Inventory (WIP part I)

src/items/ItemStack.cpp

@@ -0,0 +1,40 @@
+#include "ItemStack.h"
+
+#include "ItemDef.h"
+#include "../content/Content.h"
+
+ItemStack::ItemStack() : item(ITEM_EMPTY), count(0) {
+}
+
+ItemStack::ItemStack(itemid_t item, itemcount_t count) : item(item), count(count) {
+}
+
+void ItemStack::set(const ItemStack& item) {
+    this->item = item.item;
+    this->count = item.count;
+}
+
+bool ItemStack::accepts(const ItemStack& other) const {
+    if (isEmpty()) {
+        return true;
+    }
+    return item == other.getItemId();
+}
+
+void ItemStack::move(ItemStack& item, const ContentIndices* indices) {
+    auto def = indices->getItemDef(item.getItemId());
+    int count = std::min(item.count, def->stackSize-this->count);
+    if (isEmpty()) {
+        set(ItemStack(item.getItemId(), count));
+    } else {
+        setCount(this->count + count);
+    }
+    item.setCount(item.count-count);
+}
+
+void ItemStack::setCount(itemcount_t count) {
+    this->count = count;
+    if (count == 0) {
+        item = 0;
+    }
+}