Re: Bit ops (why functions are non optimal)

[Rici Lake <lua@...>]

On 22-Sep-06, at 1:11 PM, Mike Panetta wrote:

> My reply to this email:  
> http://lua-users.org/lists/lua-l/2006-09/msg00796.html
>
>  Sorry I had to start a new thread, but I can no longer send or 
> recieve messages from the list on my work address for some reason.
>
>  People in the list keep brining up networking as the reason, 
> allthough by far this is not the only reaon to use bitops, but I guess 
> its the one most people are familiar with so I will use them here 
> too.  Lets take an application that already exists, ipcalc for 
> example, and take a simple example from it where bit operations are 
> use to manipulate ip addresses. (cutting code from the source)

IP addresses are a typical case of why bitwise ops limited to k bits 
(where k is some unknown number < 64) are a bad idea.

What happens when you start upgrading that code to IPv6? 128-bit 
addresses, hmmm :)

R.