move code for LArFebHeader reading into separate function to avoid code-duplication

The LArRawDataReadingAlg and the LArRawCalibDataReadingAlg are both capable of producing a LArFebHeaderContainer out of the bytestream data they are reading.

Move the code doing so into a separate function to minimize code-duplication.

LArCalorimeter/LArCnv/LArByteStream/src/LArFebHeaderReader.cxx

+/*
+  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
+*/
+
+#include "LArRawEvent/LArFebHeader.h"
+#include "LArByteStream/LArRodBlockStructure.h"
+#include "LArFebHeaderReader.h"
+
+
+void LArFebHeaderReader::fillFebHeader(LArFebHeader* larFebHeader,           //output
+				       const LArRodBlockStructure* rodBlock, //input 
+				       const ROBFragment& rob) {             //input   
+  larFebHeader->SetFormatVersion(rob.rod_version());
+  larFebHeader->SetSourceId(rob.rod_source_id());
+  larFebHeader->SetRunNumber(rob.rod_run_no());
+  larFebHeader->SetELVL1Id(rob.rod_lvl1_id());
+  larFebHeader->SetBCId(rob.rod_bc_id());
+  larFebHeader->SetLVL1TigType(rob.rod_lvl1_trigger_type());
+  larFebHeader->SetDetEventType(rob.rod_detev_type());
+  
+  //set DSP data
+  const unsigned nsample=rodBlock->getNumberOfSamples();
+  larFebHeader->SetRodStatus(rodBlock->getStatus());
+  larFebHeader->SetDspCodeVersion(rodBlock->getDspCodeVersion()); 
+  larFebHeader->SetDspEventCounter(rodBlock->getDspEventCounter()); 
+  larFebHeader->SetRodResults1Size(rodBlock->getResults1Size()); 
+  larFebHeader->SetRodResults2Size(rodBlock->getResults2Size()); 
+  larFebHeader->SetRodRawDataSize(rodBlock->getRawDataSize()); 
+  larFebHeader->SetNbSweetCells1(rodBlock->getNbSweetCells1()); 
+  larFebHeader->SetNbSweetCells2(rodBlock->getNbSweetCells2()); 
+  larFebHeader->SetNbSamples(nsample); 
+  larFebHeader->SetOnlineChecksum(rodBlock->onlineCheckSum());
+  larFebHeader->SetOfflineChecksum(rodBlock->offlineCheckSum());
+
+  if(!rodBlock->hasControlWords()) {
+    larFebHeader->SetFebELVL1Id(rob.rod_lvl1_id());
+    larFebHeader->SetFebBCId(rob.rod_bc_id());
+  } else {
+    const uint16_t evtid = rodBlock->getCtrl1(0) & 0x1f;
+    const uint16_t bcid  = rodBlock->getCtrl2(0) & 0x1fff;
+    larFebHeader->SetFebELVL1Id(evtid);
+    larFebHeader->SetFebBCId(bcid);
+    for(int iadc=0;iadc<16;iadc++) {
+      larFebHeader->SetFebCtrl1(rodBlock->getCtrl1(iadc));
+      larFebHeader->SetFebCtrl2(rodBlock->getCtrl2(iadc));
+      larFebHeader->SetFebCtrl3(rodBlock->getCtrl3(iadc));
+    }
+    for(unsigned int i = 0; i<nsample; i++ ) {
+      larFebHeader->SetFebSCA(rodBlock->getRadd(0,i) & 0xff);
+    }
+  }//end else no control words
+
+  return;
+}