Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.c > #271378

Re: portable way to get highest bit set?

Path csiph.com!news.mixmin.net!eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups comp.lang.c
Subject Re: portable way to get highest bit set?
Date Sat, 14 Oct 2023 19:05:05 -0700
Organization A noiseless patient Spider
Lines 11
Message-ID <86cyxgabe6.fsf@linuxsc.com> (permalink)
References <ug5gvh$1jkar$3@dont-email.me> <ug70cu$219ov$1@dont-email.me> <878r884vi5.fsf@bsb.me.uk> <ug86d3$2c9mp$1@dont-email.me> <87edi0qide.fsf@bsb.me.uk> <ug8r5q$2gqj4$1@dont-email.me> <ug9p1o$2nihu$1@dont-email.me>
MIME-Version 1.0
Content-Type text/plain; charset=us-ascii
Injection-Info dont-email.me; posting-host="eb478ed0db5b06d993c3ccd040701c7e"; logging-data="311420"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/9btcAi9th22k+hXulnB6KblY2hca8crc="
User-Agent Gnus/5.11 (Gnus v5.11) Emacs/22.4 (gnu/linux)
Cancel-Lock sha1:6xxNV4o9QnyVB9Rtu1ItzcsqeUQ= sha1:RxYQiGRRrXTlyqMDYLekbx0nPJU=
Xref csiph.com comp.lang.c:271378

Show key headers only | View raw


jak <nospam@please.ty> writes:

> unsigned long h_bit(unsigned long val)
> {
>     int i;
>     for(i = 0; val > 1; val /= 2, i++);
>     return val << i;
> }

A nice compact solution.  I like the way it
naturally deals with the case when val is zero.

Back to comp.lang.c | Previous | NextNext in thread | Find similar | Unroll thread


Thread

Re: portable way to get highest bit set? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-10-14 19:05 -0700
  Re: portable way to get highest bit set? jak <nospam@please.ty> - 2023-10-15 06:00 +0200
    Re: portable way to get highest bit set? jak <nospam@please.ty> - 2023-10-15 07:03 +0200
      Re: portable way to get highest bit set? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-10-15 01:35 -0700
        Re: portable way to get highest bit set? jak <nospam@please.ty> - 2023-10-15 18:05 +0200

csiph-web