/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_13_patch3/src/L1Trigger/TextToDigi/plugins/TextToRaw.cc

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#include "L1Trigger/TextToDigi/plugins/TextToRaw.h"

// system
#include <vector>
#include <string>
#include <fstream>
#include <iostream>

// framework
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "FWCore/Utilities/interface/Exception.h"

// Raw data collection
#include "DataFormats/FEDRawData/interface/FEDRawDataCollection.h"

using std::vector;
using std::cerr;
using std::cout;
using std::endl;
using std::string;
using std::ios;

const unsigned TextToRaw::EVT_MAX_SIZE;

TextToRaw::TextToRaw(const edm::ParameterSet& iConfig) :
  fedId_(iConfig.getUntrackedParameter<int>("fedId", 745)),
  filename_(iConfig.getUntrackedParameter<std::string>("filename", "slinkOutput.txt")),
  fileEventOffset_(iConfig.getUntrackedParameter<int>("FileEventOffset", 0)),
  nevt_(0)
{
  edm::LogInfo("TextToDigi") << "Reading ASCII dump from " << filename_ << std::endl;

  //register the products
  produces<FEDRawDataCollection>();

}


TextToRaw::~TextToRaw()
{
 
   // do anything here that needs to be done at desctruction time
   // (e.g. close files, deallocate resources etc.)

}



void TextToRaw::putEmptyDigi(edm::Event& iEvent) {
  std::auto_ptr<FEDRawDataCollection> rawColl(new FEDRawDataCollection()); 
  //FEDRawData& feddata=rawColl->FEDData(fedId_);
  //feddata.data()[0] = 0;
  iEvent.put(rawColl);
}


// ------------ method called to produce the data  ------------
void
TextToRaw::produce(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  using namespace edm;
   
  // Skip event if required
  if (nevt_ < fileEventOffset_){
    putEmptyDigi(iEvent);
    nevt_++;
    return;
  } else if (nevt_==0 && fileEventOffset_<0) {
    std::string line;
    //skip first fileEventOffset input crossings 
    for(unsigned i=0; i<(unsigned)abs(fileEventOffset_); i++) {
      unsigned iline=0;
      while (getline(file_, line) && !line.empty()) {
        iline++;
        if(iline*4>=EVT_MAX_SIZE)       
          throw cms::Exception("TextToRawEventSizeOverflow")
            << "TextToRaw::produce() : "
            << " read too many lines (" << iline << ": " << line << ")" 
            << ", maximum event size is " << EVT_MAX_SIZE
            << std::endl;
      }
    }
  }
  
  nevt_++;
  
   // read file
   std::string line;
   unsigned i=0; // count 32-bit words

   // while not encountering dumb errors
   while (getline(file_, line) && !line.empty() ) {

     // bail if we reached the EVT_MAX_SIZE
     if (i*4>=EVT_MAX_SIZE) {
       throw cms::Exception("TextToRaw")
         << "Read too many lines from file. Maximum event size is " << EVT_MAX_SIZE << " lines" << std::endl;
     }

     // convert string to int
     std::istringstream iss(line);
     unsigned long d;
     iss >> std::hex >> d;

     // copy data
     for (int j=0; j<4; j++) {
       if ( (i*4+j) < EVT_MAX_SIZE ) { 
         char c = (d>>(8*j))&0xff;
         data_[i*4+j] = c;
       }
     }

     ++i;

     // bail if we reached the EVT_MAX_SIZE
     if (i>=EVT_MAX_SIZE) {
       throw cms::Exception("TextToRaw")
         << "Read too many lines from file. Maximum event size is " << EVT_MAX_SIZE << " lines" << std::endl;
     }

   }

   unsigned evtSize = i * 4;

   // create the collection
   std::auto_ptr<FEDRawDataCollection> rawColl(new FEDRawDataCollection()); 
   // retrieve the target buffer
   FEDRawData& feddata=rawColl->FEDData(fedId_);
   // Allocate space for header+trailer+payload
   feddata.resize(evtSize);

   // fill FEDRawData object
   for (unsigned i=0; i<evtSize; ++i) {
     feddata.data()[i] = data_[i];
   }

   // put the collection in the event
   iEvent.put(rawColl);
     
}


// ------------ method called once each job just before starting event loop  ------------
void 
TextToRaw::beginJob() 
{
  // open VME file
  file_.open(filename_.c_str(), std::ios::in);
  if(!file_.good()) { edm::LogInfo("TextToDigi") << "Failed to open ASCII file " << filename_ << std::endl; }
}


// ------------ method called once each job just after ending the event loop  ------------
void 
TextToRaw::endJob() {
  file_.close();
}