softrig/compress.C

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#include "TFile.h"
#include "TTree.h"
#include "TString.h"
#include "TEventList.h"
#include "TDirectory.h"
#include <iostream>
#include "TObjArray.h"
#include "TRegexp.h"
#include <vector>

typedef std::vector<TString> StrVec;

int SplitString(TString s, TString delim, StrVec &toks)
{
        toks.clear();
        TObjArray *tok = s.Tokenize(delim);
        int N = tok->GetEntries();      
        for (int i=0;i<N;++i) 
        {
                TString token = (((TObjString*)tok->At(i))->String()).Strip(TString::kBoth);
                toks.push_back(token);
        }
        return toks.size();
}

int compress(TString ntp, TString fnamein, TString fnameout, TString bnames="", TString precut="tag" )
{
        if (bnames=="*" && precut=="") 
        {
                cout <<"Nothing to compress. Exiting."<<endl;
                return;
        }
        
        TString smode = ntp(1,ntp.Length());
        int mode = smode.Atoi()/10;
        bool dst = (mode == 11 || mode == 13 || mode == 15); 
        
        // default branches for SoftTrigger     
        if (bnames=="")
        {
                bnames += "ev mode run recmode reccnt nsig mmiss xm xmct";
                bnames += " es* *p *tht *pcm *thtcm *pt *ang *pid* *poc*";
                if (dst) bnames += " xmdif";
                
                // vetos
                bnames +=" !*beam* !*vx !*vy !*vz !t* !*pdg* !*pocmag tag";
        }
        
        StrVec toks;
        if (bnames.Index(" ")>=0) SplitString(bnames," ", toks);
        else SplitString(bnames,"§", toks);
                
        TFile *fi = new TFile(fnamein,"READ");
        TTree *ti = (TTree*) fi->Get(ntp);
        
        cout <<"Converting tree '"<<ntp<<"': "<<fnamein<<" ("<<ti->GetNbranches()<<" br, "<<ti->GetEntriesFast()<<" ev) ... "<<flush;

        ti->Draw(">>el",precut);
        TEventList *el = (TEventList*)gDirectory->Get("el");
        
        ti->SetBranchStatus("*",0);
        for (int i=0;i<toks.size();++i)
        {
                if (toks[i].BeginsWith("!"))
                {
                        TString tmp=toks[i](1,100);
                        ti->SetBranchStatus(tmp,0);
                }
                else
                        ti->SetBranchStatus(toks[i].Data(),1);
        }
        
        ti->SetEventList(el);
        
        TFile *fo = new TFile(fnameout, "RECREATE");    
        TTree *to = ti->CopyTree("");
//      to->SetEventList(el);
        
        cout <<"to "<<fnameout<<" ("<<to->GetNbranches()<<" br, "<<to->GetEntriesFast()<<" ev) "<<endl;
        
        fo->Write();
        fo->Close();
        fi->Close();
  return 0;
}