Mail Archives: cygwin/2002/09/08/11:25:18
On Sat, 7 Sep 2002, Max Bowsher wrote:
> Igor Pechtchanski wrote:
> >>> On Thu, 5 Sep 2002, Max Bowsher wrote:
> >>>
> >>>> I had an idea:
> >>>> sedpat6='s,\(-m [0-7]*\)6,\17,g'
> >>>> sedpat4='s,\(-m [0-7]*\)4,\15,g'
> >>>> sed -e "$sedpat4" -e "$sedpat4" -e "$sedpat4" -e "$sedpat6" -e
> >>>> "$sedpat6" -e "$sedpat6"
> >>>>
> >>>> but can anyone show me a way without repeating each pattern 3
> >>>> times?
>
> > Okay, then... There is a pure sed solution that doesn't use
> > repetition. It's peculiar, and involves a loop. In this particular
> > case, you are probably better off just repeating the patterns 3
> > times. But I'm posting it just to show that it can be done. Call me
> > vain. :-D
> >
> > Okay, here goes:
> >
> > sed 's/$/0^A1^A2^B3^C4^E5^E6^G7^G/;:a;s/\(-m [0-7^A-^G]*\)\([0-7]\)\(.*\2\)\(.\)/\1\4\3\4/;ta;s/.\{16\}$//;y/^A^B^C^E^G/12357/'
>
> Thankyou :-) You clearly qualify as a sed wizard, 1st class!
>
> However, in analysing your solution, I learnt something new about sed -
> namely, the t command.
> So, I can use the simpler script:
>
> ':a;s/\(-m [0-7]*\)6/\17/;s/\(-m [0-7]*\)4/\15/;ta'
>
> Now, to build that into libtool...
>
> Thanks for the help!
> Max.
D'oh! *smacks head*
I've learned something new from your solution, too: don't ever
overcomplicate :-D
I can't believe I haven't tried that one first...
Igor
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