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Re: Representing signed values in corresponding unsigned types

From cross@spitfire.i.gajendra.net (Dan Cross)
Newsgroups comp.lang.c
Subject Re: Representing signed values in corresponding unsigned types
Date 2026-06-29 12:13 +0000
Organization PANIX Public Access Internet and UNIX, NYC
Message-ID <111tngq$ned$1@reader1.panix.com> (permalink)
References <111qs0g$3hdko$1@dont-email.me> <86zf0e7ox4.fsf@linuxsc.com> <111shlo$3vq40$2@kst.eternal-september.org>

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In article <111shlo$3vq40$2@kst.eternal-september.org>,
Keith Thompson  <Keith.S.Thompson+u@gmail.com> wrote:
>Tim Rentsch <tr.17687@z991.linuxsc.com> writes:
>> NS <ns@2b.here> writes:
>>> Can all the values of a signed int be represented in an unsigned
>>> int (or signed long in an unsigned long, etc.)?
>
>Obviously not.  Negative values cannot be represented in unsigned types.
>But I don't think that's what NS meant.

Agreed.  I believe NS's question could be rephrased as, "does
the standard guarantee that there is an injection from values of
type signed int to values of unsigned int?"

	- Dan C.

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Representing signed values in corresponding unsigned types NS <ns@2b.here> - 2026-06-28 10:11 +0000
  Re: Representing signed values in corresponding unsigned types ram@zedat.fu-berlin.de (Stefan Ram) - 2026-06-28 12:07 +0000
  Re: Representing signed values in corresponding unsigned types Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-06-28 06:52 -0700
    Re: Representing signed values in corresponding unsigned types Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-28 18:27 -0700
      Re: Representing signed values in corresponding unsigned types cross@spitfire.i.gajendra.net (Dan Cross) - 2026-06-29 12:13 +0000
      Re: Representing signed values in corresponding unsigned types Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-08-15 02:19 -0700
        Re: Representing signed values in corresponding unsigned types Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-08-15 05:48 -0700
  Re: Representing signed values in corresponding unsigned types James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-06-28 22:23 -0400
    Re: Representing signed values in corresponding unsigned types Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-28 20:24 -0700

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