Messages in this thread | | | Date | Tue, 1 Sep 2009 15:41:44 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH V6 1/2] introduce ALS sysfs class |
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> > > IMO, 0 and -1 are not errors. they just suggest that the Ambient Light > > > illuminance is beyond the device support range, while the device is > > > still working normally. > > > what about exporting these values (0 and -1) to user space directly? > > > > Returning 0 for "below" range and 99999999 for "above" range would be > > nice, yes. > > Why not 0 and "all ones" or 0 and -1. > > Is there anything wrong with -1 in particular?
Normal people expect -1 to be less than 123, and output is in ascii. If you make it ((unsigned) ~0) I guess that becomes acceptable. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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