|
private lua_isuserdata ( |
||
| luaState | ||
| stackPos | int | |
| return | int | |
public bool LuaIsUserData(int index)
{
return(LuaDLL.lua_isuserdata(L, index) != 0);
}
//L: [namespace Table]
public bool AddObject(IntPtr L, System.Object obj, string metatable /* nullable */)
{
IntPtr userdata = IntPtr.Zero;
if (luaObjs.TryGetValue(obj, out userdata))
{
LuaDLL.lua_rawgeti(L, LuaDLL.LUA_REGISTRYINDEX, weakRefForUserData); //namespace,reftable
LuaDLL.lua_pushlightuserdata(L, userdata); //namespace,reftable,userdataKey
LuaDLL.lua_rawget(L, -2); //namespace,reftable,userdata
LuaDLL.lua_remove(L, -2); //namespace,userdata
if (LuaDLL.lua_isuserdata(L, -1))
{
return(true);
}
else
{
LuaDLL.lua_pop(L, 1); //namespace
}
}
userdata = LuaDLL.lua_newuserdata(L, 1); //namespace,obj
if (metatable == null)
{
Type type = obj.GetType();
while (type != null)
{
LuaDLL.wlua_getfield(L, -2, type.Name); //namespace,obj,typet
if (LuaDLL.lua_isnil(L, -1))
{
LuaDLL.lua_pop(L, 1); //namespace,obj
type = type.BaseType;
continue;
}
if (LuaDLL.lua_istable(L, -1))
{
metatable = type.Name;
break;
}
else
{
LuaDLL.lua_pop(L, 2); //namespace
throw new LuaException(L, "metatable must be a table:" + type.Name);
}
}
}
else
{
LuaDLL.wlua_getfield(L, -2, metatable); //namespace,obj,typet
if (LuaDLL.lua_isnil(L, -1))
{
LuaDLL.lua_pop(L, 2); //namespace
throw new LuaException(L, "failed to find metatable:" + metatable);
}
}
//namespace,obj,typet
LuaDLL.lua_setmetatable(L, -2); //namespace,obj
objs[userdata.ToInt64()] = obj;
luaObjs[obj] = userdata;
LuaDLL.lua_rawgeti(L, LuaDLL.LUA_REGISTRYINDEX, weakRefForUserData); //namespace,obj,reftable
LuaDLL.lua_pushlightuserdata(L, userdata); //namespace,obj,reftable,userdatakey
LuaDLL.lua_pushvalue(L, -3); //namespace,obj,reftable,userdatakey,obj
LuaDLL.lua_rawset(L, -3); //namespace,obj,reftable
LuaDLL.lua_pop(L, 1); //namespace,obj
return(true);
}