// ----------------------------------------------------------------------------
// $Id: LCDreadStdFile.h,v 1.2 2001/06/19 03:53:16 toshi Exp $
// ----------------------------------------------------------------------------
//
// $Log: LCDreadStdFile.h,v $
// Revision 1.2  2001/06/19 03:53:16  toshi
// Changes to allow to open multiple files and to read them separetly.
// These purpose is mainly to allow background overlay events.
//
// Revision 1.1  2001/05/10 22:06:06  toshi
// File IO (stdHEP, SIO,...) utilities.
//
//
// 
// Adapted from similar file in  Gismo 2
//  31 Mar 1999   J. Bogart  moved to Util (in libRootAppsUtil.so)

// define the HEPEVT commom
#ifndef LCDREADSTDFILE_H
#define LCDREADSTDFILE_H

//#include <assert.h>
#include "LCDEventSource.h"

extern "C"{
#include "stdhep.h"

  Double_t partchg( Int_t );
  
  int   StdHepXdrReadInit(char*, int, int);
  int   StdHepXdrReadOpen(char*, int, int);
  int   StdHepXdrRead(int*, int);
  int   StdHepXdrReadMulti(int*, int);
  int   StdHepXdrWriteInit(char*, char*, int, int);
  int   StdHepXdrWriteOpen(char*, char*, int, int);
  int   StdHepXdrWrite(int, int);
  int   StdHepXdrWriteCM(int, int);
  int   StdHepXdrWriteEvent(int, int);
  void  StdHepXdrEnd(int);
  void  StdHepZero(void);
  
#include "stdlun.h"
#include "stdcnt.h"
}



class LCDreadStdFile : public LCDEventSource {

public:
  LCDreadStdFile(); // constructor.
  LCDreadStdFile(Char_t* stdfilename, LCDEvent* event=0);  // constructor that reads from an open stream.
  ~LCDreadStdFile(); // deconstructor.

  void CleanHEPEVT() { StdHepZero(); } // Set the contents of the hepevt_ to 0.
  Int_t GetEvent(LCDEvent* event=0); // creates structure with next event.
  Int_t GetStdFileEntries() { return m_ninputfile; } // N of input files.
  Char_t* GetFileName(Int_t i); // input file name.

  Int_t MakeMcPart(LCDEvent* event=0,Int_t f_overlay=0); // creates structure with current event. if f_overlay is non zero, overlay read events.

  Int_t ReadEvent(Int_t ifile=0);  // fill the common from input file.
  Int_t ReadEventMulti(Int_t ifile=0); // Read multiple input streams

  Int_t AddStdFile(Char_t* stdfilename); // Set StdHEP file name.

private:
  Int_t   m_ninputfile ;    // N of input files (max 10).
  Char_t* m_inputfile[10];  // stdHEP file from which we read
  Int_t   m_istr[10];       // index to array idxdrstr holding stream pointer
  Bool_t  m_ownevent;       // flag; is m_event created in this class?

public:
  ClassDef(LCDreadStdFile,0) // Make McPart objects from info in stdHEP file

};

#endif