Ethereal-dev: Re: [ethereal-dev] Re: Ethereal Contribution + patches

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From: Laurent Deniel <deniel@xxxxxxxxxxx>
Date: Tue, 01 Sep 1998 00:13:24 +0200
Gilbert Ramirez Jr. wrote:

> I don't think you messed them up; I think I might have put them in
> incorrectly. The following program shows that the big-endian/little-endian
> test in packet.h is backwards.
> 

Yes, a correct definition maybe (without the correct gtk types, but
casts are important) :

#if BYTE_ORDER == LITTLE_ENDIAN
#define pntohs(p)        ((u_short)                             \
                          ((u_short)*((u_char *)p+0)<<8|        \
                           (u_short)*((u_char *)p+1)<<0))

#define pntohl(p)       ((u_long)*((u_char *)p+0)<<24|          \
                         (u_long)*((u_char *)p+1)<<16|          \
                         (u_long)*((u_char *)p+2)<<8|           \
                         (u_long)*((u_char *)p+3)<<0)
#else
#define pntohs(p)        ((u_short)                             \
                          ((u_short)*((u_char *)p+1)<<8|        \
                           (u_short)*((u_char *)p+0)<<0))

#define pntohl(p)       ((u_long)*((u_char *)p+3)<<24|          \
                         (u_long)*((u_char *)p+2)<<16|          \
                         (u_long)*((u_char *)p+1)<<8|           \
                         (u_long)*((u_char *)p+0)<<0)
#endif /* LITTLE_ENDIAN */

Laurent.

--
Laurent DENIEL            | E-mail: deniel@xxxxxxxxxxx
Paris, FRANCE             |         deniel@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
                          | WWW   : http://www.worldnet.fr/~deniel
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