Date: Mon, 09 Dec 2002 19:22:17 +0100 From: phk@FreeBSD.ORG To: "M. Warner Losh" <imp@bsdimp.com> Cc: arch@FreeBSD.ORG Subject: Re: le??toh, etc in userland Message-ID: <74122.1039458137@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 09 Dec 2002 09:50:32 MST." <20021209.095032.102181079.imp@bsdimp.com>
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In message <20021209.095032.102181079.imp@bsdimp.com>, "M. Warner Losh" writes:
>We should provide an implementation of {b,l}e{16,32}toh and
>hto{b,l}e{16,32} in libc. Any objections?
None as such.
I would really like to also have the "byte-encoding" version in a
more general place than in GEOM, but I am not aware of any suitable
standards in this area.
The reason of these is that the data encoded/decoded may not live
on native alignment boundaries, so the normal "swap-as-needed"
functions are not very efficient.
The current implementation in GEOM is currently strictly MD and
not optimized, that could and probably should change if we make this
a generic API:
void
g_enc_le4(u_char *p, uint32_t u)
{
p[0] = u & 0xff;
p[1] = (u >> 8) & 0xff;
p[2] = (u >> 16) & 0xff;
p[3] = (u >> 24) & 0xff;
}
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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