Re: May a string span multiple, independent objects?

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From	Hans-Bernhard Bröker <HBBroeker@gmail.com>
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Subject	Re: May a string span multiple, independent objects?
Date	Wed, 3 Jul 2024 17:23:24 +0200
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Am 03.07.2024 um 16:31 schrieb Vincent Lefevre:
> ISO C17 (and C23 draft) 7.1.1 defines a string as follows: "A string
> is a contiguous sequence of characters terminated by and including
> the first null character."
> 
> But may a string span multiple, independent objects that happens
> to be contiguous in memory?
> 
> For instance, is the following program valid and what does the ISO C
> standard say about that?

Comparing pointers pointing at distinct objects is already invalid (for 
some interpretation of "invalid"), so: no.  Yes, that means the 
implementation of a function like memmove() cannot be fully portable C.

A program whose correctness relies on things "happening to be" just like 
so cannot possibly be entirely valid.

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Thread

May a string span multiple, independent objects? Vincent Lefevre <vincent-news@vinc17.net> - 2024-07-03 14:31 +0000
  Re: May a string span multiple, independent objects? Hans-Bernhard Bröker <HBBroeker@gmail.com> - 2024-07-03 17:23 +0200
    Re: May a string span multiple, independent objects? Vincent Lefevre <vincent-news@vinc17.net> - 2024-07-03 15:37 +0000
    Re: May a string span multiple, independent objects? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-07-03 12:11 -0400
    Re: May a string span multiple, independent objects? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-08-08 08:51 -0700
  Re: May a string span multiple, independent objects? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-07-03 11:59 -0400
    Re: May a string span multiple, independent objects? Ben Bacarisse <ben@bsb.me.uk> - 2024-07-03 22:08 +0100
      Re: May a string span multiple, independent objects? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-07-03 17:36 -0400
      Re: May a string span multiple, independent objects? Vincent Lefevre <vincent-news@vinc17.net> - 2024-07-04 13:22 +0000
        Re: May a string span multiple, independent objects? Ben Bacarisse <ben@bsb.me.uk> - 2024-07-05 05:14 +0100
        Re: May a string span multiple, independent objects? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-07-05 01:37 -0400
        Re: May a string span multiple, independent objects? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-08-08 08:35 -0700
  Re: May a string span multiple, independent objects? Kaz Kylheku <643-408-1753@kylheku.com> - 2024-07-05 07:14 +0000

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