Hello.
My macro accepts a txt file as input, which should contain a list of ROOT files (preceded by the protocol, if needed), one per line, to be chained together. However, I cannot execute it both compiled and interpreted: it works only when compiled.
Could you please tell me what is the problem?
Many thanks,
Diego
The code is the following:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
#include "TROOT.h"
#include "TChain.h"
#include "TCint.h"
#include "TSystem.h"
int scanFiles(string list="") {
if (list.empty()) {
cerr << "Usage:" << endl
<< "\troot[] .x scanFiles.C(\"list.txt\"); // from CINT" << endl
<< "\t$ root -b -q \"scanFiles.C(\\\"list.txt\\\")\" # from the shell" << endl;
return -1;
}
gSystem->Load("libCintex.so");
gROOT->ProcessLine("Cintex::Enable();");
gSystem->Load("libTrigEventTPCnv.so");
const char* chainName="YOUR CHAIN NAME HERE";
/// open TXT file
ifstream txtfile(list.c_str());
if (!txtfile.is_open()){
cerr << "Error: cannot open " << list << endl;
return -1;
}
/// create the TChain
TChain* chain = new TChain(chainName);
/// loop on lines, i.e. (protocol:) ROOT file names
char tmp[256];
int nFiles=0;
while ((txtfile.getline(tmp, 256)).good()){
cout << "Found " << tmp << endl; // DEBUG
chain->Add(tmp); // add file to the chain
++nFiles;
}
txtfile.close();
cout << "Found " << nFiles << " files. Chain has "
<< chain->GetEntries() << " entries" << endl;
// chain->Process("TSelector BASED CODE");
return 0;
}@@@@ Here is what happens when I call it in different ways:
root [0] .x scanFiles.C(“tmp.list”)
Error: non class,struct,union object txtfile used with . or -> scanFiles.C:45:
Error: non class,struct,union object txtfile.getline(tmp,256) used with . or -> scanFiles.C:45:
*** Interpreter error recovered ***
root [1] .x scanFiles.C+(“tmp.list”)
Info in : script has already been loaded in interpreted mode
Info in : unloading ./scanFiles.C and compiling it
Info in TUnixSystem::ACLiC: creating shared library ./scanFiles_C.so
FATAL 2008-Aug-16 13:46:56 [static void ers::ErrorHandler::SignalHandler::action(…) at ers/src/ErrorHandler.cxx:88] Got signal 11 Segmentation fault (invalid memory reference)
@@@@ This is quite strange, because if I don’t change it and use ROOT in batch mode this is what happens:
$ root -b -q “scanFiles.C+(“tmp.list”)”
(…)
Found 1 files. Chain has 9966 entries
(int)0
@@@@ But when I try again to let CINT interpret it:
$ root -b -q “scanFiles.C(“tmp.list”)”
-
* -
W E L C O M E to R O O T * -
* - Version 5.18/00a 20 February 2008 *
-
* - You are welcome to visit our Web site *
-
[root.cern.ch](http://root.cern.ch) * -
*
ROOT 5.18/00a (branches/v5-18-00-patches@22235, Feb 21 2008, 21:46:00 on linux)
CINT/ROOT C/C++ Interpreter version 5.16.29, Jan 08, 2008
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
root [0]
Processing scanFiles.C(“tmp.list”)…
Error: non class,struct,union object txtfile used with . or -> scanFiles.C:45:
Error: non class,struct,union object txtfile.getline(tmp,256) used with . or -> scanFiles.C:45:
*** Interpreter error recovered ***
@@@@ Now let’s try again from CINT, this time first asking it to load the macro, then to interpret it (the reverse order as before):
root [0] .x scanFiles.C+(“tmp.list”)
(…)
Found 1 files. Chain has 9966 entries
(int)0
root [1] .x scanFiles.C(“tmp.list”)
Error: Redefinition of default argument scanFiles.C:17:
*** Interpreter error recovered ***
