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| From | Ken Brody <kenbrody@spamcop.net> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: sizeof Data types |
| Date | 2016-08-11 11:53 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <noi722$l76$1@dont-email.me> (permalink) |
| References | (1 earlier) <de7129d4-a523-4a52-b153-56d61f302927@googlegroups.com> <nod2mm$ubb$2@dont-email.me> <a5eaf090-9173-bc16-f15a-0720a10fd5cc@verizon.net> <nofiho$k6f$1@dont-email.me> <cb9389f0-2841-a429-e653-9cac27bc8e8a@verizon.net> |
On 8/10/2016 12:35 PM, James R. Kuyper wrote:
> On 08/10/2016 11:51 AM, Ken Brody wrote:
>> On 8/9/2016 1:41 PM, James R. Kuyper wrote:
[...]
>>> #include <stdint.h>
>>> #ifndef INT16_MAX
>>> #error int16_t is not supported
>>> #endif
>>
>> Ah... Obvious when you think about it.
>>
>> Section 7.18.2 (n1124).
>
> A key point, which I should have mentioned, is that the C standard says "For
> each type described herein that the implementation provides,261) <stdint.h>
> shall declare that typedef name and define the associated macros.
> Conversely, for each type described herein that the implementation does not
> provide, <stdint.h> shall not declare that typedef name nor shall it define
> the associated macros." (7.20p4 - n1570). If it weren't for the "shall not"
> clause, this test wouldn't be reliable.
It should be obvious that, if an implementation doesn't include an X-bit
integer, there shouldn't be an INTx_MAX define for it. ("We don't supply a
64-bit integer, but if we did, it's max value would have been...") But,
it's good that the Standard specifically says "shall not".
--
Kenneth Brody
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sizeof Data types Real Troll <real.troll@trolls.com> - 2016-08-05 18:45 -0400
sizeof Data types jameskuyper@verizon.net - 2016-08-05 17:10 -0700
Re: sizeof Data types raltbos@xs4all.nl (Richard Bos) - 2016-08-06 10:35 +0000
Re: sizeof Data types raltbos@xs4all.nl (Richard Bos) - 2016-08-06 10:36 +0000
Re: sizeof Data types Jean-Marc Bourguet <jm@bourguet.org> - 2016-08-06 22:29 +0200
Re: sizeof Data types Ken Brody <kenbrody@spamcop.net> - 2016-08-09 12:55 -0400
Re: sizeof Data types BartC <bc@freeuk.com> - 2016-08-06 21:43 +0100
Re: sizeof Data types jameskuyper@verizon.net - 2016-08-06 15:25 -0700
Re: sizeof Data types David Brown <david.brown@hesbynett.no> - 2016-08-08 09:48 +0200
Re: sizeof Data types James Kuyper <jameskuyper@verizon.net> - 2016-08-08 11:05 -0400
Re: sizeof Data types David Brown <david.brown@hesbynett.no> - 2016-08-08 17:57 +0200
Re: sizeof Data types supercat@casperkitty.com - 2016-08-08 08:36 -0700
Re: sizeof Data types David Brown <david.brown@hesbynett.no> - 2016-08-08 19:05 +0200
Re: sizeof Data types supercat@casperkitty.com - 2016-08-08 14:09 -0700
Re: sizeof Data types David Brown <david.brown@hesbynett.no> - 2016-08-09 09:38 +0200
Re: sizeof Data types Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-08-09 11:23 +0100
Re: sizeof Data types Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-12 07:42 -0700
Re: sizeof Data types Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-08-12 21:38 +0100
Re: sizeof Data types Keith Thompson <kst-u@mib.org> - 2016-08-09 08:12 -0700
Re: sizeof Data types supercat@casperkitty.com - 2016-08-10 10:36 -0700
Re: sizeof Data types Keith Thompson <kst-u@mib.org> - 2016-08-10 11:42 -0700
Re: sizeof Data types Philip Lantz <prl@canterey.us> - 2016-08-11 10:20 -0700
Re: sizeof Data types Keith Thompson <kst-u@mib.org> - 2016-08-11 12:04 -0700
Re: sizeof Data types Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-12 08:22 -0700
Re: sizeof Data types Nobody <nobody@nowhere.invalid> - 2016-08-07 01:32 +0100
Re: sizeof Data types Keith Thompson <kst-u@mib.org> - 2016-08-06 18:10 -0700
Re: sizeof Data types Siri Cruise <chine.bleu@yahoo.com> - 2016-08-06 20:22 -0700
Re: sizeof Data types Ian Collins <ian-news@hotmail.com> - 2016-08-07 15:40 +1200
Re: sizeof Data types Ken Brody <kenbrody@spamcop.net> - 2016-08-09 13:06 -0400
Re: sizeof Data types Siri Cruise <chine.bleu@yahoo.com> - 2016-08-09 12:37 -0700
Re: sizeof Data types Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-11 09:18 -0700
Re: sizeof Data types Siri Cruise <chine.bleu@yahoo.com> - 2016-08-11 11:11 -0700
Re: sizeof Data types Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2016-08-11 12:26 -0600
Re: sizeof Data types David Brown <david.brown@hesbynett.no> - 2016-08-11 23:31 +0200
Re: sizeof Data types supercat@casperkitty.com - 2016-08-11 14:59 -0700
Re: sizeof Data types Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-08-12 00:15 -0700
Re: sizeof Data types Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-12 08:05 -0700
Re: sizeof Data types John Bode <jfbode1029@gmail.com> - 2016-08-08 12:38 -0700
Re: sizeof Data types Ken Brody <kenbrody@spamcop.net> - 2016-08-09 13:08 -0400
Re: sizeof Data types Keith Thompson <kst-u@mib.org> - 2016-08-09 10:43 -0700
Re: sizeof Data types "James R. Kuyper" <jameskuyper@verizon.net> - 2016-08-09 13:41 -0400
Re: sizeof Data types Ken Brody <kenbrody@spamcop.net> - 2016-08-10 11:51 -0400
Re: sizeof Data types "James R. Kuyper" <jameskuyper@verizon.net> - 2016-08-10 12:35 -0400
Re: sizeof Data types Ken Brody <kenbrody@spamcop.net> - 2016-08-11 11:53 -0400
Re: sizeof Data types "James R. Kuyper" <jameskuyper@verizon.net> - 2016-08-13 11:29 -0400
Re: sizeof Data types supercat@casperkitty.com - 2016-08-13 09:18 -0700
Re: sizeof Data types Keith Thompson <kst-u@mib.org> - 2016-08-10 10:13 -0700
Re: sizeof Data types Ken Brody <kenbrody@spamcop.net> - 2016-08-11 11:56 -0400
Re: sizeof Data types Ken Brody <kenbrody@spamcop.net> - 2016-08-09 12:59 -0400
Re: sizeof Data types "James R. Kuyper" <jameskuyper@verizon.net> - 2016-08-09 13:49 -0400
Re: sizeof Data types Ken Brody <kenbrody@spamcop.net> - 2016-08-10 12:08 -0400
Re: sizeof Data types Keith Thompson <kst-u@mib.org> - 2016-08-09 11:35 -0700
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