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

Groups > comp.lang.c > #75779

Re: memset extensions

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: memset extensions
Date 2015-11-11 17:22 +0000
Organization A noiseless patient Spider
Message-ID <87lha4ladh.fsf@bsb.me.uk> (permalink)
References <n1v3pk$967$1@dont-email.me> <n1vctl$jg8$1@solani.org> <n1vqhm$u0o$2@dont-email.me>

Show all headers | View raw

jacobnavia <jacob@jacob.remcomp.fr> writes:

> Le 11/11/2015 13:39, Philipp Klaus Krause a écrit :
>> On 11.11.2015 11:05, jacobnavia wrote:
>>> void *memset(void *srcPtr,unsigned char value,size_t size);
>>>
>>> I want to add extensions to it:
>>>
>>> void memset16( void *srcPtr, int16_t  value, size_t size);
>>> void memset32( void *srcPtr, int32_t  value, size_t size);
>>> void memset64( void *srcPtr, int64_t  value, size_t size);
>>> void memset128(void *srcPtr, int128_t value, size_t size);
<snip>
>> Why only for signed values? Why not use _Generic?
>
> _Generic can't be used since
>
> 'A' --> integer
> 120 --> integer also
>
> You would never get a value less than int since all others are
> promoted automatically

That's not true.  The controlling expression of _Generic does not
undergo promotion.

What's more, if you make the first parameter type-specific
(i.e. ditching void * and using int16_t * and so on) you could use
_Generic on that (in a macro) to avoid the problem caused by 'A' being
of type int.

-- 
Ben.

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

Thread

memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 11:05 +0100
  Re: memset extensions Lőrinczy Zsigmond <zsiga@nospam.for.me> - 2015-11-11 11:08 +0100
    Re: memset extensions "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-11 04:56 -0800
  Re: memset extensions Philipp Klaus Krause <pkk@spth.de> - 2015-11-11 13:39 +0100
    Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 17:34 +0100
      Re: memset extensions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-11 17:22 +0000
        Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 21:19 +0100
          Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 12:51 -0800
          Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 16:01 -0500
            Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 22:03 +0100
              Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 13:19 -0800
                Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 22:45 +0100
                Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 16:51 -0500
                Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 23:01 +0100
                Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 17:29 -0500
                Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 23:36 +0100
                Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 15:00 -0800
              Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 16:48 -0500
          Re: memset extensions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-11 22:15 +0000
  Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 08:05 -0500
  Re: memset extensions Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-11 08:31 -0500
    Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 17:34 +0100
  Re: memset extensions Les Cargill <lcargill99@comcast.com> - 2015-11-11 08:30 -0600
    Re: memset extensions Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-11 09:48 -0500
    Re: memset extensions gwowen <gwowen@gmail.com> - 2015-11-11 07:55 -0800
    Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 11:24 -0500
    Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 17:32 +0100
      Re: memset extensions Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-11 11:44 -0500
      Re: memset extensions raltbos@xs4all.nl (Richard Bos) - 2015-11-17 22:53 +0000
        Re: memset extensions supercat@casperkitty.com - 2015-11-17 15:37 -0800
          Re: memset extensions raltbos@xs4all.nl (Richard Bos) - 2015-11-20 11:27 +0000
            Re: memset extensions supercat@casperkitty.com - 2015-11-20 08:45 -0800
  Re: memset extensions supercat@casperkitty.com - 2015-11-11 08:25 -0800
  Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 09:09 -0800
    Re: memset extensions supercat@casperkitty.com - 2015-11-11 09:18 -0800
      Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 10:57 -0800
    Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 21:17 +0100

csiph-web