From: James Britt <james_b@...>
Date: 2005-06-08T23:31:46+09:00
Subject: Re: Ruby version ot TEA (Tiny Encryption Alogrithm)?

Max Nickel wrote:
>>Related question: The JavaScript version uses a shift right, zero fill 
>>operation.  Ruby seems to only offer signed shift-right.  Is this the 
>>case?   Is there a Ruby version of shift right, zero fill someplace?
> 
> 
> AFAIK Ruby only supports arithmetic, not logical right shift. But
> logical right shift is quite easy to implement. Just shift the number of
> bits and then mask the same number of the "front" bits.
> For example, if you have a 32-Bit long number and want to shift one bit
> & fill with zero you could do
> i = (i >> 1) & 0x7FFFFFFF

Ah.  Yes.
Thanks!


James