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


Groups > comp.lang.c > #59131

Re: Code for strtol/strtoul

From Steve Thompson <stevet810@gmail.com>
Newsgroups comp.lang.c
Subject Re: Code for strtol/strtoul
Date 2015-03-27 22:44 +0000
Organization Friends of the Galactic Collective
Message-ID <sJpGGh.iy8.risqm@gmail.com> (permalink)
References <mejjh4$i17$1@speranza.aioe.org> <meva6j$rc3$1@speranza.aioe.org> <j3RGDi.zPs.4TK2E@gmail.com> <mf3rtq$985$1@speranza.aioe.org>

Show all headers | View raw


On Fri, Mar 27, 2015 at 04:10:51PM +0100, jacob navia wrote:
> Le 27/03/2015 16:02, Steve Thompson a écrit :
> >On Wed, Mar 25, 2015 at 10:43:49PM +0100, jacob navia wrote:
> >>Th code posted doesn't handle the case:
> >>
> >>0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005
> >>
> >>Since I have a max length, I missed this case. I have fixed it, will
> >>post the fix later
> >
> >I'm surprised no-one has suggested that he use a textual number
> >representation that has some sort simple RLL compression.  That also
> >makes it much more efficient to do strlen() on average because the
> >char array will often be so much shorter if numbers like the above are
> >at all common in the program input.
> 
> Hi Steve
> 
> The input of strtol is fixed: it is a char *. I can't change that.
> I receive a sequence of digits, and I should output a number.
 
My mistake.  It should surprise no-one that handling pathological
input cases is no picnic.  I can't count the number of times I've had
to fix an input routine because I forgot to handle some corner case or
the other.  There's a lot of talk about "undefined behaviour" in non-
conforming C but "unexpected behaviour" ought to get honorable
mention even if it does not fully depend on non-conformance.



Regards,

Steve Thompson

-- 
"If I had a nickel for every time some idiot called me about a
computer problem that turned out to be user error, I would be able to
retire and spend the rest of my days cultivating clues in my backyard
hillside garden."  -- MysteryDog in 24hoursupport.helpdesk.

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


Thread

Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-21 12:09 +0100
  Re: Code for strtol/strtoul Bartc <bc@freeuk.com> - 2015-03-21 11:33 +0000
    Re: Code for strtol/strtoul Bartc <bc@freeuk.com> - 2015-03-21 11:47 +0000
    Re: Code for strtol/strtoul Greg Martin <greg.at.softsprocket@dot.com> - 2015-03-21 15:58 +0000
  Re: Code for strtol/strtoul Lőrinczy Zsigmond <nospam@for.me> - 2015-03-21 16:10 +0100
    Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-21 16:34 +0100
      Re: Code for strtol/strtoul Kaz Kylheku <kaz@kylheku.com> - 2015-03-21 16:10 +0000
    Re: Code for strtol/strtoul James Kuyper <jameskuyper@verizon.net> - 2015-03-21 12:53 -0400
    Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 14:18 -0700
      Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-21 22:46 +0100
        Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 15:23 -0700
          Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-21 23:42 +0100
            Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 16:06 -0700
              Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-22 00:29 +0100
                Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 20:18 -0700
      Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 15:54 -0700
        Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-22 08:34 +0100
        Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 19:42 -0700
          Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-25 10:40 -0700
            Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 16:17 -0700
              Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-25 20:27 -0700
                Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 09:08 -0700
  Re: Code for strtol/strtoul Greg Martin <greg.at.softsprocket@dot.com> - 2015-03-21 15:53 +0000
    Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 21:50 -0700
      Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-25 06:54 +0100
        Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-25 19:18 +1300
          Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-25 09:57 +0100
            Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-26 07:07 +1300
              Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-26 14:22 +1300
                Re: Code for strtol/strtoul asetofsymbols@gmail.com - 2015-03-26 00:17 -0700
                Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-28 12:07 +1300
                Re: Code for strtol/strtoul asetofsymbols@gmail.com - 2015-03-28 02:53 -0700
        Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 08:19 -0700
        Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 16:13 -0700
      Re: Code for strtol/strtoul Greg Martin <greg.at.softsprocket@dot.com> - 2015-03-25 13:42 +0000
        Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 17:20 -0700
          Re: Code for strtol/strtoul Kaz Kylheku <kaz@kylheku.com> - 2015-03-26 04:16 +0000
            Re: Code for strtol/strtoul asetofsymbols@gmail.com - 2015-03-26 00:27 -0700
              Re: Code for strtol/strtoul Kaz Kylheku <kaz@kylheku.com> - 2015-03-26 13:44 +0000
                Re: Code for strtol/strtoul fir <profesor.fir@gmail.com> - 2015-03-26 07:13 -0700
                Re: Code for strtol/strtoul asetofsymbols@gmail.com - 2015-03-26 08:30 -0700
                Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-29 15:13 +0000
            Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 09:47 -0700
          Re: Code for strtol/strtoul Greg Martin <greg.at.softsprocket@dot.com> - 2015-03-26 15:00 +0000
            Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-27 07:12 +1300
              Re: Code for strtol/strtoul Bartc <bc@freeuk.com> - 2015-03-26 19:11 +0000
                Re: Code for strtol/strtoul Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-26 15:09 -0700
                Re: Code for strtol/strtoul Richard Heathfield <rjh@cpax.org.uk> - 2015-03-26 22:13 +0000
                Re: Code for strtol/strtoul Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-26 15:20 -0700
                Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-30 09:59 +0000
                Re: Code for strtol/strtoul Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-30 06:38 -0700
                Re: Code for strtol/strtoul Richard Heathfield <rjh@cpax.org.uk> - 2015-03-30 14:41 +0100
                Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-04-06 12:52 +0000
                Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-27 18:07 +1300
                Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-29 15:17 +0000
                Re: Code for strtol/strtoul Kaz Kylheku <kaz@kylheku.com> - 2015-03-29 15:26 +0000
                Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-30 07:09 +1300
                Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-30 10:02 +0000
                Re: Code for strtol/strtoul Bartc <bc@freeuk.com> - 2015-03-29 18:53 +0100
            Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 15:38 -0700
  Re: Code for strtol/strtoul Robert Wessel <robertwessel2@yahoo.com> - 2015-03-21 16:48 -0500
  Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-22 20:45 +1300
    Re: Code for strtol/strtoul Ike Naar <ike@iceland.freeshell.org> - 2015-03-23 09:40 +0000
      Re: Code for strtol/strtoul Richard Heathfield <rjh@cpax.org.uk> - 2015-03-23 09:46 +0000
        Re: Code for strtol/strtoul Reinhardt Behm <rbehm@hushmail.com> - 2015-03-23 18:44 +0800
        Re: Code for strtol/strtoul Les Cargill <lcargill99@comcast.com> - 2015-03-23 20:29 -0500
          Re: Code for strtol/strtoul Richard Heathfield <rjh@cpax.org.uk> - 2015-03-24 08:12 +0000
      Re: Code for strtol/strtoul Robert Wessel <robertwessel2@yahoo.com> - 2015-03-23 05:27 -0500
      Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-24 07:03 +1300
        Re: Code for strtol/strtoul Ike Naar <ike@iceland.freeshell.org> - 2015-03-23 22:40 +0000
          Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-24 17:17 +1300
            Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 21:42 -0700
              Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-25 17:55 +1300
                Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 08:43 -0700
                Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-26 14:15 +1300
                Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 14:53 -0700
                Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-29 11:04 +1300
                Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-30 12:34 -0700
                Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-31 21:20 +1300
  Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 22:31 -0700
    Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-25 19:30 +1300
      Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 08:24 -0700
  Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-25 22:43 +0100
    Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-27 19:18 +1300
    Re: Code for strtol/strtoul Steve Thompson <stevet810@gmail.com> - 2015-03-27 15:02 +0000
      Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-27 16:10 +0100
        Re: Code for strtol/strtoul Steve Thompson <stevet810@gmail.com> - 2015-03-27 22:44 +0000
        Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-29 15:18 +0000
          Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-29 17:35 +0200
    Re: Code for strtol/strtoul Robert Wessel <robertwessel2@yahoo.com> - 2015-03-28 03:57 -0500
      Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-28 14:09 +0100
  Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-28 22:58 +1300
    Re: Code for strtol/strtoul Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-03-28 11:33 +0000
      Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-29 08:49 +1300
        Re: Code for strtol/strtoul Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-03-28 22:11 +0000
          Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-29 11:30 +1300

csiph-web