9fans - fans of the OS Plan 9 from Bell Labs
 help / color / mirror / Atom feed
* [9fans] libbio questions
@ 2008-11-06  3:51 Pietro Gagliardi
  2008-11-06  4:21 ` Russ Cox
  0 siblings, 1 reply; 3+ messages in thread
From: Pietro Gagliardi @ 2008-11-06  3:51 UTC (permalink / raw)
  To: Fans of the OS Plan 9 from Bell Labs

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello. Why do we have something like

	vlong Boffset(Biobufhdr *r);

instead of

	vlong Boffset(Biobuf *r);

and

	long Bgetrune(Biobuf *r);

instead of

	Rune Bgetrune(Biobuf *r);

Thanks.

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.8 (Darwin)

iEYEARECAAYFAkkSacAACgkQuv7AVNQDs+xMIACeNsbjeH+E3dAUcPSc76kzzjuy
Q+oAnArcDCCVkxwVSuy2p4fwYRhVgBLG
=bsZB
-----END PGP SIGNATURE-----



^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [9fans] libbio questions
  2008-11-06  3:51 [9fans] libbio questions Pietro Gagliardi
@ 2008-11-06  4:21 ` Russ Cox
  2008-11-06  4:29   ` Pietro Gagliardi
  0 siblings, 1 reply; 3+ messages in thread
From: Russ Cox @ 2008-11-06  4:21 UTC (permalink / raw)
  To: Fans of the OS Plan 9 from Bell Labs

> Hello. Why do we have something like
>
>        vlong Boffset(Biobufhdr *r);
>
> instead of
>
>        vlong Boffset(Biobuf *r);

Because there is an anonymous Biobufhdr
in the Biobuf, so it doesn't matter.  At one point,
it was possible to declare your own buffered
i/o by just embedding a Biobufhdr and filling
it in correctly.

>        long Bgetrune(Biobuf *r);
>
> instead of
>
>        Rune Bgetrune(Biobuf *r);

Because Bgetrune needs to be able to return -1 on EOF.

Russ


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [9fans] libbio questions
  2008-11-06  4:21 ` Russ Cox
@ 2008-11-06  4:29   ` Pietro Gagliardi
  0 siblings, 0 replies; 3+ messages in thread
From: Pietro Gagliardi @ 2008-11-06  4:29 UTC (permalink / raw)
  To: Fans of the OS Plan 9 from Bell Labs

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Nov 5, 2008, at 11:21 PM, Russ Cox wrote:

> At one point, it was possible to declare your own buffered
> i/o by just embedding a Biobufhdr and filling it in correctly.

Is that still possible/useful?

Thanks for the rest of the info.

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.8 (Darwin)

iEYEARECAAYFAkkScpwACgkQuv7AVNQDs+yOFwCfYKCg+Bv7Dev+gbOwz3bE/8id
ccYAoIGxVrw9M6L6qi23eXdFw3SDQK9Z
=gW3h
-----END PGP SIGNATURE-----



^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-11-06  4:29 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-11-06  3:51 [9fans] libbio questions Pietro Gagliardi
2008-11-06  4:21 ` Russ Cox
2008-11-06  4:29   ` Pietro Gagliardi

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).