/data/refman/pasoursint/CMSSW_4_1_8_patch9/src/GeneratorInterface/Pythia8Interface/src/LHAupLesHouches.cc

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#include <algorithm>
#include <iostream>
#include <iterator>
#include <sstream>
#include <string>
#include <memory>
#include <assert.h>

#include "GeneratorInterface/Pythia8Interface/interface/LHAupLesHouches.h"

using namespace Pythia8;


bool LHAupLesHouches::setInit()
{
        if (!runInfo)
                return false;
        const lhef::HEPRUP &heprup = *runInfo->getHEPRUP();

        setBeamA(heprup.IDBMUP.first, heprup.EBMUP.first,
                 heprup.PDFGUP.first, heprup.PDFSUP.first);
        setBeamB(heprup.IDBMUP.second, heprup.EBMUP.second,
                 heprup.PDFGUP.second, heprup.PDFSUP.second);
        setStrategy(heprup.IDWTUP);

        for(int i = 0; i < heprup.NPRUP; i++)
                addProcess(heprup.LPRUP[i], heprup.XSECUP[i],
                           heprup.XERRUP[i], heprup.XMAXUP[i]);

//      hadronisation->onInit().emit();

//      runInfo.reset();
        return true;
}

bool LHAupLesHouches::setEvent(int inProcId)
{
        if (!event)
                return false;
        const lhef::HEPEUP &hepeup = *event->getHEPEUP();

        setProcess(hepeup.IDPRUP, hepeup.XWGTUP, hepeup.SCALUP,
                   hepeup.AQEDUP, hepeup.AQCDUP);

        for(int i = 0; i < hepeup.NUP; i++)
                addParticle(hepeup.IDUP[i], hepeup.ISTUP[i],
                            hepeup.MOTHUP[i].first, hepeup.MOTHUP[i].second,
                            hepeup.ICOLUP[i].first, hepeup.ICOLUP[i].second,
                            hepeup.PUP[i][0], hepeup.PUP[i][1],
                            hepeup.PUP[i][2], hepeup.PUP[i][3],
                            hepeup.PUP[i][4], hepeup.VTIMUP[i],
                            hepeup.SPINUP[i]);

        const lhef::LHEEvent::PDF *pdf = event->getPDF();
        if (pdf) {
          this->setPdf(pdf->id.first, pdf->id.second,
                       pdf->x.first, pdf->x.second,
                       pdf->scalePDF,
                       pdf->xPDF.first, pdf->xPDF.second, true);
        }
        else {
          this->setPdf(hepeup.IDUP[0], hepeup.IDUP[1],
                       hepeup.PUP[0][3] / runInfo->getHEPRUP()->EBMUP.first,
                       hepeup.PUP[1][3] / runInfo->getHEPRUP()->EBMUP.second,
                       0., 0., 0., false);
        }

//      hadronisation->onBeforeHadronisation().emit();

//      event.reset();
        return true;
}