Re: File list on Windows and Debian

[Anders Wirzenius <anders@no.email.thanks.invalid>]

"Ludovic Brenta" <ludovic@ludovic-brenta.org> writes:

> Anders Wirzenius writes :
> > I am trying to process files in a directory. They have to be processed
> > in alphabetical order. With following code I get a nice sorted list on
> > Windows XP but not sorted at all on Linux Debian. Have I missed
> > something that switches the sorting on on Debian (Sarge)?
> 
> I tried your program at home, and had to tweak it a little bit for it
> to compile. Then I also ghot unsorted directory entries, like I did
> with another program I wrote.
> 
> I think this is by design on GNU/Linux systems. They don't impose the
> overhead of sorting potentially large numbers of directory entries
> unless you really need to sort them.
> 
> If you insist on sorting, you'd have to do that yourself: first, store
> the directory entries (perhaps as GNAT.OS_Lib.String_Access values) in
> a container and sort it. I would suggest either GNAT.Dynamic_Tables and
> GNAT.Heap_Sort_G, or Charles.Vectors.Unbounded.Generic_Sort in the
> libcharles0-dev package. Beware however of unbounded memory usage.
> 
> HTH
> 
> -- 
> Ludovic Brenta.
> 

I found the package OS_Services which does the job. It uses
GNAT.Heap_Sort_G.

Many thanks to J-P Rosen for a very useful package.

-- 
Anders