isascii(3) macros and casts

[Alejandro Colomar]

On Wed, Dec 11, 2024 at 12:42:13PM -0800, Paul Eggert wrote:
> On 2024-12-11 12:38, Paul Eggert wrote:
> >    #define isdigit(x) ((int) {x} - '0' <= 9u)
> 
> Oh, that should be
> 
>   #define isdigit(x) ((unsigned int) (int) {x} - '0' <= 9)

LGTM.

> 
> to avoid problems with signed integer overflow.

-- 
<https://www.alejandro-colomar.es/>
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