Hi Philippe,
thanks for the help. Maybe it would be a good idea to update the
documentation for
void TTree::SetBranchStatus(const char *bname, Bool_t status)
to say something about split branches.
Cheers,
Birger
On Thu, 17 Jul 2003, Philippe Canal wrote:
> Hi Birger,
>
> Currently SetBranchStatus work only on a name matching basis. Hence if you do not use a regular expression, SetBranchStatus will only affect one branch object (in particular it will NOT affect its potential sub-branches).
>
> To obtain the result you expected just do:
>
> inputChain->SetBranchStatus("BRawHeader*",1); <- This is a split branch
>
> Cheers,
> Philippe.
>
> -----Original Message-----
> From: koblitz@poly.in2p3.fr [mailto:koblitz@poly.in2p3.fr]
> Sent: Thursday, July 17, 2003 10:20 AM
> To: Philippe Canal
> Cc: Rene Brun; roottalk@pcroot.cern.ch
> Subject: Why can I not enable reading of a split branch?
>
>
> Hi Philippe,
>
> following my questions from yesterday I spend another afternoon hunting
> bugs in root (at least I consider this to be a bug).
> What I do is (same file/library as yesterday):
> 1. Create a chain inputChain
> 2. Add a file to it
> 3. Then
> inputChain->SetBranchStatus("*",0);
> inputChain->SetBranchStatus("BRawHeader",1); <- This is a split branch
> b_header=inputChain->GetBranch("BRawHeader");
> TRawHeader *header=0;
> b_header->SetAddress(&header);
> inputChain->GetEntry(3)
> -> No byte is read, but lots of constructors called, we had that
> yesterday...
> header->Print()
> -> header is not filled, but at least no crash...
>
> You can now nicely enable the individual branches of the split branch but
> enabling them all via inputChain->SetBranchStatus("BRawHeader",1); does
> not seem to work. This is especially problematic as I don't know in my
> code which input branches I have to expect. I consider this behaviour a
> bug, since enabling a branch should work irrespective of its split status.
>
> Cheers,
> Birger
>
>
--
Birger Koblitz Tel: +33/1 69 33 31 73
Ecole Polytechnique - LLR
Route de Saclay
F-91128 Palaiseau
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