+    public double nextGaussian() {
+        // See Knuth, ACP, Section 3.4.1 Algorithm C.
+        if (haveNextNextGaussian) {
+            haveNextNextGaussian = false;
+            return nextNextGaussian;
+        } else {
+            double v1, v2, s;
+            do {
+                v1 = 2 * nextDouble() - 1; // between -1 and 1
+                v2 = 2 * nextDouble() - 1; // between -1 and 1
+                s = v1 * v1 + v2 * v2;
+            } while (s >= 1 || s == 0);
+            double multiplier = StrictMath.sqrt(-2 * StrictMath.log(s)/s);
+            nextNextGaussian = v2 * multiplier;
+            haveNextNextGaussian = true;
+            return v1 * multiplier;
+        }
+    }
+}

src/main/java/net/lax1dude/eaglercraft/sp/ExpiringSet.java

@@ -0,0 +1,74 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+
+// note that there's a few things not implemented, but I don't care.
+
+public class ExpiringSet<T> extends HashSet<T> {
+	private final long expiration;
+	private final ExpiringEvent<T> event;
+
+	private final Map<T, Long> timestamps = new HashMap<>();
+
+	public ExpiringSet(long expiration) {
+		this.expiration = expiration;
+		this.event = null;
+	}
+
+	public ExpiringSet(long expiration, ExpiringEvent<T> event) {
+		this.expiration = expiration;
+		this.event = event;
+	}
+
+	public interface ExpiringEvent<T> {
+		void onExpiration(T item);
+	}
+
+	public void checkForExpirations() {
+		Iterator<T> iterator = this.timestamps.keySet().iterator();
+		long now = SysUtil.steadyTimeMillis();
+		while (iterator.hasNext()) {
+			T element = iterator.next();
+			if (super.contains(element)) {
+				if (this.timestamps.get(element) + this.expiration < now) {
+					if (this.event != null)
+						this.event.onExpiration(element);
+					iterator.remove();
+					super.remove(element);
+				}
+			} else {
+				iterator.remove();
+				super.remove(element);
+			}
+		}
+	}
+
+	public boolean add(T o) {
+		checkForExpirations();
+		boolean success = super.add(o);
+		if (success)
+			timestamps.put(o, SysUtil.steadyTimeMillis());
+		return success;
+	}
+
+	public boolean remove(Object o) {
+		checkForExpirations();
+		boolean success = super.remove(o);
+		if (success)
+			timestamps.remove(o);
+		return success;
+	}
+
+	public void clear() {
+		this.timestamps.clear();
+		super.clear();
+	}
+
+	public boolean contains(Object o) {
+		checkForExpirations();
+		return super.contains(o);
+	}
+}

src/main/java/net/lax1dude/eaglercraft/sp/GeneralDigest.java

@@ -0,0 +1,124 @@
+package net.lax1dude.eaglercraft.sp;
+
+/**
+ * base implementation of MD4 family style digest as outlined in
+ * "Handbook of Applied Cryptography", pages 344 - 347.
+ */
+public abstract class GeneralDigest {
+    private byte[]  xBuf;
+    private int     xBufOff;
+
+    private long    byteCount;
+
+	/**
+	 * Standard constructor
+	 */
+	protected GeneralDigest()
+	{
+		xBuf = new byte[4];
+		xBufOff = 0;
+	}
+
+	/**
+	 * Copy constructor.  We are using copy constructors in place
+	 * of the Object.clone() interface as this interface is not
+	 * supported by J2ME.
+	 */
+	protected GeneralDigest(GeneralDigest t)
+	{
+        xBuf = new byte[t.xBuf.length];
+		System.arraycopy(t.xBuf, 0, xBuf, 0, t.xBuf.length);
+
+		xBufOff = t.xBufOff;
+		byteCount = t.byteCount;
+	}
+
+    public void update(
+        byte in)
+    {
+        xBuf[xBufOff++] = in;
+
+        if (xBufOff == xBuf.length)
+        {
+            processWord(xBuf, 0);
+            xBufOff = 0;
+        }
+
+        byteCount++;
+    }
+
+    public void update(
+        byte[]  in,
+        int     inOff,
+        int     len)
+    {
+        //
+        // fill the current word
+        //
+        while ((xBufOff != 0) && (len > 0))
+        {
+            update(in[inOff]);
+
+            inOff++;
+            len--;
+        }
+
+        //
+        // process whole words.
+        //
+        while (len > xBuf.length)
+        {
+            processWord(in, inOff);
+
+            inOff += xBuf.length;
+            len -= xBuf.length;
+            byteCount += xBuf.length;
+        }
+
+        //
+        // load in the remainder.
+        //
+        while (len > 0)
+        {
+            update(in[inOff]);
+
+            inOff++;
+            len--;
+        }
+    }
+
+    public void finish()
+    {
+        long    bitLength = (byteCount << 3);
+
+        //
+        // add the pad bytes.
+        //
+        update((byte)128);
+
+        while (xBufOff != 0)
+        {
+            update((byte)0);
+        }
+
+        processLength(bitLength);
+
+        processBlock();
+    }
+
+    public void reset()
+    {
+        byteCount = 0;
+
+        xBufOff = 0;
+		for ( int i = 0; i < xBuf.length; i++ ) {
+			xBuf[i] = 0;
+		}
+    }
+
+    protected abstract void processWord(byte[] in, int inOff);
+
+    protected abstract void processLength(long bitLength);
+
+    protected abstract void processBlock();
+}

src/main/java/net/lax1dude/eaglercraft/sp/IntegratedServer.java

@@ -0,0 +1,555 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.teavm.jso.JSBody;
+import org.teavm.jso.JSFunctor;
+import org.teavm.jso.JSObject;
+import org.teavm.jso.typedarrays.ArrayBuffer;
+
+import net.lax1dude.eaglercraft.sp.ipc.*;
+import net.minecraft.src.AchievementList;
+import net.minecraft.src.AchievementMap;
+import net.minecraft.src.CompressedStreamTools;
+import net.minecraft.src.EnumGameType;
+import net.minecraft.src.ILogAgent;
+import net.minecraft.src.NBTTagCompound;
+import net.minecraft.src.StringTranslate;
+import net.minecraft.src.WorldSettings;
+import net.minecraft.src.WorldType;
+
+public class IntegratedServer {
+	
+	private static final LinkedList<PKT> messageQueue = new LinkedList<>();
+	
+	protected static class PKT {
+		protected final String channel;
+		protected final byte[] data;
+		protected PKT(String channel, byte[] data) {
+			this.channel = channel;
+			this.data = data;
+		}
+	}
+	
+	private static EAGMinecraftServer currentProcess = null;
+	private static WorldSettings newWorldSettings = null;
+	
+	public static EAGMinecraftServer getServer() {
+		return currentProcess;
+	}
+	
+	public static final ILogAgent logger = new EAGLogAgent();
+	
+	@JSFunctor
+	private static interface WorkerBinaryPacketHandler extends JSObject {
+		public void onMessage(String channel, ArrayBuffer buf);
+	}
+	
+	private static class WorkerBinaryPacketHandlerImpl implements WorkerBinaryPacketHandler {
+		
+		public void onMessage(String channel, ArrayBuffer buf) {
+			if(channel == null) {
+				System.err.println("Recieved IPC packet with null channel");
+				return;
+			}
+			
+			if(buf == null) {
+				System.err.println("Recieved IPC packet with null buffer");
+				return;
+			}
+			
+			synchronized(messageQueue) {
+				messageQueue.add(new PKT(channel, TeaVMUtils.wrapByteArrayBuffer(buf)));
+			}
+		}
+		
+	}
+	
+	private static void tryStopServer() {
+		if(currentProcess != null) {
+			try {
+				currentProcess.stopServer();
+			}catch(Throwable t) {
+				System.err.println("Failed to stop server!");
+				throwExceptionToClient("Failed to stop server!", t);
+			}
+			currentProcess = null;
+		}
+	}
+	
+	public static void updateStatusString(String stat, float prog) {
+		sendIPCPacket(new IPCPacket0DProgressUpdate(stat, prog));
+	}
+	
+	private static boolean isServerStopped() {
+		return currentProcess == null || !currentProcess.isServerRunning();
+	}
+	
+	public static void throwExceptionToClient(String msg, Throwable t) {
+		String str = t.toString();
+		System.err.println("Exception was raised to client: " + str);
+		t.printStackTrace();
+		List<String> arr = new LinkedList<>();
+		for(StackTraceElement e : t.getStackTrace()) {
+			String st = e.toString();
+			arr.add(st);
+		}
+		sendIPCPacket(new IPCPacket15ThrowException(str, arr));
+	}
+	
+	public static void sendTaskFailed() {
+		sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacketFFProcessKeepAlive.FAILURE));
+	}
+	
+	private static void processAsyncMessageQueue() {
+		ArrayList<PKT> cur;
+		synchronized(messageQueue) {
+			if(messageQueue.size() <= 0) {
+				return;
+			}
+			cur = new ArrayList<PKT>(messageQueue);
+			messageQueue.clear();
+		}
+		Iterator<PKT> itr = cur.iterator();
+		while(itr.hasNext()) {
+			PKT msg = itr.next();
+			if(msg.channel.equals("IPC")) {
+				
+				IPCPacketBase packet;
+				try {
+					packet = IPCPacketManager.IPCDeserialize(msg.data);
+				}catch(IOException e) {
+					System.err.print("Failed to deserialize IPC packet: ");
+					e.printStackTrace();
+					continue;
+				}
+				
+				int id = packet.id();
+				
+				try {
+					switch(id) {
+					case IPCPacket00StartServer.ID: {
+							IPCPacket00StartServer pkt = (IPCPacket00StartServer)packet;
+							
+							if(!isServerStopped()) {
+								currentProcess.stopServer();
+							}
+							
+							currentProcess = new EAGMinecraftServer(pkt.worldName, pkt.ownerName, newWorldSettings);
+							currentProcess.setBaseServerProperties(pkt.initialDifficulty, newWorldSettings == null ? EnumGameType.SURVIVAL : newWorldSettings.getGameType());
+							currentProcess.startServer();
+							
+							String[] worlds = SYS.VFS.getFile("worlds.txt").getAllLines();
+							if(worlds == null || (worlds.length == 1 && worlds[0].trim().length() <= 0)) {
+								worlds = null;
+							}
+							if(worlds == null) {
+								SYS.VFS.getFile("worlds.txt").setAllChars(pkt.worldName);
+							}else {
+								boolean found = false;
+								for(String s : worlds) {
+									if(s.equals(pkt.worldName)) {
+										found = true;
+										break;
+									}
+								}
+								if(!found) {
+									String[] s = new String[worlds.length + 1];
+									s[0] = pkt.worldName;
+									System.arraycopy(worlds, 0, s, 1, worlds.length);
+									SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", s));
+								}
+							}
+							
+							sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket00StartServer.ID));
+						}
+						break;
+					case IPCPacket01StopServer.ID: {
+							if(!isServerStopped()) {
+								try {
+									currentProcess.stopServer();
+									currentProcess = null;
+								}catch(Throwable t) {
+									throwExceptionToClient("Failed to stop server!", t);
+								}
+							}else {
+								System.err.println("Client tried to stop server while it wasn't running for some reason");
+							}
+							sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket01StopServer.ID));
+						}
+						break;
+					case IPCPacket02InitWorld.ID: {
+							tryStopServer();
+							IPCPacket02InitWorld pkt = (IPCPacket02InitWorld)packet;
+							newWorldSettings = new WorldSettings(pkt.seed, pkt.gamemode == 1 ? EnumGameType.CREATIVE : EnumGameType.SURVIVAL, pkt.structures,
+									pkt.gamemode == 2, pkt.worldType == 1 ? WorldType.FLAT : (pkt.worldType == 2 ? WorldType.LARGE_BIOMES : WorldType.DEFAULT_1_1));
+							newWorldSettings.func_82750_a(pkt.worldArgs);
+							if(pkt.bonusChest) {
+								newWorldSettings.enableBonusChest();
+							}
+							if(pkt.cheats) {
+								newWorldSettings.enableCommands();
+							}
+						}
+						break;
+					case IPCPacket03DeleteWorld.ID: {
+							tryStopServer();
+							IPCPacket03DeleteWorld pkt = (IPCPacket03DeleteWorld)packet;
+							if(SYS.VFS.deleteFiles("worlds/" + pkt.worldName + "/") <= 0) {
+								throwExceptionToClient("Failed to delete world!", new RuntimeException("VFS did not delete directory 'worlds/" + pkt.worldName + "' correctly"));
+								sendTaskFailed();
+								break;
+							}
+							String[] worldsTxt = SYS.VFS.getFile("worlds.txt").getAllLines();
+							if(worldsTxt != null) {
+								LinkedList<String> newWorlds = new LinkedList<>();
+								for(String str : worldsTxt) {
+									if(!str.equalsIgnoreCase(pkt.worldName)) {
+										newWorlds.add(str);
+									}
+								}
+								SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", newWorlds));
+							}
+							sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket03DeleteWorld.ID));
+						}
+						break;
+					case IPCPacket04RenameWorld.ID: {
+							tryStopServer();
+							IPCPacket04RenameWorld pkt = (IPCPacket04RenameWorld)packet;
+							if(SYS.VFS.renameFiles("worlds/" + pkt.worldOldName + "/", "worlds/" + pkt.worldNewName + "/", pkt.copy) <= 0) {
+								throwExceptionToClient("Failed to copy/rename server!", new RuntimeException("VFS did not copy/rename directory 'worlds/" + pkt.worldOldName + "' correctly"));
+								sendTaskFailed();
+								break;
+							}else {
+								String[] worldsTxt = SYS.VFS.getFile("worlds.txt").getAllLines();
+								LinkedList<String> newWorlds = new LinkedList<>();
+								if(worldsTxt != null) {
+									for(String str : worldsTxt) {
+										if(pkt.copy || !str.equalsIgnoreCase(pkt.worldOldName)) {
+											newWorlds.add(str);
+										}
+									}
+								}
+								newWorlds.add(pkt.worldNewName);
+								SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", newWorlds));
+								VFile worldDat = new VFile("worlds", pkt.worldNewName, "level.dat");
+								if(worldDat.canRead()) {
+									NBTTagCompound worldDatNBT = CompressedStreamTools.decompress(worldDat.getAllBytes());
+									worldDatNBT.getCompoundTag("Data").setString("LevelName", pkt.displayName);
+									worldDat.setAllBytes(CompressedStreamTools.compress(worldDatNBT));
+								}else {
+									throwExceptionToClient("Failed to copy/rename world!", new RuntimeException("Failed to change level.dat world '" + pkt.worldNewName + "' display name to '" + pkt.displayName + "' because level.dat was missing"));
+									sendTaskFailed();
+									break;
+								}
+							}
+							sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket04RenameWorld.ID));
+						}
+						break;
+					case IPCPacket05RequestData.ID: {
+							IPCPacket05RequestData pkt = (IPCPacket05RequestData)packet;
+							if(pkt.request == IPCPacket05RequestData.REQUEST_LEVEL_EAG) {
+								try {
+									sendIPCPacket(new IPCPacket09RequestResponse(WorldConverterEPK.exportWorld(pkt.worldName)));
+								} catch (Throwable t) {
+									String realWorldName = pkt.worldName;
+									int i = realWorldName.lastIndexOf(new String(new char[] { (char)253, (char)233, (char)233 }));
+									if(i != -1) {
+										realWorldName = realWorldName.substring(0, i);
+									}
+									throwExceptionToClient("Failed to export world '" + realWorldName+ "' as EPK", t);
+									sendTaskFailed();
+								}
+							}else if(pkt.request == IPCPacket05RequestData.REQUEST_LEVEL_MCA) {
+								try {
+									sendIPCPacket(new IPCPacket09RequestResponse(WorldConverterMCA.exportWorld(pkt.worldName)));
+								} catch (Throwable t) {
+									throwExceptionToClient("Failed to export world '" + pkt.worldName+ "' as MCA", t);
+									sendTaskFailed();
+								}
+							}
+						}
+						break;
+					case IPCPacket06RenameWorldNBT.ID: {
+							IPCPacket06RenameWorldNBT pkt = (IPCPacket06RenameWorldNBT)packet;
+							if(isServerStopped()) {
+								VFile worldDat = new VFile("worlds", pkt.worldName, "level.dat");
+								if(worldDat.canRead()) {
+									NBTTagCompound worldDatNBT = CompressedStreamTools.decompress(worldDat.getAllBytes());
+									worldDatNBT.getCompoundTag("Data").setString("LevelName", pkt.displayName);
+									worldDat.setAllBytes(CompressedStreamTools.compress(worldDatNBT));
+								}else {
+									throwExceptionToClient("Failed to rename world!", new RuntimeException("Failed to change level.dat world '" + pkt.worldName + "' display name to '" + pkt.displayName + "' because level.dat was missing"));
+								}
+							}else {
+								System.err.println("Client tried to rename a world '" + pkt.worldName + "' to have name '" + pkt.displayName + "' while the server is running");
+								sendTaskFailed();
+							}
+						}
+						break;
+					case IPCPacket07ImportWorld.ID: {
+							IPCPacket07ImportWorld pkt = (IPCPacket07ImportWorld)packet;
+							if(isServerStopped()) {
+								if(pkt.worldFormat == IPCPacket07ImportWorld.WORLD_FORMAT_EAG) {
+									try {
+										WorldConverterEPK.importWorld(pkt.worldData, pkt.worldName);
+										sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket07ImportWorld.ID));
+									}catch(Throwable t) {
+										SYS.VFS.deleteFiles("worlds/" + VFSSaveHandler.worldNameToFolderName(pkt.worldName) + "/");
+										throwExceptionToClient("Failed to import world '" + pkt.worldName + "' as EPK", t);
+										sendTaskFailed();
+									}
+								}else if(pkt.worldFormat == IPCPacket07ImportWorld.WORLD_FORMAT_MCA) {
+									try {
+										WorldConverterMCA.importWorld(pkt.worldData, pkt.worldName);
+										sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket07ImportWorld.ID));
+									}catch(Throwable t) {
+										SYS.VFS.deleteFiles("worlds/" + VFSSaveHandler.worldNameToFolderName(pkt.worldName) + "/");
+										throwExceptionToClient("Failed to import world '" + pkt.worldName + "' as MCA", t);
+										sendTaskFailed();
+									}
+								}else {
+									System.err.println("Client tried to import a world in an unknown format: 0x" + Integer.toHexString(pkt.worldFormat));
+									sendTaskFailed();
+								}
+							}else {
+								System.err.println("Client tried to import a world '" + pkt.worldName + "' while the server is running");
+								sendTaskFailed();
+							}
+						}
+						break;
+					case IPCPacket09RequestResponse.ID:
+						
+						break;
+					case IPCPacket0ASetWorldDifficulty.ID: {
+							IPCPacket0ASetWorldDifficulty pkt = (IPCPacket0ASetWorldDifficulty)packet;
+							if(!isServerStopped()) {
+								currentProcess.setDifficultyForAllWorlds(pkt.difficulty);
+							}else {
+								System.err.println("Client tried to set difficulty '" + pkt.difficulty + "' while server was stopped");
+								sendTaskFailed();
+							}
+						}
+						break;
+					case IPCPacket0BPause.ID: {
+							IPCPacket0BPause pkt = (IPCPacket0BPause)packet;
+							if(!isServerStopped()) {
+								if(!pkt.pause && !currentProcess.getPaused()) {
+									currentProcess.saveAllWorlds(true);
+								}else {
+									currentProcess.setPaused(pkt.pause);
+									if(pkt.pause) {
+										currentProcess.saveAllWorlds(true);
+									}
+								}
+								sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket0BPause.ID));
+							}else {
+								System.err.println("Client tried to " + (pkt.pause ? "pause" : "unpause") + " while server was stopped");
+							}
+						}
+						break;
+					case IPCPacket0CPlayerChannel.ID: {
+							IPCPacket0CPlayerChannel pkt = (IPCPacket0CPlayerChannel)packet;
+							if(!isServerStopped()) {
+								if(pkt.open) {
+									if(!currentProcess.getNetworkThread().openChannel(pkt.channel)) {
+										System.err.println("Client tried to open a duplicate channel '" + pkt.channel + "'");
+									}
+								}else {
+									if(!currentProcess.getNetworkThread().closeChannel(pkt.channel)) {
+										System.err.println("Client tried to close a null channel '" + pkt.channel + "'");
+									}
+								}
+							}else {
+								System.err.println("Client tried to " + (pkt.open ? "open" : "close") + " channel '" + pkt.channel + "' while server was stopped");
+							}
+						}
+						break;
+					case IPCPacket0EListWorlds.ID: {
+							if(isServerStopped()) {
+								String[] worlds = SYS.VFS.getFile("worlds.txt").getAllLines();
+								if(worlds == null || (worlds.length == 1 && worlds[0].trim().length() <= 0)) {
+									worlds = null;
+								}
+								if(worlds == null) {
+									sendIPCPacket(new IPCPacket16NBTList(IPCPacket16NBTList.WORLD_LIST, new LinkedList<NBTTagCompound>()));
+									break;
+								}
+								LinkedList<String> updatedList = new LinkedList<>();
+								LinkedList<NBTTagCompound> sendListNBT = new LinkedList<>();
+								boolean rewrite = false;
+								for(String w : worlds) {
+									byte[] dat = (new VFile("worlds", w, "level.dat")).getAllBytes();
+									if(dat != null) {
+										NBTTagCompound worldDatNBT;
+										try {
+											worldDatNBT = CompressedStreamTools.decompress(dat);
+											worldDatNBT.setString("folderName", w);
+											sendListNBT.add(worldDatNBT);
+											updatedList.add(w);
+											continue;
+										}catch(IOException e) {
+											// shit fuck
+										}
+										
+									}
+									rewrite = true;
+									System.err.println("World level.dat for '" + w + "' was not found, attempting to delete 'worlds/" + w + "/*'");
+									if(SYS.VFS.deleteFiles("worlds/" + w) <= 0) {
+										System.err.println("No files were deleted in 'worlds/" + w + "/*', this may be corruption but '" + w + "' will still be removed from worlds.txt");
+									}
+								}
+								if(rewrite) {
+									SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", updatedList));
+								}
+								sendIPCPacket(new IPCPacket16NBTList(IPCPacket16NBTList.WORLD_LIST, sendListNBT));
+							}else {
+								System.err.println("Client tried to list worlds while server was running");
+								sendTaskFailed();
+							}
+						}
+						break;
+					case IPCPacket0FListFiles.ID:
+						
+						break;
+					case IPCPacket10FileRead.ID:
+						
+						break;
+					case IPCPacket12FileWrite.ID:
+						
+						break;
+					case IPCPacket13FileCopyMove.ID:
+						
+						break;
+					case IPCPacket14StringList.ID: {
+							IPCPacket14StringList pkt = (IPCPacket14StringList)packet;
+							switch(pkt.opCode) {
+							case IPCPacket14StringList.LOCALE:
+								StringTranslate.init(pkt.stringList);
+								break;
+							case IPCPacket14StringList.STAT_GUID:
+								AchievementMap.init(pkt.stringList);
+								AchievementList.init();
+								break;
+							default:
+								System.err.println("Strange string list 0x" + Integer.toHexString(pkt.opCode) + " with length " + pkt.stringList.size() + " recieved");
+								break;
+							}
+						}
+						break;
+					case IPCPacket17ConfigureLAN.ID: {
+						IPCPacket17ConfigureLAN pkt = (IPCPacket17ConfigureLAN)packet;
+						//currentProcess.getConfigurationManager().configureLAN(pkt.gamemode, pkt.cheats, pkt.iceServers); // FIX THIS SHIT
+					}
+					break;
+					case IPCPacket18ClearPlayers.ID: {
+						SYS.VFS.deleteFiles("worlds/" + ((IPCPacket18ClearPlayers)packet).worldName + "/player");
+						sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket18ClearPlayers.ID));
+					}
+					break;
+					default:
+						System.err.println("IPC packet type 0x" + Integer.toHexString(id) + " class '" + packet.getClass().getSimpleName() + "' was not handled");
+						sendTaskFailed();
+						break;
+					}
+				}catch(Throwable t) {
+					String str = "IPC packet 0x" + Integer.toHexString(id) + " class '" + packet.getClass().getSimpleName() + "' was not processed correctly";
+					System.err.println(str);
+					throwExceptionToClient(str, t);
+					sendTaskFailed();
+				}
+				
+				continue;
+			}
+		}
+		long watchDog = SysUtil.steadyTimeMillis();
+		itr = cur.iterator();
+		int overflow = 0;
+		while(itr.hasNext()) {
+			PKT msg = itr.next();
+			if(!msg.channel.equals("IPC")) {
+				if(SysUtil.steadyTimeMillis() - watchDog > 500l) {
+					++overflow;
+					continue;
+				}
+				if(!msg.channel.startsWith("NET|") || currentProcess == null) {
+					//System.err.println("Unknown ICP channel: '" + msg.channel + "' passed " + msg.data.length + " bytes");
+					continue;
+				}
+				String u = msg.channel.substring(4);
+				currentProcess.getNetworkThread().recievePacket(u, msg.data);
+			}
+		}
+		if(overflow > 0) {
+			System.err.println("Async ICP queue is overloaded, server dropped " + overflow + " player packets");
+		}
+	}
+	
+	@JSBody(params = { "ch", "dat" }, script = "postMessage({ ch: ch, dat : dat });")
+	private static native void sendWorkerPacket(String channel, ArrayBuffer arr);
+	
+	public static void sendIPCPacket(IPCPacketBase pkt) {
+		byte[] serialized;
+		
+		try {
+			serialized = IPCPacketManager.IPCSerialize(pkt);
+		} catch (IOException e) {
+			System.err.println("Could not serialize IPC packet 0x" + Integer.toHexString(pkt.id()) + " class '" + pkt.getClass().getSimpleName() + "'");
+			e.printStackTrace();
+			return;
+		}
+		
+		sendWorkerPacket("IPC", TeaVMUtils.unwrapArrayBuffer(serialized));
+	}
+	
+	public static void sendPlayerPacket(String channel, byte[] buf) {
+		//System.out.println("[Server][SEND][" + channel + "]: " + buf.length);
+		sendWorkerPacket("NET|" + channel, TeaVMUtils.unwrapArrayBuffer(buf));
+	}
+	
+	private static boolean isRunning = false;
+	
+	public static void halt() {
+		isRunning = false;
+	}
+	
+	private static void mainLoop() {
+		processAsyncMessageQueue();
+		
+		if(currentProcess != null) {
+			currentProcess.mainLoop();
+			if(currentProcess.isServerStopped()) {
+				sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket01StopServer.ID));
+				currentProcess = null;
+			}
+		}else {
+			SysUtil.sleep(50);
+		}
+	}
+	
+	@JSBody(params = { "wb" }, script = "onmessage = function(o) { wb(o.data.ch, o.data.dat); };")
+	private static native void registerPacketHandler(WorkerBinaryPacketHandler wb);
+	
+	public static void main(String[] args) {
+		
+		registerPacketHandler(new WorkerBinaryPacketHandlerImpl());
+		
+		isRunning = true;
+		
+		sendIPCPacket(new IPCPacketFFProcessKeepAlive(0xFF));
+		
+		while(isRunning) {
+			
+			mainLoop();
+			
+			SysUtil.immediateContinue();
+		}
+		
+		// yee
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/MD5Digest.java

@@ -0,0 +1,244 @@
+package net.lax1dude.eaglercraft.sp;
+
+/**
+ * implementation of MD5 as outlined in "Handbook of Applied Cryptography",
+ * pages 346 - 347.
+ */
+public class MD5Digest extends GeneralDigest {
+	private static final int DIGEST_LENGTH = 16;
+
+	private int H1, H2, H3, H4; // IV's
+
+	private int[] X = new int[16];
+	private int xOff;
+
+	public String getAlgorithmName() {
+		return "MD5";
+	}
+
+	public int getDigestSize() {
+		return DIGEST_LENGTH;
+	}
+
+	protected void processWord(byte[] in, int inOff) {
+		X[xOff++] = littleEndianToInt(in, inOff);
+
+		if (xOff == 16) {
+			processBlock();
+		}
+	}
+
+	private int littleEndianToInt(byte[] bs, int off) {
+		int n = bs[off] & 0xff;
+		n |= (bs[++off] & 0xff) << 8;
+		n |= (bs[++off] & 0xff) << 16;
+		n |= bs[++off] << 24;
+		return n;
+	}
+
+	protected void processLength(long bitLength) {
+		if (xOff > 14) {
+			processBlock();
+		}
+
+		X[14] = (int) (bitLength & 0xffffffff);
+		X[15] = (int) (bitLength >>> 32);
+	}
+
+	public int doFinal(byte[] out, int outOff) {
+		finish();
+
+		intToLittleEndian(H1, out, outOff);
+		intToLittleEndian(H2, out, outOff + 4);
+		intToLittleEndian(H3, out, outOff + 8);
+		intToLittleEndian(H4, out, outOff + 12);
+
+		reset();
+
+		return DIGEST_LENGTH;
+	}
+
+	private void intToLittleEndian(int n, byte[] bs, int off) {
+		bs[off] = (byte) (n);
+		bs[++off] = (byte) (n >>> 8);
+		bs[++off] = (byte) (n >>> 16);
+		bs[++off] = (byte) (n >>> 24);
+	}
+
+	/**
+	 * reset the chaining variables to the IV values.
+	 */
+	public void reset() {
+		super.reset();
+
+		H1 = 0x67452301;
+		H2 = 0xefcdab89;
+		H3 = 0x98badcfe;
+		H4 = 0x10325476;
+
+		xOff = 0;
+
+		for (int i = 0; i != X.length; i++) {
+			X[i] = 0;
+		}
+	}
+
+	//
+	// round 1 left rotates
+	//
+	private static final int S11 = 7;
+	private static final int S12 = 12;
+	private static final int S13 = 17;
+	private static final int S14 = 22;
+
+	//
+	// round 2 left rotates
+	//
+	private static final int S21 = 5;
+	private static final int S22 = 9;
+	private static final int S23 = 14;
+	private static final int S24 = 20;
+
+	//
+	// round 3 left rotates
+	//
+	private static final int S31 = 4;
+	private static final int S32 = 11;
+	private static final int S33 = 16;
+	private static final int S34 = 23;
+
+	//
+	// round 4 left rotates
+	//
+	private static final int S41 = 6;
+	private static final int S42 = 10;
+	private static final int S43 = 15;
+	private static final int S44 = 21;
+
+	/*
+	 * rotate int x left n bits.
+	 */
+	private int rotateLeft(int x, int n) {
+		return (x << n) | (x >>> (32 - n));
+	}
+
+	/*
+	 * F, G, H and I are the basic MD5 functions.
+	 */
+	private int F(int u, int v, int w) {
+		return (u & v) | (~u & w);
+	}
+
+	private int G(int u, int v, int w) {
+		return (u & w) | (v & ~w);
+	}
+
+	private int H(int u, int v, int w) {
+		return u ^ v ^ w;
+	}
+
+	private int K(int u, int v, int w) {
+		return v ^ (u | ~w);
+	}
+
+	protected void processBlock() {
+		int a = H1;
+		int b = H2;
+		int c = H3;
+		int d = H4;
+
+		//
+		// Round 1 - F cycle, 16 times.
+		//
+		a = rotateLeft(a + F(b, c, d) + X[0] + 0xd76aa478, S11) + b;
+		d = rotateLeft(d + F(a, b, c) + X[1] + 0xe8c7b756, S12) + a;
+		c = rotateLeft(c + F(d, a, b) + X[2] + 0x242070db, S13) + d;
+		b = rotateLeft(b + F(c, d, a) + X[3] + 0xc1bdceee, S14) + c;
+		a = rotateLeft(a + F(b, c, d) + X[4] + 0xf57c0faf, S11) + b;
+		d = rotateLeft(d + F(a, b, c) + X[5] + 0x4787c62a, S12) + a;
+		c = rotateLeft(c + F(d, a, b) + X[6] + 0xa8304613, S13) + d;
+		b = rotateLeft(b + F(c, d, a) + X[7] + 0xfd469501, S14) + c;
+		a = rotateLeft(a + F(b, c, d) + X[8] + 0x698098d8, S11) + b;
+		d = rotateLeft(d + F(a, b, c) + X[9] + 0x8b44f7af, S12) + a;
+		c = rotateLeft(c + F(d, a, b) + X[10] + 0xffff5bb1, S13) + d;
+		b = rotateLeft(b + F(c, d, a) + X[11] + 0x895cd7be, S14) + c;
+		a = rotateLeft(a + F(b, c, d) + X[12] + 0x6b901122, S11) + b;
+		d = rotateLeft(d + F(a, b, c) + X[13] + 0xfd987193, S12) + a;
+		c = rotateLeft(c + F(d, a, b) + X[14] + 0xa679438e, S13) + d;
+		b = rotateLeft(b + F(c, d, a) + X[15] + 0x49b40821, S14) + c;
+
+		//
+		// Round 2 - G cycle, 16 times.
+		//
+		a = rotateLeft(a + G(b, c, d) + X[1] + 0xf61e2562, S21) + b;
+		d = rotateLeft(d + G(a, b, c) + X[6] + 0xc040b340, S22) + a;
+		c = rotateLeft(c + G(d, a, b) + X[11] + 0x265e5a51, S23) + d;
+		b = rotateLeft(b + G(c, d, a) + X[0] + 0xe9b6c7aa, S24) + c;
+		a = rotateLeft(a + G(b, c, d) + X[5] + 0xd62f105d, S21) + b;
+		d = rotateLeft(d + G(a, b, c) + X[10] + 0x02441453, S22) + a;
+		c = rotateLeft(c + G(d, a, b) + X[15] + 0xd8a1e681, S23) + d;
+		b = rotateLeft(b + G(c, d, a) + X[4] + 0xe7d3fbc8, S24) + c;
+		a = rotateLeft(a + G(b, c, d) + X[9] + 0x21e1cde6, S21) + b;
+		d = rotateLeft(d + G(a, b, c) + X[14] + 0xc33707d6, S22) + a;
+		c = rotateLeft(c + G(d, a, b) + X[3] + 0xf4d50d87, S23) + d;
+		b = rotateLeft(b + G(c, d, a) + X[8] + 0x455a14ed, S24) + c;
+		a = rotateLeft(a + G(b, c, d) + X[13] + 0xa9e3e905, S21) + b;
+		d = rotateLeft(d + G(a, b, c) + X[2] + 0xfcefa3f8, S22) + a;
+		c = rotateLeft(c + G(d, a, b) + X[7] + 0x676f02d9, S23) + d;
+		b = rotateLeft(b + G(c, d, a) + X[12] + 0x8d2a4c8a, S24) + c;
+
+		//
+		// Round 3 - H cycle, 16 times.
+		//
+		a = rotateLeft(a + H(b, c, d) + X[5] + 0xfffa3942, S31) + b;
+		d = rotateLeft(d + H(a, b, c) + X[8] + 0x8771f681, S32) + a;
+		c = rotateLeft(c + H(d, a, b) + X[11] + 0x6d9d6122, S33) + d;
+		b = rotateLeft(b + H(c, d, a) + X[14] + 0xfde5380c, S34) + c;
+		a = rotateLeft(a + H(b, c, d) + X[1] + 0xa4beea44, S31) + b;
+		d = rotateLeft(d + H(a, b, c) + X[4] + 0x4bdecfa9, S32) + a;
+		c = rotateLeft(c + H(d, a, b) + X[7] + 0xf6bb4b60, S33) + d;
+		b = rotateLeft(b + H(c, d, a) + X[10] + 0xbebfbc70, S34) + c;
+		a = rotateLeft(a + H(b, c, d) + X[13] + 0x289b7ec6, S31) + b;
+		d = rotateLeft(d + H(a, b, c) + X[0] + 0xeaa127fa, S32) + a;
+		c = rotateLeft(c + H(d, a, b) + X[3] + 0xd4ef3085, S33) + d;
+		b = rotateLeft(b + H(c, d, a) + X[6] + 0x04881d05, S34) + c;
+		a = rotateLeft(a + H(b, c, d) + X[9] + 0xd9d4d039, S31) + b;
+		d = rotateLeft(d + H(a, b, c) + X[12] + 0xe6db99e5, S32) + a;
+		c = rotateLeft(c + H(d, a, b) + X[15] + 0x1fa27cf8, S33) + d;
+		b = rotateLeft(b + H(c, d, a) + X[2] + 0xc4ac5665, S34) + c;
+
+		//
+		// Round 4 - K cycle, 16 times.
+		//
+		a = rotateLeft(a + K(b, c, d) + X[0] + 0xf4292244, S41) + b;
+		d = rotateLeft(d + K(a, b, c) + X[7] + 0x432aff97, S42) + a;
+		c = rotateLeft(c + K(d, a, b) + X[14] + 0xab9423a7, S43) + d;
+		b = rotateLeft(b + K(c, d, a) + X[5] + 0xfc93a039, S44) + c;
+		a = rotateLeft(a + K(b, c, d) + X[12] + 0x655b59c3, S41) + b;
+		d = rotateLeft(d + K(a, b, c) + X[3] + 0x8f0ccc92, S42) + a;
+		c = rotateLeft(c + K(d, a, b) + X[10] + 0xffeff47d, S43) + d;
+		b = rotateLeft(b + K(c, d, a) + X[1] + 0x85845dd1, S44) + c;
+		a = rotateLeft(a + K(b, c, d) + X[8] + 0x6fa87e4f, S41) + b;
+		d = rotateLeft(d + K(a, b, c) + X[15] + 0xfe2ce6e0, S42) + a;
+		c = rotateLeft(c + K(d, a, b) + X[6] + 0xa3014314, S43) + d;
+		b = rotateLeft(b + K(c, d, a) + X[13] + 0x4e0811a1, S44) + c;
+		a = rotateLeft(a + K(b, c, d) + X[4] + 0xf7537e82, S41) + b;
+		d = rotateLeft(d + K(a, b, c) + X[11] + 0xbd3af235, S42) + a;
+		c = rotateLeft(c + K(d, a, b) + X[2] + 0x2ad7d2bb, S43) + d;
+		b = rotateLeft(b + K(c, d, a) + X[9] + 0xeb86d391, S44) + c;
+
+		H1 += a;
+		H2 += b;
+		H3 += c;
+		H4 += d;
+
+		//
+		// reset the offset and clean out the word buffer.
+		//
+		xOff = 0;
+		for (int i = 0; i != X.length; i++) {
+			X[i] = 0;
+		}
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/MessageChannel.java

@@ -0,0 +1,36 @@
+package net.lax1dude.eaglercraft.sp;
+
+import org.teavm.jso.JSBody;
+import org.teavm.jso.JSClass;
+import org.teavm.jso.JSObject;
+import org.teavm.jso.JSProperty;
+import org.teavm.jso.workers.MessagePort;
+
+/**
+ * Copyright (c) 2024 lax1dude. All Rights Reserved.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+@JSClass
+public class MessageChannel implements JSObject {
+
+	@JSBody(params = { }, script = "return (typeof MessageChannel !== \"undefined\");")
+	public static native boolean supported();
+
+	@JSProperty
+	public native MessagePort getPort1();
+
+	@JSProperty
+	public native MessagePort getPort2();
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/NoCatchParse.java

@@ -0,0 +1,412 @@
+package net.lax1dude.eaglercraft.sp;
+
+public class NoCatchParse {
+
+	public static final int INT_EXCEPTION = Integer.MIN_VALUE;
+	public static final float FLOAT_EXCEPTION = Float.NaN;
+	public static final double DOUBLE_EXCEPTION = Double.NaN;
+
+	public static int parseInt(String s) {
+		return parseInt(s, 10, false, INT_EXCEPTION);
+	}
+
+	public static int parseInt(String s, int radix) {
+		return parseInt(s, radix, false, INT_EXCEPTION);
+	}
+
+	public static int parseInt(String s, int radix, boolean log) {
+		return parseInt(s, radix, log, INT_EXCEPTION);
+	}
+
+	public static int parseInt(String s, int radix, boolean log, int exceptionResult) {
+		if (s == null) {
+			if (log) {
+				System.err.println("parseInt: string was null");
+			}
+			return exceptionResult;
+		}
+
+		if (s.isEmpty()) {
+			if (log) {
+				System.err.println("parseInt: string was empty");
+			}
+			return exceptionResult;
+		}
+
+		if (radix < Character.MIN_RADIX || radix > Character.MAX_RADIX) {
+			if (log) {
+				System.err.println("parseInt: invalid radix '" + radix + "'");
+			}
+			return exceptionResult;
+		}
+
+		tryFail: {
+			int result = 0;
+			boolean negative = false;
+			int i = 0, len = s.length();
+			int limit = -Integer.MAX_VALUE;
+			int multmin;
+			int digit;
+
+			if (len > 0) {
+				char firstChar = s.charAt(0);
+				if (firstChar < '0') { // Possible leading "+" or "-"
+					if (firstChar == '-') {
+						negative = true;
+						limit = Integer.MIN_VALUE;
+					} else if (firstChar != '+')
+						break tryFail;
+
+					if (len == 1)
+						break tryFail;
+					i++;
+				}
+				multmin = limit / radix;
+				while (i < len) {
+					// Accumulating negatively avoids surprises near MAX_VALUE
+					digit = Character.digit(s.charAt(i++), radix);
+					if (digit < 0 || result < multmin) {
+
+						break tryFail;
+					}
+					result *= radix;
+					if (result < limit + digit) {
+						break tryFail;
+					}
+					result -= digit;
+				}
+			} else {
+				break tryFail;
+			}
+			int ret = negative ? result : -result;
+			if (ret == exceptionResult) {
+				System.err.println(
+						"parseInt: number '" + s + "' was parsed successfully but it is equal to exceptionResult");
+			}
+			return ret;
+		}
+		if (log) {
+			System.err.println("parseInt: cannot parse '" + s + "'");
+		}
+		return exceptionResult;
+	}
+
+	public static double parseDouble(String s) {
+		return parseDouble(s, false, DOUBLE_EXCEPTION);
+	}
+
+	public static double parseDouble(String s, boolean log) {
+		return parseDouble(s, log, DOUBLE_EXCEPTION);
+	}
+
+	public static double parseDouble(String s, boolean log, double exceptionResult) {
+		if (s == null) {
+			if (log) {
+				System.err.println("parseDouble: string was null");
+			}
+			return exceptionResult;
+		}
+
+		if (s.isEmpty()) {
+			if (log) {
+				System.err.println("parseDouble: string was empty");
+			}
+			return exceptionResult;
+		}
+
+		tryFail: {
+			int start = 0;
+			int end = s.length();
+			while (s.charAt(start) <= ' ') {
+				if (++start == end) {
+					break tryFail;
+				}
+			}
+			while (s.charAt(end - 1) <= ' ') {
+				--end;
+			}
+
+			boolean negative = false;
+			int index = start;
+			if (s.charAt(index) == '-') {
+				++index;
+				negative = true;
+			} else if (s.charAt(index) == '+') {
+				++index;
+			}
+			if (index == end) {
+				break tryFail;
+			}
+			char c = s.charAt(index);
+
+			long mantissa = 0;
+			int exp = 0;
+			boolean hasOneDigit = false;
+			if (c != '.') {
+				hasOneDigit = true;
+				if (c < '0' || c > '9') {
+					break tryFail;
+				}
+				while (index < end && s.charAt(index) == '0') {
+					++index;
+				}
+				while (index < end) {
+					c = s.charAt(index);
+					if (c < '0' || c > '9') {
+						break;
+					}
+					if (mantissa < Long.MAX_VALUE / 10 - 9) {
+						mantissa = mantissa * 10 + (c - '0');
+					} else {
+						++exp;
+					}
+					++index;
+				}
+			}
+			if (index < end && s.charAt(index) == '.') {
+				++index;
+				while (index < end) {
+					c = s.charAt(index);
+					if (c < '0' || c > '9') {
+						break;
+					}
+					if (mantissa < Long.MAX_VALUE / 10 - 9) {
+						mantissa = mantissa * 10 + (c - '0');
+						--exp;
+					}
+					++index;
+					hasOneDigit = true;
+				}
+				if (!hasOneDigit) {
+					break tryFail;
+				}
+			}
+			if (index < end) {
+				c = s.charAt(index);
+				if (c != 'e' && c != 'E') {
+					break tryFail;
+				}
+				++index;
+				boolean negativeExp = false;
+				if (index == end) {
+					break tryFail;
+				}
+				if (s.charAt(index) == '-') {
+					++index;
+					negativeExp = true;
+				} else if (s.charAt(index) == '+') {
+					++index;
+				}
+				int numExp = 0;
+				hasOneDigit = false;
+				while (index < end) {
+					c = s.charAt(index);
+					if (c < '0' || c > '9') {
+						break;
+					}
+					numExp = 10 * numExp + (c - '0');
+					hasOneDigit = true;
+					++index;
+				}
+				if (!hasOneDigit) {
+					break tryFail;
+				}
+				if (negativeExp) {
+					numExp = -numExp;
+				}
+				exp += numExp;
+			}
+			if (exp > 308 || exp == 308 && mantissa > 17976931348623157L) {
+				return !negative ? Double.POSITIVE_INFINITY : Double.NEGATIVE_INFINITY;
+			}
+			if (negative) {
+				mantissa = -mantissa;
+			}
+			return mantissa * doubleDecimalExponent(exp);
+		}
+		if (log) {
+			System.err.println("parseDouble: cannot parse '" + s + "'");
+		}
+		return exceptionResult;
+	}
+
+	public static double doubleDecimalExponent(int n) {
+		double d;
+		if (n < 0) {
+			d = 0.1;
+			n = -n;
+		} else {
+			d = 10;
+		}
+		double result = 1;
+		while (n != 0) {
+			if (n % 2 != 0) {
+				result *= d;
+			}
+			d *= d;
+			n /= 2;
+		}
+		return result;
+	}
+
+	public static float parseFloat(String s) {
+		return parseFloat(s, false, FLOAT_EXCEPTION);
+	}
+
+	public static float parseFloat(String s, boolean log) {
+		return parseFloat(s, log, FLOAT_EXCEPTION);
+	}
+
+	public static float parseFloat(String s, boolean log, float exceptionResult) {
+		if (s == null) {
+			if (log) {
+				System.err.println("parseFloat: string was null");
+			}
+			return exceptionResult;
+		}
+
+		if (s.isEmpty()) {
+			if (log) {
+				System.err.println("parseFloat: string was empty");
+			}
+			return exceptionResult;
+		}
+
+		tryFail: {
+			int start = 0;
+			int end = s.length();
+			while (s.charAt(start) <= ' ') {
+				if (++start == end) {
+					break tryFail;
+				}
+			}
+			while (s.charAt(end - 1) <= ' ') {
+				--end;
+			}
+
+			boolean negative = false;
+			int index = start;
+			if (s.charAt(index) == '-') {
+				++index;
+				negative = true;
+			} else if (s.charAt(index) == '+') {
+				++index;
+			}
+			if (index == end) {
+				break tryFail;
+			}
+			char c = s.charAt(index);
+
+			int mantissa = 0;
+			int exp = 0;
+
+			boolean hasOneDigit = false;
+			if (c != '.') {
+				hasOneDigit = true;
+				if (c < '0' || c > '9') {
+					break tryFail;
+				}
+
+				while (index < end && s.charAt(index) == '0') {
+					++index;
+				}
+				while (index < end) {
+					c = s.charAt(index);
+					if (c < '0' || c > '9') {
+						break;
+					}
+					if (mantissa < (Integer.MAX_VALUE / 10) - 9) {
+						mantissa = mantissa * 10 + (c - '0');
+					} else {
+						++exp;
+					}
+					++index;
+				}
+			}
+
+			if (index < end && s.charAt(index) == '.') {
+				++index;
+				while (index < end) {
+					c = s.charAt(index);
+					if (c < '0' || c > '9') {
+						break;
+					}
+					if (mantissa < (Integer.MAX_VALUE / 10) - 9) {
+						mantissa = mantissa * 10 + (c - '0');
+						--exp;
+					}
+					++index;
+					hasOneDigit = true;
+				}
+				if (!hasOneDigit) {
+					break tryFail;
+				}
+			}
+			if (index < end) {
+				c = s.charAt(index);
+				if (c != 'e' && c != 'E') {
+					break tryFail;
+				}
+				++index;
+				boolean negativeExp = false;
+				if (index == end) {
+					break tryFail;
+				}
+				if (s.charAt(index) == '-') {
+					++index;
+					negativeExp = true;
+				} else if (s.charAt(index) == '+') {
+					++index;
+				}
+				int numExp = 0;
+				hasOneDigit = false;
+				while (index < end) {
+					c = s.charAt(index);
+					if (c < '0' || c > '9') {
+						break;
+					}
+					numExp = 10 * numExp + (c - '0');
+					hasOneDigit = true;
+					++index;
+				}
+				if (!hasOneDigit) {
+					break tryFail;
+				}
+				if (negativeExp) {
+					numExp = -numExp;
+				}
+				exp += numExp;
+			}
+			if (exp > 38 || exp == 38 && mantissa > 34028234) {
+				return !negative ? Float.POSITIVE_INFINITY : Float.NEGATIVE_INFINITY;
+			}
+			if (negative) {
+				mantissa = -mantissa;
+			}
+			return mantissa * floatDecimalExponent(exp);
+		}
+		if (log) {
+			System.err.println("parseFloat: cannot parse '" + s + "'");
+		}
+		return exceptionResult;
+	}
+
+	private static float floatDecimalExponent(int n) {
+		double d;
+		if (n < 0) {
+			d = 0.1;
+			n = -n;
+		} else {
+			d = 10;
+		}
+		double result = 1;
+		while (n != 0) {
+			if (n % 2 != 0) {
+				result *= d;
+			}
+			d *= d;
+			n /= 2;
+		}
+		return (float) result;
+	}
+}

src/main/java/net/lax1dude/eaglercraft/sp/RandomAccessMemoryFile.java

@@ -0,0 +1,310 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.EOFException;
+import java.io.IOException;
+
+/**
+ * Copyright (c) 2023-2024 lax1dude. All Rights Reserved.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+public class RandomAccessMemoryFile implements DataInput, DataOutput {
+
+	private byte[] buffer;
+	private int length;
+	private int pos;
+
+	public RandomAccessMemoryFile(byte[] initialBuffer, int initialLength) {
+		this.buffer = initialBuffer;
+		this.length = initialLength;
+		this.pos = 0;
+	}
+
+	private void grow(int newMaxSize) {
+		if (length < newMaxSize) {
+			if (buffer.length < newMaxSize) {
+				byte[] newBuffer = new byte[newMaxSize | 0x7FFFF];
+				System.arraycopy(buffer, 0, newBuffer, 0, length);
+				buffer = newBuffer;
+			}
+			length = newMaxSize;
+		}
+	}
+
+	public byte[] getByteArray() {
+		byte[] b = new byte[length];
+		System.arraycopy(buffer, 0, b, 0, length);
+		return b;
+	}
+
+	public int read() throws IOException {
+		return (pos < length) ? (buffer[pos++] & 0xff) : -1;
+	}
+
+	private int readBytes(byte b[], int off, int len) throws IOException {
+		if (pos >= length) {
+			return -1;
+		}
+
+		int avail = length - pos;
+		if (len > avail) {
+			len = avail;
+		}
+		if (len <= 0) {
+			return 0;
+		}
+		System.arraycopy(buffer, pos, b, off, len);
+		pos += len;
+		return len;
+	}
+
+	public int read(byte b[], int off, int len) throws IOException {
+		return readBytes(b, off, len);
+	}
+
+	public int read(byte b[]) throws IOException {
+		return readBytes(b, 0, b.length);
+	}
+
+	public final void readFully(byte b[]) throws IOException {
+		readFully(b, 0, b.length);
+	}
+
+	public final void readFully(byte b[], int off, int len) throws IOException {
+		int n = 0;
+		do {
+			int count = this.read(b, off + n, len - n);
+			if (count < 0)
+				throw new EOFException();
+			n += count;
+		} while (n < len);
+	}
+
+	public int skipBytes(int n) throws IOException {
+		int newpos;
+
+		if (n <= 0) {
+			return 0;
+		}
+		newpos = pos + n;
+		if (newpos > length) {
+			newpos = length;
+		}
+		seek(newpos);
+
+		return (int) (newpos - pos);
+	}
+
+	public void write(int b) throws IOException {
+		grow(pos + 1);
+		buffer[pos] = (byte) b;
+		pos += 1;
+	}
+
+	private void writeBytes(byte b[], int off, int len) throws IOException {
+		grow(pos + len);
+		System.arraycopy(b, off, buffer, pos, len);
+		pos += len;
+	}
+
+	public void write(byte b[]) throws IOException {
+		writeBytes(b, 0, b.length);
+	}
+
+	public void write(byte b[], int off, int len) throws IOException {
+		writeBytes(b, off, len);
+	}
+
+	public void seek(int pos) {
+		this.pos = pos;
+	}
+
+	public int getLength() {
+		return length;
+	}
+
+	public void setLength(int newLength) {
+		grow(newLength);
+	}
+
+	public final boolean readBoolean() throws IOException {
+		int ch = this.read();
+		if (ch < 0)
+			throw new EOFException();
+		return (ch != 0);
+	}
+
+	public final byte readByte() throws IOException {
+		int ch = this.read();
+		if (ch < 0)
+			throw new EOFException();
+		return (byte) (ch);
+	}
+
+	public final int readUnsignedByte() throws IOException {
+		int ch = this.read();
+		if (ch < 0)
+			throw new EOFException();
+		return ch;
+	}
+
+	public final short readShort() throws IOException {
+		int ch1 = this.read();
+		int ch2 = this.read();
+		if ((ch1 | ch2) < 0)
+			throw new EOFException();
+		return (short) ((ch1 << 8) + (ch2 << 0));
+	}
+
+	public final int readUnsignedShort() throws IOException {
+		int ch1 = this.read();
+		int ch2 = this.read();
+		if ((ch1 | ch2) < 0)
+			throw new EOFException();
+		return (ch1 << 8) + (ch2 << 0);
+	}
+
+	public final char readChar() throws IOException {
+		int ch1 = this.read();
+		int ch2 = this.read();
+		if ((ch1 | ch2) < 0)
+			throw new EOFException();
+		return (char) ((ch1 << 8) + (ch2 << 0));
+	}
+
+	public final int readInt() throws IOException {
+		int ch1 = this.read();
+		int ch2 = this.read();
+		int ch3 = this.read();
+		int ch4 = this.read();
+		if ((ch1 | ch2 | ch3 | ch4) < 0)
+			throw new EOFException();
+		return ((ch1 << 24) + (ch2 << 16) + (ch3 << 8) + (ch4 << 0));
+	}
+
+	public final long readLong() throws IOException {
+		return ((long) (readInt()) << 32) + (readInt() & 0xFFFFFFFFL);
+	}
+
+	public final float readFloat() throws IOException {
+		return Float.intBitsToFloat(readInt());
+	}
+
+	public final double readDouble() throws IOException {
+		return Double.longBitsToDouble(readLong());
+	}
+
+	public final String readLine() throws IOException {
+		StringBuilder input = new StringBuilder();
+		int c = -1;
+		boolean eol = false;
+
+		while (!eol) {
+			switch (c = read()) {
+			case -1:
+			case '\n':
+				eol = true;
+				break;
+			case '\r':
+				eol = true;
+				int cur = pos;
+				if ((read()) != '\n') {
+					seek(cur);
+				}
+				break;
+			default:
+				input.append((char) c);
+				break;
+			}
+		}
+
+		if ((c == -1) && (input.length() == 0)) {
+			return null;
+		}
+		return input.toString();
+	}
+
+	public final String readUTF() throws IOException {
+		throw new IOException("TODO");
+	}
+
+	public final void writeBoolean(boolean v) throws IOException {
+		write(v ? 1 : 0);
+	}
+
+	public final void writeByte(int v) throws IOException {
+		write(v);
+	}
+
+	public final void writeShort(int v) throws IOException {
+		write((v >>> 8) & 0xFF);
+		write((v >>> 0) & 0xFF);
+	}
+
+	public final void writeChar(int v) throws IOException {
+		write((v >>> 8) & 0xFF);
+		write((v >>> 0) & 0xFF);
+	}
+
+	public final void writeInt(int v) throws IOException {
+		write((v >>> 24) & 0xFF);
+		write((v >>> 16) & 0xFF);
+		write((v >>> 8) & 0xFF);
+		write((v >>> 0) & 0xFF);
+	}
+
+	public final void writeLong(long v) throws IOException {
+		write((int) (v >>> 56) & 0xFF);
+		write((int) (v >>> 48) & 0xFF);
+		write((int) (v >>> 40) & 0xFF);
+		write((int) (v >>> 32) & 0xFF);
+		write((int) (v >>> 24) & 0xFF);
+		write((int) (v >>> 16) & 0xFF);
+		write((int) (v >>> 8) & 0xFF);
+		write((int) (v >>> 0) & 0xFF);
+	}
+
+	public final void writeFloat(float v) throws IOException {
+		writeInt(Float.floatToIntBits(v));
+	}
+
+	public final void writeDouble(double v) throws IOException {
+		writeLong(Double.doubleToLongBits(v));
+	}
+
+	public final void writeBytes(String s) throws IOException {
+		int len = s.length();
+		byte[] b = new byte[len];
+		s.getBytes(0, len, b, 0);
+		writeBytes(b, 0, len);
+	}
+
+	public final void writeChars(String s) throws IOException {
+		int clen = s.length();
+		int blen = 2 * clen;
+		byte[] b = new byte[blen];
+		char[] c = new char[clen];
+		s.getChars(0, clen, c, 0);
+		for (int i = 0, j = 0; i < clen; i++) {
+			b[j++] = (byte) (c[i] >>> 8);
+			b[j++] = (byte) (c[i] >>> 0);
+		}
+		writeBytes(b, 0, blen);
+	}
+
+	public final void writeUTF(String str) throws IOException {
+		throw new IOException("TODO");
+	}
+}

src/main/java/net/lax1dude/eaglercraft/sp/SHA1Digest.java

@@ -0,0 +1,213 @@
+package net.lax1dude.eaglercraft.sp;
+
+/**
+ * implementation of SHA-1 as outlined in "Handbook of Applied Cryptography",
+ * pages 346 - 349.
+ *
+ * It is interesting to ponder why the, apart from the extra IV, the other
+ * difference here from MD5 is the "endienness" of the word processing!
+ */
+public class SHA1Digest extends GeneralDigest {
+	private static final int DIGEST_LENGTH = 20;
+
+	private int H1, H2, H3, H4, H5;
+
+	private int[] X = new int[80];
+	private int xOff;
+
+	/**
+	 * Standard constructor
+	 */
+	public SHA1Digest() {
+		reset();
+	}
+
+	/**
+	 * Copy constructor. This will copy the state of the provided message digest.
+	 */
+	public SHA1Digest(SHA1Digest t) {
+		super(t);
+
+		H1 = t.H1;
+		H2 = t.H2;
+		H3 = t.H3;
+		H4 = t.H4;
+		H5 = t.H5;
+
+		System.arraycopy(t.X, 0, X, 0, t.X.length);
+		xOff = t.xOff;
+	}
+
+	public String getAlgorithmName() {
+		return "SHA-1";
+	}
+
+	public int getDigestSize() {
+		return DIGEST_LENGTH;
+	}
+
+	protected void processWord(byte[] in, int inOff) {
+		X[xOff++] = ((in[inOff] & 0xff) << 24) | ((in[inOff + 1] & 0xff) << 16) | ((in[inOff + 2] & 0xff) << 8)
+				| ((in[inOff + 3] & 0xff));
+
+		if (xOff == 16) {
+			processBlock();
+		}
+	}
+
+	private void unpackWord(int word, byte[] out, int outOff) {
+		out[outOff] = (byte) (word >>> 24);
+		out[outOff + 1] = (byte) (word >>> 16);
+		out[outOff + 2] = (byte) (word >>> 8);
+		out[outOff + 3] = (byte) word;
+	}
+
+	protected void processLength(long bitLength) {
+		if (xOff > 14) {
+			processBlock();
+		}
+
+		X[14] = (int) (bitLength >>> 32);
+		X[15] = (int) (bitLength & 0xffffffff);
+	}
+
+	public int doFinal(byte[] out, int outOff) {
+		finish();
+
+		unpackWord(H1, out, outOff);
+		unpackWord(H2, out, outOff + 4);
+		unpackWord(H3, out, outOff + 8);
+		unpackWord(H4, out, outOff + 12);
+		unpackWord(H5, out, outOff + 16);
+
+		reset();
+
+		return DIGEST_LENGTH;
+	}
+
+	/**
+	 * reset the chaining variables
+	 */
+	public void reset() {
+		super.reset();
+
+		H1 = 0x67452301;
+		H2 = 0xefcdab89;
+		H3 = 0x98badcfe;
+		H4 = 0x10325476;
+		H5 = 0xc3d2e1f0;
+
+		xOff = 0;
+		for (int i = 0; i != X.length; i++) {
+			X[i] = 0;
+		}
+	}
+
+	//
+	// Additive constants
+	//
+	private static final int Y1 = 0x5a827999;
+	private static final int Y2 = 0x6ed9eba1;
+	private static final int Y3 = 0x8f1bbcdc;
+	private static final int Y4 = 0xca62c1d6;
+
+	private int f(int u, int v, int w) {
+		return ((u & v) | ((~u) & w));
+	}
+
+	private int h(int u, int v, int w) {
+		return (u ^ v ^ w);
+	}
+
+	private int g(int u, int v, int w) {
+		return ((u & v) | (u & w) | (v & w));
+	}
+
+	private int rotateLeft(int x, int n) {
+		return (x << n) | (x >>> (32 - n));
+	}
+
+	protected void processBlock() {
+		//
+		// expand 16 word block into 80 word block.
+		//
+		for (int i = 16; i <= 79; i++) {
+			X[i] = rotateLeft((X[i - 3] ^ X[i - 8] ^ X[i - 14] ^ X[i - 16]), 1);
+		}
+
+		//
+		// set up working variables.
+		//
+		int A = H1;
+		int B = H2;
+		int C = H3;
+		int D = H4;
+		int E = H5;
+
+		//
+		// round 1
+		//
+		for (int j = 0; j <= 19; j++) {
+			int t = rotateLeft(A, 5) + f(B, C, D) + E + X[j] + Y1;
+
+			E = D;
+			D = C;
+			C = rotateLeft(B, 30);
+			B = A;
+			A = t;
+		}
+
+		//
+		// round 2
+		//
+		for (int j = 20; j <= 39; j++) {
+			int t = rotateLeft(A, 5) + h(B, C, D) + E + X[j] + Y2;
+
+			E = D;
+			D = C;
+			C = rotateLeft(B, 30);
+			B = A;
+			A = t;
+		}
+
+		//
+		// round 3
+		//
+		for (int j = 40; j <= 59; j++) {
+			int t = rotateLeft(A, 5) + g(B, C, D) + E + X[j] + Y3;
+
+			E = D;
+			D = C;
+			C = rotateLeft(B, 30);
+			B = A;
+			A = t;
+		}
+
+		//
+		// round 4
+		//
+		for (int j = 60; j <= 79; j++) {
+			int t = rotateLeft(A, 5) + h(B, C, D) + E + X[j] + Y4;
+
+			E = D;
+			D = C;
+			C = rotateLeft(B, 30);
+			B = A;
+			A = t;
+		}
+
+		H1 += A;
+		H2 += B;
+		H3 += C;
+		H4 += D;
+		H5 += E;
+
+		//
+		// reset the offset and clean out the word buffer.
+		//
+		xOff = 0;
+		for (int i = 0; i != X.length; i++) {
+			X[i] = 0;
+		}
+	}
+}

src/main/java/net/lax1dude/eaglercraft/sp/SYS.java

@@ -0,0 +1,28 @@
+package net.lax1dude.eaglercraft.sp;
+
+import org.teavm.jso.JSBody;
+
+import net.lax1dude.eaglercraft.sp.VirtualFilesystem.VFSHandle;
+
+public class SYS {
+
+	public static final VirtualFilesystem VFS;
+	
+	@JSBody(params = { }, script = "return eaglercraftServerOpts.worldDatabaseName;")
+	private static native String getWorldDatabaseName();
+	
+	static {
+		
+		VFSHandle vh = VirtualFilesystem.openVFS("_net_lax1dude_eaglercraft_sp_VirtualFilesystem_1_5_2_" + getWorldDatabaseName());
+		
+		if(vh.vfs == null) {
+			System.err.println("Could not init filesystem!");
+			IntegratedServer.throwExceptionToClient("Could not init filesystem!", new RuntimeException("VFSHandle.vfs was null"));
+		}
+		
+		VFS = vh.vfs;
+		
+	}
+	
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/SkinsPlugin.java

@@ -0,0 +1,108 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+
+import net.minecraft.src.EntityPlayerMP;
+import net.minecraft.src.Packet250CustomPayload;
+
+public class SkinsPlugin {
+	
+	private static final HashMap<String,byte[]> skinCollection = new HashMap<>();
+	private static final HashMap<String,byte[]> capeCollection = new HashMap<>();
+	private static final HashMap<String,Long> lastSkinLayerUpdate = new HashMap<>();
+
+	private static final int[] SKIN_DATA_SIZE = new int[] { 64*32*4, 64*64*4, -9, -9, 1, 64*64*4, -9 }; // 128 pixel skins crash clients
+	private static final int[] CAPE_DATA_SIZE = new int[] { 32*32*4, -9, 1 };
+	
+	public static boolean handleMessage(EntityPlayerMP player, Packet250CustomPayload payload) {
+		if(payload.data.length > 0) {
+			String user = player.username;
+			byte[] msg = payload.data;
+			try {
+				if("EAG|MySkin".equals(payload.channel)) {
+					if(!skinCollection.containsKey(user)) {
+						int t = (int)msg[0] & 0xFF;
+						if(t < SKIN_DATA_SIZE.length && msg.length == (SKIN_DATA_SIZE[t] + 1)) {
+							skinCollection.put(user, msg);
+						}
+					}
+					return true;
+				}
+				if("EAG|MyCape".equals(payload.channel)) {
+					if(!capeCollection.containsKey(user)) {
+						int t = (int)msg[0] & 0xFF;
+						if(t < CAPE_DATA_SIZE.length && msg.length == (CAPE_DATA_SIZE[t] + 2)) {
+							capeCollection.put(user, msg);
+						}
+					}
+					return true;
+				}
+				if("EAG|FetchSkin".equals(payload.channel)) {
+					if(msg.length > 2) {
+						String fetch = new String(msg, 2, msg.length - 2, StandardCharsets.UTF_8);
+						byte[] data;
+						if((data = skinCollection.get(fetch)) != null) {
+							byte[] conc = new byte[data.length + 2];
+							conc[0] = msg[0]; conc[1] = msg[1]; //synchronization cookie
+							System.arraycopy(data, 0, conc, 2, data.length);
+							if((data = capeCollection.get(fetch)) != null) {
+								byte[] conc2 = new byte[conc.length + data.length];
+								System.arraycopy(conc, 0, conc2, 0, conc.length);
+								System.arraycopy(data, 0, conc2, conc.length, data.length);
+								conc = conc2;
+							}
+							player.playerNetServerHandler.sendPacket(new Packet250CustomPayload("EAG|UserSkin", conc));
+						}
+					}
+					return true;
+				}
+				if("EAG|SkinLayers".equals(payload.channel)) {
+					long millis = SysUtil.steadyTimeMillis();
+					Long lsu = lastSkinLayerUpdate.get(user);
+					if(lsu != null && millis - lsu < 700L) { // DoS protection
+						return true;
+					}
+					lastSkinLayerUpdate.put(user, millis);
+					byte[] data;
+					if((data = capeCollection.get(user)) != null) {
+						data[1] = msg[0];
+					}else {
+						data = new byte[] { (byte)2, msg[0], (byte)0 };
+						capeCollection.put(user, data);
+					}
+					ByteArrayOutputStream bao = new ByteArrayOutputStream();
+					DataOutputStream dd = new DataOutputStream(bao);
+					dd.write(msg[0]);
+					dd.writeUTF(user);
+					byte[] bpacket = bao.toByteArray();
+					for(Object o : player.mcServer.getConfigurationManager().playerEntityList) {
+						EntityPlayerMP pl = (EntityPlayerMP) o;
+						if(!pl.username.equals(user)) {
+							pl.playerNetServerHandler.sendPacket(new Packet250CustomPayload("EAG|SkinLayers", bpacket));
+						}
+					}
+					return true;
+				}
+			}catch(Throwable t) {
+				// hacker
+			}
+		}
+		return false;
+	}
+	
+	public static void handleDisconnect(EntityPlayerMP player) {
+		skinCollection.remove(player.username);
+		capeCollection.remove(player.username);
+		lastSkinLayerUpdate.remove(player.username);
+	}
+
+	public static void reset() {
+		skinCollection.clear();
+		capeCollection.clear();
+		lastSkinLayerUpdate.clear();
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/SysUtil.java

@@ -0,0 +1,152 @@
+package net.lax1dude.eaglercraft.sp;
+
+import org.teavm.interop.Async;
+import org.teavm.interop.AsyncCallback;
+import org.teavm.jso.JSBody;
+import org.teavm.jso.JSObject;
+import org.teavm.jso.browser.Window;
+import org.teavm.jso.core.JSString;
+import org.teavm.jso.dom.events.EventListener;
+import org.teavm.jso.dom.events.MessageEvent;
+import org.teavm.platform.Platform;
+import org.teavm.platform.PlatformRunnable;
+
+public class SysUtil {
+
+	private static final JSObject steadyTimeFunc = getSteadyTimeFunc();
+
+	@JSBody(params = { }, script = "return ((typeof performance !== \"undefined\") && (typeof performance.now === \"function\"))"
+			+ "? performance.now.bind(performance)"
+			+ ": (function(epochStart){ return function() { return Date.now() - epochStart; }; })(Date.now());")
+	private static native JSObject getSteadyTimeFunc();
+
+	@JSBody(params = { "steadyTimeFunc" }, script = "return steadyTimeFunc();")
+	private static native double steadyTimeMillis0(JSObject steadyTimeFunc);
+
+	public static long steadyTimeMillis() {
+		return (long)steadyTimeMillis0(steadyTimeFunc);
+	}
+
+	public static long nanoTime() {
+		return (long)(steadyTimeMillis0(steadyTimeFunc) * 1000000.0);
+	}
+
+	@Async
+	public static native void sleep(int millis);
+
+	private static void sleep(int millis, final AsyncCallback<Void> callback) {
+		Platform.schedule(new DumbSleepHandler(callback), millis);
+	}
+
+	private static class DumbSleepHandler implements PlatformRunnable {
+		private final AsyncCallback<Void> callback;
+		private DumbSleepHandler(AsyncCallback<Void> callback) {
+			this.callback = callback;
+		}
+		@Override
+		public void run() {
+			callback.complete(null);
+		}
+	}
+
+	private static boolean hasCheckedImmediateContinue = false;
+	private static MessageChannel immediateContinueChannel = null;
+	private static Runnable currentContinueHack = null;
+	private static final JSString emptyJSString = JSString.valueOf("");
+
+	public static void immediateContinue() {
+		if(!hasCheckedImmediateContinue) {
+			hasCheckedImmediateContinue = true;
+			checkImmediateContinueSupport();
+		}
+		if(immediateContinueChannel != null) {
+			immediateContinueTeaVM();
+		}else {
+			sleep(0);
+		}
+	}
+
+	@Async
+	private static native void immediateContinueTeaVM();
+
+	private static void immediateContinueTeaVM(final AsyncCallback<Void> cb) {
+		if(currentContinueHack != null) {
+			cb.error(new IllegalStateException("Worker thread is already waiting for an immediate continue callback!"));
+			return;
+		}
+		currentContinueHack = () -> {
+			cb.complete(null);
+		};
+		try {
+			immediateContinueChannel.getPort2().postMessage(emptyJSString);
+		}catch(Throwable t) {
+			System.err.println("Caught error posting immediate continue, using setTimeout instead");
+			Window.setTimeout(() -> cb.complete(null), 0);
+		}
+	}
+
+	private static void checkImmediateContinueSupport() {
+		try {
+			immediateContinueChannel = null;
+			if(!MessageChannel.supported()) {
+				System.err.println("Fast immediate continue will be disabled for server context due to MessageChannel being unsupported");
+				return;
+			}
+			immediateContinueChannel = new MessageChannel();
+			immediateContinueChannel.getPort1().addEventListener("message", new EventListener<MessageEvent>() {
+				@Override
+				public void handleEvent(MessageEvent evt) {
+					Runnable toRun = currentContinueHack;
+					currentContinueHack = null;
+					if(toRun != null) {
+						toRun.run();
+					}
+				}
+			});
+			immediateContinueChannel.getPort1().start();
+			immediateContinueChannel.getPort2().start();
+			final boolean[] checkMe = new boolean[1];
+			checkMe[0] = false;
+			currentContinueHack = () -> {
+				checkMe[0] = true;
+			};
+			immediateContinueChannel.getPort2().postMessage(emptyJSString);
+			if(checkMe[0]) {
+				currentContinueHack = null;
+				if(immediateContinueChannel != null) {
+					safeShutdownChannel(immediateContinueChannel);
+				}
+				immediateContinueChannel = null;
+				System.err.println("Fast immediate continue will be disabled for server context due to actually continuing immediately");
+				return;
+			}
+			sleep(10);
+			currentContinueHack = null;
+			if(!checkMe[0]) {
+				if(immediateContinueChannel != null) {
+					safeShutdownChannel(immediateContinueChannel);
+				}
+				immediateContinueChannel = null;
+				System.err.println("Fast immediate continue will be disabled for server context due to startup check failing");
+			}
+		}catch(Throwable t) {
+			System.err.println("Fast immediate continue will be disabled for server context due to exceptions");
+			if(immediateContinueChannel != null) {
+				safeShutdownChannel(immediateContinueChannel);
+			}
+			immediateContinueChannel = null;
+		}
+	}
+
+	private static void safeShutdownChannel(MessageChannel chan) {
+		try {
+			chan.getPort1().close();
+		}catch(Throwable tt) {
+		}
+		try {
+			chan.getPort2().close();
+		}catch(Throwable tt) {
+		}
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/TeaVMUtils.java

@@ -0,0 +1,93 @@
+package net.lax1dude.eaglercraft.sp;
+
+import org.teavm.backend.javascript.spi.GeneratedBy;
+import org.teavm.backend.javascript.spi.InjectedBy;
+import org.teavm.jso.typedarrays.ArrayBuffer;
+import org.teavm.jso.typedarrays.ArrayBufferView;
+import org.teavm.jso.typedarrays.Float32Array;
+import org.teavm.jso.typedarrays.Int16Array;
+import org.teavm.jso.typedarrays.Int32Array;
+import org.teavm.jso.typedarrays.Int8Array;
+import org.teavm.jso.typedarrays.Uint8Array;
+
+public class TeaVMUtils {
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapTypedArray.class)
+	public static native Int8Array unwrapByteArray(byte[] buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapArrayBuffer.class)
+	public static native ArrayBuffer unwrapArrayBuffer(byte[] buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapTypedArray.class)
+	public static native ArrayBufferView unwrapArrayBufferView(byte[] buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapTypedArray.class)
+	public static native byte[] wrapByteArray(Int8Array buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBuffer.class)
+	public static native byte[] wrapByteArrayBuffer(ArrayBuffer buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBufferView.class)
+	public static native byte[] wrapByteArrayBufferView(ArrayBufferView buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapUnsignedTypedArray.class)
+	public static native Uint8Array unwrapUnsignedByteArray(byte[] buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBufferView.class)
+	public static native byte[] wrapUnsignedByteArray(Uint8Array buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapTypedArray.class)
+	public static native Int32Array unwrapIntArray(int[] buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapArrayBuffer.class)
+	public static native ArrayBuffer unwrapArrayBuffer(int[] buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapTypedArray.class)
+	public static native ArrayBufferView unwrapArrayBufferView(int[] buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapTypedArray.class)
+	public static native int[] wrapIntArray(Int32Array buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBuffer.class)
+	public static native int[] wrapIntArrayBuffer(ArrayBuffer buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBufferView.class)
+	public static native int[] wrapIntArrayBufferView(ArrayBufferView buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapTypedArray.class)
+	public static native Float32Array unwrapFloatArray(float[] buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapArrayBuffer.class)
+	public static native ArrayBuffer unwrapArrayBuffer(float[] buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapTypedArray.class)
+	public static native ArrayBufferView unwrapArrayBufferView(float[] buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapTypedArray.class)
+	public static native float[] wrapFloatArray(Float32Array buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBuffer.class)
+	public static native float[] wrapFloatArrayBuffer(ArrayBuffer buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBufferView.class)
+	public static native float[] wrapFloatArrayBufferView(ArrayBufferView buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapTypedArray.class)
+	public static native Int16Array unwrapShortArray(short[] buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapArrayBuffer.class)
+	public static native ArrayBuffer unwrapArrayBuffer(short[] buf);
+
+	@InjectedBy(TeaVMUtilsUnwrapGenerator.UnwrapTypedArray.class)
+	public static native ArrayBufferView unwrapArrayBufferView(short[] buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapTypedArray.class)
+	public static native short[] wrapShortArray(Int16Array buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBuffer.class)
+	public static native short[] wrapShortArrayBuffer(ArrayBuffer buf);
+
+	@GeneratedBy(TeaVMUtilsUnwrapGenerator.WrapArrayBufferView.class)
+	public static native short[] wrapShortArrayBuffer(ArrayBufferView buf);
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/TeaVMUtilsUnwrapGenerator.java

@@ -0,0 +1,158 @@
+package net.lax1dude.eaglercraft.sp;
+
+import org.teavm.backend.javascript.codegen.SourceWriter;
+import org.teavm.backend.javascript.spi.Generator;
+import org.teavm.backend.javascript.spi.GeneratorContext;
+import org.teavm.backend.javascript.spi.Injector;
+import org.teavm.backend.javascript.spi.InjectorContext;
+import org.teavm.model.MethodReference;
+
+public class TeaVMUtilsUnwrapGenerator {
+
+	// WARNING: This code uses internal TeaVM APIs that may not have
+	// been intended for end users of the compiler to program with
+
+	public static class UnwrapArrayBuffer implements Injector {
+
+		@Override
+		public void generate(InjectorContext context, MethodReference methodRef) {
+			context.writeExpr(context.getArgument(0));
+			context.getWriter().append(".data.buffer");
+		}
+
+	}
+
+	public static class UnwrapTypedArray implements Injector {
+
+		@Override
+		public void generate(InjectorContext context, MethodReference methodRef) {
+			context.writeExpr(context.getArgument(0));
+			context.getWriter().append(".data");
+		}
+
+	}
+
+	public static class WrapArrayBuffer implements Generator {
+
+		@Override
+		public void generate(GeneratorContext context, SourceWriter writer, MethodReference methodRef) {
+	        String parName = context.getParameterName(1);
+			switch (methodRef.getName()) {
+			case "wrapByteArrayBuffer":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_bytecls").append(',').ws();
+				writer.append("new Int8Array(").append(parName).append("))").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapIntArrayBuffer":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_intcls").append(',').ws();
+				writer.append("new Int32Array(").append(parName).append("))").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapFloatArrayBuffer":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_floatcls").append(',').ws();
+				writer.append("new Float32Array(").append(parName).append("))").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapShortArrayBuffer":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_shortcls").append(',').ws();
+				writer.append("new Int16Array(").append(parName).append("))").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			default:
+				break;
+			}
+		}
+
+	}
+
+	public static class WrapArrayBufferView implements Generator {
+
+		@Override
+		public void generate(GeneratorContext context, SourceWriter writer, MethodReference methodRef) {
+	        String parName = context.getParameterName(1);
+			switch (methodRef.getName()) {
+			case "wrapByteArrayBufferView":
+			case "wrapUnsignedByteArray":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_bytecls").append(',').ws();
+				writer.append("new Int8Array(").append(parName).append(".buffer))").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapIntArrayBufferView":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_intcls").append(',').ws();
+				writer.append("new Int32Array(").append(parName).append(".buffer))").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapFloatArrayBufferView":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_floatcls").append(',').ws();
+				writer.append("new Float32Array(").append(parName).append(".buffer))").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapShortArrayBufferView":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_shortcls").append(',').ws();
+				writer.append("new Int16Array(").append(parName).append(".buffer))").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			default:
+				break;
+			}
+		}
+
+	}
+
+	public static class WrapTypedArray implements Generator {
+
+		@Override
+		public void generate(GeneratorContext context, SourceWriter writer, MethodReference methodRef) {
+	        String parName = context.getParameterName(1);
+			switch (methodRef.getName()) {
+			case "wrapByteArray":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_shortcls").append(',').ws();
+				writer.append(parName).append(")").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapIntArray":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_intcls").append(',').ws();
+				writer.append(parName).append(")").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapFloatArray":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_floatcls").append(',').ws();
+				writer.append(parName).append(")").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			case "wrapShortArray":
+				writer.append("return ").append(parName).ws().append('?').ws();
+				writer.appendFunction("$rt_wrapArray").append('(').appendFunction("$rt_shortcls").append(',').ws();
+				writer.append(parName).append(")").ws();
+				writer.append(':').ws().append("null;").softNewLine();
+				break;
+			default:
+				break;
+			}
+		}
+
+	}
+
+	public static class UnwrapUnsignedTypedArray implements Injector {
+
+		@Override
+		public void generate(InjectorContext context, MethodReference methodRef) {
+			context.getWriter().append("new Uint8Array(");
+			context.writeExpr(context.getArgument(0));
+			context.getWriter().append(".data.buffer)");
+		}
+
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/VFSChunkLoader.java

@@ -0,0 +1,307 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.List;
+
+import net.minecraft.src.Chunk;
+import net.minecraft.src.ChunkCoordIntPair;
+import net.minecraft.src.CompressedStreamTools;
+import net.minecraft.src.Entity;
+import net.minecraft.src.EntityList;
+import net.minecraft.src.ExtendedBlockStorage;
+import net.minecraft.src.IChunkLoader;
+import net.minecraft.src.MinecraftException;
+import net.minecraft.src.NBTTagCompound;
+import net.minecraft.src.NBTTagList;
+import net.minecraft.src.NextTickListEntry;
+import net.minecraft.src.NibbleArray;
+import net.minecraft.src.TileEntity;
+import net.minecraft.src.World;
+
+public class VFSChunkLoader implements IChunkLoader {
+	
+	public final VFile chunkDirectory;
+	
+	private static final String hex = "0123456789ABCDEF";
+	
+	public static String getChunkPath(int x, int z) {
+		int unsignedX = x + 1900000;
+		int unsignedZ = z + 1900000;
+		
+		char[] path = new char[12];
+		for(int i = 5; i >= 0; --i) {
+			path[i] = hex.charAt((unsignedX >> (i * 4)) & 0xF);
+			path[i + 6] = hex.charAt((unsignedZ >> (i * 4)) & 0xF);
+		}
+		
+		return new String(path);
+	}
+
+	public static ChunkCoordIntPair getChunkCoords(String filename) {
+		String strX = filename.substring(0, 6);
+		String strZ = filename.substring(6);
+
+		int retX = 0;
+		int retZ = 0;
+
+		for(int i = 0; i < 6; ++i) {
+			retX |= hex.indexOf(strX.charAt(i)) << (i << 2);
+			retZ |= hex.indexOf(strZ.charAt(i)) << (i << 2);
+		}
+
+		return new ChunkCoordIntPair(retX - 1900000, retZ - 1900000);
+	}
+	
+	public VFSChunkLoader(VFile chunkDirectory) {
+		this.chunkDirectory = chunkDirectory;
+	}
+
+	@Override
+	public Chunk loadChunk(World var1, int var2, int var3) throws IOException {
+		VFile file = new VFile(chunkDirectory, getChunkPath(var2, var3) + ".dat");
+		byte[] bytes = file.getAllBytes();
+		
+		if(bytes == null) {
+			return null;
+		}
+		
+		try {
+			NBTTagCompound nbt = CompressedStreamTools.decompress(bytes);
+			nbt = nbt.getCompoundTag("Level");
+			return readChunkFromNBT(var1, nbt, var2, var3);
+		}catch(Throwable t) {
+			file.delete();
+			System.err.println("Corrupted chunk has been deleted: [" + var2 + ", " + var3 + "]");
+			t.printStackTrace();
+			return null;
+		}
+	}
+
+	@Override
+	public void saveChunk(World var1, Chunk var2) throws MinecraftException, IOException {
+		
+		NBTTagCompound chunkFile = new NBTTagCompound();
+		this.writeChunkToNBT(var2, var1, chunkFile);
+		
+		byte[] save;
+		
+		try {
+			NBTTagCompound chunkFileSave = new NBTTagCompound();
+			chunkFileSave.setCompoundTag("Level", chunkFile);
+			save = CompressedStreamTools.compressChunk(chunkFileSave);
+		}catch(IOException e) {
+			System.err.println("Corrupted chunk could not be serialized: [" + var2.xPosition + ", " + var2.zPosition + "]");
+			return;
+		}
+		
+		VFile file = new VFile(chunkDirectory, getChunkPath(var2.xPosition, var2.zPosition) + ".dat");
+		
+		if(!file.setAllBytes(save)) {
+			System.err.println("Corrupted chunk could not be written: [" + var2.xPosition + ", " + var2.zPosition + "] to file \"" + file.toString() + "\")");
+		}
+		
+	}
+
+	@Override
+	public void saveExtraChunkData(World var1, Chunk var2) {
+		// ?
+	}
+
+	@Override
+	public void chunkTick() {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public void saveExtraData() {
+		// unused
+	}
+	
+	private Chunk readChunkFromNBT(World par1World, NBTTagCompound par2NBTTagCompound, int x, int z) {
+		int var3 = x; //par2NBTTagCompound.getInteger("xPos");
+		int var4 = z; //par2NBTTagCompound.getInteger("zPos");
+		Chunk var5 = new Chunk(par1World, var3, var4);
+		var5.heightMap = par2NBTTagCompound.getIntArray("HeightMap");
+		var5.isTerrainPopulated = par2NBTTagCompound.getBoolean("TerrainPopulated");
+		NBTTagList var6 = par2NBTTagCompound.getTagList("Sections");
+		byte var7 = 16;
+		ExtendedBlockStorage[] var8 = new ExtendedBlockStorage[var7];
+		boolean var9 = !par1World.provider.hasNoSky;
+
+		for (int var10 = 0; var10 < var6.tagCount(); ++var10) {
+			NBTTagCompound var11 = (NBTTagCompound) var6.tagAt(var10);
+			byte var12 = var11.getByte("Y");
+			ExtendedBlockStorage var13 = new ExtendedBlockStorage(var12 << 4, var9);
+			var13.setBlockLSBArray(var11.getByteArray("Blocks"));
+
+			if (var11.hasKey("Add")) {
+				var13.setBlockMSBArray(new NibbleArray(var11.getByteArray("Add"), 4));
+			}
+
+			var13.setBlockMetadataArray(new NibbleArray(var11.getByteArray("Data"), 4));
+			var13.setBlocklightArray(new NibbleArray(var11.getByteArray("BlockLight"), 4));
+
+			if (var9) {
+				var13.setSkylightArray(new NibbleArray(var11.getByteArray("SkyLight"), 4));
+			}
+
+			var13.removeInvalidBlocks();
+			var8[var12] = var13;
+		}
+
+		var5.setStorageArrays(var8);
+
+		if (par2NBTTagCompound.hasKey("Biomes")) {
+			var5.setBiomeArray(par2NBTTagCompound.getByteArray("Biomes"));
+		}
+
+		NBTTagList var17 = par2NBTTagCompound.getTagList("Entities");
+
+		if (var17 != null) {
+			for (int var18 = 0; var18 < var17.tagCount(); ++var18) {
+				NBTTagCompound var20 = (NBTTagCompound) var17.tagAt(var18);
+				Entity var22 = EntityList.createEntityFromNBT(var20, par1World);
+				var5.hasEntities = true;
+
+				if (var22 != null) {
+					var5.addEntity(var22);
+					Entity var14 = var22;
+
+					for (NBTTagCompound var15 = var20; var15.hasKey("Riding"); var15 = var15.getCompoundTag("Riding")) {
+						Entity var16 = EntityList.createEntityFromNBT(var15.getCompoundTag("Riding"), par1World);
+
+						if (var16 != null) {
+							var5.addEntity(var16);
+							var14.mountEntity(var16);
+						}
+
+						var14 = var16;
+					}
+				}
+			}
+		}
+
+		NBTTagList var19 = par2NBTTagCompound.getTagList("TileEntities");
+
+		if (var19 != null) {
+			for (int var21 = 0; var21 < var19.tagCount(); ++var21) {
+				NBTTagCompound var24 = (NBTTagCompound) var19.tagAt(var21);
+				TileEntity var26 = TileEntity.createAndLoadEntity(var24);
+
+				if (var26 != null) {
+					var5.addTileEntity(var26);
+				}
+			}
+		}
+
+		if (par2NBTTagCompound.hasKey("TileTicks")) {
+			NBTTagList var23 = par2NBTTagCompound.getTagList("TileTicks");
+
+			if (var23 != null) {
+				for (int var25 = 0; var25 < var23.tagCount(); ++var25) {
+					NBTTagCompound var27 = (NBTTagCompound) var23.tagAt(var25);
+					par1World.scheduleBlockUpdateFromLoad(var27.getInteger("x"), var27.getInteger("y"),
+							var27.getInteger("z"), var27.getInteger("i"), var27.getInteger("t"), var27.getInteger("p"));
+				}
+			}
+		}
+
+		return var5;
+	}
+	
+	private void writeChunkToNBT(Chunk par1Chunk, World par2World, NBTTagCompound par3NBTTagCompound) {
+		par3NBTTagCompound.setInteger("xPos", par1Chunk.xPosition);
+		par3NBTTagCompound.setInteger("zPos", par1Chunk.zPosition);
+		par3NBTTagCompound.setLong("LastUpdate", par2World.getTotalWorldTime());
+		par3NBTTagCompound.setIntArray("HeightMap", par1Chunk.heightMap);
+		par3NBTTagCompound.setBoolean("TerrainPopulated", par1Chunk.isTerrainPopulated);
+		ExtendedBlockStorage[] var4 = par1Chunk.getBlockStorageArray();
+		NBTTagList var5 = new NBTTagList("Sections");
+		boolean var6 = !par2World.provider.hasNoSky;
+		ExtendedBlockStorage[] var7 = var4;
+		int var8 = var4.length;
+		NBTTagCompound var11;
+
+		for (int var9 = 0; var9 < var8; ++var9) {
+			ExtendedBlockStorage var10 = var7[var9];
+
+			if (var10 != null) {
+				var11 = new NBTTagCompound();
+				var11.setByte("Y", (byte) (var10.getYLocation() >> 4 & 255));
+				var11.setByteArray("Blocks", var10.getBlockLSBArray());
+
+				if (var10.getBlockMSBArray() != null) {
+					var11.setByteArray("Add", var10.getBlockMSBArray().data);
+				}
+
+				var11.setByteArray("Data", var10.getMetadataArray().data);
+				var11.setByteArray("BlockLight", var10.getBlocklightArray().data);
+
+				if (var6) {
+					var11.setByteArray("SkyLight", var10.getSkylightArray().data);
+				} else {
+					var11.setByteArray("SkyLight", new byte[var10.getBlocklightArray().data.length]);
+				}
+
+				var5.appendTag(var11);
+			}
+		}
+
+		par3NBTTagCompound.setTag("Sections", var5);
+		par3NBTTagCompound.setByteArray("Biomes", par1Chunk.getBiomeArray());
+		par1Chunk.hasEntities = false;
+		NBTTagList var16 = new NBTTagList();
+		Iterator var18;
+
+		for (var8 = 0; var8 < par1Chunk.entityLists.length; ++var8) {
+			var18 = par1Chunk.entityLists[var8].iterator();
+
+			while (var18.hasNext()) {
+				Entity var20 = (Entity) var18.next();
+				var11 = new NBTTagCompound();
+
+				if (var20.addEntityID(var11)) {
+					par1Chunk.hasEntities = true;
+					var16.appendTag(var11);
+				}
+			}
+		}
+
+		par3NBTTagCompound.setTag("Entities", var16);
+		NBTTagList var17 = new NBTTagList();
+		var18 = par1Chunk.chunkTileEntityMap.values().iterator();
+
+		while (var18.hasNext()) {
+			TileEntity var21 = (TileEntity) var18.next();
+			var11 = new NBTTagCompound();
+			var21.writeToNBT(var11);
+			var17.appendTag(var11);
+		}
+
+		par3NBTTagCompound.setTag("TileEntities", var17);
+		List var19 = par2World.getPendingBlockUpdates(par1Chunk, false);
+
+		if (var19 != null) {
+			long var22 = par2World.getTotalWorldTime();
+			NBTTagList var12 = new NBTTagList();
+			Iterator var13 = var19.iterator();
+
+			while (var13.hasNext()) {
+				NextTickListEntry var14 = (NextTickListEntry) var13.next();
+				NBTTagCompound var15 = new NBTTagCompound();
+				var15.setInteger("i", var14.blockID);
+				var15.setInteger("x", var14.xCoord);
+				var15.setInteger("y", var14.yCoord);
+				var15.setInteger("z", var14.zCoord);
+				var15.setInteger("t", (int) (var14.scheduledTime - var22));
+				var15.setInteger("p", var14.field_82754_f);
+				var12.appendTag(var15);
+			}
+
+			par3NBTTagCompound.setTag("TileTicks", var12);
+		}
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/VFSIterator.java

@@ -0,0 +1,17 @@
+package net.lax1dude.eaglercraft.sp;
+
+public interface VFSIterator {
+	
+	public static class BreakLoop extends RuntimeException {
+		public BreakLoop() {
+			super("iterator loop break request");
+		}
+	}
+	
+	public default void end() {
+		throw new BreakLoop();
+	}
+	
+	public void next(VIteratorFile entry);
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/VFSSaveFormat.java

@@ -0,0 +1,39 @@
+package net.lax1dude.eaglercraft.sp;
+
+import net.minecraft.src.IProgressUpdate;
+import net.minecraft.src.ISaveFormat;
+import net.minecraft.src.ISaveHandler;
+
+public class VFSSaveFormat implements ISaveFormat {
+	
+	private VFSSaveHandler folder;
+	
+	public VFSSaveFormat(VFSSaveHandler dir) {
+		folder = dir;
+	}
+
+	@Override
+	public ISaveHandler getSaveLoader(String var1, boolean var2) {
+		return folder;
+	}
+
+	@Override
+	public void flushCache() {
+	}
+
+	@Override
+	public boolean deleteWorldDirectory(String var1) {
+		return true;
+	}
+
+	@Override
+	public boolean isOldMapFormat(String var1) {
+		return false;
+	}
+
+	@Override
+	public boolean convertMapFormat(String var1, IProgressUpdate var2) {
+		return false;
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/VFSSaveHandler.java

@@ -0,0 +1,172 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.IOException;
+import java.util.HashMap;
+
+import net.minecraft.src.CompressedStreamTools;
+import net.minecraft.src.EntityPlayer;
+import net.minecraft.src.IChunkLoader;
+import net.minecraft.src.IPlayerFileData;
+import net.minecraft.src.ISaveHandler;
+import net.minecraft.src.MinecraftException;
+import net.minecraft.src.NBTTagCompound;
+import net.minecraft.src.WorldInfo;
+import net.minecraft.src.WorldProvider;
+
+public class VFSSaveHandler implements ISaveHandler, IPlayerFileData {
+	
+	public final VFile worldDirectory;
+	
+	private final HashMap<Integer, VFSChunkLoader> chunkLoaders = new HashMap<>();
+	
+	public VFSSaveHandler(VFile worldDirectory) {
+		this.worldDirectory = worldDirectory;
+	}
+
+	@Override
+	public WorldInfo loadWorldInfo() {
+		
+		byte[] level_dat_bin = (new VFile(worldDirectory, "level.dat")).getAllBytes();
+		
+		if(level_dat_bin == null) {
+			return null;
+		}
+		
+		try {
+			NBTTagCompound level_dat = CompressedStreamTools.decompress(level_dat_bin);
+			return new WorldInfo(level_dat.getCompoundTag("Data"));
+		}catch(Throwable t) {
+			System.err.println("Could not parse level.dat!");
+			t.printStackTrace();
+		}
+		
+		return null;
+	}
+
+	@Override
+	public void checkSessionLock() throws MinecraftException {
+		// no
+	}
+
+	@Override
+	public IChunkLoader getChunkLoader(WorldProvider var1) {
+		VFSChunkLoader loader = chunkLoaders.get(var1.dimensionId);
+		
+		if(loader == null) {
+			loader = new VFSChunkLoader(new VFile(worldDirectory, "level" + var1.dimensionId));
+			chunkLoaders.put(var1.dimensionId, loader);
+		}
+		
+		return loader;
+	}
+
+	@Override
+	public void saveWorldInfoWithPlayer(WorldInfo var1, NBTTagCompound var2) {
+		NBTTagCompound var3 = var2 != null ? var1.cloneNBTCompound(var2) : var1.getNBTTagCompound();
+		NBTTagCompound var4 = new NBTTagCompound();
+		var4.setTag("Data", var3);
+		
+		VFile level_dat = new VFile(worldDirectory, "level.dat");
+		
+		byte[] compressed;
+		
+		try {
+			compressed = CompressedStreamTools.compress(var4);
+		}catch(IOException e) {
+			System.err.println("Could not serialize \"" + level_dat + "\"");
+			e.printStackTrace();
+			return;
+		}
+		
+		if(!level_dat.setAllBytes(compressed)) {
+			System.err.println("Could not save \"" + level_dat + "\" to filesystem");
+		}
+	}
+
+	@Override
+	public void saveWorldInfo(WorldInfo var1) {
+		saveWorldInfoWithPlayer(var1, null);
+	}
+
+	@Override
+	public IPlayerFileData getPlayerNBTManager() {
+		return this;
+	}
+
+	@Override
+	public void flush() {
+		
+	}
+
+	@Override
+	public VFile getMapFileFromName(String var1) {
+		return new VFile(worldDirectory, "data", var1 + ".dat");
+	}
+
+	@Override
+	public String getWorldDirectoryName() {
+		return worldDirectory.toString();
+	}
+
+	@Override
+	public void writePlayerData(EntityPlayer var1) {
+		NBTTagCompound var2 = new NBTTagCompound();
+		var1.writeToNBT(var2);
+		
+		byte[] bin;
+		
+		try {
+			bin = CompressedStreamTools.compress(var2);
+		}catch(Throwable t) {
+			System.err.println("Could not serialize player data for \"" + var1.username + "\"");
+			t.printStackTrace();
+			return;
+		}
+		
+		VFile playerData = new VFile(worldDirectory, "player", var1.username.toLowerCase() + ".dat");
+		
+		if(!playerData.setAllBytes(bin)) {
+			System.err.println("Could not write player data for \"" + var1.username + "\" to file \"" + playerData.toString() + "\"");
+		}
+	}
+
+	@Override
+	public NBTTagCompound readPlayerData(EntityPlayer var1) {
+		VFile playerData = new VFile(worldDirectory, "player", var1.username.toLowerCase() + ".dat");
+		
+		NBTTagCompound ret = null;
+		
+		byte[] playerBin = playerData.getAllBytes();
+		if(playerBin != null) {
+			try {
+				ret = CompressedStreamTools.decompress(playerBin);
+				var1.readFromNBT(ret);
+			}catch(IOException e) {
+				System.err.println("Could not deserialize player data for \"" + var1.username + "\"");
+				e.printStackTrace();
+			}
+		}
+		
+		return ret;
+	}
+
+	@Override
+	public String[] getAvailablePlayerDat() {
+		return null;
+	}
+	
+	public static String worldNameToFolderName(String par1Str) {
+		par1Str = par1Str.replaceAll("[\\./\"]", "_");
+		
+		boolean shit = true;
+		while(shit) {
+			shit = (new VFile("worlds", par1Str, "level.dat")).exists();
+			if(shit) {
+				par1Str = par1Str + "_";
+			}
+		}
+
+		return par1Str;
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/VFSTestClass.java

@@ -0,0 +1,117 @@
+package net.lax1dude.eaglercraft.sp;
+
+public class VFSTestClass {
+	
+	public static void test(VirtualFilesystem vfs) {
+		/*
+		System.out.println("'test1' exists: " + vfs.getFile("test1").exists());
+		System.out.println("'test1' chars: " + vfs.getFile("test1").getAllChars());
+		System.out.println("'test2' chars: " + vfs.getFile("test2").getAllChars());
+		System.out.println("'test3' chars: " + vfs.getFile("test3").getAllChars());
+		System.out.println("'test2' exists: " + vfs.getFile("test2").exists());
+		System.out.println("'test3' exists: " + vfs.getFile("test3").exists());
+
+		System.out.println("'test1' set chars 'test string 1': " + vfs.getFile("test1").setAllChars("test string 1"));
+		System.out.println("'test2' set chars 'test string 2': " + vfs.getFile("test2").setAllChars("test string 2"));
+		System.out.println("'test3' set chars 'test string 3': " + vfs.getFile("test3").setAllChars("test string 3"));
+
+		System.out.println("'test1' exists: " + vfs.getFile("test1").exists());
+		System.out.println("'test2' exists: " + vfs.getFile("test2").exists());
+		System.out.println("'test3' exists: " + vfs.getFile("test3").exists());
+
+		System.out.println("'test1' chars: " + vfs.getFile("test1").getAllChars());
+		System.out.println("'test2' chars: " + vfs.getFile("test2").getAllChars());
+		System.out.println("'test3' chars: " + vfs.getFile("test3").getAllChars());
+		
+		System.out.println("'test3' delete: " + vfs.getFile("test3").delete());
+		System.out.println("'test3' exists: " + vfs.getFile("test3").exists());
+		
+		System.out.println("'test2' delete: " + vfs.getFile("test2").delete());
+		System.out.println("'test2' chars: " + vfs.getFile("test2").getAllChars());
+
+		System.out.println("'test4' exists: " + vfs.getFile("test4").exists());
+		System.out.println("'test1' to 'test4' rename: " + vfs.getFile("test1").rename("test4"));
+		System.out.println("'test4' exists: " + vfs.getFile("test4").exists());
+		System.out.println("'test4' chars: " + vfs.getFile("test4").getAllChars());
+		System.out.println("'test1' exists: " + vfs.getFile("test1").exists());
+		System.out.println("'test4' to 'test1' rename: " + vfs.getFile("test4").rename("test1"));
+		System.out.println("'test4' exists: " + vfs.getFile("test4").exists());
+		System.out.println("'test4' chars: " + vfs.getFile("test4").getAllChars());
+		System.out.println("'test1' exists: " + vfs.getFile("test1").exists());
+		System.out.println("'test1' chars: " + vfs.getFile("test1").getAllChars());
+
+		System.out.println("'test1' cache get chars: " + vfs.getFile("test1", true).getAllChars());
+		System.out.println("'test1' cache exists: " + vfs.getFile("test1", true).exists());
+		System.out.println("'test1' cache delete: " + vfs.getFile("test1", true).delete());
+		System.out.println("'test1' cache exists: " + vfs.getFile("test1", true).exists());
+		System.out.println("'test1' cache get chars: " + vfs.getFile("test1", true).getAllChars());
+		
+		System.out.println("'test1' cache set chars 'test cache string 1': " + vfs.getFile("test1", true).setAllChars("test cache string 1"));
+		System.out.println("'test2' cache set chars 'test cache string 2': " + vfs.getFile("test2", true).setAllChars("test cache string 2"));
+		System.out.println("'test3' cache set chars 'test cache string 3': " + vfs.getFile("test3", true).setAllChars("test cache string 3"));
+		
+		System.out.println("'test1' cache chars: " + vfs.getFile("test1").getAllChars());
+		System.out.println("'test2' cache chars: " + vfs.getFile("test2").getAllChars());
+		System.out.println("'test3' cache chars: " + vfs.getFile("test3").getAllChars());
+		
+		System.out.println("'test1' cache copy chars: " + VirtualFilesystem.utf8(vfs.getFile("test1").getAllBytes(true)));
+		System.out.println("'test2' cache copy chars: " + VirtualFilesystem.utf8(vfs.getFile("test2").getAllBytes(true)));
+		System.out.println("'test3' cache copy chars: " + VirtualFilesystem.utf8(vfs.getFile("test3").getAllBytes(true)));
+		*/
+		
+		VFile f = new VFile("test1");
+		System.out.println(f);
+		
+		f = new VFile("/test1");
+		System.out.println(f);
+		
+		f = new VFile("/test2/");
+		System.out.println(f);
+		
+		f = new VFile("test2/");
+		System.out.println(f);
+		
+		f = new VFile("test2/teste");
+		System.out.println(f);
+		
+		f = new VFile("\\test2\\teste");
+		System.out.println(f);
+		
+		f = new VFile("\\test2\\teste\\..\\eag");
+		System.out.println(f);
+		
+		f = new VFile("test2", "teste", "eag");
+		System.out.println(f);
+		
+		f = new VFile(f, "../", "test2", "teste", "eag");
+		System.out.println(f);
+		
+		f = new VFile(f, "../../", "test2", ".", "eag");
+		System.out.println(f);
+		
+		f = new VFile("you/eag", f);
+		System.out.println(f);
+		
+		f = new VFile(" you/ eag ", f);
+		System.out.println(f);
+		
+		f = new VFile("\\yee\\", f);
+		System.out.println(f);
+		
+		f = new VFile("\\yee\\", "yeeler", f, new VFile("yee"));
+		System.out.println(f);
+		
+		f = new VFile(f, new VFile("yee2"));
+		System.out.println(f);
+		
+		f = new VFile("yee/deevler/", new VFile("yee2"));
+		System.out.println(f);
+		
+		f = new VFile("yee/../../../../", new VFile("yee2"));
+		System.out.println(f);
+		
+		f = new VFile("yee/../../deevler../../", new VFile("yee2"));
+		System.out.println(f);
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/VFile.java

@@ -0,0 +1,227 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class VFile {
+
+	public static final String pathSeperator = "/";
+	public static final String[] altPathSeperator = new String[] { "\\" };
+	
+	public static String normalizePath(String p) {
+		for(int i = 0; i < altPathSeperator.length; ++i) {
+			p = p.replace(altPathSeperator[i], pathSeperator);
+		}
+		if(p.startsWith(pathSeperator)) {
+			p = p.substring(1);
+		}
+		if(p.endsWith(pathSeperator)) {
+			p = p.substring(0, p.length() - pathSeperator.length());
+		}
+		return p;
+	}
+	
+	public static String[] splitPath(String p) {
+		String[] pth = normalizePath(p).split(pathSeperator);
+		for(int i = 0; i < pth.length; ++i) {
+			pth[i] = pth[i].trim();
+		}
+		return pth;
+	}
+	
+	protected String path;
+	
+	public static String createPath(Object... p) {
+		ArrayList<String> r = new ArrayList<>();
+		for(int i = 0; i < p.length; ++i) {
+			if(p[i] == null) {
+				continue;
+			}
+			String gg = p[i].toString();
+			if(gg == null) {
+				continue;
+			}
+			String[] parts = splitPath(gg);
+			for(int j = 0; j < parts.length; ++j) {
+				if(parts[j] == null || parts[j].equals(".")) {
+					continue;
+				}else if(parts[j].equals("..") && r.size() > 0) {
+					int k = r.size() - 1;
+					if(!r.get(k).equals("..")) {
+						r.remove(k);
+					}else {
+						r.add("..");
+					}
+				}else {
+					r.add(parts[j]);
+				}
+			}
+		}
+		if(r.size() > 0) {
+			StringBuilder s = new StringBuilder();
+			for(int i = 0; i < r.size(); ++i) {
+				if(i > 0) {
+					s.append(pathSeperator);
+				}
+				s.append(r.get(i));
+			}
+			return s.toString();
+		}else {
+			return null;
+		}
+	}
+	
+	public VFile(Object... p) {
+		this.path = createPath(p);
+	}
+	
+	public InputStream getInputStream() {
+		return isRelative() ? null : SYS.VFS.getFile(path).getInputStream();
+	}
+	
+	public OutputStream getOutputStream() {
+		return isRelative() ? null : SYS.VFS.getFile(path).getOutputStream();
+	}
+	
+	public String toString() {
+		return path;
+	}
+	
+	public boolean isRelative() {
+		return path == null || path.contains("..");
+	}
+	
+	public boolean canRead() {
+		return !isRelative() && SYS.VFS.fileExists(path);
+	}
+	
+	public String getPath() {
+		return path.equals("unnamed") ? null : path;
+	}
+	
+	public String getName() {
+		if(path == null) {
+			return null;
+		}
+		int i = path.lastIndexOf(pathSeperator);
+		return i == -1 ? path : path.substring(i + 1);
+	}
+	
+	public boolean canWrite() {
+		return !isRelative();
+	}
+	
+	public String getParent() {
+		if(path == null) {
+			return null;
+		}
+		int i = path.indexOf(pathSeperator);
+		return i == -1 ? ".." : path.substring(0, i);
+	}
+	
+	public int hashCode() {
+		return path == null ? 0 : path.hashCode();
+	}
+	
+	public boolean equals(Object o) {
+		return path != null && o != null && (o instanceof VFile) && path.equals(((VFile)o).path);
+	}
+	
+	public boolean exists() {
+		return !isRelative() && SYS.VFS.fileExists(path);
+	}
+	
+	public boolean delete() {
+		return !isRelative() && SYS.VFS.deleteFile(path);
+	}
+	
+	public boolean renameTo(String p, boolean copy) {
+		if(!isRelative() && SYS.VFS.renameFile(path, p, copy)) {
+			path = p;
+			return true;
+		}
+		return false;
+	}
+	
+	public int length() {
+		return isRelative() ? -1 : SYS.VFS.getFile(path).getSize();
+	}
+	
+	public void getBytes(int fileOffset, byte[] array, int offset, int length) {
+		if(isRelative()) {
+			throw new ArrayIndexOutOfBoundsException("File is relative");
+		}
+		SYS.VFS.getFile(path).getBytes(fileOffset, array, offset, length);
+	}
+	
+	public void setCacheEnabled() {
+		if(isRelative()) {
+			throw new RuntimeException("File is relative");
+		}
+		SYS.VFS.getFile(path).setCacheEnabled();
+	}
+	
+	public byte[] getAllBytes() {
+		if(isRelative()) {
+			return null;
+		}
+		return SYS.VFS.getFile(path).getAllBytes();
+	}
+	
+	public String getAllChars() {
+		if(isRelative()) {
+			return null;
+		}
+		return SYS.VFS.getFile(path).getAllChars();
+	}
+	
+	public String[] getAllLines() {
+		if(isRelative()) {
+			return null;
+		}
+		return SYS.VFS.getFile(path).getAllLines();
+	}
+	
+	public byte[] getAllBytes(boolean copy) {
+		if(isRelative()) {
+			return null;
+		}
+		return SYS.VFS.getFile(path).getAllBytes(copy);
+	}
+	
+	public boolean setAllChars(String bytes) {
+		if(isRelative()) {
+			return false;
+		}
+		return SYS.VFS.getFile(path).setAllChars(bytes);
+	}
+	
+	public boolean setAllBytes(byte[] bytes) {
+		if(isRelative()) {
+			return false;
+		}
+		return SYS.VFS.getFile(path).setAllBytes(bytes);
+	}
+	
+	public boolean setAllBytes(byte[] bytes, boolean copy) {
+		if(isRelative()) {
+			return false;
+		}
+		return SYS.VFS.getFile(path).setAllBytes(bytes, copy);
+	}
+	
+	public List<String> list() {
+		if(isRelative()) {
+			return Arrays.asList(path);
+		}
+		return SYS.VFS.listFiles(path);
+	}
+	
+	public int deleteAll() {
+		return isRelative() ? 0 : SYS.VFS.deleteFiles(path);
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/VIteratorFile.java

@@ -0,0 +1,289 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.List;
+
+import org.teavm.interop.Async;
+import org.teavm.interop.AsyncCallback;
+import org.teavm.jso.JSBody;
+import org.teavm.jso.JSObject;
+import org.teavm.jso.dom.events.Event;
+import org.teavm.jso.dom.events.EventListener;
+import org.teavm.jso.indexeddb.IDBCursor;
+import org.teavm.jso.indexeddb.IDBRequest;
+import org.teavm.jso.typedarrays.ArrayBuffer;
+import org.teavm.jso.typedarrays.Uint8Array;
+
+/**
+ * Do not use an instance of this class outside of the VFSIterator.next() method
+ */
+public class VIteratorFile extends VFile {
+	
+	static final VIteratorFile instance = new VIteratorFile();
+	
+	private VIteratorFile() {
+		super("");
+		this.idx = -1;
+		this.cur = null;
+		this.vfs = null;
+	}
+	
+	private static class VirtualIteratorOutputStream extends ByteArrayOutputStream {
+		
+		private final VIteratorFile itr;
+		
+		protected VirtualIteratorOutputStream(VIteratorFile itr) {
+			this.itr = itr;
+		}
+		
+		public void close() throws IOException {
+			if(!itr.setAllBytes(super.toByteArray(), false)) {
+				throw new IOException("Could not close stream and write to \"" + itr.path + "\" on VFS \"" + itr.vfs.database + "\" (the file was probably deleted)");
+			}
+		}
+		
+	}
+	
+	private int idx;
+	private IDBCursor cur;
+	private VirtualFilesystem vfs;
+	private boolean wasDeleted;
+	
+	@JSBody(params = { "k" }, script = "return ((typeof k) === \"string\") ? k : (((typeof k) === \"undefined\") ? null : (((typeof k[0]) === \"string\") ? k[0] : null));")
+	private static native String readKey(JSObject k);
+	
+	static VIteratorFile create(int idx, VirtualFilesystem vfs, IDBCursor cur) {
+		String k = readKey(cur.getKey());
+		if(k == null) {
+			return null;
+		}
+		instance.update(idx, k, vfs, cur);
+		return instance;
+	}
+	
+	public VFile makeVFile() {
+		return new VFile(path);
+	}
+	
+	private void update(int idx, String path, VirtualFilesystem vfs, IDBCursor cur) {
+		this.idx = idx;
+		this.path = path;
+		this.vfs =  vfs;
+		this.cur = cur;
+		this.wasDeleted = false;
+	}
+	
+	public InputStream getInputStream() {
+		return !wasDeleted ? new ByteArrayInputStream(getAllBytes()) : null;
+	}
+	
+	public OutputStream getOutputStream() {
+		return !wasDeleted ? new VirtualIteratorOutputStream(this) : null;
+	}
+	
+	public String toString() {
+		return path;
+	}
+	
+	public boolean isRelative() {
+		return false;
+	}
+	
+	public boolean canRead() {
+		return !wasDeleted;
+	}
+	
+	public String getPath() {
+		return path;
+	}
+	
+	public String getName() {
+		if(path == null) {
+			return null;
+		}
+		int i = path.indexOf(pathSeperator);
+		return i == -1 ? path : path.substring(i + 1);
+	}
+	
+	public boolean canWrite() {
+		return !wasDeleted;
+	}
+	
+	public String getParent() {
+		if(path == null) {
+			return null;
+		}
+		int i = path.indexOf(pathSeperator);
+		return i == -1 ? ".." : path.substring(0, i);
+	}
+	
+	public int hashCode() {
+		return path == null ? 0 : path.hashCode();
+	}
+	
+	public boolean equals(Object o) {
+		return path != null && o != null && (o instanceof VFile) && path.equals(((VFile)o).path);
+	}
+	
+	public boolean exists() {
+		return !wasDeleted;
+	}
+	
+	public boolean delete() {
+		return wasDeleted = AsyncHandlers.awaitRequest(cur.delete()).bool;
+	}
+	
+	public boolean renameTo(String p) {
+		byte[] data = getAllBytes();
+		String op = path;
+		path = p;
+		if(!setAllBytes(data)) {
+			path = op;
+			return false;
+		}
+		path = op;
+		if(!delete()) {
+			return false;
+		}
+		path = p;
+		return true;
+	}
+	
+	public int length() {
+		JSObject obj = cur.getValue();
+		
+		if(obj == null) {
+			throw new RuntimeException("Value of entry is missing");
+		}
+		
+		ArrayBuffer arr = readRow(obj);
+	
+		if(arr == null) {
+			throw new RuntimeException("Value of the fucking value of the entry is missing");
+		}
+		
+		return arr.getByteLength();
+	}
+	
+	public void getBytes(int fileOffset, byte[] array, int offset, int length) {
+		JSObject obj = cur.getValue();
+		
+		if(obj == null) {
+			throw new ArrayIndexOutOfBoundsException("Value of entry is missing");
+		}
+		
+		ArrayBuffer arr = readRow(obj);
+
+		if(arr == null) {
+			throw new ArrayIndexOutOfBoundsException("Value of the fucking value of the entry is missing");
+		}
+		
+		Uint8Array a = new Uint8Array(arr);
+		
+		if(a.getLength() < fileOffset + length) {
+			throw new ArrayIndexOutOfBoundsException("file '" + path + "' size was "+a.getLength()+" but user tried to read index "+(fileOffset + length - 1));
+		}
+		
+		for(int i = 0; i < length; ++i) {
+			array[i + offset] = (byte)a.get(i + fileOffset);
+		}
+	}
+	
+	public void setCacheEnabled() {
+		// no
+	}
+	
+	@JSBody(params = { "obj" }, script = "return (typeof obj === 'undefined') ? null : ((typeof obj.data === 'undefined') ? null : obj.data);")
+	private static native ArrayBuffer readRow(JSObject obj);
+	
+	public byte[] getAllBytes() {
+		JSObject obj = cur.getValue();
+		
+		if(obj == null) {
+			return null;
+		}
+		
+		ArrayBuffer arr = readRow(obj);
+
+		if(arr == null) {
+			return null;
+		}
+		
+		Uint8Array a = new Uint8Array(arr);
+		int ii = a.getByteLength();
+		
+		byte[] array = new byte[ii];
+		for(int i = 0; i < ii; ++i) {
+			array[i] = (byte)a.get(i);
+		}
+		
+		return array;
+	}
+	
+	public String getAllChars() {
+		return VirtualFilesystem.utf8(getAllBytes());
+	}
+	
+	public String[] getAllLines() {
+		return VirtualFilesystem.lines(VirtualFilesystem.utf8(getAllBytes()));
+	}
+	
+	public byte[] getAllBytes(boolean copy) {
+		return getAllBytes();
+	}
+	
+	public boolean setAllChars(String bytes) {
+		return setAllBytes(VirtualFilesystem.utf8(bytes));
+	}
+	
+	public List<String> list() {
+		throw new RuntimeException("Cannot perform list all in VFS callback");
+	}
+	
+	public int deleteAll() {
+		throw new RuntimeException("Cannot perform delete all in VFS callback");
+	}
+	
+	@JSBody(params = { "pat", "dat" }, script = "return { path: pat, data: dat };")
+	private static native JSObject writeRow(String name, ArrayBuffer data);
+	
+	public boolean setAllBytes(byte[] bytes) {
+		ArrayBuffer a = new ArrayBuffer(bytes.length);
+		Uint8Array ar = new Uint8Array(a);
+		ar.set(bytes);
+		JSObject obj = writeRow(path, a);
+		BooleanResult r = AsyncHandlers.awaitRequest(cur.update(obj));
+		return r.bool;
+	}
+	
+	public boolean setAllBytes(byte[] bytes, boolean copy) {
+		return setAllBytes(bytes);
+	}
+	
+	public static class AsyncHandlers {
+		
+		@Async
+		public static native BooleanResult awaitRequest(IDBRequest r);
+		
+		private static void awaitRequest(IDBRequest r, final AsyncCallback<BooleanResult> cb) {
+			r.addEventListener("success", new EventListener<Event>() {
+				@Override
+				public void handleEvent(Event evt) {
+					cb.complete(BooleanResult._new(true));
+				}
+			});
+			r.addEventListener("error", new EventListener<Event>() {
+				@Override
+				public void handleEvent(Event evt) {
+					cb.complete(BooleanResult._new(false));
+				}
+			});
+		}
+		
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/VirtualFilesystem.java

@@ -0,0 +1,688 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.charset.Charset;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+
+import org.teavm.interop.Async;
+import org.teavm.interop.AsyncCallback;
+import org.teavm.jso.JSBody;
+import org.teavm.jso.JSObject;
+import org.teavm.jso.dom.events.EventListener;
+import org.teavm.jso.indexeddb.EventHandler;
+import org.teavm.jso.indexeddb.IDBCountRequest;
+import org.teavm.jso.indexeddb.IDBCursor;
+import org.teavm.jso.indexeddb.IDBCursorRequest;
+import org.teavm.jso.indexeddb.IDBDatabase;
+import org.teavm.jso.indexeddb.IDBFactory;
+import org.teavm.jso.indexeddb.IDBGetRequest;
+import org.teavm.jso.indexeddb.IDBObjectStoreParameters;
+import org.teavm.jso.indexeddb.IDBOpenDBRequest;
+import org.teavm.jso.indexeddb.IDBRequest;
+import org.teavm.jso.indexeddb.IDBTransaction;
+import org.teavm.jso.indexeddb.IDBVersionChangeEvent;
+import org.teavm.jso.typedarrays.ArrayBuffer;
+import org.teavm.jso.typedarrays.Int8Array;
+import org.teavm.jso.typedarrays.Uint8Array;
+
+public class VirtualFilesystem {
+	
+	protected static class VirtualOutputStream extends ByteArrayOutputStream {
+		private final VFSFile file;
+		
+		protected VirtualOutputStream(VFSFile file) {
+			this.file = file;
+		}
+
+		public void close() throws IOException {
+			if(!file.setAllBytes(super.toByteArray(), false)) {
+				throw new IOException("Could not close stream and write to \"" + file.filePath + "\" on VFS \"" + file.virtualFilesystem.database + "\" (the file was probably deleted)");
+			}
+		}
+	}
+	
+	public static class VFSFile {
+
+		public final VirtualFilesystem virtualFilesystem;
+		protected boolean cacheEnabled;
+		protected String filePath;
+		protected int fileSize = -1;
+		protected boolean hasBeenDeleted = false;
+		protected boolean hasBeenAccessed = false;
+		protected boolean exists = false;
+
+		protected byte[] cache = null;
+		protected long cacheHit;
+		
+		protected VFSFile(VirtualFilesystem vfs, String filePath, boolean cacheEnabled) {
+			this.virtualFilesystem = vfs;
+			this.filePath = filePath;
+			this.cacheHit = SysUtil.steadyTimeMillis();
+			if(cacheEnabled) {
+				setCacheEnabled();
+			}
+		}
+		
+		public boolean equals(Object o) {
+			return (o instanceof VFSFile) && ((VFSFile)o).filePath.equals(filePath);
+		}
+		
+		public int hashCode() {
+			return filePath.hashCode();
+		}
+		
+		public String getPath() {
+			return filePath;
+		}
+		
+		public int getSize() {
+			cacheHit = SysUtil.steadyTimeMillis();
+			if(fileSize < 0) {
+				if(cacheEnabled) {
+					byte[] b = getAllBytes(false);
+					if(b != null) {
+						fileSize = b.length;
+					}
+				}else {
+					ArrayBuffer dat = AsyncHandlers.readWholeFile(virtualFilesystem.indexeddb, filePath);
+					if(dat != null) {
+						fileSize = dat.getByteLength();
+					}
+				}
+			}
+			return fileSize;
+		}
+		
+		public InputStream getInputStream() {
+			byte[] dat = getAllBytes(false);
+			if(dat == null) {
+				return null;
+			}
+			return new ByteArrayInputStream(dat);
+		}
+		
+		public OutputStream getOutputStream() {
+			return new VirtualOutputStream(this);
+		}
+		
+		public void getBytes(int fileOffset, byte[] array, int offset, int length) {
+			if(hasBeenDeleted) {
+				throw new ArrayIndexOutOfBoundsException("file '" + filePath + "' has been deleted");
+			}else if(hasBeenAccessed && !exists) {
+				throw new ArrayIndexOutOfBoundsException("file '" + filePath + "' does not exist");
+			}
+			cacheHit = SysUtil.steadyTimeMillis();
+			if(cacheEnabled && cache != null) {
+				System.arraycopy(cache, fileOffset, array, offset, length);
+			}else {
+				ArrayBuffer aa = AsyncHandlers.readWholeFile(virtualFilesystem.indexeddb, filePath);
+				hasBeenAccessed = true;
+				if(aa != null) {
+					exists = true;
+				}else {
+					exists = false;
+					throw new ArrayIndexOutOfBoundsException("file '" + filePath + "' does not exist");
+				}
+				this.fileSize = aa.getByteLength();
+				if(cacheEnabled) {
+					cache = TeaVMUtils.wrapByteArrayBuffer(aa);
+				}
+				if(fileSize < fileOffset + length) {
+					throw new ArrayIndexOutOfBoundsException("file '" + filePath + "' size was "+fileSize+" but user tried to read index "+(fileOffset + length - 1));
+				}
+				TeaVMUtils.unwrapByteArray(array).set(new Int8Array(aa, fileOffset, length), offset);
+			}
+		}
+		
+		public void setCacheEnabled() {
+			if(!cacheEnabled && !hasBeenDeleted && !(hasBeenAccessed && !exists)) {
+				cacheHit = SysUtil.steadyTimeMillis();
+				cache = getAllBytes(false);
+				cacheEnabled = true;
+			}
+		}
+		
+		public byte[] getAllBytes() {
+			return getAllBytes(false);
+		}
+		
+		public String getAllChars() {
+			return utf8(getAllBytes(false));
+		}
+		
+		public String[] getAllLines() {
+			return lines(getAllChars());
+		}
+		
+		public byte[] getAllBytes(boolean copy) {
+			if(hasBeenDeleted || (hasBeenAccessed && !exists)) {
+				return null;
+			}
+			cacheHit = SysUtil.steadyTimeMillis();
+			if(cacheEnabled && cache != null) {
+				byte[] b = cache;
+				if(copy) {
+					b = new byte[cache.length];
+					System.arraycopy(cache, 0, b, 0, cache.length);
+				}
+				return b;
+			}else {
+				hasBeenAccessed = true;
+				ArrayBuffer b = AsyncHandlers.readWholeFile(virtualFilesystem.indexeddb, filePath);
+				if(b != null) {
+					exists = true;
+				}else {
+					exists = false;
+					return null;
+				}
+				this.fileSize = b.getByteLength();
+				if(cacheEnabled) {
+					if(copy) {
+						cache = new byte[fileSize];
+						TeaVMUtils.unwrapByteArray(cache).set(new Int8Array(b));
+					}else {
+						cache = TeaVMUtils.wrapByteArrayBuffer(b);
+					}
+				}
+				return TeaVMUtils.wrapByteArrayBuffer(b);
+			}
+		}
+		
+		public boolean setAllChars(String bytes) {
+			return setAllBytes(utf8(bytes), true);
+		}
+		
+		public boolean setAllBytes(byte[] bytes) {
+			return setAllBytes(bytes, true);
+		}
+		
+		public boolean setAllBytes(byte[] bytes, boolean copy) {
+			if(hasBeenDeleted || bytes == null) {
+				return false;
+			}
+			cacheHit = SysUtil.steadyTimeMillis();
+			this.fileSize = bytes.length;
+			if(cacheEnabled) {
+				byte[] copz = bytes;
+				if(copy) {
+					copz = new byte[bytes.length];
+					System.arraycopy(bytes, 0, copz, 0, bytes.length);
+				}
+				cache = copz;
+				return sync();
+			}else {
+				boolean s = AsyncHandlers.writeWholeFile(virtualFilesystem.indexeddb, filePath,
+						TeaVMUtils.unwrapArrayBuffer(bytes)).bool;
+				hasBeenAccessed = true;
+				exists = exists || s;
+				return s;
+			}
+		}
+		
+		public boolean sync() {
+			if(cacheEnabled && cache != null && !hasBeenDeleted) {
+				cacheHit = SysUtil.steadyTimeMillis();
+				boolean tryWrite = AsyncHandlers.writeWholeFile(virtualFilesystem.indexeddb, filePath,
+						TeaVMUtils.unwrapArrayBuffer(cache)).bool;
+				hasBeenAccessed = true;
+				exists = exists || tryWrite;
+				return tryWrite;
+			}
+			return false;
+		}
+		
+		public boolean delete() {
+			if(!hasBeenDeleted && !(hasBeenAccessed && !exists)) {
+				cacheHit = SysUtil.steadyTimeMillis();
+				if(!AsyncHandlers.deleteFile(virtualFilesystem.indexeddb, filePath).bool) {
+					hasBeenAccessed = true;
+					return false;
+				}
+				virtualFilesystem.fileMap.remove(filePath);
+				hasBeenDeleted = true;
+				hasBeenAccessed = true;
+				exists = false;
+				return true;
+			}
+			return false;
+		}
+		
+		public boolean rename(String newName, boolean copy) {
+			if(!hasBeenDeleted && !(hasBeenAccessed && !exists)) {
+				cacheHit = SysUtil.steadyTimeMillis();
+				ArrayBuffer arr = AsyncHandlers.readWholeFile(virtualFilesystem.indexeddb, filePath);
+				hasBeenAccessed = true;
+				if(arr != null) {
+					exists = true;
+					if(!AsyncHandlers.writeWholeFile(virtualFilesystem.indexeddb, newName, arr).bool) {
+						return false;
+					}
+					if(!copy && !AsyncHandlers.deleteFile(virtualFilesystem.indexeddb, filePath).bool) {
+						return false;
+					}
+				}else {
+					exists = false;
+				}
+				if(!copy) {
+					virtualFilesystem.fileMap.remove(filePath);
+					filePath = newName;
+					virtualFilesystem.fileMap.put(newName, this);
+				}
+				return true;
+			}
+			return false;
+		}
+		
+		public boolean exists() {
+			if(hasBeenDeleted) {
+				return false;
+			}
+			cacheHit = SysUtil.steadyTimeMillis();
+			if(hasBeenAccessed) {
+				return exists;
+			}
+			exists = AsyncHandlers.fileExists(virtualFilesystem.indexeddb, filePath).bool;
+			hasBeenAccessed = true;
+			return exists;
+		}
+		
+	}
+
+	private final HashMap<String, VFSFile> fileMap = new HashMap<>();
+	
+	public final String database;
+	private final IDBDatabase indexeddb;
+	
+	public static class VFSHandle {
+		
+		public final boolean failedInit;
+		public final boolean failedLocked;
+		public final String failedError;
+		public final VirtualFilesystem vfs;
+		
+		public VFSHandle(boolean init, boolean locked, String error, VirtualFilesystem db) {
+			failedInit = init;
+			failedLocked = locked;
+			failedError = error;
+			vfs = db;
+		}
+		
+		public String toString() {
+			if(failedInit) {
+				return "IDBFactory threw an exception, IndexedDB is most likely not supported in this browser." + (failedError == null ? "" : "\n\n" + failedError);
+			}
+			if(failedLocked) {
+				return "The filesystem requested is already in use on a different tab.";
+			}
+			if(failedError != null) {
+				return "The IDBFactory.open() request failed, reason: " + failedError;
+			}
+			return "Virtual Filesystem Object: " + vfs.database;
+		}
+		
+	}
+	
+	public static VFSHandle openVFS(String db) {
+		DatabaseOpen evt = AsyncHandlers.openDB(db);
+		if(evt.failedInit) {
+			return new VFSHandle(true, false, evt.failedError, null);
+		}
+		if(evt.failedLocked) {
+			return new VFSHandle(false, true, null, null);
+		}
+		if(evt.failedError != null) {
+			return new VFSHandle(false, false, evt.failedError, null);
+		}
+		return new VFSHandle(false, false, null, new VirtualFilesystem(db, evt.database));
+	}
+	
+	private VirtualFilesystem(String db, IDBDatabase idb) {
+		database = db;
+		indexeddb = idb;
+	}
+	
+	public void close() {
+		indexeddb.close();
+	}
+	
+	public VFSFile getFile(String path) {
+		return getFile(path, false);
+	}
+	
+	public VFSFile getFile(String path, boolean cache) {
+		VFSFile f = fileMap.get(path);
+		if(f == null) {
+			fileMap.put(path, f = new VFSFile(this, path, cache));
+		}else {
+			if(cache) {
+				f.setCacheEnabled();
+			}
+		}
+		return f;
+	}
+	
+	public boolean renameFile(String oldName, String newName, boolean copy) {
+		return getFile(oldName).rename(newName, copy);
+	}
+	
+	public boolean deleteFile(String path) {
+		return getFile(path).delete();
+	}
+	
+	public boolean fileExists(String path) {
+		return getFile(path).exists();
+	}
+	
+	public List<String> listFiles(String prefix) {
+		final ArrayList<String> list = new ArrayList<>();
+		AsyncHandlers.iterateFiles(indexeddb, this, prefix, false, (v) -> {
+			list.add(v.getPath());
+		});
+		return list;
+	}
+	
+	public List<VFile> listVFiles(String prefix) {
+		final ArrayList<VFile> list = new ArrayList<>();
+		AsyncHandlers.iterateFiles(indexeddb, this, prefix, false, (v) -> {
+			list.add(new VFile(v.getPath()));
+		});
+		return list;
+	}
+	
+	public int deleteFiles(String prefix) {
+		return AsyncHandlers.deleteFiles(indexeddb, prefix);
+	}
+	
+	public int iterateFiles(String prefix, boolean rw, VFSIterator itr) {
+		return AsyncHandlers.iterateFiles(indexeddb, this, prefix, rw, itr);
+	}
+	
+	public int renameFiles(String oldPrefix, String newPrefix, boolean copy) {
+		List<String> filesToCopy = listFiles(oldPrefix);
+		int i = 0;
+		for(String str : filesToCopy) {
+			String f = VFile.createPath(newPrefix, str.substring(oldPrefix.length()));
+			if(!renameFile(str, f, copy)) {
+				System.err.println("Could not " + (copy ? "copy" : "rename") + " file \"" + str + "\" to \"" + f + "\" for some reason");
+			}else {
+				++i;
+			}
+		}
+		return i;
+	}
+	
+	public void flushCache(long age) {
+		long curr = SysUtil.steadyTimeMillis();
+		Iterator<VFSFile> files = fileMap.values().iterator();
+		while(files.hasNext()) {
+			if(curr - files.next().cacheHit > age) {
+				files.remove();
+			}
+		}
+	}
+	
+	protected static class DatabaseOpen {
+		
+		protected final boolean failedInit;
+		protected final boolean failedLocked;
+		protected final String failedError;
+		
+		protected final IDBDatabase database;
+		
+		protected DatabaseOpen(boolean init, boolean locked, String error, IDBDatabase db) {
+			failedInit = init;
+			failedLocked = locked;
+			failedError = error;
+			database = db;
+		}
+		
+	}
+	
+	@JSBody(script = "return ((typeof indexedDB) !== 'undefined') ? indexedDB : null;")
+	protected static native IDBFactory createIDBFactory();
+	
+	protected static class AsyncHandlers {
+		
+		@Async
+		protected static native DatabaseOpen openDB(String name);
+		
+		private static void openDB(String name, final AsyncCallback<DatabaseOpen> cb) {
+			IDBFactory i = createIDBFactory();
+			if(i == null) {
+				cb.complete(new DatabaseOpen(false, false, "window.indexedDB was null or undefined", null));
+				return;
+			}
+			final IDBOpenDBRequest f = i.open(name, 1);
+			f.setOnBlocked(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(new DatabaseOpen(false, true, null, null));
+				}
+			});
+			f.setOnSuccess(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(new DatabaseOpen(false, false, null, f.getResult()));
+				}
+			});
+			f.setOnError(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(new DatabaseOpen(false, false, "open error", null));
+				}
+			});
+			f.setOnUpgradeNeeded(new EventListener<IDBVersionChangeEvent>() {
+				@Override
+				public void handleEvent(IDBVersionChangeEvent evt) {
+					f.getResult().createObjectStore("filesystem", IDBObjectStoreParameters.create().keyPath("path"));
+				}
+			});
+		}
+		
+		@Async
+		protected static native BooleanResult deleteFile(IDBDatabase db, String name);
+		
+		private static void deleteFile(IDBDatabase db, String name, final AsyncCallback<BooleanResult> cb) {
+			IDBTransaction tx = db.transaction("filesystem", "readwrite");
+			final IDBRequest r = tx.objectStore("filesystem").delete(makeTheFuckingKeyWork(name));
+			
+			r.setOnSuccess(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(BooleanResult._new(true));
+				}
+			});
+			r.setOnError(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(BooleanResult._new(false));
+				}
+			});
+		}
+		
+		@JSBody(params = { "obj" }, script = "return (typeof obj === 'undefined') ? null : ((typeof obj.data === 'undefined') ? null : obj.data);")
+		protected static native ArrayBuffer readRow(JSObject obj);
+		
+		@JSBody(params = { "obj" }, script = "return [obj];")
+		private static native JSObject makeTheFuckingKeyWork(String k);
+		
+		@Async
+		protected static native ArrayBuffer readWholeFile(IDBDatabase db, String name);
+		
+		private static void readWholeFile(IDBDatabase db, String name, final AsyncCallback<ArrayBuffer> cb) {
+			IDBTransaction tx = db.transaction("filesystem", "readonly");
+			final IDBGetRequest r = tx.objectStore("filesystem").get(makeTheFuckingKeyWork(name));
+			r.setOnSuccess(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(readRow(r.getResult()));
+				}
+			});
+			r.setOnError(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(null);
+				}
+			});
+			
+		}
+		
+		@JSBody(params = { "k" }, script = "return ((typeof k) === \"string\") ? k : (((typeof k) === \"undefined\") ? null : (((typeof k[0]) === \"string\") ? k[0] : null));")
+		private static native String readKey(JSObject k);
+		
+		@JSBody(params = { "k" }, script = "return ((typeof k) === \"undefined\") ? null : (((typeof k.path) === \"undefined\") ? null : (((typeof k.path) === \"string\") ? k[0] : null));")
+		private static native String readRowKey(JSObject r);
+		
+		@Async
+		protected static native Integer iterateFiles(IDBDatabase db, final VirtualFilesystem vfs, final String prefix, boolean rw, final VFSIterator itr);
+		
+		private static void iterateFiles(IDBDatabase db, final VirtualFilesystem vfs, final String prefix, boolean rw, final VFSIterator itr, final AsyncCallback<Integer> cb) {
+			IDBTransaction tx = db.transaction("filesystem", rw ? "readwrite" : "readonly");
+			final IDBCursorRequest r = tx.objectStore("filesystem").openCursor();
+			final int[] res = new int[1];
+			r.setOnSuccess(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					IDBCursor c = r.getResult();
+					if(c == null || c.getKey() == null || c.getValue() == null) {
+						cb.complete(res[0]);
+						return;
+					}
+					String k = readKey(c.getKey());
+					if(k != null) {
+						if(k.startsWith(prefix)) {
+							int ci = res[0]++;
+							try {
+								itr.next(VIteratorFile.create(ci, vfs, c));
+							}catch(VFSIterator.BreakLoop ex) {
+								cb.complete(res[0]);
+								return;
+							}
+						}
+					}
+					c.doContinue();
+				}
+			});
+			r.setOnError(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(res[0] > 0 ? res[0] : -1);
+				}
+			});
+		}
+		
+		@Async
+		protected static native Integer deleteFiles(IDBDatabase db, final String prefix);
+		
+		private static void deleteFiles(IDBDatabase db, final String prefix, final AsyncCallback<Integer> cb) {
+			IDBTransaction tx = db.transaction("filesystem", "readwrite");
+			final IDBCursorRequest r = tx.objectStore("filesystem").openCursor();
+			final int[] res = new int[1];
+			r.setOnSuccess(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					IDBCursor c = r.getResult();
+					if(c == null || c.getKey() == null || c.getValue() == null) {
+						cb.complete(res[0]);
+						return;
+					}
+					String k = readKey(c.getKey());
+					if(k != null) {
+						if(k.startsWith(prefix)) {
+							c.delete();
+							++res[0];
+						}
+					}
+					c.doContinue();
+				}
+			});
+			r.setOnError(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(res[0] > 0 ? res[0] : -1);
+				}
+			});
+		}
+		
+		@Async
+		protected static native BooleanResult fileExists(IDBDatabase db, String name);
+		
+		private static void fileExists(IDBDatabase db, String name, final AsyncCallback<BooleanResult> cb) {
+			IDBTransaction tx = db.transaction("filesystem", "readonly");
+			final IDBCountRequest r = tx.objectStore("filesystem").count(makeTheFuckingKeyWork(name));
+			r.setOnSuccess(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(BooleanResult._new(r.getResult() > 0));
+				}
+			});
+			r.setOnError(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(BooleanResult._new(false));
+				}
+			});
+		}
+		
+		@JSBody(params = { "pat", "dat" }, script = "return { path: pat, data: dat };")
+		protected static native JSObject writeRow(String name, ArrayBuffer data);
+		
+		@Async
+		protected static native BooleanResult writeWholeFile(IDBDatabase db, String name, ArrayBuffer data);
+		
+		private static void writeWholeFile(IDBDatabase db, String name, ArrayBuffer data, final AsyncCallback<BooleanResult> cb) {
+			IDBTransaction tx = db.transaction("filesystem", "readwrite");
+			final IDBRequest r = tx.objectStore("filesystem").put(writeRow(name, data));
+			
+			r.setOnSuccess(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(BooleanResult._new(true));
+				}
+			});
+			r.setOnError(new EventHandler() {
+				@Override
+				public void handleEvent() {
+					cb.complete(BooleanResult._new(false));
+				}
+			});
+		}
+		
+	}
+	
+	public static byte[] utf8(String str) {
+		if(str == null) return null;
+		return str.getBytes(Charset.forName("UTF-8"));
+	}
+	
+	public static String utf8(byte[] str) {
+		if(str == null) return null;
+		return new String(str, Charset.forName("UTF-8"));
+	}
+	
+	public static String CRLFtoLF(String str) {
+		if(str == null) return null;
+		str = str.indexOf('\r') != -1 ? str.replace("\r", "") : str;
+		str = str.trim();
+		if(str.endsWith("\n")) {
+			str = str.substring(0, str.length() - 1);
+		}
+		if(str.startsWith("\n")) {
+			str = str.substring(1);
+		}
+		return str;
+	}
+	
+	public static String[] lines(String str) {
+		if(str == null) return null;
+		return CRLFtoLF(str).split("\n");
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/sp/WorkerListenThread.java

@@ -0,0 +1,96 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.src.NetHandler;
+
+public class WorkerListenThread {
+	/** Reference to the MinecraftServer object. */
+	private final MinecraftServer mcServer;
+	private final HashSet<NetHandler> connections = new HashSet<>();
+	private final HashMap<String, WorkerNetworkManager> channels = new HashMap<>();
+
+	/** Whether the network listener object is listening. */
+	public volatile boolean isListening = false;
+
+	public WorkerListenThread(MinecraftServer par1MinecraftServer) {
+		this.mcServer = par1MinecraftServer;
+		this.isListening = true;
+	}
+
+	/**
+	 * adds this connection to the list of currently connected players
+	 */
+	public void addPlayer(NetHandler par1NetServerHandler) {
+		System.out.println("[Server][ADDPLAYER][" + par1NetServerHandler.getClass().getSimpleName() + "]");
+		this.connections.add(par1NetServerHandler);
+	}
+
+	public void stopListening() {
+		this.isListening = false;
+		List<String> names = new ArrayList<>(channels.keySet());
+		for(int i = 0, l = names.size(); i < l; ++i) {
+			closeChannel(names.get(i));
+		}
+	}
+	
+	public boolean openChannel(String player) {
+		System.out.println("[Server][OPENCHANNEL][" + player + "]");
+		return channels.put(player, new WorkerNetworkManager(player, mcServer, this)) == null;
+	}
+	
+	public void recievePacket(String player, byte[] data) {
+		WorkerNetworkManager channel = channels.get(player);
+		if(channel == null) {
+			return;
+		}
+		channel.addToRecieveQueue(data);
+	}
+	
+	public boolean closeChannel(String player) {
+		System.out.println("[Server][CLOSECHANNEL][" + player + "]");
+		WorkerNetworkManager channel = channels.get(player);
+		if(channel == null) {
+			return false;
+		}
+		channels.remove(player);
+		channel.networkShutdown(null, null, null);
+		return true;
+	}
+	
+	private void deleteDeadConnections() {
+		Iterator<NetHandler> itr = this.connections.iterator();
+		while (itr.hasNext()) {
+			NetHandler handler = itr.next();
+			if (handler.shouldBeRemoved()) {
+				itr.remove();
+				//System.out.println("[Client][REMOVEDEAD]");
+			}
+		}
+	}
+
+	/**
+	 * Handles all incoming connections and packets
+	 */
+	public void handleNetworkListenThread() {
+		
+		deleteDeadConnections();
+		
+		List<NetHandler> conns = new ArrayList<>(this.connections);
+		for (NetHandler var2 : conns) {
+			var2.handlePackets();
+		}
+		
+		deleteDeadConnections();
+			
+	}
+
+	public MinecraftServer getServer() {
+		return this.mcServer;
+	}
+}

src/main/java/net/lax1dude/eaglercraft/sp/WorkerNetworkManager.java

@@ -0,0 +1,156 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.LinkedList;
+import net.lax1dude.eaglercraft.sp.ipc.IPCPacket0CPlayerChannel;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.src.INetworkManager;
+import net.minecraft.src.NetHandler;
+import net.minecraft.src.NetLoginHandler;
+import net.minecraft.src.NetServerHandler;
+import net.minecraft.src.Packet;
+
+public class WorkerNetworkManager implements INetworkManager {
+	
+	private NetHandler theNetHandler;
+	private MinecraftServer minecraftServer;
+	private String ipcChannel;
+	private boolean isAlive;
+	private WorkerListenThread listenThread;
+	
+	private LinkedList<byte[]> frags = new LinkedList<>();
+	
+	public WorkerNetworkManager(String ipcChannel, MinecraftServer srv, WorkerListenThread th) {
+		this.ipcChannel = ipcChannel;
+		this.theNetHandler = new NetLoginHandler(srv, this);
+		th.addPlayer(theNetHandler);
+		this.minecraftServer = srv;
+		this.isAlive = true;
+		this.listenThread = th;
+	}
+
+	@Override
+	public void setNetHandler(NetHandler var1) {
+		theNetHandler = var1;
+		listenThread.addPlayer(theNetHandler);
+	}
+
+	@Override
+	public void addToSendQueue(Packet var1) {
+		if(!isAlive) {
+			return;
+		}
+		try {
+			ByteArrayOutputStream bao = new ByteArrayOutputStream(var1.getPacketSize() + 1);
+			Packet.writePacket(var1, new DataOutputStream(bao));
+			IntegratedServer.sendPlayerPacket(ipcChannel, bao.toByteArray());
+		}catch(IOException e) {
+			System.err.println("Failed to serialize minecraft packet '" + var1.getPacketId() + "' for IPC channel 'NET|" + ipcChannel + "'");
+			e.printStackTrace();
+			return;
+		}
+	}
+	
+	public void addToRecieveQueue(byte[] fragment) {
+		//System.out.println("[Server][READ][QUEUE][" + ipcChannel + "]: " + fragment.length);
+		if(!isAlive) {
+			return;
+		}
+		frags.add(fragment);
+	}
+
+	@Override
+	public void wakeThreads() {
+		// no
+	}
+
+	@Override
+	public void processReadPackets() {
+		while(frags.size() > 0) {
+			byte[] pktBytes = frags.remove(0);
+			try {
+				ByteArrayInputStream bai = new ByteArrayInputStream(pktBytes);
+				int pktId = bai.read();
+				
+				if(pktId == -1) {
+					System.err.println("Recieved invalid '-1' packet");
+					continue;
+				}
+				
+				Packet pkt = Packet.getNewPacket(minecraftServer.getLogAgent(), pktId);
+				
+				if(pkt == null) {
+					System.err.println("Recieved invalid '" + pktId + "' packet");
+					continue;
+				}
+				
+				pkt.readPacketData(new DataInputStream(bai));
+				
+				//System.out.println("[Server][" + ipcChannel + "]: packet '" + pkt.getClass().getSimpleName() + "' recieved");
+				
+				try {
+					pkt.processPacket(theNetHandler);
+				}catch(Throwable t) {
+					System.err.println("Could not process minecraft packet 0x" + Integer.toHexString(pkt.getPacketId()) + " class '" + pkt.getClass().getSimpleName() + "' on channel 'NET|" + ipcChannel + "'");
+					t.printStackTrace();
+				}
+				
+			}catch(IOException ex) {
+				System.err.println("Could not deserialize a " + pktBytes.length + " byte long minecraft packet of type '" + (pktBytes.length <= 0 ? -1 : (int)(pktBytes[0] & 0xFF)) + "' on channel 'NET|" + ipcChannel + "'");
+			}
+		}
+		
+	}
+
+	@Override
+	public void serverShutdown() {
+		if(isAlive) {
+			listenThread.closeChannel(ipcChannel);
+			IntegratedServer.sendIPCPacket(new IPCPacket0CPlayerChannel(ipcChannel, false));
+		}
+		if(theNetHandler != null && (theNetHandler instanceof NetServerHandler)) {
+			((NetServerHandler)theNetHandler).kickPlayerFromServer(null);
+		}
+		isAlive = false;
+	}
+
+	@Override
+	public int packetSize() { // why is this a thing
+		return 0;
+	}
+
+	@Override
+	public void networkShutdown(String var1, Object... var2) {
+		if(isAlive) {
+			listenThread.closeChannel(ipcChannel);
+			IntegratedServer.sendIPCPacket(new IPCPacket0CPlayerChannel(ipcChannel, false));
+		}
+		if(theNetHandler != null && (theNetHandler instanceof NetServerHandler)) {
+			((NetServerHandler)theNetHandler).kickPlayerFromServer(null);
+		}
+		isAlive = false;
+	}
+
+	@Override
+	public void closeConnections() {
+
+	}
+
+	@Override
+	public String getServerURI() {
+		return "None? I dont fucking know what a URI is";
+	}
+
+	public boolean equals(Object o) {
+		return (o instanceof WorkerNetworkManager) && ((WorkerNetworkManager)o).ipcChannel.equals(ipcChannel);
+	}
+	
+	public int hashCode() {
+		return ipcChannel.hashCode();
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/WorldConverterEPK.java

@@ -0,0 +1,80 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.IOException;
+
+import net.minecraft.src.CompressedStreamTools;
+import net.minecraft.src.NBTTagCompound;
+
+public class WorldConverterEPK {
+
+	public static void importWorld(byte[] archiveContents, String newName) throws IOException {
+		String folder = VFSSaveHandler.worldNameToFolderName(newName);
+		VFile dir = new VFile("worlds", folder);
+		EPKDecompiler dc = new EPKDecompiler(archiveContents);
+		EPKDecompiler.FileEntry f = null;
+		int lastProgUpdate = 0;
+		int prog = 0;
+		boolean hasReadType = dc.isOld();
+		while((f = dc.readFile()) != null) {
+			byte[] b = f.data;
+			if(!hasReadType) {
+				if(f.type.equals("HEAD") && f.name.equals("file-type") && EPKDecompiler.readASCII(f.data).equals("epk/world152")) {
+					hasReadType = true;
+					continue;
+				}else {
+					throw new IOException("file does not contain a singleplayer 1.5.2 world!");
+				}
+			}
+			if(f.type.equals("FILE")) {
+				if(f.name.equals("level.dat")) {
+					NBTTagCompound worldDatNBT = CompressedStreamTools.decompress(b);
+					worldDatNBT.getCompoundTag("Data").setString("LevelName", newName);
+					worldDatNBT.getCompoundTag("Data").setLong("LastPlayed", System.currentTimeMillis());
+					b = CompressedStreamTools.compress(worldDatNBT);
+				}
+				VFile ff = new VFile(dir, f.name);
+				ff.setAllBytes(b);
+				prog += b.length;
+				if(prog - lastProgUpdate > 10000) {
+					lastProgUpdate = prog;
+					IntegratedServer.updateStatusString("selectWorld.progress.importing.0", prog);
+				}
+			}
+		}
+		String[] worldsTxt = SYS.VFS.getFile("worlds.txt").getAllLines();
+		if(worldsTxt == null || worldsTxt.length <= 0) {
+			worldsTxt = new String[] { folder };
+		}else {
+			String[] tmp = worldsTxt;
+			worldsTxt = new String[worldsTxt.length + 1];
+			System.arraycopy(tmp, 0, worldsTxt, 0, tmp.length);
+			worldsTxt[worldsTxt.length - 1] = folder;
+		}
+		SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", worldsTxt));
+	}
+
+	public static byte[] exportWorld(String worldName) {
+		String realWorldName = worldName;
+		String worldOwner = "UNKNOWN";
+		int j = realWorldName.lastIndexOf(new String(new char[] { (char)253, (char)233, (char)233 }));
+		if(j != -1) {
+			worldOwner = realWorldName.substring(j + 3);
+			realWorldName = realWorldName.substring(0, j);
+		}
+		final int[] bytesWritten = new int[1];
+		final int[] lastUpdate = new int[1];
+		String pfx = "worlds/" + realWorldName + "/";
+		EPK2Compiler c = new EPK2Compiler(realWorldName, worldOwner, "epk/world152");
+		SYS.VFS.iterateFiles(pfx, false, (i) -> {
+			byte[] b = i.getAllBytes();
+			c.append(i.path.substring(pfx.length()), b);
+			bytesWritten[0] += b.length;
+			if (bytesWritten[0] - lastUpdate[0] > 10000) {
+				lastUpdate[0] = bytesWritten[0];
+				IntegratedServer.updateStatusString("selectWorld.progress.exporting.1", bytesWritten[0]);
+			}
+		});
+		return c.complete();
+	}
+
+}

src/main/java/net/lax1dude/eaglercraft/sp/WorldConverterMCA.java

@@ -0,0 +1,255 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+import java.util.zip.ZipOutputStream;
+
+import net.minecraft.src.CompressedStreamTools;
+import net.minecraft.src.NBTTagCompound;
+import net.minecraft.src.RegionFile;
+
+public class WorldConverterMCA {
+
+	public static void importWorld(byte[] archiveContents, String newName) throws IOException {
+		String folderName = newName.replaceAll("[\\./\"]", "_");
+		VFile worldDir = new VFile("worlds", folderName);
+		while((new VFile(worldDir, "level.dat")).exists() || (new VFile(worldDir, "level.dat_old")).exists()) {
+			folderName += "_";
+			worldDir = new VFile("worlds", folderName);
+		}
+		List<char[]> fileNames = new ArrayList<>();
+		try(ZipInputStream zis = new ZipInputStream(new ByteArrayInputStream(archiveContents))) {
+			ZipEntry folderNameFile = null;
+			while((folderNameFile = zis.getNextEntry()) != null) {
+				if (folderNameFile.getName().contains("__MACOSX/")) continue;
+				if (folderNameFile.isDirectory()) continue;
+				String lowerName = folderNameFile.getName().toLowerCase();
+				if (!(lowerName.endsWith(".dat") || lowerName.endsWith(".dat_old") || lowerName.endsWith(".mca") || lowerName.endsWith(".mcr"))) continue;
+				fileNames.add(folderNameFile.getName().toCharArray());
+			}
+		}
+		final int[] i = new int[] { 0 };
+		while(fileNames.get(0).length > i[0] && fileNames.stream().allMatch(w -> w[i[0]] == fileNames.get(0)[i[0]])) i[0]++;
+		int folderPrefixOffset = i[0];
+		try(ZipInputStream zis = new ZipInputStream(new ByteArrayInputStream(archiveContents))) {
+			ZipEntry f = null;
+			int lastProgUpdate = 0;
+			int prog = 0;
+			while ((f = zis.getNextEntry()) != null) {
+				if (f.getName().contains("__MACOSX/")) continue;
+				if (f.isDirectory()) continue;
+				String lowerName = f.getName().toLowerCase();
+				if (!(lowerName.endsWith(".dat") || lowerName.endsWith(".dat_old") || lowerName.endsWith(".mca") || lowerName.endsWith(".mcr") || lowerName.endsWith(".bmp"))) continue;
+				byte[] b;
+				int sz = (int)f.getSize();
+				if(sz >= 0) {
+					b = new byte[sz];
+					int j = 0, k;
+					while(j < b.length && (k = zis.read(b, j, b.length - j)) != -1) {
+						j += k;
+					}
+				}else {
+					b = inputStreamToBytesNoClose(zis);
+				}
+				String fileName = f.getName().substring(folderPrefixOffset);
+				if (fileName.equals("level.dat") || fileName.equals("level.dat_old")) {
+					NBTTagCompound worldDatNBT = CompressedStreamTools.readCompressed(new ByteArrayInputStream(b));
+					worldDatNBT.getCompoundTag("Data").setString("LevelName", newName);
+					worldDatNBT.getCompoundTag("Data").setLong("LastPlayed", System.currentTimeMillis());
+					ByteArrayOutputStream bo = new ByteArrayOutputStream();
+					CompressedStreamTools.writeCompressed(worldDatNBT, bo);
+					b = bo.toByteArray();
+					VFile ff = new VFile(worldDir, fileName);
+					ff.setAllBytes(b);
+					prog += b.length;
+				} else if ((fileName.endsWith(".mcr") || fileName.endsWith(".mca")) && (fileName.startsWith("region/") || fileName.startsWith("DIM1/region/") || fileName.startsWith("DIM-1/region/"))) {
+					VFile chunkFolder = new VFile(worldDir, fileName.startsWith("DIM1") ? "level1" : (fileName.startsWith("DIM-1") ? "level-1" : "level0"));
+					RegionFile mca = new RegionFile(new RandomAccessMemoryFile(b, b.length));
+					for(int j = 0; j < 32; ++j) {
+						for(int k = 0; k < 32; ++k) {
+							if(mca.isChunkSaved(j, k)) {
+								NBTTagCompound chunkNBT;
+								NBTTagCompound chunkLevel;
+								try {
+									chunkNBT = CompressedStreamTools.read(mca.getChunkDataInputStream(j, k));
+									if(!chunkNBT.hasKey("Level")) {
+										throw new IOException("Chunk is missing level data!");
+									}
+									chunkLevel = chunkNBT.getCompoundTag("Level");
+								}catch(Throwable t) {
+									System.err.println("Could not read chunk: " + j + ", " + k);
+									t.printStackTrace();
+									continue;
+								}
+								int chunkX = chunkLevel.getInteger("xPos");
+								int chunkZ = chunkLevel.getInteger("zPos");
+								VFile chunkOut = new VFile(chunkFolder, VFSChunkLoader.getChunkPath(chunkX, chunkZ) + ".dat");
+								if(chunkOut.exists()) {
+									System.err.println("Chunk already exists: " + chunkOut.getPath());
+									continue;
+								}
+								ByteArrayOutputStream bao = new ByteArrayOutputStream();
+								CompressedStreamTools.writeCompressed(chunkNBT, bao);
+								b = bao.toByteArray();
+								chunkOut.setAllBytes(b);
+								prog += b.length;
+								if (prog - lastProgUpdate > 25000) {
+									lastProgUpdate = prog;
+									IntegratedServer.updateStatusString("selectWorld.progress.importing.1", prog);
+								}
+							}
+						}
+					}
+				} else if (fileName.startsWith("data/") || fileName.startsWith("players/")) {
+					VFile ff = new VFile(worldDir, fileName);
+					ff.setAllBytes(b);
+					prog += b.length;
+				}
+			}
+		}
+		String[] worldsTxt = SYS.VFS.getFile("worlds.txt").getAllLines();
+		if(worldsTxt == null || worldsTxt.length <= 0 || (worldsTxt.length == 1 && worldsTxt[0].trim().length() <= 0)) {
+			worldsTxt = new String[] { folderName };
+		}else {
+			String[] tmp = worldsTxt;
+			worldsTxt = new String[worldsTxt.length + 1];
+			System.arraycopy(tmp, 0, worldsTxt, 0, tmp.length);
+			worldsTxt[worldsTxt.length - 1] = folderName;
+		}
+		SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", worldsTxt));
+	}
+
+	public static byte[] exportWorld(String folderName) throws IOException {
+		ByteArrayOutputStream bao = new ByteArrayOutputStream();
+		VFile worldFolder;
+		try(ZipOutputStream zos = new ZipOutputStream(bao)) {
+			zos.setComment("contains backup of world '" + folderName + "'");
+			worldFolder =  new VFile("worlds", folderName);
+			VFile vf = new VFile(worldFolder, "level.dat");
+			byte[] b;
+			int lastProgUpdate = 0;
+			int prog = 0;
+			boolean safe = false;
+			if(vf.exists()) {
+				zos.putNextEntry(new ZipEntry(folderName + "/level.dat"));
+				b = vf.getAllBytes();
+				zos.write(b);
+				prog += b.length;
+				safe = true;
+			}
+			vf = new VFile(worldFolder, "level.dat_old");
+			if(vf.exists()) {
+				zos.putNextEntry(new ZipEntry(folderName + "/level.dat_old"));
+				b = vf.getAllBytes();
+				zos.write(b);
+				prog += b.length;
+				safe = true;
+			}
+			if (prog - lastProgUpdate > 25000) {
+				lastProgUpdate = prog;
+				IntegratedServer.updateStatusString("selectWorld.progress.exporting.2", prog);
+			}
+			String[] srcFolderNames = new String[] { "level0", "level-1", "level1" };
+			String[] dstFolderNames = new String[] { "/region/", "/DIM-1/region/", "/DIM1/region/" };
+			List<VFile> fileList;
+			for(int i = 0; i < 3; ++i) {
+				vf = new VFile(worldFolder, srcFolderNames[i]);
+				fileList = SYS.VFS.listVFiles(vf.getPath());
+				String regionFolder = folderName + dstFolderNames[i];
+				Map<String,RegionFile> regionFiles = new HashMap<>();
+				for(int k = 0, l = fileList.size(); k < l; ++k) {
+					VFile chunkFile = fileList.get(k);
+					NBTTagCompound chunkNBT;
+					NBTTagCompound chunkLevel;
+					try {
+						b = chunkFile.getAllBytes();
+						chunkNBT = CompressedStreamTools.readCompressed(new ByteArrayInputStream(b));
+						if(!chunkNBT.hasKey("Level")) {
+							throw new IOException("Chunk is missing level data!");
+						}
+						chunkLevel = chunkNBT.getCompoundTag("Level");
+					}catch(IOException t) {
+						System.err.println("Could not read chunk: " + chunkFile.getPath());
+						t.printStackTrace();
+						continue;
+					}
+					int chunkX = chunkLevel.getInteger("xPos");
+					int chunkZ = chunkLevel.getInteger("zPos");
+					String regionFileName = "r." + (chunkX >> 5) + "." + (chunkZ >> 5) + ".mca";
+					RegionFile rf = regionFiles.get(regionFileName);
+					if(rf == null) {
+						rf = new RegionFile(new RandomAccessMemoryFile(new byte[65536], 0));
+						regionFiles.put(regionFileName, rf);
+					}
+					try(DataOutputStream dos = rf.getChunkDataOutputStream(chunkX & 31, chunkZ & 31)) {
+						CompressedStreamTools.write(chunkNBT, dos);
+					}catch(IOException t) {
+						System.err.println("Could not write chunk to " + regionFileName + ": " + chunkFile.getPath());
+						t.printStackTrace();
+						continue;
+					}
+					prog += b.length;
+					if (prog - lastProgUpdate > 25000) {
+						lastProgUpdate = prog;
+						IntegratedServer.updateStatusString("selectWorld.progress.exporting.2", prog);
+					}
+				}
+				if(regionFiles.isEmpty()) {
+					System.err.println("No region files were generated");
+					continue;
+				}
+				for(Entry<String,RegionFile> etr : regionFiles.entrySet()) {
+					String regionPath = regionFolder + etr.getKey();
+					zos.putNextEntry(new ZipEntry(regionPath));
+					zos.write(etr.getValue().getFile().getByteArray());
+				}
+			}
+			fileList = SYS.VFS.listVFiles((new VFile(worldFolder, "data")).getPath());
+			for(int k = 0, l = fileList.size(); k < l; ++k) {
+				VFile dataFile = fileList.get(k);
+				zos.putNextEntry(new ZipEntry(folderName + "/data/" + dataFile.getName()));
+				b = dataFile.getAllBytes();
+				zos.write(b);
+				prog += b.length;
+				if (prog - lastProgUpdate > 25000) {
+					lastProgUpdate = prog;
+					IntegratedServer.updateStatusString("selectWorld.progress.exporting.2", prog);
+				}
+			}
+			fileList = SYS.VFS.listVFiles((new VFile(worldFolder, "players")).getPath());
+			for(int k = 0, l = fileList.size(); k < l; ++k) {
+				VFile dataFile = fileList.get(k);
+				zos.putNextEntry(new ZipEntry(folderName + "/players/" + dataFile.getName()));
+				b = dataFile.getAllBytes();
+				zos.write(b);
+				prog += b.length;
+				if (prog - lastProgUpdate > 25000) {
+					lastProgUpdate = prog;
+					IntegratedServer.updateStatusString("selectWorld.progress.exporting.2", prog);
+				}
+			}
+		}
+		return bao.toByteArray();
+	}
+
+	private static byte[] inputStreamToBytesNoClose(InputStream is) throws IOException {
+		ByteArrayOutputStream os = new ByteArrayOutputStream(1024);
+		byte[] buf = new byte[1024];
+		int i;
+		while ((i = is.read(buf)) != -1) {
+			os.write(buf, 0, i);
+		}
+		return os.toByteArray();
+	}
+
+}

src/main/java/net/minecraft/src/AchievementMap.java

@@ -1,39 +1,34 @@
 package net.minecraft.src;
 
-import net.lax1dude.eaglercraft.EaglerMisc;
-
-import java.io.BufferedReader;
-import java.io.InputStreamReader;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
-public class AchievementMap
-{
+public class AchievementMap {
     /** Holds the singleton instance of AchievementMap. */
-    public static AchievementMap instance = new AchievementMap();
+    public static AchievementMap instance = null;
+
+    public static void init(List<String> guid) {
+        instance = new AchievementMap(guid);
+        StatList.initStats();
+        StatList.initBreakableStats();
+    }
 
     /** Maps a achievement id with it's unique GUID. */
     private Map guidMap = new HashMap();
 
-    private AchievementMap()
-    {
-        try {
-            String[] strs = EaglerMisc.bytesToLines(Minecraft.getMinecraft().texturePackList.getSelectedTexturePack().getResourceAsBytes("/achievement/map.txt"));
-            for(String str : strs) {
-                String[] var3 = str.split(",");
-                int var4 = Integer.parseInt(var3[0]);
-                this.guidMap.put(Integer.valueOf(var4), var3[1]);
-            }
-        } catch (Exception var5) {
-            var5.printStackTrace();
+    private AchievementMap(List<String> guid) {
+        for (String var2 : guid) {
+            String[] var3 = var2.split(",");
+            int var4 = Integer.parseInt(var3[0]);
+            this.guidMap.put(Integer.valueOf(var4), var3[1]);
         }
     }
 
     /**
      * Returns the unique GUID of a achievement id.
      */
-    public static String getGuid(int par0)
-    {
-        return (String)instance.guidMap.get(Integer.valueOf(par0));
+    public static String getGuid(int par0) {
+        return (String) instance.guidMap.get(Integer.valueOf(par0));
     }
-}
+}

src/main/java/net/minecraft/src/BiomeCache.java

@@ -1,5 +1,6 @@
 package net.minecraft.src;
 
+import net.lax1dude.eaglercraft.EaglerAdapter;
 import net.minecraft.server.MinecraftServer;
 
 import java.util.ArrayList;
@@ -43,7 +44,7 @@ public class BiomeCache
             this.cache.add(var5);
         }
 
-        var5.lastAccessTime = MinecraftServer.getSystemTimeMillis();
+        var5.lastAccessTime = EaglerAdapter.steadyTimeMillis();
         return var5;
     }
 
@@ -60,7 +61,7 @@ public class BiomeCache
      */
     public void cleanupCache()
     {
-        long var1 = MinecraftServer.getSystemTimeMillis();
+        long var1 = EaglerAdapter.steadyTimeMillis();
         long var3 = var1 - this.lastCleanupTime;
 
         if (var3 > 7500L || var3 < 0L)

src/main/java/net/minecraft/src/Chunk.java

@@ -385,6 +385,8 @@ public class Chunk
         }
     }
 
+    public static int totalBlockLightUpdates = 0;
+
     /**
      * Initiates the recalculation of both the block-light and sky-light for a given block inside a chunk.
      */
@@ -495,6 +497,7 @@ public class Chunk
                 this.updateSkylightNeighborHeight(var6, var7, var12, var13);
             }
 
+            ++totalBlockLightUpdates;
             this.isModified = true;
         }
     }

src/main/java/net/minecraft/src/ChunkProviderServer.java

@@ -338,4 +338,26 @@ public class ChunkProviderServer implements IChunkProvider
     }
 
     public void recreateStructures(int par1, int par2) {}
+
+    private int _r = 0;
+    private int _w = 0;
+    private int _g = 0;
+
+    public int statR() {
+        int r = _r;
+        _r = 0;
+        return r;
+    }
+
+    public int statW() {
+        int w = _w;
+        _w = 0;
+        return w;
+    }
+
+    public int statG() {
+        int g = _g;
+        _g = 0;
+        return g;
+    }
 }

src/main/java/net/minecraft/src/CommandDebug.java

@@ -1,5 +1,6 @@
 package net.minecraft.src;
 
+import net.lax1dude.eaglercraft.EaglerAdapter;
 import net.minecraft.server.MinecraftServer;
 
 import java.io.File;
@@ -41,15 +42,15 @@ public class CommandDebug extends CommandBase
             if (par2ArrayOfStr[0].equals("start"))
             {
                 notifyAdmins(par1ICommandSender, "commands.debug.start", new Object[0]);
-                MinecraftServer.getServer().enableProfiling();
-                this.startTime = MinecraftServer.getSystemTimeMillis();
+                //MinecraftServer.getServer().enableProfiling();
+                this.startTime = EaglerAdapter.steadyTimeMillis();
                 this.startTicks = MinecraftServer.getServer().getTickCounter();
                 return;
             }
 
             if (par2ArrayOfStr[0].equals("stop"))
             {
-                long var3 = MinecraftServer.getSystemTimeMillis();
+                long var3 = EaglerAdapter.steadyTimeMillis();
                 int var5 = MinecraftServer.getServer().getTickCounter();
                 long var6 = var3 - this.startTime;
                 int var8 = var5 - this.startTicks;

src/main/java/net/minecraft/src/CommandDefaultGameMode.java

@@ -31,17 +31,6 @@ public class CommandDefaultGameMode extends CommandGameMode
 
     protected void setGameType(EnumGameType par1EnumGameType)
     {
-        MinecraftServer var2 = MinecraftServer.getServer();
-        var2.setGameType(par1EnumGameType);
-        EntityPlayerMP var4;
-
-        if (var2.getForceGamemode())
-        {
-            for (Iterator var3 = MinecraftServer.getServer().getConfigurationManager().playerEntityList.iterator(); var3.hasNext(); var4.fallDistance = 0.0F)
-            {
-                var4 = (EntityPlayerMP)var3.next();
-                var4.setGameType(par1EnumGameType);
-            }
-        }
+        MinecraftServer.getServer().setGameType(par1EnumGameType);
     }
 }

src/main/java/net/minecraft/src/CommandSetPlayerTimeout.java

@@ -27,7 +27,7 @@ public class CommandSetPlayerTimeout extends CommandBase
         if (par2ArrayOfStr.length == 1)
         {
             int var3 = parseIntWithMin(par1ICommandSender, par2ArrayOfStr[0], 0);
-            MinecraftServer.getServer().func_143006_e(var3);
+            //MinecraftServer.getServer().func_143006_e(var3);
             notifyAdmins(par1ICommandSender, "commands.setidletimeout.success", new Object[] {Integer.valueOf(var3)});
         }
         else

src/main/java/net/minecraft/src/CompressedStreamTools.java

@@ -13,8 +13,10 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.util.zip.GZIPInputStream;
-import java.util.zip.GZIPOutputStream;
+
+import com.jcraft.jzlib.Deflater;
+import com.jcraft.jzlib.GZIPInputStream;
+import com.jcraft.jzlib.GZIPOutputStream;
 
 public class CompressedStreamTools
 {
@@ -182,16 +184,12 @@ public class CompressedStreamTools
     /**
      * Reads from a CompressedStream.
      */
-    public static NBTTagCompound read(DataInput par0DataInput) throws IOException
-    {
+    public static NBTTagCompound read(DataInput par0DataInput) throws IOException {
         NBTBase var1 = NBTBase.readNamedTag(par0DataInput);
 
-        if (var1 instanceof NBTTagCompound)
-        {
-            return (NBTTagCompound)var1;
-        }
-        else
-        {
+        if (var1 instanceof NBTTagCompound) {
+            return (NBTTagCompound) var1;
+        } else {
             throw new IOException("Root tag must be a named compound tag");
         }
     }

src/main/java/net/minecraft/src/ConvertingProgressUpdate.java

@@ -1,5 +1,6 @@
 package net.minecraft.src;
 
+import net.lax1dude.eaglercraft.EaglerAdapter;
 import net.minecraft.server.MinecraftServer;
 
 public class ConvertingProgressUpdate implements IProgressUpdate
@@ -12,7 +13,7 @@ public class ConvertingProgressUpdate implements IProgressUpdate
     public ConvertingProgressUpdate(MinecraftServer par1MinecraftServer)
     {
         this.mcServer = par1MinecraftServer;
-        this.field_96245_b = MinecraftServer.getSystemTimeMillis();
+        this.field_96245_b = EaglerAdapter.steadyTimeMillis();
     }
 
     /**
@@ -25,9 +26,9 @@ public class ConvertingProgressUpdate implements IProgressUpdate
      */
     public void setLoadingProgress(int par1)
     {
-        if (MinecraftServer.getSystemTimeMillis() - this.field_96245_b >= 1000L)
+        if (EaglerAdapter.steadyTimeMillis() - this.field_96245_b >= 1000L)
         {
-            this.field_96245_b = MinecraftServer.getSystemTimeMillis();
+            this.field_96245_b = EaglerAdapter.steadyTimeMillis();
             this.mcServer.getLogAgent().logInfo("Converting... " + par1 + "%");
         }
     }

src/main/java/net/minecraft/src/EntityPlayerMP.java

@@ -9,6 +9,8 @@ import java.util.Collection;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
+
+import net.lax1dude.eaglercraft.EaglerAdapter;
 import net.minecraft.server.MinecraftServer;
 
 public class EntityPlayerMP extends EntityPlayer implements ICrafting
@@ -55,7 +57,7 @@ public class EntityPlayerMP extends EntityPlayer implements ICrafting
     private int initialInvulnerability = 60;
 
     /** must be between 3>x>15 (strictly between) */
-    private int renderDistance;
+    int renderDistance;
     private int chatVisibility;
     private boolean chatColours = true;
     private long field_143005_bX = 0L;
@@ -117,7 +119,7 @@ public class EntityPlayerMP extends EntityPlayer implements ICrafting
 
         if (par1NBTTagCompound.hasKey("playerGameType"))
         {
-            if (MinecraftServer.getServer().getForceGamemode())
+            if (true) // FIX THIS SHIT
             {
                 this.theItemInWorldManager.setGameType(MinecraftServer.getServer().getGameType());
             }
@@ -234,10 +236,10 @@ public class EntityPlayerMP extends EntityPlayer implements ICrafting
             }
         }
 
-        if (this.field_143005_bX > 0L && this.mcServer.func_143007_ar() > 0 && MinecraftServer.getSystemTimeMillis() - this.field_143005_bX > (long)(this.mcServer.func_143007_ar() * 1000 * 60))
+        /*if (this.field_143005_bX > 0L && this.mcServer.func_143007_ar() > 0 && EaglerAdapter.steadyTimeMillis() - this.field_143005_bX > (long)(this.mcServer.func_143007_ar() * 1000 * 60))
         {
             this.playerNetServerHandler.kickPlayerFromServer("You have been idle for too long!");
-        }
+        }*/
     }
 
     public void onUpdateEntity()
@@ -905,7 +907,10 @@ public class EntityPlayerMP extends EntityPlayer implements ICrafting
      */
     public boolean canCommandSenderUseCommand(int par1, String par2Str)
     {
-        return "seed".equals(par2Str) && !this.mcServer.isDedicatedServer() ? true : (!"tell".equals(par2Str) && !"help".equals(par2Str) && !"me".equals(par2Str) ? (this.mcServer.getConfigurationManager().isPlayerOpped(this.username) ? this.mcServer.func_110455_j() >= par1 : false) : true);
+        return "seed".equals(par2Str) && !this.mcServer.isDedicatedServer() ? true
+                : (!"tell".equals(par2Str) && !"help".equals(par2Str) && !"me".equals(par2Str)
+                ? this.mcServer.getConfigurationManager().isPlayerOpped(this.username)
+                : true);
     }
 
     /**
@@ -913,7 +918,7 @@ public class EntityPlayerMP extends EntityPlayer implements ICrafting
      */
     public String getPlayerIP()
     {
-        return null;
+        return "Cannot get IP over websocket";
     }
 
     public void updateClientInfo(Packet204ClientInfo par1Packet204ClientInfo)
@@ -961,6 +966,6 @@ public class EntityPlayerMP extends EntityPlayer implements ICrafting
 
     public void func_143004_u()
     {
-        this.field_143005_bX = MinecraftServer.getSystemTimeMillis();
+        this.field_143005_bX = EaglerAdapter.steadyTimeMillis();
     }
 }

src/main/java/net/minecraft/src/GuiMainMenu.java

@@ -142,7 +142,7 @@ public class GuiMainMenu extends GuiScreen {
         StringTranslate var2 = StringTranslate.getInstance();
         int var4 = this.height / 4 + 48;
 
-        if(false) { // EaglerAdapter.isIntegratedServerAvailable()
+        if(EaglerAdapter.isIntegratedServerAvailable()) { // EaglerAdapter.isIntegratedServerAvailable()
             this.buttonList.add(new GuiButton(1, this.width / 2 - 100, var4, var2.translateKey("menu.singleplayer")));
             this.buttonList.add(new GuiButton(2, this.width / 2 - 100, var4 + 24 * 1, var2.translateKey("menu.multiplayer")));
             this.buttonList.add(new GuiButton(3, this.width / 2 - 100, var4 + 24 * 2, var2.translateKey("menu.forkme")));

src/main/java/net/minecraft/src/ICommandSender.java

@@ -19,5 +19,5 @@ public interface ICommandSender
      */
     ChunkCoordinates getPlayerCoordinates();
 
-    World getEntityWorld();
+    //World getEntityWorld();
 }

src/main/java/net/minecraft/src/NetHandler.java

@@ -12,12 +12,15 @@ public abstract class NetHandler
      */
     public void handleMapChunk(Packet51MapChunk par1Packet51MapChunk) {}
 
-    /**
-     * Default handler called for packets that don't have their own handlers in NetClientHandler; currentlly does
-     * nothing.
-     */
+    public boolean shouldBeRemoved() {
+        return true;
+    }
+
     public void unexpectedPacket(Packet par1Packet) {}
 
+    public void handlePackets() {
+    }
+
     public void handleErrorMessage(String par1Str, Object[] par2ArrayOfObj) {}
 
     public void handleKickDisconnect(Packet255KickDisconnect par1Packet255KickDisconnect)

src/main/java/net/minecraft/src/NetLoginHandler.java

@@ -0,0 +1,242 @@
+package net.minecraft.src;
+
+import java.io.Serializable;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+
+import net.lax1dude.eaglercraft.sp.EaglercraftRandom;
+import net.lax1dude.eaglercraft.sp.WorkerNetworkManager;
+import net.minecraft.server.MinecraftServer;
+
+public class NetLoginHandler extends NetHandler {
+	/** The Random object used to generate serverId hex strings. */
+	private static EaglercraftRandom rand = new EaglercraftRandom();
+
+	/** Reference to the MinecraftServer object. */
+	private final MinecraftServer mcServer;
+	public final WorkerNetworkManager myTCPConnection;
+
+	/**
+	 * Returns if the login handler is finished and can be removed. It is set to
+	 * true on either error or successful login.
+	 */
+	public boolean finishedProcessing = false;
+
+	/** While waiting to login, if this field ++'s to 600 it will kick you. */
+	private int loginTimer = 0;
+	private String clientUsername = null;
+	private volatile boolean field_72544_i = false;
+
+	private boolean field_92079_k = false;
+
+	private int hash = 0;
+	private static int hashBase = 69696969;
+	
+	private int viewDistance = 2;
+
+	public NetLoginHandler(MinecraftServer par1MinecraftServer, WorkerNetworkManager par2Socket) {
+		this.mcServer = par1MinecraftServer;
+		this.myTCPConnection = par2Socket;
+		hash = ++hashBase;
+	}
+	
+	public boolean shouldBeRemoved() {
+		return this.finishedProcessing;
+	}
+
+	/**
+	 * Logs the user in if a login packet is found, otherwise keeps processing
+	 * network packets unless the timeout has occurred.
+	 */
+	public void handlePackets() {
+		System.out.println("[Server][LOGIN][HANDLE][" + clientUsername + "]");
+		if (this.field_72544_i) {
+			this.initializePlayerConnection();
+			return;
+		}
+
+		if (this.loginTimer++ == 600) {
+			this.kickUser("Took too long to log in");
+		} else {
+			this.myTCPConnection.processReadPackets();
+		}
+	}
+	
+	public boolean equals(Object o) {
+		return (o instanceof NetLoginHandler) && ((NetLoginHandler)o).hash == hash;
+	}
+	
+	public int hashCode() {
+		return hash;
+	}
+
+	/**
+	 * Disconnects the user with the given reason.
+	 */
+	public void kickUser(String par1Str) {
+		try {
+			this.mcServer.getLogAgent().logInfo("Disconnecting " + this.getUsernameAndAddress() + ": " + par1Str);
+			this.myTCPConnection.addToSendQueue(new Packet255KickDisconnect(par1Str));
+			this.myTCPConnection.serverShutdown();
+			this.finishedProcessing = true;
+		} catch (Exception var3) {
+			var3.printStackTrace();
+		}
+	}
+
+	public void handleClientProtocol(Packet2ClientProtocol par1Packet2ClientProtocol) {
+		this.clientUsername = par1Packet2ClientProtocol.getUsername();
+		int var2 = 64 << 3 - par1Packet2ClientProtocol.getViewDistance();
+		if(var2 > 400) {
+			var2 = 400;
+		}
+		var2 = (var2 >> 5) + 2;
+		this.viewDistance = var2;
+		System.out.println("[Server][HANDSHAKE][" + this.clientUsername + "]");
+
+		if (!this.clientUsername.equals(StringUtils.stripControlCodes(this.clientUsername))) {
+			this.kickUser("Invalid username!");
+		} else {
+			if (par1Packet2ClientProtocol.getProtocolVersion() != 61) {
+				if (par1Packet2ClientProtocol.getProtocolVersion() > 61) {
+					this.kickUser("Outdated server!");
+				} else {
+					this.kickUser("Outdated client!");
+				}
+			}else {
+				this.initializePlayerConnection();
+			}
+		}
+	}
+
+	public void handleClientCommand(Packet205ClientCommand par1Packet205ClientCommand) {
+		if (par1Packet205ClientCommand.forceRespawn == 0) {
+			if (this.field_92079_k) {
+				this.kickUser("Duplicate login");
+				return;
+			}
+
+			this.field_92079_k = true;
+			this.field_72544_i = true;
+		}
+	}
+
+	public void handleLogin(Packet1Login par1Packet1Login) {
+	}
+
+	/**
+	 * on success the specified username is connected to the minecraftInstance,
+	 * otherwise they are packet255'd
+	 */
+	public void initializePlayerConnection() {
+		String var1 = this.mcServer.getConfigurationManager().allowUserToConnect(this.clientUsername);
+
+		if (var1 != null) {
+			this.kickUser(var1);
+		} else {
+			EntityPlayerMP var2 = this.mcServer.getConfigurationManager().createPlayerForUser(this.clientUsername);
+			if (var2 != null) {
+				if (this.mcServer.getServerOwner().equals(this.clientUsername)) {
+					var2.renderDistance = this.viewDistance;
+				} else {
+					EntityPlayerMP fard = this.mcServer.getConfigurationManager().getPlayerForUsername(this.mcServer.getServerOwner());
+					int maxRenderDistance = fard == null ? 10 : (fard.renderDistance > 10 ? 10 : fard.renderDistance);
+					var2.renderDistance = this.viewDistance > maxRenderDistance ? maxRenderDistance : this.viewDistance;
+				}
+				this.mcServer.getConfigurationManager().initializeConnectionToPlayer(this.myTCPConnection, var2);
+			}else {
+				this.kickUser("Could not construct EntityPlayerMP for '" + var1 + "'");
+			}
+		}
+
+		this.finishedProcessing = true;
+	}
+
+	public void handleErrorMessage(String par1Str, Object[] par2ArrayOfObj) {
+		this.mcServer.getLogAgent().logInfo(this.getUsernameAndAddress() + " lost connection");
+		this.finishedProcessing = true;
+	}
+
+	/**
+	 * Handle a server ping packet.
+	 */
+	public void handleServerPing(Packet254ServerPing par1Packet254ServerPing) {
+		try {
+			ServerConfigurationManager var2 = this.mcServer.getConfigurationManager();
+			String var3 = null;
+
+			if (par1Packet254ServerPing.readSuccessfully == 1) {
+				List var4 = Arrays.asList(new Serializable[] { Integer.valueOf(1), Integer.valueOf(61),
+						this.mcServer.getMinecraftVersion(), this.mcServer.getMOTD(),
+						Integer.valueOf(var2.getCurrentPlayerCount()), Integer.valueOf(var2.getMaxPlayers()) });
+				Object var6;
+
+				for (Iterator var5 = var4.iterator(); var5
+						.hasNext(); var3 = var3 + var6.toString().replaceAll("\u0000", "")) {
+					var6 = var5.next();
+
+					if (var3 == null) {
+						var3 = "\u00a7";
+					} else {
+						var3 = var3 + "\u0000";
+					}
+				}
+			} else {
+				var3 = this.mcServer.getMOTD() + "\u00a7" + var2.getCurrentPlayerCount() + "\u00a7"
+						+ var2.getMaxPlayers();
+			}
+			
+			this.myTCPConnection.addToSendQueue(new Packet255KickDisconnect(var3));
+			this.myTCPConnection.serverShutdown();
+
+			this.finishedProcessing = true;
+		} catch (Exception var7) {
+			var7.printStackTrace();
+		}
+	}
+
+	/**
+	 * Default handler called for packets that don't have their own handlers in
+	 * NetServerHandler; kicks player from the server.
+	 */
+	public void unexpectedPacket(Packet par1Packet) {
+		this.kickUser("Protocol error");
+	}
+
+	public String getUsernameAndAddress() {
+		return this.clientUsername + "[EAG]";
+	}
+
+	/**
+	 * determine if it is a server handler
+	 */
+	public boolean isServerHandler() {
+		return true;
+	}
+
+	/**
+	 * Returns the server Id randomly generated by this login handler.
+	 */
+	static String getServerId(NetLoginHandler par0NetLoginHandler) {
+		return "you eagler";
+	}
+
+	/**
+	 * Returns the reference to Minecraft Server.
+	 */
+	static MinecraftServer getLoginMinecraftServer(NetLoginHandler par0NetLoginHandler) {
+		return par0NetLoginHandler.mcServer;
+	}
+
+	/**
+	 * Returns the connecting client username.
+	 */
+	static String getClientUsername(NetLoginHandler par0NetLoginHandler) {
+		return par0NetLoginHandler.clientUsername;
+	}
+
+	static boolean func_72531_a(NetLoginHandler par0NetLoginHandler, boolean par1) {
+		return par0NetLoginHandler.field_72544_i = par1;
+	}
+}

src/main/java/net/minecraft/src/Packet.java

@@ -1,5 +1,6 @@
 package net.minecraft.src;
 
+import net.lax1dude.eaglercraft.EaglerAdapter;
 import net.minecraft.server.MinecraftServer;
 
 import java.io.*;
@@ -25,7 +26,7 @@ public abstract class Packet
     protected ILogAgent field_98193_m;
 
     /** the system time in milliseconds when this packet was created. */
-    public final long creationTimeMillis = MinecraftServer.getSystemTimeMillis();
+    public final long creationTimeMillis = EaglerAdapter.steadyTimeMillis();
     public static long receivedID;
     public static long receivedSize;
 

src/main/java/net/minecraft/src/Packet2ClientProtocol.java

@@ -4,74 +4,62 @@ import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
 
-public class Packet2ClientProtocol extends Packet
-{
+public class Packet2ClientProtocol extends Packet {
     private int protocolVersion;
     private String username;
     private String serverHost;
-    private int serverPort;
-
-    public Packet2ClientProtocol() {}
-
-    public Packet2ClientProtocol(int par1, String par2Str, String par3Str, int par4)
-    {
-        this.protocolVersion = par1;
-        this.username = par2Str;
-        this.serverHost = par3Str;
-        this.serverPort = par4;
-    }
+    private int viewDistance;
 
     /**
      * Abstract. Reads the raw packet data from the data stream.
      */
-    public void readPacketData(DataInput par1DataInput) throws IOException
-    {
-        this.protocolVersion = par1DataInput.readByte();
-        this.username = readString(par1DataInput, 16);
-        this.serverHost = readString(par1DataInput, 255);
-        this.serverPort = par1DataInput.readInt();
+    public void readPacketData(DataInput par1DataInputStream) throws IOException {
+        this.protocolVersion = par1DataInputStream.readByte();
+        this.username = readString(par1DataInputStream, 16);
+        this.serverHost = readString(par1DataInputStream, 255);
+        this.viewDistance = par1DataInputStream.readInt();
     }
 
     /**
      * Abstract. Writes the raw packet data to the data stream.
      */
-    public void writePacketData(DataOutput par1DataOutput) throws IOException
-    {
-        par1DataOutput.writeByte(this.protocolVersion);
-        writeString(this.username, par1DataOutput);
-        writeString(this.serverHost, par1DataOutput);
-        par1DataOutput.writeInt(this.serverPort);
+    public void writePacketData(DataOutput par1DataOutputStream) throws IOException {
+        par1DataOutputStream.writeByte(this.protocolVersion);
+        writeString(this.username, par1DataOutputStream);
+        writeString(this.serverHost, par1DataOutputStream);
+        par1DataOutputStream.writeInt(this.viewDistance);
     }
 
     /**
      * Passes this Packet on to the NetHandler for processing.
      */
-    public void processPacket(NetHandler par1NetHandler)
-    {
+    public void processPacket(NetHandler par1NetHandler) {
         par1NetHandler.handleClientProtocol(this);
     }
 
     /**
      * Abstract. Return the size of the packet (not counting the header).
      */
-    public int getPacketSize()
-    {
+    public int getPacketSize() {
         return 3 + 2 * this.username.length();
     }
 
     /**
      * Returns the protocol version.
      */
-    public int getProtocolVersion()
-    {
+    public int getProtocolVersion() {
         return this.protocolVersion;
     }
 
     /**
      * Returns the username.
      */
-    public String getUsername()
-    {
+    public String getUsername() {
         return this.username;
     }
-}
+
+    public int getViewDistance() {
+        return this.viewDistance;
+    }
+
+}

src/main/java/net/minecraft/src/RegionFile.java

@@ -1,5 +1,7 @@
 package net.minecraft.src;
 
+import net.lax1dude.eaglercraft.EaglerAdapter;
+import net.lax1dude.eaglercraft.sp.RandomAccessMemoryFile;
 import net.minecraft.server.MinecraftServer;
 
 import java.io.*;
@@ -11,8 +13,7 @@ import java.util.zip.InflaterInputStream;
 public class RegionFile
 {
     private static final byte[] emptySector = new byte[4096];
-    private final File fileName;
-    private RandomAccessFile dataFile;
+    private RandomAccessMemoryFile dataFile;
     private final int[] offsets = new int[1024];
     private final int[] chunkTimestamps = new int[1024];
     private ArrayList sectorFree;
@@ -21,22 +22,16 @@ public class RegionFile
     private int sizeDelta;
     private long lastModified;
 
-    public RegionFile(File par1File)
+    public RegionFile(RandomAccessMemoryFile par1File)
     {
-        this.fileName = par1File;
         this.sizeDelta = 0;
 
         try
         {
-            if (par1File.exists())
-            {
-                this.lastModified = par1File.lastModified();
-            }
-
-            this.dataFile = new RandomAccessFile(par1File, "rw");
+            this.dataFile = par1File;
             int var2;
 
-            if (this.dataFile.length() < 4096L)
+            if (this.dataFile.getLength() < 4096L)
             {
                 for (var2 = 0; var2 < 1024; ++var2)
                 {
@@ -51,15 +46,15 @@ public class RegionFile
                 this.sizeDelta += 8192;
             }
 
-            if ((this.dataFile.length() & 4095L) != 0L)
+            if ((this.dataFile.getLength() & 4095L) != 0L)
             {
-                for (var2 = 0; (long)var2 < (this.dataFile.length() & 4095L); ++var2)
+                for (var2 = 0; (long)var2 < (this.dataFile.getLength() & 4095L); ++var2)
                 {
                     this.dataFile.write(0);
                 }
             }
 
-            var2 = (int)this.dataFile.length() / 4096;
+            var2 = (int)this.dataFile.getLength() / 4096;
             this.sectorFree = new ArrayList(var2);
             int var3;
 
@@ -70,7 +65,7 @@ public class RegionFile
 
             this.sectorFree.set(0, Boolean.valueOf(false));
             this.sectorFree.set(1, Boolean.valueOf(false));
-            this.dataFile.seek(0L);
+            this.dataFile.seek(0);
             int var4;
 
             for (var3 = 0; var3 < 1024; ++var3)
@@ -102,71 +97,50 @@ public class RegionFile
     /**
      * args: x, y - get uncompressed chunk stream from the region file
      */
-    public synchronized DataInputStream getChunkDataInputStream(int par1, int par2)
-    {
-        if (this.outOfBounds(par1, par2))
-        {
+    public synchronized DataInputStream getChunkDataInputStream(int par1, int par2) {
+        if (this.outOfBounds(par1, par2)) {
             return null;
-        }
-        else
-        {
-            try
-            {
+        } else {
+            try {
                 int var3 = this.getOffset(par1, par2);
 
-                if (var3 == 0)
-                {
+                if (var3 == 0) {
                     return null;
-                }
-                else
-                {
+                } else {
                     int var4 = var3 >> 8;
                     int var5 = var3 & 255;
 
-                    if (var4 + var5 > this.sectorFree.size())
-                    {
+                    if (var4 + var5 > this.sectorFree.size()) {
                         return null;
-                    }
-                    else
-                    {
-                        this.dataFile.seek((long)(var4 * 4096));
+                    } else {
+                        this.dataFile.seek(var4 * 4096);
                         int var6 = this.dataFile.readInt();
 
-                        if (var6 > 4096 * var5)
-                        {
+                        if (var6 > 4096 * var5) {
                             return null;
-                        }
-                        else if (var6 <= 0)
-                        {
+                        } else if (var6 <= 0) {
                             return null;
-                        }
-                        else
-                        {
+                        } else {
                             byte var7 = this.dataFile.readByte();
                             byte[] var8;
 
-                            if (var7 == 1)
-                            {
+                            if (var7 == 1) {
                                 var8 = new byte[var6 - 1];
                                 this.dataFile.read(var8);
-                                return new DataInputStream(new BufferedInputStream(new GZIPInputStream(new ByteArrayInputStream(var8))));
-                            }
-                            else if (var7 == 2)
-                            {
+                                return new DataInputStream(
+                                        new BufferedInputStream(new GZIPInputStream(new ByteArrayInputStream(var8))));
+                            } else if (var7 == 2) {
                                 var8 = new byte[var6 - 1];
                                 this.dataFile.read(var8);
-                                return new DataInputStream(new BufferedInputStream(new InflaterInputStream(new ByteArrayInputStream(var8))));
-                            }
-                            else
-                            {
+                                return new DataInputStream(new BufferedInputStream(
+                                        new InflaterInputStream(new ByteArrayInputStream(var8))));
+                            } else {
                                 return null;
                             }
                         }
                     }
                 }
-            }
-            catch (IOException var9)
-            {
+            } catch (IOException var9) {
                 return null;
             }
         }
@@ -256,7 +230,7 @@ public class RegionFile
                 }
                 else
                 {
-                    this.dataFile.seek(this.dataFile.length());
+                    this.dataFile.seek(this.dataFile.getLength());
                     var6 = this.sectorFree.size();
 
                     for (var11 = 0; var11 < var8; ++var11)
@@ -271,7 +245,7 @@ public class RegionFile
                 }
             }
 
-            this.setChunkTimestamp(par1, par2, (int)(MinecraftServer.getSystemTimeMillis() / 1000L));
+            this.setChunkTimestamp(par1, par2, (int)(EaglerAdapter.steadyTimeMillis() / 1000L));
         }
         catch (IOException var12)
         {
@@ -284,7 +258,7 @@ public class RegionFile
      */
     private void write(int par1, byte[] par2ArrayOfByte, int par3) throws IOException
     {
-        this.dataFile.seek((long)(par1 * 4096));
+        this.dataFile.seek(par1 * 4096);
         this.dataFile.writeInt(par3 + 1);
         this.dataFile.writeByte(2);
         this.dataFile.write(par2ArrayOfByte, 0, par3);
@@ -320,7 +294,7 @@ public class RegionFile
     private void setOffset(int par1, int par2, int par3) throws IOException
     {
         this.offsets[par1 + par2 * 32] = par3;
-        this.dataFile.seek((long)((par1 + par2 * 32) * 4));
+        this.dataFile.seek((par1 + par2 * 32) * 4);
         this.dataFile.writeInt(par3);
     }
 
@@ -330,18 +304,29 @@ public class RegionFile
     private void setChunkTimestamp(int par1, int par2, int par3) throws IOException
     {
         this.chunkTimestamps[par1 + par2 * 32] = par3;
-        this.dataFile.seek((long)(4096 + (par1 + par2 * 32) * 4));
+        this.dataFile.seek(4096 + (par1 + par2 * 32) * 4);
         this.dataFile.writeInt(par3);
     }
 
-    /**
-     * close this RegionFile and prevent further writes
-     */
-    public void close() throws IOException
-    {
-        if (this.dataFile != null)
-        {
-            this.dataFile.close();
+    public RandomAccessMemoryFile getFile() {
+        return dataFile;
+    }
+
+    class ChunkBuffer extends ByteArrayOutputStream {
+        private int chunkX;
+        private int chunkZ;
+
+        public ChunkBuffer(int x, int z) {
+            super(8096);
+            this.chunkX = x;
+            this.chunkZ = z;
+        }
+
+        /**+
+         * close this RegionFile and prevent further writes
+         */
+        public void close() throws IOException {
+            RegionFile.this.write(this.chunkX, this.chunkZ, this.buf, this.count);
         }
     }
 }

src/main/java/net/minecraft/src/SaveHandler.java

@@ -1,5 +1,6 @@
 package net.minecraft.src;
 
+import net.lax1dude.eaglercraft.EaglerAdapter;
 import net.minecraft.server.MinecraftServer;
 
 import java.io.*;
@@ -16,7 +17,7 @@ public class SaveHandler implements ISaveHandler, IPlayerFileData
     /**
      * The time in milliseconds when this field was initialized. Stored in the session lock file.
      */
-    private final long initializationTime = MinecraftServer.getSystemTimeMillis();
+    private final long initializationTime = EaglerAdapter.steadyTimeMillis();
 
     /** The directory name of the world */
     private final String saveDirectoryName;

src/main/java/net/minecraft/src/ServerConfigurationManager.java

@@ -254,6 +254,19 @@ public abstract class ServerConfigurationManager
     /**
      * checks ban-lists, then white-lists, then space for the server. Returns null on success, or an error message
      */
+    public String allowUserToConnect(String par2Str) {
+        if(this.playerEntityList.size() >= this.maxPlayers) {
+            return "The server is full!";
+        }else {
+            for(EntityPlayerMP pp : (List<EntityPlayerMP>)this.playerEntityList) {
+                if(pp.username.equalsIgnoreCase(par2Str)) {
+                    return "Someone with your username is already on this world";
+                }
+            }
+            return null;
+        }
+    }
+
     public String allowUserToConnect(SocketAddress par1SocketAddress, String par2Str)
     {
         if (this.bannedPlayers.isBanned(par2Str))

src/main/java/net/minecraft/src/StringTranslate.java

@@ -2,6 +2,7 @@ package net.minecraft.src;
 
 import java.io.IOException;
 import java.util.IllegalFormatException;
+import java.util.List;
 import java.util.Properties;
 import java.util.TreeMap;
 
@@ -25,6 +26,10 @@ public class StringTranslate {
         this.loadLanguageList();
     }
 
+    public static void init(List<String> en_us) {
+        instance.loadLanguageList();
+    }
+
     /**
      * Return the StringTranslate singleton instance
      */

src/main/java/net/minecraft/src/World.java

@@ -1,5 +1,6 @@
 package net.minecraft.src;
 
+import net.lax1dude.eaglercraft.EaglerAdapter;
 import net.lax1dude.eaglercraft.EaglercraftRandom;
 import net.minecraft.server.MinecraftServer;
 
@@ -4021,7 +4022,7 @@ public abstract class World implements IBlockAccess
     {
         if (this.getTotalWorldTime() % 600L == 0L)
         {
-            this.theCalendar.setTimeInMillis(MinecraftServer.getSystemTimeMillis());
+            this.theCalendar.setTimeInMillis(EaglerAdapter.steadyTimeMillis());
         }
 
         return this.theCalendar;

src/main/java/net/minecraft/src/WorldInfo.java

@@ -1,5 +1,6 @@
 package net.minecraft.src;
 
+import net.lax1dude.eaglercraft.EaglerAdapter;
 import net.minecraft.server.MinecraftServer;
 
 public class WorldInfo
@@ -251,7 +252,7 @@ public class WorldInfo
         par1NBTTagCompound.setLong("Time", this.totalTime);
         par1NBTTagCompound.setLong("DayTime", this.worldTime);
         par1NBTTagCompound.setLong("SizeOnDisk", this.sizeOnDisk);
-        par1NBTTagCompound.setLong("LastPlayed", MinecraftServer.getSystemTimeMillis());
+        par1NBTTagCompound.setLong("LastPlayed", EaglerAdapter.steadyTimeMillis());
         par1NBTTagCompound.setString("LevelName", this.levelName);
         par1NBTTagCompound.setInteger("version", this.saveVersion);
         par1NBTTagCompound.setInteger("rainTime", this.rainTime);

src/main/java/net/minecraft/src/WorldServer.java

@@ -1,6 +1,7 @@
 package net.minecraft.src;
 
 import net.lax1dude.eaglercraft.EaglercraftRandom;
+import net.lax1dude.eaglercraft.sp.SysUtil;
 import net.minecraft.server.MinecraftServer;
 
 import java.util.*;
@@ -45,6 +46,20 @@ public class WorldServer extends World
     /** An IntHashMap of entity IDs (integers) to their Entity objects. */
     private IntHashMap entityIdMap;
 
+    private int r = 0;
+    private int w = 0;
+    private int g = 0;
+    private int tu = 0;
+    private int lu = 0;
+
+    private int _r = 0;
+    private int _w = 0;
+    private int _g = 0;
+    private int _tu = 0;
+    private int _lu = 0;
+
+    private long rwgtuluTimer = 0l;
+
     public WorldServer(MinecraftServer par1MinecraftServer, ISaveHandler par2ISaveHandler, String par3Str, int par4, WorldSettings par5WorldSettings, ILogAgent par7ILogAgent)
     {
         super(par2ISaveHandler, par3Str, par5WorldSettings, WorldProvider.getProviderForDimension(par4));
@@ -133,6 +148,42 @@ public class WorldServer extends World
         this.villageSiegeObj.tick();
         this.worldTeleporter.removeStalePortalLocations(this.getTotalWorldTime());
         this.sendAndApplyBlockEvents();
+
+        _r += this.theChunkProviderServer.statR();
+        _w += this.theChunkProviderServer.statW();
+        _g += this.theChunkProviderServer.statG();
+        _lu += Chunk.totalBlockLightUpdates;
+        Chunk.totalBlockLightUpdates = 0;
+
+        long millis = SysUtil.steadyTimeMillis();
+        if(millis - rwgtuluTimer >= 1000l) {
+            rwgtuluTimer = millis;
+            r = _r; _r = 0;
+            w = _w; _w = 0;
+            g = _g; _g = 0;
+            tu = _tu; _tu = 0;
+            lu = _lu; _lu = 0;
+        }
+    }
+
+    public int getR() {
+        return r;
+    }
+
+    public int getW() {
+        return w;
+    }
+
+    public int getG() {
+        return g;
+    }
+
+    public int getTU() {
+        return tu;
+    }
+
+    public int getLU() {
+        return lu;
     }
 
     /**