protected boolean a(ItemStack itemstack, int i, int j, boolean flag) {
boolean flag1 = false;
int k = i;
if (flag) {
k = j - 1;
}
Slot slot;
ItemStack itemstack1;
if (itemstack.isStackable()) {
while (itemstack.count > 0 && (!flag && k < j || flag && k >= i)) {
slot = (Slot) this.c.get(k);
itemstack1 = slot.getItem();
if (itemstack1 != null
&& itemstack1.id == itemstack.id
&& (!itemstack.usesData() || itemstack.getData() == itemstack1.getData())
&& ItemStack.equals(itemstack, itemstack1)) {
int l = itemstack1.count + itemstack.count;
if (l <= itemstack.getMaxStackSize()) {
itemstack.count = 0;
itemstack1.count = l;
slot.e();
flag1 = true;
} else if (itemstack1.count < itemstack.getMaxStackSize()) {
itemstack.count -= itemstack.getMaxStackSize() - itemstack1.count;
itemstack1.count = itemstack.getMaxStackSize();
slot.e();
flag1 = true;
}
}
if (flag) {
--k;
} else {
++k;
}
}
}
if (itemstack.count > 0) {
if (flag) {
k = j - 1;
} else {
k = i;
}
while (!flag && k < j || flag && k >= i) {
slot = (Slot) this.c.get(k);
itemstack1 = slot.getItem();
if (itemstack1 == null) {
slot.set(itemstack.cloneItemStack());
slot.e();
itemstack.count = 0;
flag1 = true;
break;
}
if (flag) {
--k;
} else {
++k;
}
}
}
return flag1;
}
