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Re: Patch: Re: glimits.h is not compatible with -traditional
- To: "John David Anglin" <dave at hiauly1 dot hia dot nrc dot ca>
- Subject: Re: Patch: Re: glimits.h is not compatible with -traditional
- From: Alexandre Oliva <aoliva at redhat dot com>
- Date: 01 Sep 2000 22:12:10 -0300
- Cc: ghazi at caip dot rutgers dot edu (Kaveh R. Ghazi), gcc-bugs at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
- Organization: GCC Team, Red Hat
- References: <200009012048.QAA17171@hiauly1.hia.nrc.ca>
On Sep 1, 2000, "John David Anglin" <dave@hiauly1.hia.nrc.ca> wrote:
> +#ifdef __STDC__
> #define UINT_MAX (INT_MAX * 2U + 1)
> +#else
> +#define UINT_MAX ((unsigned)INT_MAX * 2 + 1)
> +#endif
I don't think there are equivalent. INT_MAX * 2 overflows. The right
fix would be `INT_MAX * (unsigned)2 + 1'. In any case, it wouldn't be
possible to use these macros as CPP constants; I'm not sure whether
this is required by the standards.
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
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