1 files changed, 52 insertions, 4 deletions

diff --git a/src/script/lua_api/l_item.cpp b/src/script/lua_api/l_item.cpp
index 794d8a6e5..13d046d00 100644
--- a/src/script/lua_api/l_item.cpp
+++ b/src/script/lua_api/l_item.cpp
@@ -22,6 +22,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "lua_api/l_internal.h"
 #include "common/c_converter.h"
 #include "common/c_content.h"
+#include "common/c_packer.h"
 #include "itemdef.h"
 #include "nodedef.h"
 #include "server.h"
@@ -342,7 +343,7 @@ int LuaItemStack::l_get_tool_capabilities(lua_State *L)
 }
 
 // add_wear(self, amount) -> true/false
-// The range for "amount" is [0,65535]. Wear is only added if the item
+// The range for "amount" is [0,65536]. Wear is only added if the item
 // is a tool. Adding wear might destroy the item.
 // Returns true if the item is (or was) a tool.
 int LuaItemStack::l_add_wear(lua_State *L)
@@ -356,6 +357,25 @@ int LuaItemStack::l_add_wear(lua_State *L)
 	return 1;
 }
 
+// add_wear_by_uses(self, max_uses) -> true/false
+// The range for "max_uses" is [0,65536].
+// Adds wear to the item in such a way that, if
+// only this function is called to add wear, the item
+// will be destroyed exactly after `max_uses` times of calling it.
+// No-op if `max_uses` is 0 or item is not a tool.
+// Returns true if the item is (or was) a tool.
+int LuaItemStack::l_add_wear_by_uses(lua_State *L)
+{
+	NO_MAP_LOCK_REQUIRED;
+	LuaItemStack *o = checkobject(L, 1);
+	ItemStack &item = o->m_stack;
+	u32 max_uses = readParam<int>(L, 2);
+	u32 add_wear = calculateResultWear(max_uses, item.wear);
+	bool result = item.addWear(add_wear, getGameDef(L)->idef());
+	lua_pushboolean(L, result);
+	return 1;
+}
+
 // add_item(self, itemstack or itemstring or table or nil) -> itemstack
 // Returns leftover item stack
 int LuaItemStack::l_add_item(lua_State *L)
@@ -441,6 +461,7 @@ int LuaItemStack::create_object(lua_State *L)
 	lua_setmetatable(L, -2);
 	return 1;
 }
+
 // Not callable from Lua
 int LuaItemStack::create(lua_State *L, const ItemStack &item)
 {
@@ -457,6 +478,20 @@ LuaItemStack *LuaItemStack::checkobject(lua_State *L, int narg)
 	return *(LuaItemStack **)luaL_checkudata(L, narg, className);
 }
 
+void *LuaItemStack::packIn(lua_State *L, int idx)
+{
+	LuaItemStack *o = checkobject(L, idx);
+	return new ItemStack(o->getItem());
+}
+
+void LuaItemStack::packOut(lua_State *L, void *ptr)
+{
+	ItemStack *stack = reinterpret_cast<ItemStack*>(ptr);
+	if (L)
+		create(L, *stack);
+	delete stack;
+}
+
 void LuaItemStack::Register(lua_State *L)
 {
 	lua_newtable(L);
@@ -488,6 +523,8 @@ void LuaItemStack::Register(lua_State *L)
 
 	// Can be created from Lua (ItemStack(itemstack or itemstring or table or nil))
 	lua_register(L, className, create_object);
+
+	script_register_packer(L, className, packIn, packOut);
 }
 
 const char LuaItemStack::className[] = "ItemStack";
@@ -514,6 +551,7 @@ const luaL_Reg LuaItemStack::methods[] = {
 	luamethod(LuaItemStack, get_definition),
 	luamethod(LuaItemStack, get_tool_capabilities),
 	luamethod(LuaItemStack, add_wear),
+	luamethod(LuaItemStack, add_wear_by_uses),
 	luamethod(LuaItemStack, add_item),
 	luamethod(LuaItemStack, item_fits),
 	luamethod(LuaItemStack, take_item),
@@ -576,6 +614,9 @@ int ModApiItemMod::l_register_item_raw(lua_State *L)
 		// be done
 		if (f.name == "ignore")
 			return 0;
+		// This would break everything
+		if (f.name.empty())
+			throw LuaError("Cannot register node with empty name");
 
 		content_t id = ndef->set(f.name, f);
 
@@ -632,8 +673,8 @@ int ModApiItemMod::l_get_content_id(lua_State *L)
 	NO_MAP_LOCK_REQUIRED;
 	std::string name = luaL_checkstring(L, 1);
 
-	const IItemDefManager *idef = getGameDef(L)->getItemDefManager();
-	const NodeDefManager *ndef = getGameDef(L)->getNodeDefManager();
+	const IItemDefManager *idef = getGameDef(L)->idef();
+	const NodeDefManager *ndef = getGameDef(L)->ndef();
 
 	// If this is called at mod load time, NodeDefManager isn't aware of
 	// aliases yet, so we need to handle them manually
@@ -658,7 +699,7 @@ int ModApiItemMod::l_get_name_from_content_id(lua_State *L)
 	NO_MAP_LOCK_REQUIRED;
 	content_t c = luaL_checkint(L, 1);
 
-	const NodeDefManager *ndef = getGameDef(L)->getNodeDefManager();
+	const NodeDefManager *ndef = getGameDef(L)->ndef();
 	const char *name = ndef->get(c).name.c_str();
 
 	lua_pushstring(L, name);
@@ -673,3 +714,10 @@ void ModApiItemMod::Initialize(lua_State *L, int top)
 	API_FCT(get_content_id);
 	API_FCT(get_name_from_content_id);
 }
+
+void ModApiItemMod::InitializeAsync(lua_State *L, int top)
+{
+	// all read-only functions
+	API_FCT(get_content_id);
+	API_FCT(get_name_from_content_id);
+}