netdev - Re: oh crap... (re: %p6)

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Date:	Wed, 29 Oct 2008 11:16:54 -0700
From:	Joe Perches <joe@...ches.com>
To:	Harvey Harrison <harvey.harrison@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: oh crap... (re: %p6)

On Wed, 2008-10-29 at 10:24 -0700, Harvey Harrison wrote:
> Putting a modifier after the format specifier seems a little strange to me.

Harvey, please remember the whole %p<foo> concept is based on
modifier after format specifier.

I think %p6 followed by combinations of things:

"::" compressed v6, largest block of consecutive 0's replaced with ::
"-:" no separating colons, use space instead
"-0" no leading 0's
".4" last word as ipv4 dotted decimal
"x1" u8 form
"x2" be16
"x4" be32
"x8" be64

So that you could have:

%p6::		1234:000a::c0a8:0101
%p6::-0		1234:a::c0a8:0101
%p6::-0.4	1234:a::192.168.1.1
%p6-0-:x1	0 1 2 3 4 5 6 7 8 9 a b c d e f
%p6x1		00:01:02:03:04:05:06:07:09:0a:0b:0c:0d:0e:0f

etc.  If acceptable, I'll submit a patch.

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