Re: header file substitutes

[Bruno Haible]

Hi Collin,

> IIRC in <stdbit.h> there is:
> 
>      #define __STDC_ENDIAN_LITTLE__ /* Unique constant */
>      #define __STDC_ENDIAN_BIG__ /* Unique constant */
>      #define __STDC_ENDIAN_NATIVE__ /* __STDC_ENDIAN_LITTLE__ or 
> __STDC_ENDIAN_BIG__ */

You can work on this, once Paul has created an 'stdbit' module with the
3 sets of functions, as mentioned in the other mail, I would say.

> But, I think the next POSIX revision has <endian.h> like Glibc which I
> prefer.

Preference or not — both ISO C and POSIX are relevant for us. If ISO C
has endianness macros in <stdbit.h> and POSIX has endianness macros in
<endian.h>, we will implement both.

> So these defines:
> 
>     #define LITTLE_ENDIAN /* Unique constant */
>     #define BIG_ENDIAN /* Unique constant */
>     #define BYTE_ORDER /* LITTLE_ENDIAN or BIG_ENDIAN */
> 
> plus functions or macros:
> 
>      uint16_t be16toh (uint16_t);
>      uint16_t htobe16 (uint16_t);
> 
> I could try to work on that if it seems useful to anyone else.

Indeed, I see that this is scheduled for inclusion in the next POSIX
revision: https://www.austingroupbugs.net/view.php?id=162

It is useful to do this already now, before the next POSIX revision is
official, because when it becomes official it will contain *many* new
functionalities. (And this new functionality is unlikely to change.
It's been sitting in the waiting line since 2011 (!).)

Bruno