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On Sat, Feb 20, 2010 at 11:58 PM, Peter Cawley <> wrote:
> 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.

An interesting possibility is a small C extension which can work with
arbitrary userdata as memory buffers, rather like how Alien works with
buffers.  One could define a userdata-to-string converter, bearing in
mind that Lua strings can contain embedded nuls and then use one of
the struct, pack, etc libraries to decode that string.