Hi Christian,
if you send me a patch with these proposed enhancements I'll be happy to
integrate them in the system.
Cheers, Fons.
Christian Holm Christensen wrote:
>
> Hi ROOT'ers,
>
> I'd like very much if it would be possible to iterate over a
> TSystemDirectory. I imagine one could do
>
> TSystemDirectory dir("some directory");
> TSystemFile* file = 0;
> TIter next(dir);
>
> while ((file = (TSystemFile*)next())) {
> // do something in this file
> ...
> }
>
> As an additional feature, one could have a constructor that uses
> wildcard globing:
>
> TSystemDirectory dir("some directory", "*.root");
>
> If using a TIter would not be feasable for TSystemDirectory, could one
> at least have something like:
>
> UInt_t TSystemDirectory::GetEntries();
> TSystemFile* TSystemDirectory::At(UInt_t i);
>
> so that one may iterate through the list in a sligtly more clumbersome
> way:
>
> Int_t n = dir.GetEntries();
>
> for (Int_t i = 0; i < n; i++) {
> file = dir.At(i);
> // do something in this file
> ...
> }
>
> I realise ofcourse, that this would mean taking the internal list
> initialisation out of the Browse method, and into something else like
> say Initialise. The list can then be created "just-in-time":
>
> TSystemDirectory::Browse(TBrowser* b) {
> //
> if (!fListOfDirEntries)
> Initialise();
> ...
> }
>
> and so on. I don't see why you don't have "." and ".." in the
> list. I'd imagine something like
>
> TSystemDirectory::Browse(TBrowser* b) {
> //
> .
> TString *name = GetTitle();
> if (!name->CompareTo(".."))
> *name = gSystem->DirName(gSystem->WorkingDirectory());
> ...
> }
>
> would work.
>
> Anyway, just a few thoughts on this. I've this functionallity is in
> ROOT somewhere and I've just overlooked it, then I'm sorry for
> bothering you, and could someone please point out to me where -
> thanks.
>
> Yours,
>
> Christian -----------------------------------------------------------
> Holm Christensen Phone: (+45) 35 35 96 91
> Sankt Hansgade 23, 1. th. Office: (+45) 353 25 305
> DK-2200 Copenhagen N Web: www.nbi.dk/~cholm
> Denmark Email: cholm@nbi.dk
--
Org: CERN, European Laboratory for Particle Physics.
Mail: 1211 Geneve 23, Switzerland
E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248
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