Fix the documentation of InvRef:get_lists() and clean up code (#12150)

src/script/common/c_content.cpp

@@ -1351,17 +1351,22 @@ void push_tool_capabilities(lua_State *L,
 }
 
 /******************************************************************************/
-void push_inventory_list(lua_State *L, Inventory *inv, const char *name)
+void push_inventory_list(lua_State *L, const InventoryList &invlist)
 {
-	InventoryList *invlist = inv->getList(name);
-	if(invlist == NULL){
-		lua_pushnil(L);
-		return;
+	push_items(L, invlist.getItems());
+}
+
+/******************************************************************************/
+void push_inventory_lists(lua_State *L, const Inventory &inv)
+{
+	const auto &lists = inv.getLists();
+	lua_createtable(L, 0, lists.size());
+	for(const InventoryList *list : lists) {
+		const std::string &name = list->getName();
+		lua_pushlstring(L, name.c_str(), name.size());
+		push_inventory_list(L, *list);
+		lua_rawset(L, -3);
 	}
-	std::vector<ItemStack> items;
-	for(u32 i=0; i<invlist->getSize(); i++)
-		items.push_back(invlist->getItem(i));
-	push_items(L, items);
 }
 
 /******************************************************************************/

src/script/common/c_content.h

@@ -55,6 +55,7 @@ struct ObjectProperties;
 struct SimpleSoundSpec;
 struct ServerSoundParams;
 class Inventory;
+class InventoryList;
 struct NodeBox;
 struct ContentFeatures;
 struct TileDef;
@@ -120,8 +121,9 @@ void               push_object_properties    (lua_State *L,
                                               ObjectProperties *prop);
 
 void               push_inventory_list       (lua_State *L,
-                                              Inventory *inv,
-                                              const char *name);
+                                              const InventoryList &invlist);
+void               push_inventory_lists      (lua_State *L,
+                                              const Inventory &inv);
 void               read_inventory_list       (lua_State *L, int tableindex,
                                               Inventory *inv, const char *name,
                                               Server *srv, int forcesize=-1);

src/script/cpp_api/s_client.cpp

@@ -281,15 +281,7 @@ bool ScriptApiClient::on_inventory_open(Inventory *inventory)
 	lua_getglobal(L, "core");
 	lua_getfield(L, -1, "registered_on_inventory_open");
 
-	std::vector<const InventoryList*> lists = inventory->getLists();
-	std::vector<const InventoryList*>::iterator iter = lists.begin();
-	lua_createtable(L, 0, lists.size());
-	for (; iter != lists.end(); iter++) {
-		const char* name = (*iter)->getName().c_str();
-		lua_pushstring(L, name);
-		push_inventory_list(L, inventory, name);
-		lua_rawset(L, -3);
-	}
+	push_inventory_lists(L, *inventory);
 
 	try {
 		runCallbacks(1, RUN_CALLBACKS_MODE_OR);

src/script/lua_api/l_inventory.cpp

@@ -214,11 +214,16 @@ int InvRef::l_get_list(lua_State *L)
 	InvRef *ref = checkobject(L, 1);
 	const char *listname = luaL_checkstring(L, 2);
 	Inventory *inv = getinv(L, ref);
-	if(inv){
-		push_inventory_list(L, inv, listname);
-	} else {
+	if (!inv) {
 		lua_pushnil(L);
+		return 1;
 	}
+	InventoryList *invlist = inv->getList(listname);
+	if (!invlist) {
+		lua_pushnil(L);
+		return 1;
+	}
+	push_inventory_list(L, *invlist);
 	return 1;
 }
 
@@ -242,7 +247,7 @@ int InvRef::l_set_list(lua_State *L)
 	return 0;
 }
 
-// get_lists(self) -> list of InventoryLists
+// get_lists(self) -> table that maps listnames to InventoryLists
 int InvRef::l_get_lists(lua_State *L)
 {
 	NO_MAP_LOCK_REQUIRED;
@@ -251,15 +256,7 @@ int InvRef::l_get_lists(lua_State *L)
 	if (!inv) {
 		return 0;
 	}
-	std::vector<const InventoryList*> lists = inv->getLists();
-	std::vector<const InventoryList*>::iterator iter = lists.begin();
-	lua_createtable(L, 0, lists.size());
-	for (; iter != lists.end(); iter++) {
-		const char* name = (*iter)->getName().c_str();
-		lua_pushstring(L, name);
-		push_inventory_list(L, inv, name);
-		lua_rawset(L, -3);
-	}
+	push_inventory_lists(L, *inv);
 	return 1;
 }
 

src/script/lua_api/l_nodemeta.cpp

@@ -127,18 +127,14 @@ void NodeMetaRef::handleToTable(lua_State *L, Metadata *_meta)
 	// fields
 	MetaDataRef::handleToTable(L, _meta);
 
-	NodeMetadata *meta = (NodeMetadata*) _meta;
+	NodeMetadata *meta = (NodeMetadata *) _meta;
 
 	// inventory
-	lua_newtable(L);
 	Inventory *inv = meta->getInventory();
 	if (inv) {
-		std::vector<const InventoryList *> lists = inv->getLists();
-		for(std::vector<const InventoryList *>::const_iterator
-				i = lists.begin(); i != lists.end(); ++i) {
-			push_inventory_list(L, inv, (*i)->getName().c_str());
-			lua_setfield(L, -2, (*i)->getName().c_str());
-		}
+		push_inventory_lists(L, *inv);
+	} else {
+		lua_newtable(L);
 	}
 	lua_setfield(L, -2, "inventory");
 }