Date: Tue, 25 Nov 2003 11:48:25 -0600 (CST) From: Sean Farley <sean-freebsd@farley.org> To: "Duane H. Hesser" <dhh@monroe.net> Cc: freebsd-hackers@freebsd.org Subject: Re: integer and long max/min values Message-ID: <20031125114606.J12765@thor.farley.org> In-Reply-To: <200311220201.hAM21kC15224@mx1.monroe.net> References: <200311220201.hAM21kC15224@mx1.monroe.net>
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On Fri, 21 Nov 2003, Duane H. Hesser wrote: > On 21-Nov-2003 Richard Coleman wrote: > > Jay Sern Liew wrote: > > > >> how do I find out the maximum (and minimum) value a long and int will hold > >> in C? (before it overflows or underflows) > >> > >> if it's compiler-dependent, then does anyone know where I can find the GCC > >> documentation for stuff like that? > > > > It will be architecture dependent (32 or 64 bit machines?). I doubt the > > GCC docs talk about this. You might check Richard Steven's book on > > "Advanced Unix Programming". It covers lots of information about > > standard machine limits and how to discover them. > > As a point of interest, there is a file > > /usr/src/contrib/gcc/enquire.c > > in the distributed sources which, when compiled and run, will > report the max and min values of short, long, int, float, etc. > along with various sizes and alignments. To get the latest version (5.1a) of enquire: http://homepages.cwi.nl/~steven/enquire.html Sean ----------------------- sean-freebsd@farley.org
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