Dear "David Collier",
In message <memo.20091026103604.20...@postmaster+dexdyne.com.cix.co.uk> you
wrote:
> > I did not only describe it, I tested it. I just "tricked" a bit.
> > You asked to extract the last two digits, and I used "% 100" to do
> > this. Note that this works correctly in any number base - may it be
> > 10 or 16 or whatever :-)
> >
> > Hey, that was clever, wasn't it? :-)
>
> yeah it was - but of course I really wanted the next 2 digits as well....
> I'm hoping to make more than 100 units really! pardon me for
> over-simplifying my question.
Then do the same with "% 10000" and "/ 100" ?
> I wonder if it would be useful/helpful to allow the user to optionally
> over-ride the number base for reading and separately for writing by
> setexpr.
I don't see a need for it; certainly not here.
> That would extend it's usefulness without requiring an extra command or
> breaking any existing code
No extra command is needed here.
> setenv setexpr_in 10
> setenv setexpr_out 16
>
> If I wrote a patch would you look favourably on it?
I don't think so. If we did something like that, it should be generic
and not restricted to one command. And it would break a LOT of
existing scripts. And it is not needed at all, at least not for the
use case you have in mind here. [If anything is worth implementing at
all, then maybe the regexp handling present in standard expr
command.]
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
Testing can show the presense of bugs, but not their absence.
-- Edsger Dijkstra
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