Hi,

 

I'm trying to make a coremod (to update my tile entity's nbt when an S35PacketUpdateTileEntity is received) since Forge isn't out for 1.8 yet and I have run into a problem with Labels. I need to jump to an existing label, and I'm not sure how. Anyone know how to do this? Heres my code:

@Override
public byte[] transform(String name, String transformedName, byte[] clazz) {
	if (name.equals(NHPCName.replace("/", "."))){
		ClassNode classnode = CoreUtils.getClassNode(clazz);
		MethodNode teMethodNode = CoreUtils.getMethodNode(classnode, handleUpdateTileEntityName, "(Lnet/minecraft/network/play/server/S35PacketUpdateTileEntity;)V");

		InsnList instructions = new InsnList();

		instructions.add(new VarInsnNode(Opcodes.ALOAD, 2));
		instructions.add(new TypeInsnNode(Opcodes.INSTANCEOF, "com/eternaldoom/realmsofchaos/blocks/TileEntityDisplayCase"));
		Label l7 = new Label();
		instructions.add(new JumpInsnNode(Opcodes.IFNE, new LabelNode(l7)));	

		teMethodNode.instructions.insertBefore(getInsertionPoint(teMethodNode), instructions);
    }
	return clazz;
}

I'm trying to patch this method in NetHandlerPlayClient:

public void handleUpdateTileEntity(S35PacketUpdateTileEntity packetIn)
    {
        PacketThreadUtil.func_180031_a(packetIn, this, this.gameController);

        if (this.gameController.theWorld.isBlockLoaded(packetIn.func_179823_a()))
        {
            TileEntity tileentity = this.gameController.theWorld.getTileEntity(packetIn.func_179823_a());
            int i = packetIn.getTileEntityType();

            if (i == 1 && tileentity instanceof TileEntityMobSpawner || i == 2 && tileentity instanceof TileEntityCommandBlock || i == 3 && tileentity instanceof TileEntityBeacon || i == 4 && tileentity instanceof TileEntitySkull || i == 5 && tileentity instanceof TileEntityFlowerPot || i == 6 && tileentity instanceof TileEntityBanner)
            {
                tileentity.readFromNBT(packetIn.getNbtCompound());
            }
        }
    }

I just need to add my tile entity to the if statement. The problem is, I need to jump to the label L7 (tileentity.readFromNBT) and I can't figure out how.

Never mind, that was a stupid question, all I had to do was call a method in my class. Heres my code if anyone is interested:

if (name.equals(netHandlerPlayClientName.replace("/", "."))){
		ClassNode classnode = CoreUtils.getClassNode(clazz);
		MethodNode teMethodNode = CoreUtils.getMethodNode(classnode, handleUpdateTileEntityName, "(Lnet/minecraft/network/play/server/S35PacketUpdateTileEntity;)V");

		InsnList instructions = new InsnList();

		instructions.add(new VarInsnNode(Opcodes.ALOAD, 2));
		instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
		instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "com/eternaldoom/realmsofchaos/asm/CoreMethods", "handleTileEntityPackets", "(Lnet/minecraft/tileentity/TileEntity;Lnet/minecraft/network/play/server/S35PacketUpdateTileEntity;)V", false));

		teMethodNode.instructions.insertBefore(getTEInsertionPoint(teMethodNode), instructions);
		return CoreUtils.getBytes(classnode);
    }