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Groups > comp.lang.c > #59294

Re: Test for overflow

From James Kuyper <jameskuyper@verizon.net>
Newsgroups comp.lang.c, sci.math.symbolic
Subject Re: Test for overflow
Date 2015-03-30 13:32 -0400
Organization Self
Message-ID <551988B8.9030403@verizon.net> (permalink)
References <mfbbc6$9h9$3@speranza.aioe.org> <551985CA.7000409@verizon.net>

Cross-posted to 2 groups.

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On 03/30/2015 01:20 PM, James Kuyper wrote:
...
> y=x. Therefore, your test will misclassify some of the values of tvalue
> in that range. It will also mishandle ULLONG_MAX*base if ULLONG_MAX%base==0.

For ULLONG_MAX == 0xFFFFFFFFFFFFFFFF, the minimum permitted value, that
applies to base==3, base==5, base==15, and base==17.

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Thread

Test for overflow jacob navia <jacob@jacob.remcomp.fr> - 2015-03-30 13:17 +0200
  Re: Test for overflow Lőrinczy Zsigmond <zsiga@nospam.for.me> - 2015-03-30 13:34 +0200
  Re: Test for overflow Richard Damon <Richard@Damon-Family.org> - 2015-03-30 07:42 -0400
    Re: Test for overflow asetofsymbols@gmail.com - 2015-03-30 04:47 -0700
      Re: Test for overflow jacob navia <jacob@jacob.remcomp.fr> - 2015-03-30 13:57 +0200
        Re: Test for overflow Richard Damon <Richard@Damon-Family.org> - 2015-03-30 08:24 -0400
  Re: Test for overflow Richard Heathfield <rjh@cpax.org.uk> - 2015-03-30 13:03 +0100
  Re: Test for overflow Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-30 06:54 -0700
  Re: Test for overflow James Kuyper <jameskuyper@verizon.net> - 2015-03-30 13:20 -0400
    Re: Test for overflow James Kuyper <jameskuyper@verizon.net> - 2015-03-30 13:32 -0400
    Re: Test for overflow James Kuyper <jameskuyper@verizon.net> - 2015-03-30 19:43 -0400
      Re: Test for overflow jacob navia <jacob@jacob.remcomp.fr> - 2015-03-31 07:11 +0200
        Re: Test for overflow James Kuyper <jameskuyper@verizon.net> - 2015-03-31 13:41 -0400
          Re: Test for overflow jacob navia <jacob@jacob.remcomp.fr> - 2015-03-31 19:48 +0200
            Re: Test for overflow James Kuyper <jameskuyper@verizon.net> - 2015-03-31 13:58 -0400
  Re: Test for overflow Thomas Jahns <jahns@idontlikespam.dkrz.de> - 2015-04-01 10:12 +0200
    Re: Test for overflow Richard Heathfield <rjh@cpax.org.uk> - 2015-04-01 09:43 +0100
      Re: Test for overflow Thomas Jahns <jahns@idontlikespam.dkrz.de> - 2015-04-01 10:59 +0200
        Re: Test for overflow Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-01 04:07 -0700
          Re: Test for overflow raltbos@xs4all.nl (Richard Bos) - 2015-04-01 13:52 +0000

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