Re: Endian portability #defines in GLIB

[Raja R Harinath <harinath cs umn edu>]

Manish Singh <yosh@gimp.org> writes:
> > Perhaps we could add #defines for ntohs, htons, ntohl, and htonl
> > implemented in terms of the more verbose forms Tim suggests.
> 
> Ok, I've revised the endian stuff somewhat. Especially, I've special
> cased different sized types. If there aren't any objections, I will
> commit this:
[snip]

It's too big ;-)

I have been working on a patch to `glib' to move some of the #ifdef
testing into `configure.in'.  This way, instead of having 

	#ifdef FOO
	# define BAR A
	#else
	# define BAR B
	#endif

in `glib.h', you will find

	#define BAR B

(or A, depending on FOO), magically defined in `glibconfig.h'.  The nice
part is that you should be able to do

	case $sizeof_int in
	2) bits=16;;
	4) bits=32;;
	8) bits=64;;
	*) echo wow;;
	esac
	cat >>glibconfig.h <<EOF
	#define GINT_FROM_BE(from)	GINT${bits}_FROM_BE(from)
	#define GINT_FROM_LE(from)	GINT${bits}_FROM_LE(from)
	EOF

Much better, don't you think (nice to have another macro processor
before `cpp').

I'll try to send it in tomorrow.  Can you wait till then?

- Hari
-- 
Raja R Harinath ------------------------------ harinath@cs.umn.edu
"When all else fails, read the instructions."      -- Cahn's Axiom
"Our policy is, when in doubt, do the right thing."   -- Roy L Ash