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How to Rotate byte programming in C

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Hi.

I need to rotate for an example x=0XFF for 3 to right.

I cant do that only with >> because that is shifting.
When you want rotate you need to "memory" all bit not to lose such as in case for shifting (i think).
So that is not the same.

Can I use this (x & 0xFF)>>3 ; for rotate ??
 

With a quick search on the web, we can find this opperation, also called as circular shift.
The following video shows an implementation.


At this website, there is an inline implementation for 32 bit variables:
Code: 
y = (x<<n) | (x>>(32-n));

I would dare to say that we could perhaps infer a more generic expression for any type ( not tested ! ):
Code: 
y = (x<<n) | (x>>(sizeof(x)-n));
 

O.K.

So may do like this

Code: 
(x>>3) | (x<<( (-3) & 0xFF ));
 

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