16-bit int

[Vincent Lefevre]

On 2012-08-10 09:05:13 +0000, Göran Steen wrote:
> Any C99 compiler - and almost all pre-C99 compilers - will have
> <stdint.h>. I don't know of any compiler less than 15 years old that
> doesn't come with a <stdint.h>, and many people using such compilers
> have written their own <stdint.h>.

I thought that Microsoft's compiler didn't have <stdint.h>.
I've also heard that <inttypes.h> is more common.

> The int_fast16_t and int_fast32_t types (and the unsigned versions)
> are mandatory in <stdint.h>, so you can take it for granted that
> /all/ compilers support them. This is unlike the fixed-size types
> (like int16_t) that will be defined if and only if the target
> supports types of exactly that size (some architectures don't
> support the smaller types).

But int_fast16_t is useless to test whether code can be affected
by 16-bit truncation on platforms for which int_fast16_t is really
a 16-bit type. For tests, int16_t is necessary. Now the user may
want to know what targets provide this type.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <http://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)