Compile

minecraft_server/src/net/minecraft/server/MinecraftServer.java

@@ -114,7 +114,7 @@ public class MinecraftServer implements ICommandListener, Runnable {
 		this.worldMngr.func_4072_a(new WorldManager(this));
 		this.worldMngr.monstersEnabled = this.propertyManagerObj.getBooleanProperty("spawn-monsters", true) ? 1 : 0;
 		this.configManager.setPlayerManager(this.worldMngr);
-		byte var2 = 10;
+		byte var2 = 20;
 
 		for(int var3 = -var2; var3 <= var2; ++var3) {
 			this.func_6019_a("Preparing spawn area", (var3 + var2) * 100 / (var2 + var2 + 1));

minecraft_server/src/net/minecraft/src/NetServerHandler.java

@@ -231,6 +231,9 @@ public class NetServerHandler extends NetHandler implements ICommandListener {
 			if(var16 < 256.0D) {
 				this.playerEntity.field_421_a.sendPacket(new Packet53BlockChange(var4, var5, var6, this.mcServer.worldMngr));
 			}
+			if(!(var19 > 16 || var2)) {
+				this.playerEntity.field_421_a.sendPacket(new Packet3Chat("You cannot place/break blocks in this area!"));
+			}
 		}
 
 		this.mcServer.worldMngr.field_819_z = false;
@@ -252,10 +255,8 @@ public class NetServerHandler extends NetHandler implements ICommandListener {
 				var8 = var7;
 			}
 
-			if(var8 > 16 || var2) {
 			ItemStack var9 = var1.id >= 0 ? new ItemStack(var1.id) : null;
 			this.playerEntity.field_425_ad.func_327_a(this.playerEntity, this.mcServer.worldMngr, var9, var10, var4, var5, var6);
-			}
 
 			this.playerEntity.field_421_a.sendPacket(new Packet53BlockChange(var10, var4, var5, this.mcServer.worldMngr));
 			if(var6 == 0) {
@@ -283,6 +284,23 @@ public class NetServerHandler extends NetHandler implements ICommandListener {
 			}
 
 			this.playerEntity.field_421_a.sendPacket(new Packet53BlockChange(var10, var4, var5, this.mcServer.worldMngr));
+			
+			if(!(var8 > 16 | var2)) {
+				if(field_10_k != null) {
+					this.playerEntity.field_421_a.sendPacket(new Packet3Chat("You cannot place/break blocks in this area!"));
+					this.playerEntity.field_425_ad.func_323_b(var10, var4, var5);
+					this.playerEntity.field_421_a.sendPacket(new Packet53BlockChange(var10, var4, var5, this.mcServer.worldMngr));
+					ItemStack[] stack = this.playerEntity.inventory.mainInventory.clone();
+					ItemStack stack1 = new ItemStack(var1.id);
+					if(stack[this.playerEntity.inventory.currentItem] != null) {
+						stack1.stackSize = stack[this.playerEntity.inventory.currentItem].stackSize + 1;	
+					} else {
+						stack1.stackSize = 1;
+					}
+					stack[this.playerEntity.inventory.currentItem] = stack1;
+					this.playerEntity.field_421_a.sendPacket(new Packet5PlayerInventory(-1, stack));
+				}
+			}
 		}
 
 		this.mcServer.worldMngr.field_819_z = false;

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

@@ -59,7 +59,7 @@ public class Chunk {
 	}
 
 	public int getHeightValue(int var1, int var2) {
-		return this.heightMap[var2 << 4 | var1] & 255;
+		return this.heightMap[var2 << 4 | var1] & 0xff;
 	}
 
 	public void func_1014_a() {

src/main/java/net/minecraft/src/NibbleArray.java

@@ -15,7 +15,11 @@ public class NibbleArray {
 		int var4 = var1 << 11 | var3 << 7 | var2;
 		int var5 = var4 >> 1;
 		int var6 = var4 & 1;
-		return var6 == 0 ? this.data[var5] & 15 : this.data[var5] >> 4 & 15;
+		if (var6 == 0) {
+			return data[var5] & 0xf;
+		} else {
+			return data[var5] >> 4 & 0xf;
+		}
 	}
 
 	public void setNibble(int var1, int var2, int var3, int var4) {
@@ -23,9 +27,9 @@ public class NibbleArray {
 		int var6 = var5 >> 1;
 		int var7 = var5 & 1;
 		if (var7 == 0) {
-			this.data[var6] = (byte)(this.data[var6] & 240 | var4 & 15);
+			data[var6] = (byte) (data[var6] & 0xf0 | var4 & 0xf);
 		} else {
-			this.data[var6] = (byte)(this.data[var6] & 15 | (var4 & 15) << 4);
+			data[var6] = (byte) (data[var6] & 0xf | (var4 & 0xf) << 4);
 		}
 
 	}