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Groups > comp.lang.c > #70132

Re: just curious:Equel

From August Karlstrom <fusionfile@gmail.com>
Newsgroups comp.lang.c
Subject Re: just curious:Equel
Date 2015-09-10 10:21 +0200
Organization Aioe.org NNTP Server
Message-ID <msrehd$d8j$1@speranza.aioe.org> (permalink)
References (9 earlier) <kfnh9n7tj7y.fsf@x-alumni2.alumni.caltech.edu> <msjjha$sgr$1@speranza.aioe.org> <kfnfv2pmocv.fsf@x-alumni2.alumni.caltech.edu> <msm6jq$qj8$1@speranza.aioe.org> <kfnlhcfld75.fsf@x-alumni2.alumni.caltech.edu>

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On 2015-09-09 19:22, Tim Rentsch wrote:
> August Karlstrom <fusionfile@gmail.com> writes:
>> #define LEN(arr) (sizeof (arr) / sizeof (arr)[0])
>>
>> #define NEW_ARRAY(ptr, n) (ptr) = malloc((n) * sizeof *(ptr))
>>
>> #define NEW(ptr) NEW_ARRAY((ptr), 1)
>
> I agree on the macros, although I would advocate different choices
> for the names.  I've settled on LIMIT() for what you call LEN().  (As
> a rule I avoided shortened words like "len" and "ptr" - if a word is
> meant, better to use the whole word.)

It's always a question of striking a balance between identifier 
comprehension and expression/statement comprehension.

The *length* of an array is a well established concept. On the other 
hand I'm not familiar with the *limit* of an array. If I saw your LIMIT 
function I wouldn't know if it was the index of the last element or the 
length of an array.

> Incidentally, you probably know this, but these NEW's can be used as
> parts of declarations:
>
> int *NEW( stuff, 20 );

Or "misused", depending on how you see it. ;-)


-- August

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just curious:Equel G G <gdotone@gmail.com> - 2015-09-01 22:37 -0700
  Re: just curious:Equel James Kuyper <jameskuyper@verizon.net> - 2015-09-02 09:56 -0400
    Re: just curious:Equel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-09-02 16:03 +0100
      Re: just curious:Equel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-09-02 08:12 -0700
        Re: just curious:Equel gordonb.d8f7l@burditt.org (Gordon Burditt) - 2015-09-02 11:09 -0500
        Re: just curious:Equel Richard Heathfield <rjh@cpax.org.uk> - 2015-09-02 17:27 +0100
          Re: just curious:Equel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-09-02 09:36 -0700
            Re: just curious:Equel Richard Heathfield <rjh@cpax.org.uk> - 2015-09-02 17:57 +0100
              Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-02 22:34 +0200
                Re: just curious:Equel Richard Heathfield <rjh@cpax.org.uk> - 2015-09-02 21:48 +0100
                Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-03 09:31 +0200
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-06 13:29 -0700
                Re: just curious:Equel James Kuyper <jameskuyper@verizon.net> - 2015-09-02 17:09 -0400
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-06 13:33 -0700
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-06 12:56 -0700
                Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-07 10:57 +0200
                Re: just curious:Equel Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-09-07 19:29 +0000
                Re: just curious:Equel James Kuyper <jameskuyper@verizon.net> - 2015-09-07 15:49 -0400
                Re: just curious:Equel Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-09-10 16:44 +0000
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-07 23:12 -0700
                Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-08 10:35 +0200
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-09 10:22 -0700
                Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-10 10:21 +0200
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-11 12:06 -0700
                Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-12 17:53 +0200
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-26 16:04 -0700
                Re: just curious:Equel Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-09-26 16:17 -0700
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-01 12:53 -0700
                Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-28 18:00 +0200
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-01 12:51 -0700
                Re: just curious:Equel Philip Lantz <prl@canterey.us> - 2015-09-23 22:18 -0700
                Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-24 10:08 +0200
                Re: just curious:Equel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-09-24 10:23 +0100
                Re: just curious:Equel Philip Lantz <prl@canterey.us> - 2015-09-24 10:28 -0700
                Re: just curious:Equel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-09-24 19:56 +0100
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-26 16:16 -0700
                Re: just curious:Equel August Karlstrom <fusionfile@gmail.com> - 2015-09-28 08:18 +0200
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-26 16:10 -0700
                Re: just curious:Equel supercat@casperkitty.com - 2015-09-27 11:40 -0700
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-29 10:03 -0700
                Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-06 13:25 -0700
                Re: just curious:Equel Ike Naar <ike@iceland.freeshell.org> - 2015-09-07 09:14 +0000
          Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-06 15:44 -0700
            Re: just curious:Equel Keith Thompson <kst-u@mib.org> - 2015-09-06 17:27 -0700
              Re: just curious:Equel Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-08 10:49 -0700
      Re: just curious:Equel James Kuyper <jameskuyper@verizon.net> - 2015-09-02 11:49 -0400
        Re: just curious:Equel Jay Braun <lyngwyst@gmail.com> - 2015-09-02 13:02 -0700
          Re: just curious:Equel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-09-02 13:08 -0700
            Re: just curious:Equel G G <gdotone@gmail.com> - 2015-09-02 16:10 -0700
  Re: just curious:Equel Bartc <bc@freeuk.com> - 2015-09-02 21:30 +0100
    Re: just curious:Equel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-09-02 13:37 -0700
      Re: just curious:Equel Jay Braun <lyngwyst@gmail.com> - 2015-09-02 13:44 -0700
        Re: just curious:Equel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-09-02 13:52 -0700
    Re: just curious:Equel G G <gdotone@gmail.com> - 2015-09-02 16:07 -0700
    Re: just curious:Equel Andreas Perstinger <andipersti@gmail.com> - 2015-09-03 08:49 +0000
      Re: just curious:Equel Bartc <bc@freeuk.com> - 2015-09-03 10:47 +0100
  Re: just curious:Equel G G <gdotone@gmail.com> - 2015-09-02 16:17 -0700

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