Re: Where to find documentation on pre-defined macros

[David Daney <ddaney at avtrex dot com>]

Brian Dessent wrote:
> Lee Rhodes wrote:
>
> >   Nonetheless, if I had to write low-level code that depended on ENDIANess,
> > what is the most robust/platform-independent way to make that determination
> > (and not pay run-time execution costs)?
>
> Autoconf has the AC_C_BIGENDIAN macro that will determine the
> endian-ness of the target at configure time.

And #include <endian.h> defines __BYTE_ORDER, __LITTLE_ENDIAN, and 
__BIG_ENDIAN which can be tested at compile time.

You can also use htons/ntohs and ntonl/ntohl and they take care of it 
for you.

David Daney