[ dropped bug-libtool ]
* Peter Rosin wrote on Sat, Oct 02, 2010 at 01:42:02PM CEST:
> Den 2010-10-02 08:32 skrev Ralf Wildenhues:
> >> + $SED -n -e '
> >> +s/^\(.\{79\}\)\(..*\)/\1\n\2/
> >
> > \n is portable only in the regex part, but not in the replacement part.
> > For that you need backslash then literal newline.
>
> Ok, so replacing with
>
> s/^\(.\{79\}\)\(..*\)/\1\
> \2/
>
> is portable?
Yes. Well, we might get the odd report about the Cygwin non-binmode
mount where the CR NL messes up things, but otherwise, it should work.
> >> +h
> >> +s/\([\\"]\)/\\\1/g
> >> +s/$/\\n/
> >> +s/\([^\n]*\).*/ fputs ("\1", f);/p
> >
> > Why not above, right after h, do s/\n.*// and then simplify this s
> > command?
> >
> >> +g
> >> +D'
>
> Because then we no longer know if the C-string "\n" at the end of the
> line (added by the 's/$/\\n/' statement) should be inserted or not.
> The trick is to add it and then cut it out if the string was too long
> (contains a literal newline from the s command). We can only have
> the "\n" for the final chunk, otherwise the output will be riddled
> with too many newlines.
Ah yes, thinko of mine, thanks for explaining.
Cheers,
Ralf
