1 files changed, 58 insertions, 0 deletions
diff --git a/LuaThis.h b/LuaThis.h
new file mode 100644
index 0000000..ac9712f
--- /dev/null
+++ b/LuaThis.h
@@ -0,0 +1,58 @@
+// ---------------------------------------------------------------------------
+// FILE NAME            : LuaThis.h
+// ---------------------------------------------------------------------------
+// DESCRIPTION :
+//
+// Controls the "this" table
+// 
+// ---------------------------------------------------------------------------
+// VERSION              : 1.01
+// DATE                 : 1-Sep-2005
+// AUTHOR               : Richard Shephard
+// ---------------------------------------------------------------------------
+// LIBRARY INCLUDE FILES
+#ifndef __LUA_THIS_H__
+#define __LUA_THIS_H__
+
+#include "luainc.h"
+#include "luavirtualmachine.h"
+
+// Sets the "this" global table that scripts use
+
+class CLuaThis
+{
+public:
+   CLuaThis (CLuaVirtualMachine& vm, int iRef) : m_iOldRef (0), m_vm (vm)
+   {
+      lua_State *state = (lua_State *) vm;
+      if (vm.Ok ())
+      {
+         // Save the old "this" table
+         lua_getglobal (state, "this");
+         m_iOldRef = luaL_ref (state, LUA_REGISTRYINDEX);
+
+         // replace it with our new one
+         lua_rawgeti(state, LUA_REGISTRYINDEX, iRef);
+         lua_setglobal (state, "this");
+      }
+   }
+
+   virtual ~CLuaThis (void)
+   {
+      lua_State *state = (lua_State *) m_vm;
+      if (m_iOldRef > 0 && m_vm.Ok ())
+      {
+         // Replace the old "this" table
+         lua_rawgeti(state, LUA_REGISTRYINDEX, m_iOldRef);
+         lua_setglobal (state, "this");
+         luaL_unref (state, LUA_REGISTRYINDEX, m_iOldRef);
+      }
+   }
+
+
+protected:
+   int m_iOldRef;
+   CLuaVirtualMachine& m_vm;
+};
+
+#endif // __LUA_THIS_H__
+\ No newline at end of file