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

[Jeff Johnston]

Patch checked in.

-- Jeff J.

Hans-Peter Nilsson wrote:
>> Date: Wed, 8 Apr 2009 22:03:16 +0200
>> From: Hans-Peter Nilsson <hp@axis.com>
>>     
>
>   
>> (now testing the patch instrumented to trig the !defined
>> __PTRDIFF_TYPE__ path)
>>     
>
> ...which of course showed a flaw: only __LONG_MAX__ was available.
> (Presumably noticeable only with non-gcc or gcc < 3.2.)
>
>
>  	* libc/include/stdint.h (INTPTR_MIN, INTPTR_MAX, UINTPTR_MAX): Define.
>
> Index: newlib/libc/include/stdint.h
> ===================================================================
> RCS file: /cvs/src/src/newlib/libc/include/stdint.h,v
> retrieving revision 1.13
> diff -u -p -r1.13 stdint.h
> --- newlib/libc/include/stdint.h	19 Jan 2009 22:02:06 -0000	1.13
> +++ newlib/libc/include/stdint.h	9 Apr 2009 20:54:03 -0000
> @@ -242,6 +242,9 @@ typedef uint64_t  	uint_least32_t;
>  #if defined(__PTRDIFF_TYPE__)
>  typedef signed __PTRDIFF_TYPE__ intptr_t;
>  typedef unsigned __PTRDIFF_TYPE__ uintptr_t;
> +#define INTPTR_MAX PTRDIFF_MAX
> +#define INTPTR_MIN PTRDIFF_MIN
> +#define UINTPTR_MAX (2UL * PTRDIFF_MAX + 1)
>  #else
>  /*
>   * Fallback to hardcoded values, 
> @@ -249,6 +252,9 @@ typedef unsigned __PTRDIFF_TYPE__ uintpt
>   */
>  typedef signed long intptr_t;
>  typedef unsigned long uintptr_t;
> +#define INTPTR_MAX __STDINT_EXP(LONG_MAX)
> +#define INTPTR_MIN (-__STDINT_EXP(LONG_MAX) - 1)
> +#define UINTPTR_MAX (__STDINT_EXP(LONG_MAX) * 2UL + 1)
>  #endif
>  
>  /* Limits of Specified-Width Integer Types */
>
> brgds, H-P
>