Add LuaState class

src/LuaState.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include "lua.hpp"
+#include <iostream>
+
+namespace crown
+{
+class LuaState
+{
+public:
+
+		LuaState()
+		{
+			m_state = luaL_newstate();
+			luaL_openlibs(m_state);
+		}
+
+		~LuaState()
+		{
+			lua_close(m_state);
+		}
+
+		lua_State* state()
+		{
+			return m_state;
+		}
+
+		int load_program(const char* src)
+		{
+			return luaL_loadfile(m_state, src);
+		}
+
+private:
+
+	lua_State* m_state;
+
+};
+
+static int execute_program(lua_State* state)
+{
+	return lua_pcall(state, 0, LUA_MULTRET, 0);
+}
+
+static void report_errors(lua_State* state, const int status)
+{
+	if (status != 0)
+	{
+		std::cerr << "-- " << lua_tostring(state, -1) << std::endl;
+
+		lua_pop(state, 1);
+	}
+}
+
+} // namespace crown