Re: portable way to get highest bit set?

Ben Bacarisse <[email protected]> Wed, 11 Oct 2023 13:56:10 +0100

Newsgroups	comp.lang.c,alt.comp.lang.c
Organization	A noiseless patient Spider
Message-ID	<[email protected]>

candycanearter07 <[email protected]> writes:

> What is the best/most portable way to get the highest bit set?
>
> ie. 011010001
> to  010000000

While bit twiddling solutions will be needed for some years, it's worth
noting that C23 has <stdbit.h> which includes functions (including
type-generic ones) like stdc_bit_floor.  C++ has had something similar
since C++20.

-- 
Ben.