Re: test13-pre5

["H. Peter Anvin" <hpa@zytor.com>]

Followup to:  <Pine.LNX.4.10.10012301422310.581-100000@cassiopeia.home>
By author:    Geert Uytterhoeven <geert@linux-m68k.org>
In newsgroup: linux.dev.kernel
> 
> What about defining new types for this? Like e.g. `x8', being `u8' on platforms
> were that's OK, and `u32' on platforms where that's more efficient?
> 

You may just want to look at how C99 handles this using <stdint.h>;
stdint.h defines types of the following format:

	 int, uint		... signed/unsigned

	 <size>			... exact size
	 _least<size>		... no smaller than
	 _fast<size>		... no smaller than, and efficient

	 _t

E.g. uint32_t, int_least64_t, uint_fast8_t (the latter could easily be
a 32-bit type, for eaxmple.)

In addition, constructor macros are defined, as well as (u)intmax_t
and (u)intptr_t; which are defined as the largest
possible integer and an integer large enough to hold a (void *),
respectively.

In other words:

	(void *)(uintptr_t)(void *)foo == (void *)foo

	-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
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