l i n u x - u s e r s - g r o u p - o f - d a v i s
L U G O D
 
Next Meeting:
December 2: Social gathering
Next Installfest:
TBD
Latest News:
Nov. 18: Club officer elections
Page last updated:
2010 Jun 29 06:58

The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox-tech] wierd u_int32
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox-tech] wierd u_int32



Looks like a nonstandard typedef for an unsigned 32-bit integer.  The actual typedef would generally be compiler-specific, but

typedef unsigned int u_int32;

would probably work on any linux computer.

"Brian Lavender" <brian@brie.com> wrote:

>I have some code that has the following snippet, but it has this
>u_int32. What the heck is u_int32?
>
>brian
>
>
>/*
>  Courtesy of http://ettercap.sourceforge.net/
>*/
>#ifndef CFG_LITTLE_ENDIAN
>#define ptohs(x) ( (u_int16_t)                       \
>                      ((u_int16_t)*((u_int8_t *)x+1)<<8|  \
>                      (u_int16_t)*((u_int8_t *)x+0)<<0)   \
>                    )
>
>#define ptohl(x) ( (u_int32)*((u_int8_t *)x+3)<<24|  \
>                      (u_int32)*((u_int8_t *)x+2)<<16|  \
>                      (u_int32)*((u_int8_t *)x+1)<<8|   \
>                      (u_int32)*((u_int8_t *)x+0)<<0    \
>                    )
>#else
>#define ptohs(x) *(u_int16_t *)(x)
>#define ptohl(x) *(u_int32 *)(x)
>#endif
>-- 
>Brian Lavender
>http://www.brie.com/brian/
>
>"There are two ways of constructing a software design. One way is to
>make it so simple that there are obviously no deficiencies. And the other
>way is to make it so complicated that there are no obvious deficiencies."
>
>Professor C. A. R. Hoare
>The 1980 Turing award lecture
>_______________________________________________
>vox-tech mailing list
>vox-tech@lists.lugod.org
>http://lists.lugod.org/mailman/listinfo/vox-tech

---------------------------------------------------------------------------
Jeff Newmiller                        The     .....       .....  Go Live...
DCN:<jdnewmil@dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live Go...
                                      Live:   OO#.. Dead: OO#..  Playing
Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
/Software/Embedded Controllers)               .OO#.       .OO#.  rocks...1k
---------------------------------------------------------------------------
Sent from my phone. Please excuse my brevity.
_______________________________________________
vox-tech mailing list
vox-tech@lists.lugod.org
http://lists.lugod.org/mailman/listinfo/vox-tech



LinkedIn
LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
facebook
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
Appahost Applications
For a significant contribution towards our projector, and a generous donation to allow us to continue meeting at the Davis Library.