On 8/23/22 15:16, Alejandro Colomar wrote:
I.e., AFAIK, my_imaxabs(++x) would only do the ++ once, right? Is that what you were suggesting?
If that's what you meant, the macro seems safe:
$ cat imaxabs.c
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#define my_imaxabs(j) _Generic(INTMAX_C(0), \
long: labs(j), \
long long: llabs(j) \
/* long long long: lllabs(j) */ \
)
int
main(void)
{
off_t a;
a = (intmax_t) -1;
printf("imaxabs(%jd) == %jd\n", (intmax_t) -2, my_imaxabs(--a));
exit(EXIT_SUCCESS);
}
$ cc -Wall -Wextra imaxabs.c
$ ./a.out
imaxabs(-2) == 2
Cheers,
Alex
--
Alejandro Colomar
<http://www.alejandro-colomar.es/>
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