gt:                     while (itemstack.stackSize > 0)
context: package net.minecraft.block;
  
  import cpw.mods.fml.relauncher.Side;
  import cpw.mods.fml.relauncher.SideOnly;
  import java.util.Random;
  import net.minecraft.block.material.Material;
  import net.minecraft.client.renderer.texture.IIconRegister;
  import net.minecraft.creativetab.CreativeTabs;
  import net.minecraft.dispenser.BehaviorDefaultDispenseItem;
  import net.minecraft.dispenser.IBehaviorDispenseItem;
  import net.minecraft.dispenser.IBlockSource;
  import net.minecraft.dispenser.IPosition;
  import net.minecraft.dispenser.PositionImpl;
  import net.minecraft.entity.EntityLivingBase;
  import net.minecraft.entity.item.EntityItem;
  import net.minecraft.entity.player.EntityPlayer;
  import net.minecraft.inventory.Container;
  import net.minecraft.inventory.IInventory;
  import net.minecraft.item.ItemStack;
  import net.minecraft.nbt.NBTTagCompound;
  import net.minecraft.tileentity.TileEntity;
  import net.minecraft.tileentity.TileEntityDispenser;
  import net.minecraft.util.EnumFacing;
  import net.minecraft.util.IIcon;
  import net.minecraft.util.IRegistry;
  import net.minecraft.util.RegistryDefaulted;
  import net.minecraft.world.World;
  
  public class BlockDispenser extends BlockContainer
  {
      public static final IRegistry dispenseBehaviorRegistry = new RegistryDefaulted(new BehaviorDefaultDispenseItem());
      protected Random field_149942_b = new Random();
      @SideOnly(Side.CLIENT)
      protected IIcon field_149944_M;
      @SideOnly(Side.CLIENT)
      protected IIcon field_149945_N;
      @SideOnly(Side.CLIENT)
      protected IIcon field_149946_O;
      private static final String __OBFID = "CL_00000229";
  
      protected BlockDispenser()
      {
          super(Material.rock);
          this.setCreativeTab(CreativeTabs.tabRedstone);
      }
  
      public int tickRate(World p_149738_1_)
      {
          return 4;
      }
  
      public void onBlockAdded(World p_149726_1_, int p_149726_2_, int p_149726_3_, int p_149726_4_)
      {
          super.onBlockAdded(p_149726_1_, p_149726_2_, p_149726_3_, p_149726_4_);
          this.func_149938_m(p_149726_1_, p_149726_2_, p_149726_3_, p_149726_4_);
      }
  
      private void func_149938_m(World p_149938_1_, int p_149938_2_, int p_149938_3_, int p_149938_4_)
      {
          if (!p_149938_1_.isRemote)
          {
              Block block = p_149938_1_.getBlock(p_149938_2_, p_149938_3_, p_149938_4_ - 1);
              Block block1 = p_149938_1_.getBlock(p_149938_2_, p_149938_3_, p_149938_4_ + 1);
              Block block2 = p_149938_1_.getBlock(p_149938_2_ - 1, p_149938_3_, p_149938_4_);
              Block block3 = p_149938_1_.getBlock(p_149938_2_ + 1, p_149938_3_, p_149938_4_);
              byte b0 = 3;
  
              if (block.func_149730_j() && !block1.func_149730_j())
              {
                  b0 = 3;
              }
  
              if (block1.func_149730_j() && !block.func_149730_j())
              {
                  b0 = 2;
              }
  
              if (block2.func_149730_j() && !block3.func_149730_j())
              {
                  b0 = 5;
              }
  
              if (block3.func_149730_j() && !block2.func_149730_j())
              {
                  b0 = 4;
              }
  
              p_149938_1_.setBlockMetadataWithNotify(p_149938_2_, p_149938_3_, p_149938_4_, b0, 2);
          }
      }
  
      @SideOnly(Side.CLIENT)
      public IIcon getIcon(int p_149691_1_, int p_149691_2_)
      {
          int k = p_149691_2_ & 7;
          return p_149691_1_ == k ? (k != 1 && k != 0 ? this.field_149945_N : this.field_149946_O) : (k != 1 && k != 0 ? (p_149691_1_ != 1 && p_149691_1_ != 0 ? this.blockIcon : this.field_149944_M) : this.field_149944_M);
      }
  
      @SideOnly(Side.CLIENT)
      public void registerBlockIcons(IIconRegister p_149651_1_)
      {
          this.blockIcon = p_149651_1_.registerIcon("furnace_side");
          this.field_149944_M = p_149651_1_.registerIcon("furnace_top");
          this.field_149945_N = p_149651_1_.registerIcon(this.getTextureName() + "_front_horizontal");
          this.field_149946_O = p_149651_1_.registerIcon(this.getTextureName() + "_front_vertical");
      }
  
      public boolean onBlockActivated(World p_149727_1_, int p_149727_2_, int p_149727_3_, int p_149727_4_, EntityPlayer p_149727_5_, int p_149727_6_, float p_149727_7_, float p_149727_8_, float p_149727_9_)
      {
          if (p_149727_1_.isRemote)
          {
              return true;
          }
          else
          {
              TileEntityDispenser tileentitydispenser = (TileEntityDispenser)p_149727_1_.getTileEntity(p_149727_2_, p_149727_3_, p_149727_4_);
  
              if (tileentitydispenser != null)
              {
                  p_149727_5_.func_146102_a(tileentitydispenser);
              }
  
              return true;
          }
      }
  
      protected void func_149941_e(World p_149941_1_, int p_149941_2_, int p_149941_3_, int p_149941_4_)
      {
          BlockSourceImpl blocksourceimpl = new BlockSourceImpl(p_149941_1_, p_149941_2_, p_149941_3_, p_149941_4_);
          TileEntityDispenser tileentitydispenser = (TileEntityDispenser)blocksourceimpl.getBlockTileEntity();
  
          if (tileentitydispenser != null)
          {
              int l = tileentitydispenser.func_146017_i();
  
              if (l < 0)
              {
                  p_149941_1_.playAuxSFX(1001, p_149941_2_, p_149941_3_, p_149941_4_, 0);
              }
              else
              {
                  ItemStack itemstack = tileentitydispenser.getStackInSlot(l);
                  IBehaviorDispenseItem ibehaviordispenseitem = this.func_149940_a(itemstack);
  
                  if (ibehaviordispenseitem != IBehaviorDispenseItem.itemDispenseBehaviorProvider)
                  {
                      ItemStack itemstack1 = ibehaviordispenseitem.dispense(blocksourceimpl, itemstack);
                      tileentitydispenser.setInventorySlotContents(l, itemstack1.stackSize == 0 ? null : itemstack1);
                  }
              }
          }
      }
  
      protected IBehaviorDispenseItem func_149940_a(ItemStack p_149940_1_)
      {
          return (IBehaviorDispenseItem)dispenseBehaviorRegistry.getObject(p_149940_1_.getItem());
      }
  
      public void onNeighborBlockChange(World p_149695_1_, int p_149695_2_, int p_149695_3_, int p_149695_4_, Block p_149695_5_)
      {
          boolean flag = p_149695_1_.isBlockIndirectlyGettingPowered(p_149695_2_, p_149695_3_, p_149695_4_) || p_149695_1_.isBlockIndirectlyGettingPowered(p_149695_2_, p_149695_3_ + 1, p_149695_4_);
          int l = p_149695_1_.getBlockMetadata(p_149695_2_, p_149695_3_, p_149695_4_);
          boolean flag1 = (l & 8) != 0;
  
          if (flag && !flag1)
          {
              p_149695_1_.scheduleBlockUpdate(p_149695_2_, p_149695_3_, p_149695_4_, this, this.tickRate(p_149695_1_));
              p_149695_1_.setBlockMetadataWithNotify(p_149695_2_, p_149695_3_, p_149695_4_, l | 8, 4);
          }
          else if (!flag && flag1)
          {
              p_149695_1_.setBlockMetadataWithNotify(p_149695_2_, p_149695_3_, p_149695_4_, l & -9, 4);
          }
      }
  
      public void updateTick(World p_149674_1_, int p_149674_2_, int p_149674_3_, int p_149674_4_, Random p_149674_5_)
      {
          if (!p_149674_1_.isRemote)
          {
              this.func_149941_e(p_149674_1_, p_149674_2_, p_149674_3_, p_149674_4_);
          }
      }
  
      public TileEntity createNewTileEntity(World p_149915_1_, int p_149915_2_)
      {
          return new TileEntityDispenser();
      }
  
      public void onBlockPlacedBy(World p_149689_1_, int p_149689_2_, int p_149689_3_, int p_149689_4_, EntityLivingBase p_149689_5_, ItemStack p_149689_6_)
      {
          int l = BlockPistonBase.determineOrientation(p_149689_1_, p_149689_2_, p_149689_3_, p_149689_4_, p_149689_5_);
          p_149689_1_.setBlockMetadataWithNotify(p_149689_2_, p_149689_3_, p_149689_4_, l, 2);
  
          if (p_149689_6_.hasDisplayName())
          {
              ((TileEntityDispenser)p_149689_1_.getTileEntity(p_149689_2_, p_149689_3_, p_149689_4_)).func_146018_a(p_149689_6_.getDisplayName());
          }
      }
  
      public void breakBlock(World p_149749_1_, int p_149749_2_, int p_149749_3_, int p_149749_4_, Block p_149749_5_, int p_149749_6_)
      {
          TileEntityDispenser tileentitydispenser = (TileEntityDispenser)p_149749_1_.getTileEntity(p_149749_2_, p_149749_3_, p_149749_4_);
  
          if (tileentitydispenser != null)
          {
              for (int i1 = 0; i1 < tileentitydispenser.getSizeInventory(); ++i1)
              {
                  ItemStack itemstack = tileentitydispenser.getStackInSlot(i1);
  
                  if (itemstack != null)
                  {
                      float f = this.field_149942_b.nextFloat() * 0.8F + 0.1F;
                      float f1 = this.field_149942_b.nextFloat() * 0.8F + 0.1F;
                      float f2 = this.field_149942_b.nextFloat() * 0.8F + 0.1F;
  
  