/// <summary>
/// merges provided ItemStack with the first avaliable one in the container/player inventory
/// </summary>
protected virtual bool MergeItemStack(ItemStack par1ItemStack, int par2, int par3, bool par4)
{
bool flag = false;
int i = par2;
if (par4)
{
i = par3 - 1;
}
if (par1ItemStack.IsStackable())
{
while (par1ItemStack.StackSize > 0 && (!par4 && i < par3 || par4 && i >= par2))
{
Slot slot = InventorySlots[i];
ItemStack itemstack = slot.GetStack();
if (itemstack != null && itemstack.ItemID == par1ItemStack.ItemID && (!par1ItemStack.GetHasSubtypes() || par1ItemStack.GetItemDamage() == itemstack.GetItemDamage()) && ItemStack.Func_46154_a(par1ItemStack, itemstack))
{
int k = itemstack.StackSize + par1ItemStack.StackSize;
if (k <= par1ItemStack.GetMaxStackSize())
{
par1ItemStack.StackSize = 0;
itemstack.StackSize = k;
slot.OnSlotChanged();
flag = true;
}
else if (itemstack.StackSize < par1ItemStack.GetMaxStackSize())
{
par1ItemStack.StackSize -= par1ItemStack.GetMaxStackSize() - itemstack.StackSize;
itemstack.StackSize = par1ItemStack.GetMaxStackSize();
slot.OnSlotChanged();
flag = true;
}
}
if (par4)
{
i--;
}
else
{
i++;
}
}
}
if (par1ItemStack.StackSize > 0)
{
int j;
if (par4)
{
j = par3 - 1;
}
else
{
j = par2;
}
do
{
if ((par4 || j >= par3) && (!par4 || j < par2))
{
break;
}
Slot slot1 = InventorySlots[j];
ItemStack itemstack1 = slot1.GetStack();
if (itemstack1 == null)
{
slot1.PutStack(par1ItemStack.Copy());
slot1.OnSlotChanged();
par1ItemStack.StackSize = 0;
flag = true;
break;
}
if (par4)
{
j--;
}
else
{
j++;
}
}while (true);
}
return(flag);
}