Re: Suggested method for returning a string from a C program?

Michael S <already5chosen@yahoo.com> writes:

On Thu, 20 Mar 2025 15:16:05 -0000 (UTC)
Muttley@DastardlyHQ.org wrote:
>

On Thu, 20 Mar 2025 16:59:14 +0200
Michael S <already5chosen@yahoo.com> wibbled:
>

On Thu, 20 Mar 2025 14:50:25 -0000 (UTC)
Muttley@DastardlyHQ.org wrote:
>

What makes you think they're macros?

>
PRIu64 and PRId64 are macros.  They are ugly.

>
Never even heard of them.  Looking them up I can't see much use for
them frankly except if you're starting out on an unknown system and
can't find out the info any other way which would be ... odd.

>
Then how exactly do you printf value of type int64_t in a code that
expected to pass [gcc] compilation with no warnings on two platforms,
one of which is 64-bit Unix/Linux and another is just about anything
else?

If I needed to print such a value using printf(), I would most
likely do something like this:

    typedef   signed long long SLL;
    typedef unsigned long long ULL;

    ...

    printf( "  the value of x64 is: %lld\n", (SLL){ x64 } );

and avoid the use of the <inttypes.h> macros altogether (not
to mention making the code more resilient against changes in
the type of x64).