4 files changed, 16 insertions, 16 deletions
diff --git a/src/core/inventory.cc b/src/core/inventory.cc
index 8f8c41a..03cd21e 100644
--- a/src/core/inventory.cc
+++ b/src/core/inventory.cc
@@ -65,10 +65,10 @@ void Inventory::remove(Item *item)
 	}
 }
 
-Item *Inventory::find(const Info *info)
+Item *Inventory::find(const Info *info) const
 {
 	// sarch the inventory for a specified item type
-	for (Items::iterator it = inventory_items.begin(); it != inventory_items.end(); it++) {
+	for (Items::const_iterator it = inventory_items.begin(); it != inventory_items.end(); it++) {
 		Item *item = (*it);
 		if (item->info() == info) {
 			return item;
diff --git a/src/core/inventory.h b/src/core/inventory.h
index aff9790..805d943 100644
--- a/src/core/inventory.h
+++ b/src/core/inventory.h
@@ -72,6 +72,11 @@ public:
 		return inventory_capacity - inventory_capacity_used;
 	}
 	
+	/**
+	  * @brief search the inventory for a specific item type
+	  */
+	 Item *find(const Info *info) const;
+	
 	/* ---- mutators --------------------------------------------------- */
 	
 	/**
@@ -88,12 +93,7 @@ public:
 	 * @brief removes all items from the inventory and delete them
 	 */
 	 void clear();
-	 
-	 /**
-	  * @brief search the inventory for a specific item type
-	  */
-	 Item *find(const Info *info);
-	 	
+	  	
 	/**
 	 * @brief set the timestamp
 	 */
diff --git a/src/core/item.cc b/src/core/item.cc
index ca51775..77b0f9c 100644
--- a/src/core/item.cc
+++ b/src/core/item.cc
@@ -25,17 +25,17 @@ Item::~Item()
 	item_amount = 0;
 }
 
-void Item::set_amount(const int amount)
+void Item::set_amount(const long amount)
 {
 	item_amount = amount;
 }
 
-void Item::inc_amount(const int amount)
+void Item::inc_amount(const long amount)
 {
 	item_amount += amount;
 }
 
-void Item::dec_amount(const int amount)
+void Item::dec_amount(const long amount)
 {
 	item_amount -= amount;
 }
diff --git a/src/core/item.h b/src/core/item.h
index cc81249..9c17dc9 100644
--- a/src/core/item.h
+++ b/src/core/item.h
@@ -28,7 +28,7 @@ public:
 	/**
 	 * @brief associated amount
 	 */
-	 inline int amount() const { return item_amount; }
+	 inline long amount() const { return item_amount; }
 
 	/**
 	 * @brief information card
@@ -45,18 +45,18 @@ public:
 	/**
 	 * @brief set associated amount
 	 */
-	 void set_amount(const int amount);
+	 void set_amount(const long amount);
 	 
-	 void inc_amount(const int amount);
+	 void inc_amount(const long amount);
 	 
-	 void dec_amount(const int amount);
+	 void dec_amount(const long amount);
 	 
 	 void set_price(const long price);
 	
 private:
 	const Info		*item_info;
 	long			item_price;
-	int 			item_amount;
+	long 			item_amount;
 };
 
 } // namespace core