Reading all globals

["Martin Swaine" <martin.swaine@...>]

How can I read out all the global variable names and their values with
the C API?

I understand lua_getglobals puts them onto the stack as a table and then
lua_gettable can be used to get the value of a named key, but I don't
know in advance the keys(variable names) that are being used.

Many thanks
Martin