Re: C needs to evolve

From	Keith Thompson <kst-u@mib.org>
Newsgroups	comp.lang.c
Subject	Re: C needs to evolve
Date	2017-12-03 23:02 -0800
Organization	None to speak of
Message-ID	<lnwp23ugap.fsf@kst-u.example.com> (permalink)
References	(2 earlier) <QjxUB.105781$W61.83338@fx08.am4> <9be489e6-8c1e-4d5a-83f8-35960e6b28e3@googlegroups.com> <hJJUB.3826$lD5.167@fx39.iad> <p01gp3$2q1$1@dont-email.me> <37613bba-407c-431b-bdd7-d1832da0dd28@googlegroups.com>

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Felipe Ferreira <felipefsdev@gmail.com> writes:
> On Sunday, December 3, 2017 at 1:42:15 AM UTC-3, Keith Thompson wrote:
>> You snipped the part where I asked for specific examples of standard
>> library functions where types defined in <stdint.h> would work better
>> than the types currently used.  Do you have such examples?
>
> Like I said, it's about conformance. That's the whole advantage. The
> string library would benefit from that. If you are working with
> networking, you might be working with different architectures and
> knowing that that a int8_t/int16_t/int32_t in one is equal to a
> int8_t/int16_t/int32_t in the other will save a lot of pain knowing
> that the the functions that you used were specific for
> int8_t/int16_t/int32_t and will behave the same in both different
> architectures. You will know that certain data structure will have the
> same size, making sure that sending one through network and
> mem-copying on the other end will work.

How is it about conformance?  In a conforming implementation, strlen()
return a result of type size_t, which is the type used to represent
sizes.  It might be 16, 32, or 64 bits, or even some other size -- and
it's easy enough to find out which.  Exactly what change are you
suggesting?

Data structures are generally *not* binary-compatible across
architectures.  That's not just because of size, you also have to
consider alignment and endianness.

> On Saturday, December 2, 2017 at 11:56:21 PM UTC-3, Richard Damon wrote:
[...]
>> int16_t and int32_t might not exist, so really can't be used.
>
> True, but that would be a case of non conformance.

Not at all.  The intN_t types are optional (N1570 7.20.1.1p3).

[...].

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

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Re: C needs to evolve Chris Ahlstrom <OFeem1987@teleworm.us> - 2017-12-02 07:28 -0500
  Re: C needs to evolve bartc <bc@freeuk.com> - 2017-12-02 12:50 +0000
    Re: C needs to evolve Felipe Ferreira <felipefsdev@gmail.com> - 2017-12-02 06:26 -0800
      Re: C needs to evolve "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-12-02 08:31 -0800
      Re: C needs to evolve "Pascal J. Bourguignon" <pjb@informatimago.com> - 2017-12-02 17:36 +0100
      Re: C needs to evolve Keith Thompson <kst-u@mib.org> - 2017-12-02 15:40 -0800
        Re: C needs to evolve Felipe Ferreira <felipefsdev@gmail.com> - 2017-12-02 17:40 -0800
          Re: C needs to evolve Felipe Ferreira <felipefsdev@gmail.com> - 2017-12-02 17:46 -0800
            Re: C needs to evolve Ian Collins <ian-news@hotmail.com> - 2017-12-03 14:53 +1300
          Re: C needs to evolve Keith Thompson <kst-u@mib.org> - 2017-12-02 20:42 -0800
      Re: C needs to evolve Richard Damon <Richard@Damon-Family.org> - 2017-12-02 21:56 -0500
        Re: C needs to evolve David Brown <david.brown@hesbynett.no> - 2017-12-03 19:45 +0100
          Re: C needs to evolve Felipe Ferreira <felipefsdev@gmail.com> - 2017-12-03 11:35 -0800
            Re: C needs to evolve David Brown <david.brown@hesbynett.no> - 2017-12-03 21:58 +0100
            Re: C needs to evolve James Kuyper <jameskuyper@verizon.net> - 2017-12-03 21:01 -0500
            Re: C needs to evolve Keith Thompson <kst-u@mib.org> - 2017-12-03 23:02 -0800
          Re: C needs to evolve Thiago Adams <thiago.adams@gmail.com> - 2017-12-03 12:39 -0800
            Re: C needs to evolve David Brown <david.brown@hesbynett.no> - 2017-12-03 22:07 +0100
    Re: C needs to evolve Ian Collins <ian-news@hotmail.com> - 2017-12-03 11:34 +1300
    Re: C needs to evolve Melzzzzz <Melzzzzz@zzzzz.com> - 2017-12-03 05:25 +0000
      Re: C needs to evolve bartc <bc@freeuk.com> - 2017-12-03 12:37 +0000

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