event_skim.cxx File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <assert.h>
#include <signal.h>
#include <errno.h>
#include "TMidasEvent.h"
#include "TMidasFile.h"
#include <vector>

Include dependency graph for event_skim.cxx:

Go to the source code of this file.

Functions
void	HandleMidasEvent (TMidasEvent &event)
int	ProcessMidasFile (const char *fname, const char *foutname)
void	help ()
int	main (int argc, char *argv[])
Variables
int	gEventCutoff = 0

---

Function Documentation

void HandleMidasEvent

(

TMidasEvent &

event

)

Trigger word definition (64 bit unsigned long):

• Bits 0-31: Event number
• Bits 32-47: Spill number
• Bits 48-57: Trigger bits
  • Bit 48: Beam spill
  • Bit 49: Pedestal/noise
  • Bit 50: TPC laser
  • Bit 51: POD LED
  • Bit 52: ECAL LED
  • Bit 53: FGD LED
  • Bit 54: FEE calibration
  • Bit 55: TRIP-t cosmic
  • Bit 56: Reserved for FGD cosmic
  • Bit 57: unused
• Bits 58-63: Instruction
  • Bit 58: Reserved for start-of-run
  • Bit 59: Reserved for end-of-run
  • Bit 60: 1 PPS / counter reset
  • Bit 61: Go to spill mode
  • Bit 62: Go to cosmic mode
  • Bit 63: Decline CTM request/abort

Definition at line 26 of file event_skim.cxx.

{
  int eventId = event.GetEventId();
  int eventSN = event.GetSerialNumber();
  //event.Print("a");
  //event.Print();
  //  printf("EventSerial#: %i, EventID: %i\n",eventSN,eventId);

  // Look for some banks: 
  const char* fBank = "OMCM" ;
  int bankLength = 0;
  int bankType = 0;
  void *pdata = 0;

  int found = event.FindBank(fBank, &bankLength, &bankType, &pdata);
  if(found) 
    {
      if (0) {
        printf("Dumping bank %s in hex\n",fBank);
        for (int j = 0; j < bankLength; j++)
          printf("0x%08x%c", ((uint32_t*)pdata)[j], (j%10==9)?'\n':' ');
        printf("\n");
        printf("Dumping bank %s in dec\n",fBank);
        for (int j = 0; j < bankLength; j++)
          printf("  %8d%c", ((uint32_t*)pdata)[j], (j%10==9)?'\n':' ');
        printf("\n");
      }
      /// Trigger word definition (64 bit unsigned long):
      ///     - Bits  0-31:  Event number
      ///     - Bits 32-47: Spill number
      ///     - Bits 48-57: Trigger bits
      ///         - Bit 48: Beam spill
      ///         - Bit 49: Pedestal/noise
      ///         - Bit 50: TPC laser
      ///         - Bit 51: POD LED
      ///         - Bit 52: ECAL LED
      ///         - Bit 53: FGD LED
      ///         - Bit 54: FEE calibration
      ///         - Bit 55: TRIP-t cosmic
      ///         - Bit 56: Reserved for FGD cosmic
      ///         - Bit 57: unused
      ///     - Bits 58-63: Instruction
      ///         - Bit 58: Reserved for start-of-run
      ///         - Bit 59: Reserved for end-of-run
      ///         - Bit 60: 1 PPS / counter reset
      ///         - Bit 61: Go to spill mode
      ///         - Bit 62: Go to cosmic mode
      ///         - Bit 63: Decline CTM request/abort
      int eventNum = ((uint32_t*)pdata)[1];
      int spillNum = ((uint32_t*)pdata)[2] & 0xFFFF;
      int trigBits = (((uint32_t*)pdata)[2] >> 16) &  0xFFFF;
      const char* trigType = "";
      int trigBeam = 1;
      switch (trigBits) 
        {
        case 1: 
          trigType = "Beam spill";
          break;
        }
      if (trigBits == trigBeam) {
        //      printf("EventSerial#: %i, EventID: %i\n",eventSN,eventId);
        printf(" eventNum %d, spillNum %d, trigBits 0x%04x, %s\n",eventNum,spillNum,trigBits,trigType);
      }
    } else {
      printf("Can't find bank %s\n",fBank);
    }
  //printf("\n");
          
}

void help

(

)

Definition at line 189 of file event_skim.cxx.

{
  printf("\nUsage:\n");
  printf("\n./event_skim.exe [-h]  [-eMaxEvents] [file1 file2 ...]\n");
  printf("\n");
  printf("\t-h: print this help message\n");
  printf("\t-e: Number of events to read from input data files\n");
  printf("\t-o: Generate output file \n");
  printf("\n");
  printf("Example1: print events from file: ./event_skim.exe /data/alpha/current/run00500.mid.gz\n");
  printf("Example2: output selected events: ./event_skim.exe -o skim_00500.mid.gz /data/alpha/current/run00500.mid.gz\n");
  exit(1);
}

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 205 of file event_skim.cxx.

References gEventCutoff, help(), and ProcessMidasFile().

{
   setbuf(stdout,NULL);
   setbuf(stderr,NULL);
 
   signal(SIGILL,  SIG_DFL);
   signal(SIGBUS,  SIG_DFL);
   signal(SIGSEGV, SIG_DFL);
   signal(SIGPIPE, SIG_DFL);
 
   std::vector<std::string> args;
   for (int i=0; i<argc; i++)
     {
       if (strcmp(argv[i],"-h")==0)
         help(); // does not return
       args.push_back(argv[i]);
     }

   const char* outname = NULL;

   for (unsigned int i=1; i<args.size(); i++) // loop over the commandline options
     {
       const char* arg = args[i].c_str();
       //printf("argv[%d] is %s\n",i,arg);
           
       if (strncmp(arg,"-e",2)==0)  // Event cutoff flag (only applicable in offline mode)
         gEventCutoff = atoi(arg+2);
       else if (strncmp(arg,"-o",2)==0) { // Skim to output file
         outname = args[i+1].c_str();
         i++;
       }
       else if (strcmp(arg,"-h")==0)
         help(); // does not return
       else if (arg[0] == '-')
         help(); // does not return
    }
         
   for (unsigned int i=1; i<args.size(); i++)
     {
       const char* arg = args[i].c_str();

       if (arg[0] != '-')  
         {  
           ProcessMidasFile(arg, outname);
         }
     }
   
   return 0;
}

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int ProcessMidasFile	(	const char *	fname,
		const char *	foutname
	)

Definition at line 113 of file event_skim.cxx.

References TMidasFile::Close(), TMidasFile::GetLastErrno(), TMidasFile::GetLastError(), gEventCutoff, HandleMidasEvent(), TMidasFile::Open(), TMidasFile::OutClose(), TMidasFile::OutOpen(), TMidasFile::Read(), and TMidasFile::Write().

{
  TMidasFile f;
  TMidasFile fout;

  bool tryOpen = f.Open(fname);

  if (!tryOpen)
    {
      printf("Cannot open input file \"%s\"\n",fname);
      return -1;
    }

  bool tryOutOpen = fout.OutOpen(foutname);

  if (!tryOutOpen)
    {
      printf("Cannot open output file \"%s\"\n",foutname);
      printf("Last error is %d, %s\n",f.GetLastErrno(),f.GetLastError());
      printf("Exiting program\n");
      exit (1);
    }

  int i=0;
  while (1)
    {
      TMidasEvent event;
      if (!f.Read(&event))
        break;

      int eventId = event.GetEventId();
      printf("Have an event of type %d\n",eventId);

      if ((eventId & 0xFFFF) == 0x8000)
        {
          // begin run
          event.Print();
        }
      else if ((eventId & 0xFFFF) == 0x8001)
        {
          // end run
          event.Print();
        }
      else
        {
          event.SetBankList();
          //event.Print();
          HandleMidasEvent(event);
        }       
      if((i%500)==0)
        {
          printf("Processing event %d\n",i);
        }
      
      i++;
      if ((gEventCutoff!=0)&&(i>=gEventCutoff))
        {
          printf("Reached event %d, exiting loop.\n", i);
          break;
        }
      // Output all events
      if (!fout.Write(&event)) {
        printf("Error writing event to output\n");
        break;
      }
      printf("Event written to out\n");

    }
  
  f.Close();
  fout.OutClose();

  return 0;
}

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Variable Documentation

int gEventCutoff = 0

Definition at line 23 of file event_skim.cxx.