Leafxxx->GetValue() return 0 when called into c code

Nagni · March 24, 2004, 6:03pm

Hi,

i’m tring to prepare an interface for FORTRAN an so i need to be able to read leaves.

I don’t understand why in the following code doesn’t give me back a value for “GetValue(##)” but always 0.
My leaf inherits from TLeafElement, the variable tree has been setted before as a general variable so it’s not null, also because all other GetNdata(), GetType(), etc… give me back correct values

double getleafdata_(int *Nentry, int *index, char leafName, int leafName_len){
leaf = (TLeaf)tree->GetLeaf(leafName);
double tempD;

if(tree != 0) tree->GetEntry((Int_t)*Nentry);
if (leaf->InheritsFrom(“TLeafElement”)){
TLeafElement tle = (TLeafElement)tree->GetLeaf(leafName);
tempD = (double)tle->GetValue(*index);
printf(“%d”, tempD);
}

printf(“leafNAme------>%s \n”, leafName);
printf(“Nentry------>%d \n”, Nentry);
printf(“index------->%d \n”, index);
printf(“Ndata------->%d \n”, leaf->GetNdata());
printf(“value------->%s \n”, leaf->GetValue(*index)); <-----this one get null in return
leaf->PrintValue(1); <---- this one print the correct value on stdout

i made the same command through the root prompt

leaf = (TLeaf*)tree->GetLeaf(“somename”);
leaf->GetValue(somevalue)

and it work… some hints?

pcanal · March 24, 2004, 10:57pm

This is odd that you had to add [i](double)[/i]
Did you check the value of *index compare to GetNdata()?

Philippe.

This is odd that you had to add i[/i]
Did you check the value of *index compare to GetNdata()?

Philippe.

Nagni · March 25, 2004, 8:33am

yes index and Nentry are in the correct ranges…

printf(“leafName------>%s \n”, leafName);
printf(“Nentry------>%d \n”, *Nentry);
printf(“index------->%d \n”, *index);
printf(“Ndata------->%d \n”, leaf->GetNdata());
printf(“value------->%u \n”, leaf->GetValue(*index));
leaf->PrintValue(*index);

the output is

leafName------>Records.TM_RECORD_OBT
Nentry------>0
index------->1
Ndata------->1
value------->0
Records.TM_RECORD_OBT = 9243

as you can see GetValue is still zero…

Cheers,
Maurizio

pcanal · March 25, 2004, 4:01pm

[quote]index------->1
Ndata------->1
value------->0
Records.TM_RECORD_OBT = 9243

as you can see GetValue is still zero… [/quote]
And this is normal. The ranger of the data is from 0 to Ndata exclusive.
I.e. You have to transform fortran index (1 to Ndata inclusive) to C index (0 to Ndata exclusive).

Cheers,
Philippe.

Nagni · March 29, 2004, 7:29am

but it can’t be because i tried also to set by hands the value in the C code and these are the
results

leafName------>Records.TM_RECORD_OBT
Nentry------>0
index------->0
Ndata------->1
value------->0
Records.TM_RECORD_OBT = 9243

leafName------>Records.TM_RECORD_OBT
Nentry------>1
index------->0
Ndata------->1
value------->0
Records.TM_RECORD_OBT = 9243

leafName------>Records.TM_RECORD_OBT
Nentry------>1
index------->1
Ndata------->1
value------->0
Records.TM_RECORD_OBT = 9243

leafName------>Records.TM_RECORD_OBT
Nentry------>0
index------->1
Ndata------->1
value------->0
Records.TM_RECORD_OBT = 9243

other idea?

pcanal · March 29, 2004, 5:02pm

Hi,

I would need to look at the root file. Please let me know where to find it.

Cheers,
Philippe

Nagni · March 29, 2004, 5:22pm

Hi,

this is the file you asked for.

Thanks,
Maurizio
Run0001.Tmtc.Event.root (10.2 KB)

pcanal · March 29, 2004, 6:13pm

Hi,

This is quite odd
I am unable to reproduce any problem.
In addition the code execute by PrintValue and GetValue is extremely similar (i.e. I don’t see the difference in you case).
Are you using a MakeClass generated skeleton?
Can you send me a tar file I can use to reproduce your problem?

Cheers,
Philippe.

Nagni · March 29, 2004, 10:04pm

Hi,

here is code with also a compiled version of the code just execute the “edai” file (transl. of “c’mon!”)

really thanks!

Maurizio
interface.tar.gz (29 KB)

pcanal · March 29, 2004, 10:11pm

Hi,

Which platform is it compiled for?
How can I recompile it?
How can I run it?

Philippe

Nagni · March 29, 2004, 10:21pm

Hi,

well… it’s all in the file called “compile”

isn’t it?

cheers
Maurizio

pcanal · March 29, 2004, 10:23pm

The file named ‘compile’ appears (to me) as a binary file. I can read its content with a text editor and can not execute it either.

Cheers,
Philippe.

Nagni · March 29, 2004, 10:28pm

you are right…i don’t know why it is in such a shape… tomorrow i’ll take a look it it … it have not to be in that way…

have a good night

Cheers

Maurizio

Nagni · March 29, 2004, 10:45pm

Well…
you has been so nice that i couldn’t leave you without what you asked for so…
here a new tar file with correct “compile” file

Cheers
Maurizio
interface.tar.gz (129 KB)

pcanal · March 29, 2004, 11:04pm

Hi,

The index has to be a C++ index AND you have properly use the value.
Your code reads:

this interpretes the argument to print a unsigned int. Since the argument is a double, it does not work right.
Once I use:

And set index to 0, and change the return value getleafdata to

I get the ouput below (which seems correct).

Cheers,
Philippe.

bash-2.05a$ ./edai
Hello, world.
Warning in TClass::TClass: no dictionary for class pamela::AlgorithmInfo is available
Warning in TClass::TClass: no dictionary for class pamela::RunInfo is available
Warning in TClass::TClass: no dictionary for class pamela::SubPacket is available
Warning in TClass::TClass: no dictionary for class pamela::TmtcEvent is available
Warning in TClass::TClass: no dictionary for class pamela::TmtcRecord is available
Records 3.
Event
fUniqueID
fBits
Tmtc_crc_ok
Records
Records.fUniqueID
Records.fBits
Records.TM_RECORD_OBT
Records.TM_DEA_ANA[16]
Records.TM_TH_ANA[16]
Records.TM_BIL_DIAG_ACQ[8]
Records.TM_CC_DIAG_ACQ[32]
Records.TM_DBL_ACQ[8]
Records.TM_DS_16_ACQ[2]
Records.TM_RECORD_CRC
Records.tmtc_crc_tot_ok
Records.TM_DEA_ANA_P[16]
Records.TM_TH_ANA_P[16]
leafName------>Records.TM_RECORD_OBT
Nentry------>0
index------->0
Ndata------->1
value------->9243.000000
Records.TM_RECORD_OBT = 9243
Records.TM_RECORD_OBT
0 0 9243