[Gllug] endian.h

[Andy Farnsworth]

Hey,
  I bounced this question off a Guru friend of mine on the NLUG
http:www.nlug.org mailing list and got this response:

Let me know how it works out.

Andy

-----Original Message-----
From: nlug-request at bounce.netcentral.net
[mailto:nlug-request at bounce.netcentral.net]On Behalf Of Timothy Ball
Sent: February 05 2003 15:40
To: NLUG ListServ
Subject: [nlug] Re: FW: [Gllug] endian.h


On Wed, Feb 05, 2003 at 11:17:56AM +0100, Andy Farnsworth wrote:
> -----Original Message-----
> From: gllug-admin at linux.co.uk [mailto:gllug-admin at linux.co.uk]On Behalf
> Of Mike Brodbelt
> Sent: February 05 2003 03:18
> To: gllug at linux.co.uk
> Subject: [Gllug] endian.h
>
>
> One of the source files makes use of functions like betoh32(),
> letoh32(), and also the 16bit variants of those. On OpenBSD, the
> function prototypes are in <machine/endian.h>, but, though Linux has an
> endian.h file, those functions aren't in it.
>
> What can I replace <machine/endian.h> with in order to get this to
> compile? Or is it a case of #ifdef'ing out those function calls, and
> replacing them with Linux equivalents?
>

Big Endian (aka network byte order)
Little Endian  (busted x86 byte order)

So betoh32 <-> ntohl && letoh32 <-> htonl

--snip--snip--snip--
#define betoh32(x) 	ntohl(x)
#define letoh32(x) 	htonl(x)
--snip--snip--snip--

--timball

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-----Original Message-----
From: gllug-admin at linux.co.uk [mailto:gllug-admin at linux.co.uk]On Behalf
Of Mike Brodbelt
Sent: February 05 2003 03:18
To: gllug at linux.co.uk
Subject: [Gllug] endian.h





I'm interested in porting a small OpenBSD program to Linux, but I'm
currently having grief getting parts of it to compile.

One of the source files makes use of functions like betoh32(),
letoh32(), and also the 16bit variants of those. On OpenBSD, the
function prototypes are in <machine/endian.h>, but, though Linux has an
endian.h file, those functions aren't in it.

What can I replace <machine/endian.h> with in order to get this to
compile? Or is it a case of #ifdef'ing out those function calls, and
replacing them with Linux equivalents?

TIA,

Mike.


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