public ItemStack transferStackInSlot(EntityPlayer playerIn, int index)
    {
        ItemStack itemstack = ItemStack.EMPTY;
        Slot slot = this.inventorySlots.get(index);

        if (slot != null && slot.getHasStack())
        {
            ItemStack itemstack1 = slot.getStack();
            itemstack = itemstack1.copy();

            if (index == 2)
            {
                if (!this.mergeItemStack(itemstack1, 3, 39, true))
                {
                    return ItemStack.EMPTY;
                }

                slot.onSlotChange(itemstack1, itemstack);
            }
            else if (index != 1 && index != 0)
            {
                if (!FurnaceRecipes.instance().getSmeltingResult(itemstack1).isEmpty() && !TileEntityForceFurnace.isItemFuel(itemstack1))
                {
                    if (!this.mergeItemStack(itemstack1, 0, 1, false))
                    {
                        return ItemStack.EMPTY;
                    }
                }
                else if (TileEntityForceFurnace.isItemFuel(itemstack1))
                {
                    if (!this.mergeItemStack(itemstack1, 1, 2, false))
                    {
                        return ItemStack.EMPTY;
                    }
                }
                else if (index >= 3 && index < 30)
                {
                    if (!this.mergeItemStack(itemstack1, 30, 39, false))
                    {
                        return ItemStack.EMPTY;
                    }
                }
                else if (index >= 30 && index < 39 && !this.mergeItemStack(itemstack1, 3, 30, false))
                {
                    return ItemStack.EMPTY;
                }
            }
            else if (!this.mergeItemStack(itemstack1, 3, 39, false))
            {
                return ItemStack.EMPTY;
            }

            if (itemstack1.isEmpty())
            {
                slot.putStack(ItemStack.EMPTY);
            }
            else
            {
                slot.onSlotChanged();
            }

            if (itemstack1.getCount() == itemstack.getCount())
            {
                return ItemStack.EMPTY;
            }

            slot.onTake(playerIn, itemstack1);
        }

        return itemstack;
    }