+/*
+ Node metadata inventory callbacks
+*/
+
+// Return number of accepted items to be moved
+int scriptapi_nodemeta_inventory_allow_move(lua_State *L, v3s16 p,
+ const std::string &from_list, int from_index,
+ const std::string &to_list, int to_index,
+ int count, ServerActiveObject *player)
+{
+ realitycheck(L);
+ assert(lua_checkstack(L, 20));
+ StackUnroller stack_unroller(L);
+
+ INodeDefManager *ndef = get_server(L)->ndef();
+
+ // If node doesn't exist, we don't know what callback to call
+ MapNode node = get_env(L)->getMap().getNodeNoEx(p);
+ if(node.getContent() == CONTENT_IGNORE)
+ return 0;
+
+ // Push callback function on stack
+ if(!get_item_callback(L, ndef->get(node).name.c_str(),
+ "allow_metadata_inventory_move"))
+ return count;
+
+ // function(pos, from_list, from_index, to_list, to_index, count, player)
+ // pos
+ push_v3s16(L, p);
+ // from_list
+ lua_pushstring(L, from_list.c_str());
+ // from_index
+ lua_pushinteger(L, from_index + 1);
+ // to_list
+ lua_pushstring(L, to_list.c_str());
+ // to_index
+ lua_pushinteger(L, to_index + 1);
+ // count
+ lua_pushinteger(L, count);
+ // player
+ objectref_get_or_create(L, player);
+ if(lua_pcall(L, 7, 1, 0))
+ script_error(L, "error: %s", lua_tostring(L, -1));
+ if(!lua_isnumber(L, -1))
+ throw LuaError(L, "allow_metadata_inventory_move should return a number");
+ return luaL_checkinteger(L, -1);
+}
+
+// Return number of accepted items to be put
+int scriptapi_nodemeta_inventory_allow_put(lua_State *L, v3s16 p,
+ const std::string &listname, int index, ItemStack &stack,
+ ServerActiveObject *player)
+{
+ realitycheck(L);
+ assert(lua_checkstack(L, 20));
+ StackUnroller stack_unroller(L);
+
+ INodeDefManager *ndef = get_server(L)->ndef();
+
+ // If node doesn't exist, we don't know what callback to call
+ MapNode node = get_env(L)->getMap().getNodeNoEx(p);
+ if(node.getContent() == CONTENT_IGNORE)
+ return 0;
+
+ // Push callback function on stack
+ if(!get_item_callback(L, ndef->get(node).name.c_str(),
+ "allow_metadata_inventory_put"))
+ return stack.count;
+
+ // Call function(pos, listname, index, stack, player)
+ // pos
+ push_v3s16(L, p);
+ // listname
+ lua_pushstring(L, listname.c_str());
+ // index
+ lua_pushinteger(L, index + 1);
+ // stack
+ LuaItemStack::create(L, stack);
+ // player
+ objectref_get_or_create(L, player);
+ if(lua_pcall(L, 5, 1, 0))
+ script_error(L, "error: %s", lua_tostring(L, -1));
+ if(!lua_isnumber(L, -1))
+ throw LuaError(L, "allow_metadata_inventory_put should return a number");
+ return luaL_checkinteger(L, -1);
+}
+
+// Return number of accepted items to be taken
+int scriptapi_nodemeta_inventory_allow_take(lua_State *L, v3s16 p,
+ const std::string &listname, int index, ItemStack &stack,
+ ServerActiveObject *player)
+{
+ realitycheck(L);
+ assert(lua_checkstack(L, 20));
+ StackUnroller stack_unroller(L);
+
+ INodeDefManager *ndef = get_server(L)->ndef();
+
+ // If node doesn't exist, we don't know what callback to call
+ MapNode node = get_env(L)->getMap().getNodeNoEx(p);
+ if(node.getContent() == CONTENT_IGNORE)
+ return 0;
+
+ // Push callback function on stack
+ if(!get_item_callback(L, ndef->get(node).name.c_str(),
+ "allow_metadata_inventory_take"))
+ return stack.count;
+
+ // Call function(pos, listname, index, count, player)
+ // pos
+ push_v3s16(L, p);
+ // listname
+ lua_pushstring(L, listname.c_str());
+ // index
+ lua_pushinteger(L, index + 1);
+ // stack
+ LuaItemStack::create(L, stack);
+ // player
+ objectref_get_or_create(L, player);
+ if(lua_pcall(L, 5, 1, 0))
+ script_error(L, "error: %s", lua_tostring(L, -1));
+ if(!lua_isnumber(L, -1))
+ throw LuaError(L, "allow_metadata_inventory_take should return a number");
+ return luaL_checkinteger(L, -1);
+}
+
+// Report moved items
+void scriptapi_nodemeta_inventory_on_move(lua_State *L, v3s16 p,