Front page | perl.perl5.porters |
Postings from March 2010
Andy Dougherty wrote: > On Mon, 1 Mar 2010, H.Merijn Brand wrote: > >> On Mon, 01 Mar 2010 11:43:27 -0700, karl williamson >> <public@khwilliamson.com> wrote: >> >>> Jarkko a long time ago that swashes and regex character classes should >>> be replaced by inversion lists for efficiency. >>> >>> Inversion lists can be searched binarily. bsearch() is a standard C >>> library routine, but the only mention of it in Perl is in the POSIX >>> module where it says it is not furnished. This makes me think there >>> must be a problem with using the library routine. Is there? >> Seems to be available on both my oldest HP-UX as well as on my oldest >> AIX. Do you need a probe for it in Configure? > > It's in my old SVR3 manuals too, though with a simpler prototype (char > instead of void, and no const). The "unimplemented" message has been > there since perl 5.000. I don't remember any specific problem with the > function. I suspect it's unimplemented in POSIX.pm simply because it's > never been a high enough priority for anyone to actually figure out how > they'd like to map it into perl. > > In short, if it makes sense to use it, I think you can go ahead and use > it. > That made me curious. I have an SVR2 manual from 1983, and it's in there, with char*. I think the void* and const constructs were added after that. They're not in K&R 1st edition, but are in the 2nd, 1988. Anyway, I doubt that we'd need a Configure probe, and this is not a short term project; I'm just thinking ahead about the possibilities.Thread Previous | Thread Next