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On Sat, Feb 20, 2010 at 9:54 PM, Peter Smith <> wrote:
> Could someone please help me how to write a function in base Lua
> 5.1 to print out a userdata variable as a hex string?

As far as base Lua is concerned, userdata are opaque blobs which you
cannot do anything with - you can only store them, pass them to
functions, etc. To get the contents of a userdata, you need to use the
C functions designed specifically for that userdata, which in turn
employ the base C API function lua_touserdata to get memory access to
the userdata.