AliFMDAltroIO.h

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#ifndef ALIFMDALTROIO_H
#define ALIFMDALTROIO_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights
 * reserved. 
 *
 * Latest changes by Christian Holm Christensen <cholm@nbi.dk>
 *
 * See cxx source for full Copyright notice                               
 */
#include <iosfwd>
#include <TObject.h>

//____________________________________________________________________
class AliFMDAltroIO  : public TObject
{
public:
  typedef long long W40_t;
  typedef Int_t W10_t;
  AliFMDAltroIO();
  virtual ~AliFMDAltroIO() {}
  enum {
    kNoError,
    kBadFile,
    kBadBits, 
    kBadRead, 
    kBadWrite, 
    kBadSeek, 
    kBadTell, 
    kBadTrailer, 
    kBadFill
  };
  static const W40_t  fgkTrailerMask;
  const char* ErrorString(Int_t err)  const;
protected:
  W40_t fBuffer;
  Int_t fIBuffer;

  virtual W40_t ConcatW40(size_t n, const W10_t& w) const;
  virtual W10_t ExtractW10(size_t n, const W40_t w) const;

  ClassDef(AliFMDAltroIO,0);
};

//____________________________________________________________________
class AliFMDAltroReader : public AliFMDAltroIO
{
public:
  AliFMDAltroReader(std::istream& stream);
  virtual ~AliFMDAltroReader() {}
  Int_t ReadChannel(UShort_t& board, UShort_t& chip, UShort_t& channel, 
                    UShort_t& last,  UShort_t* data);
  Int_t ReadChannel(UShort_t& hwaddr, UShort_t& last, UShort_t* data);
  Int_t ExtractTrailer(UShort_t& hwaddr, UShort_t& last);
  Int_t ExtractBunches(UShort_t last, UShort_t* data);
  Int_t ExtractFillWords(UShort_t last);
  Int_t ExtractBunch(UShort_t* data);
  Bool_t IsTrailer(W40_t x);
  Bool_t IsBof();
protected:
  std::istream& fInput;
  // std::istream::pos_type 
  size_t fCurrent;
  size_t fBegin;
  
  virtual Int_t ReadW40();
  virtual W10_t GetNextW10();
  virtual W40_t GetNextW40();

  ClassDef(AliFMDAltroReader,0);
};

//____________________________________________________________________
class AliFMDAltroWriter : public AliFMDAltroIO
{
public:
  AliFMDAltroWriter(std::ostream& stream);
  virtual ~AliFMDAltroWriter() {}
  void SetThreshold(UShort_t threshold) { fThreshold = threshold; }
  Int_t Close();
  Int_t Flush();
  Int_t AddSignal(UShort_t adc);
  Int_t AddChannelTrailer(UShort_t board, UShort_t chip, UShort_t channel);
  Int_t AddChannelTrailer(UInt_t hwaddr);
protected:
  Int_t AddToBuffer(UShort_t x);
  Int_t AddBunchTrailer();
  Int_t AddFillWords();
  UShort_t fThreshold;
  UShort_t fTime;
  UShort_t fLength;
  UShort_t fLast;
  size_t fBegin;
  size_t fHeader;
  Long_t fTotal;
  std::ostream& fOutput;

  ClassDef(AliFMDAltroWriter,0);
};



#endif
//____________________________________________________________________
//
// Local Variables:
//   mode: C++
// End:
//
// EOF
//

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