How to print longs from Lua?

[Beth <beth.tridium () gmail com>]

I'm writing a Lua post-dissector, where I wish to print MAC addresses
(64-bit ints) to a Lua text window.  I can't seem to get it to work.

The best I can do so far is  "tostring(mac_addr)"  which prints the decimal
equivalent of the lower 32 bits of the address.  What I would like is to
print all 64 bits in hex.  I know that the "l" modifier normally used in
printf/scanf etc (e.g. %lx) is not supported in Lua, so how do I print out
this value?

If there is no way to print all 64 bits, then is there a way to split the
value into upper and lower halves so that I can print each separately?

Thanks very much,
Beth

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