netdev - Re: [PATCH] add %pM printf format specifier

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Date:	Sun, 26 Oct 2008 20:33:11 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Harvey Harrison <harvey.harrison@...il.com>
Cc:	David Miller <davem@...emloft.net>, anders@...uras.de,
	netdev@...r.kernel.org
Subject: Re: [PATCH] add %pM printf format specifier

On Sun, 2008-10-26 at 12:01 -0700, Harvey Harrison wrote:
> On Sun, 2008-10-26 at 09:30 +0100, Johannes Berg wrote:
> > static char *ip6_string(char *buf, char *end, be16 *addr, int field_width, int precision, int flags)
> > {
> > 	char ip6[8*5];
> > 	char *p = ip6;
> > 	int i;
> > 	u16 tmp;
> > 
> > 	for (i=0; i<7; i++) {
> > 		tmp = cpu_to_le16(addr[i]);
> 
> 		tmp = be16_to_cpup(addr + i);
> 
> > 		p = pack_hex_byte(p, tmp >> 8);
> > 		p = pack_hex_byte(p, tmp & 0xFF);
> > 		if (!(flags & SPECIAL))
> > 			*p++ = ':';
> > 	}
> > 	tmp = cpu_to_le16(addr[7]);
> 
> 	tmp = be16_to_cpup(addr + 7);
> 
> Or maybe just cast addr to char * and avoid the byteswapping altogether.

Yeah, this was obviously not tested. Want to build it? I don't have
access to a fast build machine right now.

johannes

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