Henning Meier-Geinitz wrote:
>
> Hi,
>
> On Mon, May 07, 2001 at 08:05:40PM +0200, Oliver Rauch wrote:
> > In fact this is not defined very fine in the standard.
> > But after a close look to the sources of scanimage/xscanimage/xsane
> > it looks like all frontends do handle it the same.
> > So we should mention in the standard that the also last sane_read
> > that reutrns valid image data has to return with SANE_STATUS_GOOD.
>
> It's not very clear but the standard mentions:
>
> "The number of bytes returned is stored in *len. A backend must set
> this to zero when the call fails (i.e., when a status other
> than SANE_STATUS_GOOD is returned)"
>
> So you can't return data if you don't return SANE_STATUS_GOOD.
Yes, but you also can argue that SANE_STATUS_EOF is not a failure,
only the info that there is no more data than returned by
this sane_read command. It does not hurt to mention it explictly.
Bye
Oliver
-- Homepage: http://www.rauch-domain.de sane-umax: http://www.rauch-domain.de/sane-umax xsane: http://www.xsane.org E-Mail: mailto:Oliver.Rauch@rauch-domain.de-- Source code, list archive, and docs: http://www.mostang.com/sane/ To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com
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