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Re: [RFA:] stdint.h take 2: Add INTPTR_MIN, INTPTR_MAX, UINTPTR_MAX

From: "Joseph S. Myers" <joseph at codesourcery dot com>
To: Gregory Pietsch <gpietsch at comcast dot net>
Cc: newlib at sourceware dot org
Date: Fri, 24 Apr 2009 13:48:42 +0000 (UTC)
Subject: Re: [RFA:] stdint.h take 2: Add INTPTR_MIN, INTPTR_MAX, UINTPTR_MAX
References: <200904092102.n39L28Sd018381@ignucius.se.axis.com> <Pine.LNX.4.64.0904241317270.23030@digraph.polyomino.org.uk> <49F1C26A.9080707@comcast.net>

On Fri, 24 Apr 2009, Gregory Pietsch wrote:

> Would
> 
> #define UINTPTR_MAX ((PTRDIFF_MAX << 1) + 1)

No, that expression has a signed type and UINTPTR_MAX must have an 
unsigned type, namely uintptr_t, and must also be usable in preprocessor 
#if expressions so you can't use a cast to uintptr_t.

-- 
Joseph S. Myers
joseph@codesourcery.com

References:
- [RFA:] stdint.h take 2: Add INTPTR_MIN, INTPTR_MAX, UINTPTR_MAX
  - From: Hans-Peter Nilsson
- Re: [RFA:] stdint.h take 2: Add INTPTR_MIN, INTPTR_MAX, UINTPTR_MAX
  - From: Joseph S. Myers

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