//  
//  eviocount
// 
// scans through file counting events. 

#include <memory>
#include <string>
#include <sstream>
#include <iomanip>
#include <set>
#include <vector>

#include <sys/stat.h>

#include "evioBankIndex.hxx"
#include "evioUtil.hxx"
#include "evioFileChannel.hxx"

extern "C" {
#include "evio.h"
//int swap_int32_t(uint32_t*,int,uint32_t*);
}


using namespace evio;



#define _DBG_ cerr<<__FILE__<<":"<<__LINE__<<" "
#define _DBG__ cerr<<__FILE__<<":"<<__LINE__<<endl;


//-------------------------------------------------------------------------------

//------------------
// main
//------------------
int main(int argc, char **argv) {
  
  	// Make sure user gives a filename
	if(argc<2){
		cout << endl << "Usage:\n   eviocount file.evio" << endl << endl;
		exit(EXIT_FAILURE);
	}
	
	string fname(argv[1]);
	
	// Read all events.
  try {

    // open input file channel
    evioFileChannel *chan = new evioFileChannel(fname.c_str(),"r");
    chan->open();
	 
	 cout << "Scanning " << fname << "  ..." << endl;

    // loop over all buffers in file, copy data, swap, then write
    int nev=0;
    while(chan->readNoCopy()) {
      nev++;

		if(nev%1000 == 0){
			cout << "  " << nev << " events read    \r";  cout.flush();
		}
    }
	 
	 chan->close();
	 
	 cout << endl;
	 cout << "Found " << nev << " events in file" << endl;

  } catch (evioException e) {
    cerr << e.what() << endl;
    exit(EXIT_FAILURE);
  }

	// done
	exit(EXIT_SUCCESS);
}



//-------------------------------------------------------------------------------