Wireshark-dev: Re: [Wireshark-dev] Lua dissector: How to set sub-field bit widths using prefere
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From: "Maynard, Chris" <Christopher.Maynard@xxxxxxx>
Date: Thu, 6 Sep 2018 12:23:12 +0000
Small correction.

> -----Original Message-----
> > 2) What does this line do?
> >
> > table.insert(t, (bit.band(bit.rshift(val, i), 1) == 1 and '1') or '0')
> 
> This shifts val right i number of bits, where i is a value between 16 and 1, and
> then tests that bit to see if it's set or not.  If it is set, it inserts a '1' into the table
> t; otherwise it inserts a '0' into the table t.

This should read:
This shifts val right i number of bits, where i is a value between 15 and 0, and
then tests that bit to see if it's set or not.  If it is set, it inserts a '1' into the table
t; otherwise it inserts a '0' into the table t.

- Chris








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