// $Id$

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Authors: Matthias Richter <Matthias.Richter@ift.uib.no>                *
 *          Timm Steinbeck <timm@kip.uni-heidelberg.de>                   *
 *          Jochen Thaeder <thaeder@kip.uni-heidelberg.de>                *
 *          for The ALICE Off-line Project.                               *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
// class for reading unpacked data for the HLT                               //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#if __GNUC__== 3
using namespace std;
#endif

#include "AliHLTTPCDigitReaderUnpacked.h"
#include "AliHLTTPCDigitData.h"
#include "AliHLTTPCRawDataFormat.h"

#include "AliHLTTPCLogging.h"

#include <stdlib.h>
#include <errno.h>

ClassImp(AliHLTTPCDigitReaderUnpacked)

AliHLTTPCDigitReaderUnpacked::AliHLTTPCDigitReaderUnpacked(){
  fBin = 0;
  fRow = 0;
  fFirstRow = 0;
  fLastRow = 0;
}

AliHLTTPCDigitReaderUnpacked::~AliHLTTPCDigitReaderUnpacked(){
}

int AliHLTTPCDigitReaderUnpacked::InitBlock(void* ptr,unsigned long size, Int_t firstrow, Int_t lastrow){
  AliHLTTPCUnpackedRawData *tmpptr;
  fPtr = ptr;
  fSize = size;

  tmpptr = (AliHLTTPCUnpackedRawData*) fPtr;
  fDigitRowData = (AliHLTTPCDigitRowData*) tmpptr->fDigits;
  fActRowData = (AliHLTTPCDigitRowData*) fDigitRowData;

  fBin = -1;

  fFirstRow = firstrow;
  fLastRow = lastrow;
  return 0;
  fRow = fFirstRow; 

  if ((Int_t)fActRowData->fRow != fRow){
      LOG(AliHLTTPCLog::kWarning,"AliHLTTPCDigitReaderUnpacked::Next","Digits") << "Row number should match!" << fActRowData->fRow << " " << fRow << ENDLOG;
  }
}

bool AliHLTTPCDigitReaderUnpacked::Next(){
  bool rreadvalue = true;

  fBin++;

  if ( fBin >= (Int_t)fActRowData->fNDigit ){

    fRow++;

    if ((fRow >= fFirstRow) && (fRow <= fLastRow)){

      //new row 
      Byte_t *tmp = (Byte_t*) fActRowData;
      Int_t size = sizeof(AliHLTTPCDigitRowData) + fActRowData->fNDigit*sizeof(AliHLTTPCDigitData);
      tmp += size;
      fActRowData = (AliHLTTPCDigitRowData*) tmp;
     
      if (((Byte_t*)fPtr) + fSize <= tmp){
	rreadvalue = false;
	return rreadvalue;
      }

      fBin = 0;
    }
    else {
      rreadvalue = false;
      return rreadvalue;
    }
    
    if ((Int_t)fActRowData->fRow != fRow){
      LOG(AliHLTTPCLog::kWarning,"AliHLTTPCDigitReaderUnpacked::Next","Digits") << "Row number should match!" << fActRowData->fRow << " " << fRow << ENDLOG;
    }
  }

  fData = fActRowData->fDigitData;
 
  return rreadvalue;
}

int AliHLTTPCDigitReaderUnpacked::GetRow(){
  int rrow;
  rrow = fRow;
  return rrow;
}

int AliHLTTPCDigitReaderUnpacked::GetPad(){
  int rpad;
  rpad = (int)fData[fBin].fPad;
  return rpad   ;
}

int AliHLTTPCDigitReaderUnpacked::GetSignal(){ 
  int rsignal;
  rsignal = (int)fData[fBin].fCharge;
  return rsignal;
}

int AliHLTTPCDigitReaderUnpacked::GetTime(){
  int rtime;
  rtime = (int)fData[fBin].fTime;
  return rtime;
}