int main( int argc, char *argv[] )
{
  LALStatus                     status = blank_status;

  UINT4                         k;
  UINT4                         kLow;
  UINT4                         kHi;
  INT4                          numPoints       = 524288;
  REAL4                         fSampling       = 2048.;
  REAL4                         fLow            = 70.;
  REAL4                         fLowInj         = 40.;
  REAL8                         deltaT          = 1./fSampling;
  REAL8                         deltaF          = fSampling / numPoints;

  REAL4                          statValue;
 
  /* vars required to make freq series */
  LIGOTimeGPS                   epoch = { 0, 0 };
  LIGOTimeGPS                   gpsStartTime = {0, 0}; 
  REAL8                         f0 = 0.;
  REAL8                         offset = 0.;
  INT8                          waveformStartTime = 0;

  /* files contain PSD info */
  CHAR                         *injectionFile = NULL;         
  CHAR                         *outputFile    = NULL;         
  CHAR                         *specFileH1    = NULL;         
  CHAR                         *specFileH2    = NULL;         
  CHAR                         *specFileL1    = NULL;         

  COMPLEX8Vector               *unity = NULL;
  const LALUnit strainPerCount = {0,{0,0,0,0,0,1,-1},{0,0,0,0,0,0,0}};

  int                           numInjections = 0;
  int                           numTriggers = 0;

  /* template bank simulation variables */
  INT4                         injSimCount = 0;
  SimInspiralTable            *injectionHead  = NULL;
  SimInspiralTable            *thisInjection  = NULL;
  SnglInspiralTable           *snglHead       = NULL;
  SearchSummaryTable          *searchSummHead = NULL;
  /*SummValueTable              *summValueHead  = NULL;    */

  /* raw input data storage */
  REAL8FrequencySeries          *specH1        = NULL;
  REAL8FrequencySeries          *specH2        = NULL;
  REAL8FrequencySeries          *specL1        = NULL;
  REAL8FrequencySeries          *thisSpec      = NULL;
  COMPLEX8FrequencySeries       *resp          = NULL;
  COMPLEX8FrequencySeries       *detTransDummy = NULL;
  REAL4TimeSeries               *chan          = NULL;
  RealFFTPlan                   *pfwd          = NULL;
  COMPLEX8FrequencySeries       *fftData       = NULL;
  REAL8                          thisSnrsq     = 0;
  REAL8                          thisSnr       = 0;
  REAL8                          thisCombSnr   = 0;
  REAL8                          snrVec[3];
  REAL8                          dynRange      = 1./(3.0e-23);

  /* needed for inj */
  CoherentGW                 waveform;
  PPNParamStruc              ppnParams;
  DetectorResponse           detector;
  InterferometerNumber       ifoNumber   = LAL_UNKNOWN_IFO;

  /* output data */
  LIGOLwXMLStream       xmlStream;
  MetadataTable         proctable;
  MetadataTable         outputTable;
  MetadataTable         procparams;
  CHAR                  fname[256];         
  CHAR                  comment[LIGOMETA_COMMENT_MAX];
  ProcessParamsTable   *this_proc_param = NULL;

  CHAR   chanfilename[FILENAME_MAX];

  REAL4 sum = 0;
  REAL4 bitten_H1 = 0;
  REAL4 bitten_H2 = 0;
  REAL4 thisCombSnr_H1H2 = 0;

  /* create the process and process params tables */
  proctable.processTable = (ProcessTable *) calloc( 1, sizeof(ProcessTable) );
  XLALGPSTimeNow(&(proctable.processTable->start_time));
  XLALPopulateProcessTable(proctable.processTable, PROGRAM_NAME, lalAppsVCSIdentId,
      lalAppsVCSIdentStatus, lalAppsVCSIdentDate, 0);
  this_proc_param = procparams.processParamsTable = (ProcessParamsTable *) 
                                      calloc( 1, sizeof(ProcessParamsTable) );
  memset( comment, 0, LIGOMETA_COMMENT_MAX * sizeof(CHAR) );

  /* look at input args, write process params where required */
  while ( 1 )
  {

  /* getopt arguments */
  static struct option long_options[] =
  {
    /* these options set a flag */
    /* these options do not set a flag */
    {"help",                    no_argument,       0,                'h'},
    {"verbose",                 no_argument,       &vrbflg,           1 },
    {"version",                 no_argument,       0,                'V'},
    {"spectrum-H1",             required_argument, 0,                'a'},
    {"spectrum-H2",             required_argument, 0,                'b'},
    {"spectrum-L1",             required_argument, 0,                'c'},
    {"inj-file",                required_argument, 0,                'd'},
    {"comment",                 required_argument, 0,                'e'},
    {"output-file",             required_argument, 0,                'f'},
    {"coire-flag",              no_argument,       &coireflg,         1 },
    {"ligo-srd",                no_argument,       &ligosrd,          1 },
    {"write-chan",              no_argument,       &writechan,        1 },
    {"inject-overhead",         no_argument,       &injoverhead,      1 },
    {"f-lower",                 required_argument, 0,                'g'},
    {0, 0, 0, 0}
  };
  int c;
  
  /*
   *
   * parse command line arguments
   *
   */

    /* getopt_long stores long option here */
    int option_index = 0;
    size_t optarg_len;

    c = getopt_long_only( argc, argv, "a:b:c:d:e:f:g:hV", long_options, &option_index );

    /* detect the end of the options */
    if ( c == - 1 )
    {
      break;
    }

    switch ( c )
    {
      case 0:
        /* if this option set a flag, do nothing else now */
        if ( long_options[option_index].flag != 0 )
        {
          break;
        }
        else
        {
          fprintf( stderr, "error parsing option %s with argument %s\n",
              long_options[option_index].name, optarg );
          exit( 1 );
        }
        break;

      case 'h':
        fprintf( stderr, USAGE );
        exit( 0 );
        break;

      case 'a':
        /* create storage for the spectrum file name */
        optarg_len = strlen( optarg ) + 1;
        specFileH1 = (CHAR *) calloc( optarg_len, sizeof(CHAR));
        memcpy( specFileH1, optarg, optarg_len );
        ADD_PROCESS_PARAM( "string", "%s", optarg );
        break;

      case 'b':
        /* create storage for the spectrum file name */
        optarg_len = strlen( optarg ) + 1;
        specFileH2 = (CHAR *) calloc( optarg_len, sizeof(CHAR));
        memcpy( specFileH2, optarg, optarg_len );
        ADD_PROCESS_PARAM( "string", "%s", optarg );
        break;

      case 'c':
        /* create storage for the spectrum file name */
        optarg_len = strlen( optarg ) + 1;
        specFileL1 = (CHAR *) calloc( optarg_len, sizeof(CHAR));
        memcpy( specFileL1, optarg, optarg_len );
        ADD_PROCESS_PARAM( "string", "%s", optarg );
        break;

      case 'd':
        /* create storage for the injection file name */
        optarg_len = strlen( optarg ) + 1;
        injectionFile = (CHAR *) calloc( optarg_len, sizeof(CHAR));
        memcpy( injectionFile, optarg, optarg_len );
        ADD_PROCESS_PARAM( "string", "%s", optarg );
        break;

      case 'f':
        /* create storage for the output file name */
        optarg_len = strlen( optarg ) + 1;
        outputFile = (CHAR *) calloc( optarg_len, sizeof(CHAR));
        memcpy( outputFile, optarg, optarg_len );
        ADD_PROCESS_PARAM( "string", "%s", optarg );
        break;
    
      case 'g':
        fLow = (INT4) atof( optarg );
        if ( fLow < 40 )
        {
          fprintf( stderr, "invalid argument to --%s:\n"
              "f-lower must be > 40Hz (%e specified)\n",
              long_options[option_index].name, fLow );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "float", "%e", fLow );
        break;


     case 'e':
        if ( strlen( optarg ) > LIGOMETA_COMMENT_MAX - 1 )
        {
          fprintf( stderr, "invalid argument to --%s:\n"
              "comment must be less than %d characters\n",
              long_options[option_index].name, LIGOMETA_COMMENT_MAX );
          exit( 1 );
        }
        else
        {
          snprintf( comment, LIGOMETA_COMMENT_MAX, "%s", optarg);
        }
        break;

      case 'V':
        /* print version information and exit */
        fprintf( stdout, "calculation of expected SNR of injections\n"
            "Gareth Jones\n");
        XLALOutputVersionString(stderr, 0);
        exit( 0 );
        break;

     default:
        fprintf( stderr, "unknown error while parsing options\n" );
        fprintf( stderr, USAGE );
        exit( 1 );
    }
  }  

  if ( optind < argc )
  {
    fprintf( stderr, "extraneous command line arguments:\n" );
    while ( optind < argc )
    {
      fprintf ( stderr, "%s\n", argv[optind++] );
    }
    exit( 1 );
  }

  /* check the input arguments */
  if ( injectionFile == NULL )
  {
    fprintf( stderr, "Must specify the --injection-file\n" );
    exit( 1 );
  }

  if ( outputFile == NULL )
  {
    fprintf( stderr, "Must specify the --output-file\n" );
    exit( 1 );
  }

  if ( !ligosrd && specFileH1 == NULL )
  {
    fprintf( stderr, "Must specify the --spectrum-H1\n" );
    exit( 1 );
  }

  if ( !ligosrd && specFileH2 == NULL )
  {
    fprintf( stderr, "Must specify the --spectrum-H2\n" );
    exit( 1 );
  }

  if ( !ligosrd && specFileL1 == NULL )
  {
    fprintf( stderr, "Must specify the --spectrum-L1\n" );
    exit( 1 );
  }

  if ( ligosrd && (specFileH1 || specFileH2 || specFileL1 ))
  {
    fprintf( stdout, "WARNING: using LIGOI SRD power spectral density \n" );
  } 
 
  if ( vrbflg ){
    fprintf( stdout, "injection file is %s\n", injectionFile );
    fprintf( stdout, "output file is %s\n", outputFile );
    fprintf( stdout, "H1 spec file is   %s\n", specFileH1 );
    fprintf( stdout, "H2 spec file is   %s\n", specFileH2 );
    fprintf( stdout, "L1 spec file is   %s\n", specFileL1 );
  }

  /* create vector for H1, H2 and L1 spectrums */
  specH1 = XLALCreateREAL8FrequencySeries ( "",&epoch, f0, deltaF, &lalADCCountUnit, (numPoints / 2 + 1) );
  specH2 = XLALCreateREAL8FrequencySeries ( "",&epoch, f0, deltaF, &lalADCCountUnit, (numPoints / 2 + 1) );
  specL1 = XLALCreateREAL8FrequencySeries ( "",&epoch, f0, deltaF, &lalADCCountUnit, (numPoints / 2 + 1) );
  if (!specH1 || !specH2 || !specL1){
    XLALDestroyREAL8FrequencySeries ( specH1 );
    XLALDestroyREAL8FrequencySeries ( specH2 );
    XLALDestroyREAL8FrequencySeries ( specL1 );
    XLALPrintError("failure allocating H1, H2 and L1 spectra");
    exit(1);
  }

  if (!ligosrd){
    /* read in H1 spectrum */ 
    LAL_CALL( LALDReadFrequencySeries(&status, specH1, specFileH1), &status );
    if ( vrbflg ){
       fprintf( stdout, "read in H1 spec file\n" );
       fflush( stdout );
    } 

    /* read in H2 spectrum */ 
    LAL_CALL( LALDReadFrequencySeries(&status, specH2, specFileH2), &status );
    if ( vrbflg ){
       fprintf( stdout, "read in H2 spec file\n" );
       fflush( stdout );
    }

    /* read in L1 spectrum */ 
    LAL_CALL( LALDReadFrequencySeries(&status, specL1, specFileL1), &status );
    if ( vrbflg ){
       fprintf( stdout, "read in L1 spec file\n" );
       fflush( stdout );
     }
  }

  chan = XLALCreateREAL4TimeSeries( "", &epoch, f0, deltaT, 
                                     &lalADCCountUnit, numPoints );
  if ( !chan ){
    XLALPrintError("failure allocating chan");
    exit(1);
  }

  /*
   *
   * set up the response function
   *
   */
  resp = XLALCreateCOMPLEX8FrequencySeries( chan->name, 
     &chan->epoch, f0, deltaF, &strainPerCount, (numPoints / 2 + 1) );
  if ( !resp ){
    XLALPrintError("failure allocating response function");
    exit(1);
  }

  /* create vector that will contain detector.transfer info, since this 
   * is constant I calculate it once outside of all the loops and pass it 
   * in to detector.transfer when required 
   */
  detTransDummy = XLALCreateCOMPLEX8FrequencySeries( chan->name, &chan->epoch,
                  f0, deltaF, &strainPerCount, (numPoints / 2 + 1) );
  if ( !detTransDummy ){
    XLALPrintError("failure allocating detector.transfer info");
    exit(1);
  }

  /* invert the response function to get the transfer function */
  unity = XLALCreateCOMPLEX8Vector( resp->data->length );
  for ( k = 0; k < unity->length; ++k )
     {
        unity->data[k] = 1.0;
     }

  /* set response */
  for ( k = 0; k < resp->data->length; ++k )
  {
      resp->data->data[k] = 1.0;
  }

  XLALCCVectorDivide( detTransDummy->data, unity, resp->data );
  XLALDestroyCOMPLEX8Vector( unity );

  /* read in injections from injection file */
  /* set endtime to 0 so that we read in all events */
  if ( vrbflg ) fprintf( stdout, "Reading sim_inspiral table of %s\n", injectionFile );
  LAL_CALL(numInjections = SimInspiralTableFromLIGOLw( &injectionHead, injectionFile, 0, 0), &status);
  if ( vrbflg ) fprintf( stdout, "Read %d injections from sim_inspiral table of %s\n", 
                                    numInjections, injectionFile );

  if (coireflg){
     if ( vrbflg ) fprintf( stdout, "Reading sngl_inspiral table of %s\n", injectionFile );
     LAL_CALL(numTriggers = LALSnglInspiralTableFromLIGOLw(&snglHead, injectionFile, 0, -1), &status);
     if ( vrbflg ) fprintf( stdout, "Read %d triggers from sngl_inspiral table of %s\n", 
                                    numTriggers, injectionFile );
     if ( vrbflg ) {
           fprintf( stdout, "Reading search_summary table of %s ...", injectionFile );
           fflush( stdout );
           }
     searchSummHead = XLALSearchSummaryTableFromLIGOLw (injectionFile);
     if ( vrbflg ) fprintf( stdout, " done\n");
  }

 /* make sure we start at head of linked list */
 thisInjection = injectionHead;

  /* setting fixed waveform injection parameters */
  memset( &ppnParams, 0, sizeof(PPNParamStruc) );
  ppnParams.deltaT   = deltaT;
  ppnParams.lengthIn = 0;
  ppnParams.ppn      = NULL;

  /* loop over injections */
  injSimCount = 0;
    
        
  do
  {
     fprintf( stdout, "injection %d/%d\n", injSimCount+1, numInjections );

     /* reset waveform structure */
     memset( &waveform, 0, sizeof(CoherentGW) );

     /* reset chan structure */
     memset( chan->data->data, 0, chan->data->length * sizeof(REAL4) );

     if (thisInjection->f_lower == 0){
        fprintf( stdout, "WARNING: f_lower in sim_inpiral = 0, ");
        fprintf( stdout, "changing this to %e\n ", fLowInj);
        thisInjection->f_lower = fLowInj;
     }

     /* create the waveform, amp, freq phase etc */
     LAL_CALL( LALGenerateInspiral(&status, &waveform, thisInjection, &ppnParams), &status);
     if (vrbflg) fprintf( stdout, "ppnParams.tc %e\n ", ppnParams.tc);

    statValue = 0.;
  
    /* calc lower index for integration */
    kLow = ceil(fLow / deltaF);
    if ( vrbflg ) {
        fprintf( stdout, "starting integration to find SNR at frequency %e ", fLow);
        fprintf( stdout, "at index %d \n", kLow);
    }
    /* calc upper index for integration */
    kHi = floor(fSampling / (2. * deltaF));
    if ( vrbflg ) {
        fprintf( stdout, "ending integration to find SNR at frequency %e ", fSampling / 2.);
        fprintf( stdout, "at index %d \n", kHi);
    }

    /* loop over ifo */
    for ( ifoNumber = 1; ifoNumber < 4; ifoNumber++ )
    {
        /* allocate memory and copy the parameters describing the freq series */
        memset( &detector, 0, sizeof( DetectorResponse ) );
        detector.site = (LALDetector *) LALMalloc( sizeof(LALDetector) );

        if (injoverhead){ 
           if ( vrbflg ) fprintf( stdout, "WARNING: perform overhead injections\n");
           /* setting detector.site to NULL causes SimulateCoherentGW to
            * perform overhead injections */  
           detector.site = NULL; 
        }
        else {
           /* if not overhead, set detector.site using ifonumber */  
           XLALReturnDetector( detector.site, ifoNumber );
        } 

        switch ( ifoNumber )
        {
        case 1:
           if ( vrbflg ) fprintf( stdout, "looking at H1 \n");
           thisSpec = specH1;
           break;
        case 2:
           if ( vrbflg ) fprintf( stdout, "looking at H2 \n");
           thisSpec = specH2;
           break;
        case 3:
           if ( vrbflg ) fprintf( stdout, "looking at L1 \n");
           thisSpec = specL1;
           break;
        default:
           fprintf( stderr, "Error: ifoNumber %d does not correspond to H1, H2 or L1: \n", ifoNumber );
           exit( 1 );
        }

        /* get the gps start time of the signal to inject */
        waveformStartTime = XLALGPSToINT8NS( &(thisInjection->geocent_end_time) );
        waveformStartTime -= (INT8) ( 1000000000.0 * ppnParams.tc );

        offset = (chan->data->length / 2.0) * chan->deltaT;
        gpsStartTime.gpsSeconds     = thisInjection->geocent_end_time.gpsSeconds - offset;
        gpsStartTime.gpsNanoSeconds = thisInjection->geocent_end_time.gpsNanoSeconds;
        chan->epoch = gpsStartTime;


       if (vrbflg) fprintf(stdout, "offset start time of injection by %f seconds \n", offset ); 
       
       /* is this okay? copying in detector transfer which so far only contains response info  */
       detector.transfer = detTransDummy;

       XLALUnitInvert( &(detector.transfer->sampleUnits), &(resp->sampleUnits) );

       /* set the start times for injection */
       XLALINT8NSToGPS( &(waveform.a->epoch), waveformStartTime );
       memcpy(&(waveform.f->epoch), &(waveform.a->epoch), sizeof(LIGOTimeGPS) );
       memcpy(&(waveform.phi->epoch), &(waveform.a->epoch), sizeof(LIGOTimeGPS) );
 
       /* perform the injection */
       LAL_CALL( LALSimulateCoherentGW(&status, chan, &waveform, &detector ), &status); 

       if (writechan){ 
          /* write out channel data */
          if (vrbflg) fprintf(stdout, "writing channel data to file... \n" ); 
          switch ( ifoNumber )
          {
          case 1:
             snprintf( chanfilename, FILENAME_MAX, "chanTest_H1_inj%d.dat", injSimCount+1);
             if (vrbflg) fprintf( stdout, "writing H1 channel time series out to %s\n", chanfilename );
             LALSPrintTimeSeries(chan, chanfilename );
             break;
          case 2:
             snprintf( chanfilename, FILENAME_MAX, "chanTest_H2_inj%d.dat", injSimCount+1);
             if (vrbflg) fprintf( stdout, "writing H2 channel time series out to %s\n", chanfilename );
             LALSPrintTimeSeries(chan, chanfilename );
             break;
          case 3:
             snprintf( chanfilename, FILENAME_MAX, "chanTest_L1_inj%d.dat", injSimCount+1);
             if (vrbflg) fprintf( stdout, "writing L1 channel time series out to %s\n", chanfilename );
             LALSPrintTimeSeries(chan, chanfilename );
             break;
         default:
             fprintf( stderr, "Error: ifoNumber %d does not correspond to H1, H2 or L1: \n", ifoNumber );
             exit( 1 );
         }  
      } 

      LAL_CALL( LALCreateForwardRealFFTPlan( &status, &pfwd, chan->data->length, 0), &status);

      fftData = XLALCreateCOMPLEX8FrequencySeries( chan->name, &chan->epoch, f0, deltaF, 
                                                   &lalDimensionlessUnit, (numPoints / 2 + 1) );
      if ( !fftData ){
        XLALPrintError("failure allocating fftData");
        exit(1);
      }
   
      LAL_CALL( LALTimeFreqRealFFT( &status, fftData, chan, pfwd ), &status);
   
      LAL_CALL( LALDestroyRealFFTPlan( &status, &pfwd ), &status);
      pfwd = NULL;

       /* compute the SNR */
       thisSnrsq = 0;
       /* avoid f=0 part of psd */  

       if (ligosrd){
          if (vrbflg) fprintf( stdout, "using LIGOI PSD \n");
          for ( k = kLow; k < kHi; k++ )
          {
           REAL8 freq;
           REAL8 sim_psd_value;
           freq = fftData->deltaF * k;
           LALLIGOIPsd( NULL, &sim_psd_value, freq ); 

           thisSnrsq += ((crealf(fftData->data->data[k]) * dynRange) * 
                      (crealf(fftData->data->data[k]) * dynRange)) / sim_psd_value;
           thisSnrsq += ((cimagf(fftData->data->data[k]) * dynRange) * 
                      (cimagf(fftData->data->data[k]) * dynRange)) / sim_psd_value;
           }
       }
       else {
          if (vrbflg) fprintf( stdout, "using input spectra \n");
          for ( k = kLow; k < kHi; k++ )
          {
           thisSnrsq += ((crealf(fftData->data->data[k]) * dynRange) * 
              (crealf(fftData->data->data[k]) * dynRange))  /
              (thisSpec->data->data[k] * dynRange * dynRange);
           thisSnrsq += ((cimagf(fftData->data->data[k]) * dynRange) * 
              (cimagf(fftData->data->data[k]) * dynRange)) /
              (thisSpec->data->data[k] * dynRange * dynRange);
        } 
      }

       thisSnrsq *= 4*fftData->deltaF;
       thisSnr    = pow(thisSnrsq, 0.5);
       /* Note indexing on snrVec, ifoNumber runs from 1..3 to get source correct,
        * we must index snrVec 0..2 
        */ 
       snrVec[ifoNumber-1] = thisSnr; 
       XLALDestroyCOMPLEX8FrequencySeries(fftData);

       if ( vrbflg ){
          fprintf( stdout, "thisSnrsq %e\n", thisSnrsq );
          fprintf( stdout, "snrVec    %e\n", snrVec[ifoNumber-1] );
          fflush( stdout );
       }

       /* sum thisSnrsq to eventually get combined snr*/
       statValue += thisSnrsq; 

       /* free some memory */
       if (detector.transfer) detector.transfer = NULL;
       if ( detector.site ) {LALFree( detector.site); detector.site = NULL;}
     }
     /* end loop over ifo */
  
    destroyCoherentGW( &waveform );

    /* store inverse eff snrs in eff_dist columns */
    thisInjection->eff_dist_h = 1./snrVec[0];
    thisInjection->eff_dist_g = 1./snrVec[1];
    thisInjection->eff_dist_l = 1./snrVec[2];

    /* store inverse sum of squares snr in eff_dist_t */
    thisCombSnr = pow(statValue, 0.5);
    if ( vrbflg ) fprintf( stdout, "thisCombSnr %e\n", thisCombSnr);
    thisInjection->eff_dist_t = 1./thisCombSnr;

    /* calc inverse bittenL snr for H1H2 and store in eff_dist_v */
    thisCombSnr_H1H2 = 0.;
    sum = snrVec[0] * snrVec[0] + snrVec[1] * snrVec[1];
    bitten_H1 = 3 * snrVec[0] -3;
    bitten_H2 = 3 * snrVec[1] -3;

    if (sum < bitten_H1){
       thisCombSnr_H1H2 = sum;
    }
    else
    {
       thisCombSnr_H1H2 = bitten_H1;
    }

    if (bitten_H2 < thisCombSnr_H1H2){
       thisCombSnr_H1H2 = bitten_H2;
    }
    thisInjection->eff_dist_v = 1./thisCombSnr_H1H2;


    /* increment the bank sim sim_inspiral table if necessary */
    if ( injectionHead )
    {
      thisInjection = thisInjection->next;
    }

  } while ( ++injSimCount < numInjections ); 
  /* end loop over injections */

  /* try opening, writing and closing an xml file */

  /* open the output xml file */
  memset( &xmlStream, 0, sizeof(LIGOLwXMLStream) );
  snprintf( fname, sizeof(fname), "%s", outputFile);
  LAL_CALL( LALOpenLIGOLwXMLFile  ( &status, &xmlStream, fname), &status);

  /* write out the process and process params tables */
  if ( vrbflg ) fprintf( stdout, "process... " );
  XLALGPSTimeNow(&(proctable.processTable->end_time));
  LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream, process_table ), &status );
  LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, proctable, process_table ), &status );
  LAL_CALL( LALEndLIGOLwXMLTable ( &status, &xmlStream ), &status );
  free( proctable.processTable );
  /* Just being pedantic here ... */
  proctable.processTable = NULL;
 
  /* free the unused process param entry */
  this_proc_param = procparams.processParamsTable;
  procparams.processParamsTable = procparams.processParamsTable->next;
  free( this_proc_param );
  this_proc_param = NULL;

  /* write the process params table */
  if ( vrbflg ) fprintf( stdout, "process_params... " );
  LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream, process_params_table ), &status );
  LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, procparams, process_params_table ), &status );
  LAL_CALL( LALEndLIGOLwXMLTable ( &status, &xmlStream ), &status );

  /* write the search summary table */
  if ( coireflg ){
     if ( vrbflg ) fprintf( stdout, "search_summary... " );
     outputTable.searchSummaryTable = searchSummHead;
     LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream, search_summary_table), &status);
     LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, outputTable, search_summary_table), &status);
     LAL_CALL( LALEndLIGOLwXMLTable  ( &status, &xmlStream), &status);
   }

  /* write the sim inspiral table */
  if ( vrbflg ) fprintf( stdout, "sim_inspiral... " );
  outputTable.simInspiralTable = injectionHead;
  LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream, sim_inspiral_table), &status);
  LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, outputTable, sim_inspiral_table), &status);
  LAL_CALL( LALEndLIGOLwXMLTable  ( &status, &xmlStream), &status);

  /* write the sngl inspiral table */
  if ( coireflg ){
     if ( vrbflg ) fprintf( stdout, "sngl_inspiral... " );
     outputTable.snglInspiralTable = snglHead;
     LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream, sngl_inspiral_table), &status);
     LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, outputTable, sngl_inspiral_table), &status);
     LAL_CALL( LALEndLIGOLwXMLTable  ( &status, &xmlStream), &status);
  } 

  /* close the xml file */ 
  LAL_CALL( LALCloseLIGOLwXMLFile ( &status, &xmlStream), &status);

  /* Freeing memory */
  XLALDestroyREAL4TimeSeries(chan);
  XLALDestroyCOMPLEX8FrequencySeries(resp);
  XLALDestroyCOMPLEX8FrequencySeries(detTransDummy);
  XLALDestroyREAL8FrequencySeries ( specH1 );
  XLALDestroyREAL8FrequencySeries ( specH2 );
  XLALDestroyREAL8FrequencySeries ( specL1 );


  free( specFileH1 );
  specFileH1 = NULL;
  free( specFileH2 );
  specFileH2 = NULL;
  free( specFileL1 );
  specFileL1 = NULL;
  free( injectionFile ); 
  injectionFile = NULL;

  /* free the process params */
  while( procparams.processParamsTable )
  {
    this_proc_param = procparams.processParamsTable;
    procparams.processParamsTable = this_proc_param->next;
    free( this_proc_param );
    this_proc_param = NULL;
  }

  /* free the sim inspiral tables */
  while ( injectionHead )
  {
    thisInjection = injectionHead;
    injectionHead = injectionHead->next;
    LALFree( thisInjection );
  }

  /*check for memory leaks */
  LALCheckMemoryLeaks(); 

  exit( 0 ); 
}
Esempio n. 2
0
int main( int argc, char *argv[] )
{
  /* lal initialization variables */
  LALStatus status = blank_status;

  /*  program option variables */
  CHAR *userTag = NULL;
  CHAR comment[LIGOMETA_COMMENT_MAX];
  char *ifos = NULL;
  char *ifoName = NULL;
  char *outputFileName = NULL;
  char *summFileName = NULL;
  char *injectFileName = NULL;
  char *vetoFileName = NULL;
  char *missedFileName = NULL;
  REAL4 snrStar = -1;
  REAL4 rsqVetoThresh = -1;
  REAL4 rsqMaxSnr     = -1;
  REAL4 rsqAboveSnrCoeff = -1;
  REAL4 rsqAboveSnrPow     = -1;
  LALSegList vetoSegs;
  MultiInspiralClusterChoice clusterchoice = no_statistic;
  INT8 cluster_dt = -1;
  INT8 injectWindowNS = -1;
  int j;
  FILE *fp = NULL;
  int numInFiles = 0;

  UINT8 triggerInputTimeNS = 0;

  MetadataTable         proctable;
  MetadataTable         procparams;
  ProcessParamsTable   *this_proc_param;

  SimInspiralTable     *simEventHead = NULL;
  SimInspiralTable     *thisSimEvent = NULL;
  SimInspiralTable     *missedSimHead = NULL;
  SimInspiralTable     *tmpSimEvent = NULL;

  SearchSummvarsTable  *inputFiles = NULL;

  SearchSummaryTable   *searchSummList = NULL;
  SearchSummaryTable   *thisSearchSumm = NULL;
  SummValueTable       *summValueList = NULL;

  int                   extractSlide = 0;
  int                   numSlides = 0;
  int                   numEvents = 0;
  int                   numEventsKept = 0;
  int                   numEventsInIFO = 0;
  int                   numEventsAboveSNRThresh = 0;
  int                   numEventsBelowRsqThresh = 0;
  int                   numEventsSurvivingVeto = 0;
  int                   numClusteredEvents = 0;
  int                   numEventsInIfos = 0;

  int                   numSimEvents = 0;
  int                   numSimInData = 0;
  int                   numSimFound  = 0;
  int                   numMultiFound  = 0;

  MultiInspiralTable   *missedHead = NULL;
  MultiInspiralTable   *thisEvent = NULL;
  MultiInspiralTable   *thisInspiralTrigger = NULL;
  MultiInspiralTable   *inspiralEventList = NULL;
  MultiInspiralTable   *slideEvent = NULL;

  LIGOLwXMLStream       xmlStream;
  MetadataTable         outputTable;
  MetadataTable         UNUSED savedEvents;
  MetadataTable         searchSummvarsTable;

  /*
   *
   * initialization
   *
   */


  /* set up inital debugging values */
  lal_errhandler = LAL_ERR_EXIT;

  /* create the process and process params tables */
  proctable.processTable = (ProcessTable *)
    calloc( 1, sizeof(ProcessTable) );
  XLALGPSTimeNow(&(proctable.processTable->start_time));
  XLALPopulateProcessTable(proctable.processTable, PROGRAM_NAME, lalAppsVCSIdentId,
      lalAppsVCSIdentStatus, lalAppsVCSIdentDate, 0);
  this_proc_param = procparams.processParamsTable = (ProcessParamsTable *)
    calloc( 1, sizeof(ProcessParamsTable) );
  memset( comment, 0, LIGOMETA_COMMENT_MAX * sizeof(CHAR) );

  savedEvents.multiInspiralTable = NULL;


  /*
   *
   * parse command line arguments
   *
   */


  while (1)
  {
    /* LALgetopt arguments */
    static struct LALoption long_options[] =
    {
      {"verbose",             no_argument,           &vrbflg,              1 },
      {"sort-triggers",       no_argument,     &sortTriggers,              1 },
      {"help",                    no_argument,            0,              'h'},
      {"user-tag",                required_argument,      0,              'Z'},
      {"userTag",                 required_argument,      0,              'Z'},
      {"comment",                 required_argument,      0,              'c'},
      {"version",                 no_argument,            0,              'V'},
      {"data-type",               required_argument,      0,              'k'},
      {"output",                  required_argument,      0,              'o'},
      {"summary-file",            required_argument,      0,              'S'},
      {"extract-slide",           required_argument,      0,              'e'},
      {"num-slides",              required_argument,      0,              'N'},
      {"snr-threshold",           required_argument,      0,              's'},
      {"rsq-threshold",           required_argument,      0,              'r'},
      {"rsq-max-snr",             required_argument,      0,              'R'},
      {"rsq-coeff",               required_argument,      0,              'p'},
      {"rsq-power",               required_argument,      0,              'P'},
      {"cluster-algorithm",       required_argument,      0,              'C'},
      {"cluster-time",            required_argument,      0,              't'},
      {"ifo-cut",                 required_argument,      0,              'd'},
      {"coinc-cut",               required_argument,      0,              'D'},
      {"veto-file",               required_argument,      0,              'v'},
      {"injection-file",          required_argument,      0,              'I'},
      {"injection-window",        required_argument,      0,              'T'},
      {"missed-injections",       required_argument,      0,              'm'},
      {0, 0, 0, 0}
    };
    int c;

    /* LALgetopt_long stores the option index here. */
    int option_index = 0;
    size_t LALoptarg_len;

    c = LALgetopt_long_only ( argc, argv,
        "c:d:D:hj:k:m:o:r:s:t:v:C:DH:I:R:ST:VZ:",
        long_options, &option_index );

    /* detect the end of the options */
    if ( c == - 1 )
      break;

    switch ( c )
    {
      case 0:
        /* if this option set a flag, do nothing else now */
        if ( long_options[option_index].flag != 0 )
        {
          break;
        }
        else
        {
          fprintf( stderr, "error parsing option %s with argument %s\n",
              long_options[option_index].name, LALoptarg );
          exit( 1 );
        }
        break;

      case 'h':
        print_usage(argv[0]);
        exit( 0 );
        break;

      case 'Z':
        /* create storage for the usertag */
        LALoptarg_len = strlen( LALoptarg ) + 1;
        userTag = (CHAR *) calloc( LALoptarg_len, sizeof(CHAR) );
        memcpy( userTag, LALoptarg, LALoptarg_len );

        this_proc_param = this_proc_param->next = (ProcessParamsTable *)
          calloc( 1, sizeof(ProcessParamsTable) );
        snprintf( this_proc_param->program, LIGOMETA_PROGRAM_MAX, "%s",
            PROGRAM_NAME );
        snprintf( this_proc_param->param, LIGOMETA_PARAM_MAX, "-userTag" );
        snprintf( this_proc_param->type, LIGOMETA_TYPE_MAX, "string" );
        snprintf( this_proc_param->value, LIGOMETA_VALUE_MAX, "%s",
            LALoptarg );
        break;

      case 'c':
        if ( strlen( LALoptarg ) > LIGOMETA_COMMENT_MAX - 1 )
        {
          fprintf( stderr, "invalid argument to --%s:\n"
              "comment must be less than %d characters\n",
              long_options[option_index].name, LIGOMETA_COMMENT_MAX );
          exit( 1 );
        }
        else
        {
          snprintf( comment, LIGOMETA_COMMENT_MAX, "%s", LALoptarg);
        }
        break;

      case 'V':
        fprintf( stdout, "Coherent Inspiral Reader and Injection Analysis\n"
            "Sukanta Bose\n");
        XLALOutputVersionString(stderr, 0);
        exit( 0 );
        break;

      case 'o':
        /* create storage for the output file name */
        LALoptarg_len = strlen( LALoptarg ) + 1;
        outputFileName = (CHAR *) calloc( LALoptarg_len, sizeof(CHAR));
        memcpy( outputFileName, LALoptarg, LALoptarg_len );
        ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        break;

      case 'e':
        /* store the number of slides */
        extractSlide = atoi( LALoptarg );
        if ( extractSlide == 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "extractSlide must be non-zero: "
              "(%d specified)\n",
              long_options[option_index].name, extractSlide );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "int", "%d", extractSlide );
        break;

      case 'N':
        /* store the number of slides */
        numSlides = atoi( LALoptarg );
        if ( numSlides < 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "numSlides >= 0: "
              "(%d specified)\n",
              long_options[option_index].name, numSlides );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "int", "%d", numSlides );
        break;

      case 'S':
        /* create storage for the summ file name */
        LALoptarg_len = strlen( LALoptarg ) + 1;
        summFileName = (CHAR *) calloc( LALoptarg_len, sizeof(CHAR));
        memcpy( summFileName, LALoptarg, LALoptarg_len );
        ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        break;

      case 'k':
        /* type of data to analyze */
        if ( ! strcmp( "playground_only", LALoptarg ) )
        {
          dataType = playground_only;
        }
        else if ( ! strcmp( "exclude_play", LALoptarg ) )
        {
          dataType = exclude_play;
        }
        else if ( ! strcmp( "all_data", LALoptarg ) )
        {
          dataType = all_data;
        }
        else
        {
          fprintf( stderr, "invalid argument to --%s:\n"
              "unknown data type, %s, specified: "
              "(must be playground_only, exclude_play or all_data)\n",
              long_options[option_index].name, LALoptarg );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        break;

      case 's':
        snrStar = (REAL4) atof( LALoptarg );
        if ( snrStar < 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "threshold must be >= 0: "
              "(%f specified)\n",
              long_options[option_index].name, snrStar );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "float", "%e", snrStar );
        break;

      case 'r':
        rsqVetoThresh = (REAL4) atof( LALoptarg );
        if ( rsqVetoThresh < 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "threshold must be >= 0: "
              "(%f specified)\n",
              long_options[option_index].name, rsqVetoThresh );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "float", "%e", rsqVetoThresh );
        break;

      case 'R':
        rsqMaxSnr = (REAL4) atof( LALoptarg );
        if ( rsqMaxSnr < 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "threshold must be >= 0: "
              "(%f specified)\n",
              long_options[option_index].name, rsqMaxSnr );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "float", "%e", rsqMaxSnr );
        break;

      case 'p':
        rsqAboveSnrCoeff = (REAL4) atof( LALoptarg );
        if ( rsqAboveSnrCoeff < 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "coefficient must be >= 0: "
              "(%f specified)\n",
              long_options[option_index].name, rsqAboveSnrCoeff );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "float", "%e", rsqAboveSnrCoeff );
        break;

      case 'P':
        rsqAboveSnrPow = (REAL4) atof( LALoptarg );
        if ( rsqAboveSnrPow < 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "power must be >= 0: "
              "(%f specified)\n",
              long_options[option_index].name, rsqAboveSnrPow );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "float", "%e", rsqAboveSnrPow );
        break;

      case 'C':
        /* choose the clustering algorithm */
        {
          if ( ! strcmp( "nullstat", LALoptarg) )
          {
            clusterchoice = nullstat;
          }
          else if ( ! strcmp( "cohsnr", LALoptarg) )
          {
            clusterchoice = cohsnr;
          }
          else if ( ! strcmp( "effCohSnr", LALoptarg) )
          {
            clusterchoice = effCohSnr;
          }
          else if ( ! strcmp( "snrByNullstat", LALoptarg) )
          {
            clusterchoice = snrByNullstat;
          }
          else if ( ! strcmp( "autoCorrCohSqByNullstat", LALoptarg) )
          {
            clusterchoice = autoCorrCohSqByNullstat;
          }
          else if ( ! strcmp( "crossCorrCohSqByNullstat", LALoptarg) )
          {
            clusterchoice = autoCorrCohSqByNullstat;
          }
          else if ( ! strcmp( "autoCorrNullSqByNullstat", LALoptarg) )
          {
            clusterchoice = autoCorrCohSqByNullstat;
          }
          else if ( ! strcmp( "crossCorrNullSqByNullstat", LALoptarg) )
          {
            clusterchoice = crossCorrCohSqByNullstat;
          }
          else
          {
            fprintf( stderr, "invalid argument to  --%s:\n"
                "unknown clustering specified:\n "
                "%s (must be one of: cohsnr, effCohSnr, nullstat, snrByNullstat, autoCorrCohSqByNullstat, \n"
                "crossCorrCohSqByNullstat, autoCorrNullSqByNullstat, or crossCorrNullSqByNullstat)\n",
                long_options[option_index].name, LALoptarg);
            exit( 1 );
          }
          ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        }
        break;

      case 't':
        /* cluster time is specified on command line in ms */
        cluster_dt = (INT8) atoi( LALoptarg );
        if ( cluster_dt <= 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "cluster window must be > 0: "
              "(%" LAL_INT8_FORMAT " specified)\n",
              long_options[option_index].name, cluster_dt );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "int", "%" LAL_INT8_FORMAT, cluster_dt );
        /* convert cluster time from ms to ns */
        cluster_dt *= 1000000LL;
        break;

      case 'v':
        /* create storage for the injection file name */
        LALoptarg_len = strlen( LALoptarg ) + 1;
        vetoFileName = (CHAR *) calloc( LALoptarg_len, sizeof(CHAR));
        memcpy( vetoFileName, LALoptarg, LALoptarg_len );
        ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        break;

      case 'I':
        /* create storage for the injection file name */
        LALoptarg_len = strlen( LALoptarg ) + 1;
        injectFileName = (CHAR *) calloc( LALoptarg_len, sizeof(CHAR));
        memcpy( injectFileName, LALoptarg, LALoptarg_len );
        ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        break;

      case 'd':
        LALoptarg_len = strlen( LALoptarg ) + 1;
        ifoName = (CHAR *) calloc( LALoptarg_len, sizeof(CHAR));
        memcpy( ifoName, LALoptarg, LALoptarg_len );
        ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        break;

      case 'D':
        /* keep only coincs found in ifos */
        LALoptarg_len = strlen( LALoptarg ) + 1;
        ifos = (CHAR *) calloc( LALoptarg_len, sizeof(CHAR));
        memcpy( ifos, LALoptarg, LALoptarg_len );
        ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        break;

      case 'T':
        /* injection coincidence time is specified on command line in ms */
        injectWindowNS = (INT8) atoi( LALoptarg );
        if ( injectWindowNS < 0 )
        {
          fprintf( stdout, "invalid argument to --%s:\n"
              "injection coincidence window must be >= 0: "
              "(%" LAL_INT8_FORMAT " specified)\n",
              long_options[option_index].name, injectWindowNS );
          exit( 1 );
        }
        ADD_PROCESS_PARAM( "int", "%" LAL_INT8_FORMAT, injectWindowNS );
        /* convert inject time from ms to ns */
        injectWindowNS *= 1000000LL;
        break;

      case 'm':
        /* create storage for the missed injection file name */
        LALoptarg_len = strlen( LALoptarg ) + 1;
        missedFileName = (CHAR *) calloc( LALoptarg_len, sizeof(CHAR));
        memcpy( missedFileName, LALoptarg, LALoptarg_len );
        ADD_PROCESS_PARAM( "string", "%s", LALoptarg );
        break;

      case '?':
        exit( 1 );
        break;

      default:
        fprintf( stderr, "unknown error while parsing options\n" );
        exit( 1 );
    }
  }


  /*
   *
   * can use LALCalloc() / LALMalloc() from here
   *
   */


  /* don't buffer stdout if we are in verbose mode */
  if ( vrbflg ) setvbuf( stdout, NULL, _IONBF, 0 );

  /* fill the comment, if a user has specified it, or leave it blank */
  if ( ! *comment )
  {
    snprintf( proctable.processTable->comment, LIGOMETA_COMMENT_MAX, " " );
  }
  else
  {
    snprintf( proctable.processTable->comment, LIGOMETA_COMMENT_MAX,
        "%s", comment );
  }

  /* check that the output file name has been specified */
  if ( ! outputFileName )
  {
    fprintf( stderr, "--output must be specified\n" );
    exit( 1 );
  }

  /* check that Data Type has been specified */
  if ( dataType == unspecified_data_type )
  {
    fprintf( stderr, "Error: --data-type must be specified\n");
    exit(1);
  }

  /* check that if clustering is being done that we have all the options */
  if ( clusterchoice && cluster_dt < 0 )
  {
    fprintf( stderr, "--cluster-time must be specified if --cluster-algorithm "
        "is given\n" );
    exit( 1 );
  }
  else if ( ! clusterchoice && cluster_dt >= 0 )
  {
    fprintf( stderr, "--cluster-algorithm must be specified if --cluster-time "
        "is given\n" );
    exit( 1 );
  }

  /* check that if the rsq veto is being preformed,
                         we have the required options */
  if ( ( (rsqVetoThresh > 0) || (rsqMaxSnr > 0) ) && ( (rsqVetoThresh < 0)
    || (rsqMaxSnr < 0) ) )
  {
    fprintf( stderr, "--rsq-threshold and --rsq-max-snr and must be "
      "specified together" );
    exit( 1 );
  }
  else if ( (rsqAboveSnrCoeff > 0) && ( (rsqMaxSnr < 0) || (rsqVetoThresh < 0)
    || (rsqAboveSnrPow < 0) ) )
  {
    fprintf( stderr, "--rsq-max-snr --rsq-threshold and --rsq-power "
      "must be specified if --rsq-coeff is given\n" );
    exit( 1 );
  }
  else if ( (rsqAboveSnrPow > 0) && ( (rsqMaxSnr < 0) || (rsqVetoThresh < 0)
    || (rsqAboveSnrCoeff < 0) ) )
  {
    fprintf( stderr, "--rsq-max-snr --rsq-threshold and --rsq-coeff "
      "must be specified if --rsq-power is given\n" );
    exit( 1 );
  }

  /* check that we have all the options to do injections */
  if ( injectFileName && injectWindowNS < 0 )
  {
    fprintf( stderr, "--injection-coincidence must be specified if "
        "--injection-file is given\n" );
    exit( 1 );
  }
  else if ( ! injectFileName && injectWindowNS >= 0 )
  {
    fprintf( stderr, "--injection-file must be specified if "
        "--injection-coincidence is given\n" );
    exit( 1 );
  }

  if ( numSlides && extractSlide )
  {
    fprintf( stderr, "--num-slides and --extract-slide both specified\n"
        "this doesn't make sense\n" );
    exit( 1 );
  }

  /* save the sort triggers flag */
  if ( sortTriggers )
  {
    this_proc_param = this_proc_param->next = (ProcessParamsTable *)
      calloc( 1, sizeof(ProcessParamsTable) );
    snprintf( this_proc_param->program, LIGOMETA_PROGRAM_MAX, "%s",
        PROGRAM_NAME );
    snprintf( this_proc_param->param, LIGOMETA_PARAM_MAX,
        "--sort-triggers" );
    snprintf( this_proc_param->type, LIGOMETA_TYPE_MAX, "string" );
    snprintf( this_proc_param->value, LIGOMETA_VALUE_MAX, " " );
  }

  /* read in the veto file (if specified */

  if ( vetoFileName )
  {
    XLALSegListInit( &vetoSegs );
    LAL_CALL( LALSegListRead( &status, &vetoSegs, vetoFileName, NULL ),
        &status );
    XLALSegListCoalesce( &vetoSegs );
  }


  /*
   *
   * read in the input triggers from the xml files
   *
   */


  /* if we have run out of arguments on the command line, throw an error */
  if ( ! (LALoptind < argc) )
  {
    fprintf( stderr, "Error: No input trigger files specified.\n" );
    exit( 1 );
  }

  /* read in the triggers */
  for( j = LALoptind; j < argc; ++j )
  {
    INT4 numFileTriggers = 0;
    MultiInspiralTable   *inspiralFileList = NULL;
    MultiInspiralTable   *thisFileTrigger  = NULL;

    numInFiles++;

    numFileTriggers = XLALReadMultiInspiralTriggerFile( &inspiralFileList,
        &thisFileTrigger, &searchSummList, &inputFiles, argv[j] );
    numEvents += numFileTriggers;

    if (numFileTriggers < 0)
    {
      fprintf(stderr, "Error reading triggers from file %s\n",
          argv[j]);
      exit( 1 );
    }
    else
    {
      if ( vrbflg )
      {
        fprintf(stdout, "Read %d reading triggers from file %s\n",
            numFileTriggers, argv[j]);
      }
    }

    /* read the summ value table as well. */
    XLALReadSummValueFile(&summValueList, argv[j]);

    /*
     *
     *  keep only relevant triggers
     *
     */

    if( ifos )
    {
      numFileTriggers = XLALMultiInspiralIfosCut( &inspiralFileList, ifos );
      if ( vrbflg ) fprintf( stdout,
          "Kept %d coincs from %s instruments\n", numFileTriggers, ifos );
      numEventsInIfos += numFileTriggers;
    }

    /* Do playground_only or exclude_play cut */
    if ( dataType != all_data )
    {
      inspiralFileList = XLALPlayTestMultiInspiral( inspiralFileList,
          &dataType );
      /* count the triggers */
      numFileTriggers = XLALCountMultiInspiralTable( inspiralFileList );

      if ( dataType == playground_only && vrbflg ) fprintf( stdout,
          "Have %d playground triggers\n", numFileTriggers );
      else if ( dataType == exclude_play && vrbflg ) fprintf( stdout,
          "Have %d non-playground triggers\n", numFileTriggers );
    }
    numEventsKept += numFileTriggers;

    /*  Do snr cut */
    if ( snrStar > 0 )
    {
      inspiralFileList = XLALSNRCutMultiInspiral( inspiralFileList,
          snrStar );
      /* count the triggers  */
      numFileTriggers = XLALCountMultiInspiral( inspiralFileList );

      if ( vrbflg ) fprintf( stdout, "Have %d triggers after snr cut\n",
          numFileTriggers );
      numEventsAboveSNRThresh += numFileTriggers;
    }

    /* NOTE: Add vetoing:
       if ( vetoFileName )
       {
       inspiralFileList = XLALVetoMultiInspiral( inspiralFileList, &vetoSegs , ifoName);
       count the triggers
       numFileTriggers = XLALCountMultiInspiral( inspiralFileList );
       if ( vrbflg ) fprintf( stdout, "Have %d triggers after applying veto\n",
       numFileTriggers );
       numEventsSurvivingVeto += numFileTriggers;

       }
     */

    /* If there are any remaining triggers ... */
    if ( inspiralFileList )
    {
      /* add inspirals to list */
      if ( thisInspiralTrigger )
      {
        thisInspiralTrigger->next = inspiralFileList;
      }
      else
      {
        inspiralEventList = thisInspiralTrigger = inspiralFileList;
      }
      for( ; thisInspiralTrigger->next;
          thisInspiralTrigger = thisInspiralTrigger->next);
    }
  }

  for ( thisSearchSumm = searchSummList; thisSearchSumm;
      thisSearchSumm = thisSearchSumm->next )
  {
    UINT8 outPlayNS, outStartNS, outEndNS, triggerTimeNS;
    LIGOTimeGPS inPlay, outPlay;
    outStartNS = XLALGPSToINT8NS( &(thisSearchSumm->out_start_time) );
    outEndNS = XLALGPSToINT8NS( &(thisSearchSumm->out_end_time) );
    triggerTimeNS = outEndNS - outStartNS;

    /* check for events and playground */
    if ( dataType != all_data )
    {
      XLALPlaygroundInSearchSummary( thisSearchSumm, &inPlay, &outPlay );
      outPlayNS = XLALGPSToINT8NS( &outPlay );

      if ( dataType == playground_only )
      {
        /* increment the total trigger time by the amount of playground */
        triggerInputTimeNS += outPlayNS;
      }
      else if ( dataType == exclude_play )
      {
        /* increment the total trigger time by the out time minus */
        /* the time that is in the playground                     */
        triggerInputTimeNS += triggerTimeNS - outPlayNS;
      }
    }
    else
    {
      /* increment the total trigger time by the out time minus */
      triggerInputTimeNS += triggerTimeNS;
    }
  }


  /*
   *
   * sort the inspiral events by time
   *
   */


  if ( injectFileName || sortTriggers )
  {
    inspiralEventList = XLALSortMultiInspiral( inspiralEventList,
        *LALCompareMultiInspiralByTime );
  }

  /*
   *
   * read in the injection XML file, if we are doing an injection analysis
   *
   */

  if ( injectFileName )
  {
    if ( vrbflg )
      fprintf( stdout, "reading injections from %s... ", injectFileName );

    numSimEvents = SimInspiralTableFromLIGOLw( &simEventHead,
        injectFileName, 0, 0 );

    if ( vrbflg ) fprintf( stdout, "got %d injections\n", numSimEvents );

    if ( numSimEvents < 0 )
    {
      fprintf( stderr, "error: unable to read sim_inspiral table from %s\n",
          injectFileName );
      exit( 1 );
    }

    /* keep play/non-play/all injections */
    if ( dataType == playground_only && vrbflg ) fprintf( stdout,
        "Keeping only playground injections\n" );
    else if ( dataType == exclude_play && vrbflg ) fprintf( stdout,
        "Keeping only non-playground injections\n" );
    else if ( dataType == all_data && vrbflg ) fprintf( stdout,
        "Keeping all injections\n" );
    XLALPlayTestSimInspiral( &simEventHead, &dataType );

    /* keep only injections in times analyzed */
    numSimInData = XLALSimInspiralInSearchedData( &simEventHead,
        &searchSummList );

    if ( vrbflg ) fprintf( stdout, "%d injections in analyzed data\n",
        numSimInData );


    /* check for events that are coincident with injections */
    numSimFound = XLALMultiSimInspiralTest( &simEventHead,
        &inspiralEventList, &missedSimHead, &missedHead, injectWindowNS );

    if ( vrbflg ) fprintf( stdout, "%d injections found in the ifos\n",
        numSimFound );

    if ( numSimFound )
    {
      for ( thisEvent = inspiralEventList; thisEvent;
          thisEvent = thisEvent->next, numMultiFound++ );
      if ( vrbflg ) fprintf( stdout,
          "%d triggers found at times of injection\n", numMultiFound );
    }

    /* free the missed singles  */
    while ( missedHead )
    {
      thisEvent = missedHead;
      missedHead = missedHead->next;
      XLALFreeMultiInspiral( &thisEvent );
    }
  }


  /*
   *
   * extract specified slide
   *
   */

  if ( extractSlide )
  {
    slideEvent = XLALMultiInspiralSlideCut( &inspiralEventList, extractSlide );
    /* free events from other slides */
    while ( inspiralEventList )
    {
      thisEvent = inspiralEventList;
      inspiralEventList = inspiralEventList->next;
      XLALFreeMultiInspiral( &thisEvent );
    }

    /* move events to inspiralEventList */
    inspiralEventList = slideEvent;
    slideEvent = NULL;
  }


  /*
   *
   * cluster the remaining events
   *
   */


  if ( inspiralEventList && clusterchoice )
  {
    if ( vrbflg ) fprintf( stdout, "clustering remaining triggers... " );

    if ( !numSlides ) {
      numClusteredEvents = XLALClusterMultiInspiralTable( &inspiralEventList,
        cluster_dt, clusterchoice );
    }
    else
    {
      int slide = 0;
      int numClusteredSlide = 0;
      MultiInspiralTable *tmp_slideEvent = NULL;
      MultiInspiralTable *slideClust = NULL;

      if ( vrbflg ) fprintf( stdout, "splitting events by slide\n" );

      for( slide = -numSlides; slide < (numSlides + 1); slide++)
      {
        if ( vrbflg ) fprintf( stdout, "slide number %d; ", slide );
        /* extract the slide */
        tmp_slideEvent = XLALMultiInspiralSlideCut( &inspiralEventList, slide );
        /* run clustering */
        numClusteredSlide = XLALClusterMultiInspiralTable( &tmp_slideEvent,
          cluster_dt, clusterchoice);

        if ( vrbflg ) fprintf( stdout, "%d clustered events \n",
          numClusteredSlide );
        numClusteredEvents += numClusteredSlide;

        /* add clustered triggers */
        if( tmp_slideEvent )
        {
          if( slideClust )
          {
            thisEvent = thisEvent->next = tmp_slideEvent;
          }
          else
          {
            slideClust = thisEvent = tmp_slideEvent;
          }
          /* scroll to end of list */
          for( ; thisEvent->next; thisEvent = thisEvent->next);
        }
      }

      /* free inspiralEventList -- although we expect it to be empty */
      while ( inspiralEventList )
      {
        thisEvent = inspiralEventList;
        inspiralEventList = inspiralEventList->next;
        XLALFreeMultiInspiral( &thisEvent );
      }

      /* move events to coincHead */
      inspiralEventList = slideClust;
      slideClust = NULL;
    }

    if ( vrbflg ) fprintf( stdout, "done\n" );
    if ( vrbflg ) fprintf( stdout, "%d clustered events \n",
        numClusteredEvents );
  }


  /*
   *
   * update search_summary->nevents with an authoritative count of triggers
   *
   */

  searchSummList->nevents = 0;
  thisEvent = inspiralEventList;
  while (thisEvent) {
    searchSummList->nevents += 1;
    thisEvent = thisEvent->next;
  }

  /*
   *
   * write output data
   *
   */


  /* write the main output file containing found injections */
  if ( vrbflg ) fprintf( stdout, "writing output xml files... " );
  memset( &xmlStream, 0, sizeof(LIGOLwXMLStream) );
  LAL_CALL( LALOpenLIGOLwXMLFile( &status, &xmlStream, outputFileName ), &status );

  /* write out the process and process params tables */
  if ( vrbflg ) fprintf( stdout, "process... " );
  XLALGPSTimeNow(&(proctable.processTable->end_time));
  LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream, process_table ),
      &status );
  LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, proctable,
        process_table ), &status );
  LAL_CALL( LALEndLIGOLwXMLTable ( &status, &xmlStream ), &status );
  free( proctable.processTable );

  /* erase the first empty process params entry */
  {
    ProcessParamsTable *emptyPPtable = procparams.processParamsTable;
    procparams.processParamsTable = procparams.processParamsTable->next;
    free( emptyPPtable );
  }

  /* write the process params table */
  if ( vrbflg ) fprintf( stdout, "process_params... " );
  LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream,
        process_params_table ), &status );
  LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, procparams,
        process_params_table ), &status );
  LAL_CALL( LALEndLIGOLwXMLTable ( &status, &xmlStream ), &status );

  /* write search_summary table */
  if ( vrbflg ) fprintf( stdout, "search_summary... " );
  outputTable.searchSummaryTable = searchSummList;
  LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream,
        search_summary_table ), &status );
  LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, outputTable,
        search_summary_table ), &status );
  LAL_CALL( LALEndLIGOLwXMLTable ( &status, &xmlStream ), &status );

  /* write the search_summvars table */
  if ( vrbflg ) fprintf( stdout, "search_summvars... " );
  LAL_CALL( LALBeginLIGOLwXMLTable( &status ,&xmlStream,
        search_summvars_table), &status );
  searchSummvarsTable.searchSummvarsTable = inputFiles;
  LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, searchSummvarsTable,
        search_summvars_table), &status );
  LAL_CALL( LALEndLIGOLwXMLTable( &status, &xmlStream), &status );

  /* write summ_value table */
  if ( summValueList )
  {
    if ( vrbflg ) fprintf( stdout, "search_summary... " );
    outputTable.summValueTable = summValueList;
    LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream,
          summ_value_table ), &status );
    LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, outputTable,
          summ_value_table ), &status );
    LAL_CALL( LALEndLIGOLwXMLTable ( &status, &xmlStream ), &status );
  }

  /* Write the found injections to the sim table */
  if ( simEventHead )
  {
    if ( vrbflg ) fprintf( stdout, "sim_inspiral... " );
    outputTable.simInspiralTable = simEventHead;
    LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream,
          sim_inspiral_table ), &status );
    LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, outputTable,
          sim_inspiral_table ), &status );
    LAL_CALL( LALEndLIGOLwXMLTable( &status, &xmlStream ), &status );
  }

  /* Write the results to the inspiral table */
  if ( inspiralEventList )
  {
    if ( vrbflg ) fprintf( stdout, "multi_inspiral... " );
    outputTable.multiInspiralTable = inspiralEventList;
    LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream,
          multi_inspiral_table ), &status );
    LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, outputTable,
          multi_inspiral_table ), &status );
    LAL_CALL( LALEndLIGOLwXMLTable( &status, &xmlStream ), &status);
  }

  /* close the output file */
  LAL_CALL( LALCloseLIGOLwXMLFile(&status, &xmlStream), &status);
  if ( vrbflg ) fprintf( stdout, "done\n" );


  if ( missedFileName )
  {
    /* open the missed injections file and write the missed injections to it */
    if ( vrbflg ) fprintf( stdout, "writing missed injections... " );
    memset( &xmlStream, 0, sizeof(LIGOLwXMLStream) );
    LAL_CALL( LALOpenLIGOLwXMLFile( &status, &xmlStream, missedFileName ),
        &status );

    if ( missedSimHead )
    {
      outputTable.simInspiralTable = missedSimHead;
      LAL_CALL( LALBeginLIGOLwXMLTable( &status, &xmlStream, sim_inspiral_table ),
          &status );
      LAL_CALL( LALWriteLIGOLwXMLTable( &status, &xmlStream, outputTable,
            sim_inspiral_table ), &status );
      LAL_CALL( LALEndLIGOLwXMLTable( &status, &xmlStream ), &status );
    }

    LAL_CALL( LALCloseLIGOLwXMLFile( &status, &xmlStream ), &status );
    if ( vrbflg ) fprintf( stdout, "done\n" );
  }

  if ( summFileName )
  {
    LIGOTimeGPS triggerTime;

    /* write out a summary file */
    fp = fopen( summFileName, "w" );

    switch ( dataType )
    {
      case playground_only:
        fprintf( fp, "using data from playground times only\n" );
        break;
      case exclude_play:
        fprintf( fp, "excluding all triggers in playground times\n" );
        break;
      case all_data:
        fprintf( fp, "using all input data\n" );
        break;
      default:
        fprintf( stderr, "data set not defined\n" );
        exit( 1 );
    }

    fprintf( fp, "read triggers from %d files\n", numInFiles );
    fprintf( fp, "number of triggers in input files: %d \n", numEvents );
    fprintf( fp, "number of triggers in input data %d \n", numEventsKept );
    if ( ifoName )
    {
      fprintf( fp, "number of triggers from %s ifo %d \n", ifoName,
          numEventsInIFO );
    }


    if ( snrStar > 0 )
    {
      fprintf( fp, "number of triggers in input data with snr above %f: %d \n",
          snrStar, numEventsAboveSNRThresh );
    }

    if ( rsqVetoThresh > 0 )
    {
      fprintf( fp, "performed R-squared veto on triggers with snr < %f\n",
          rsqMaxSnr);
      fprintf( fp, "with rsqveto_duration below %f\n",
          rsqVetoThresh);
      if ( (rsqAboveSnrCoeff > 0) && (rsqAboveSnrPow > 0) )
      {
        fprintf( fp, "and on triggers with snr > %f\n",
            rsqMaxSnr);
        fprintf( fp, "with rsqveto_duration above %f * snr ^ %f\n",
            rsqAboveSnrCoeff, rsqAboveSnrPow );
      }
      fprintf( fp, "the number of triggers below the R-squared veto are: %d \n",
          numEventsBelowRsqThresh);
    }

    if ( vetoFileName )
    {
      fprintf( fp, "number of triggers not vetoed by %s: %d \n",
          vetoFileName, numEventsSurvivingVeto );
    }

    XLALINT8NSToGPS( &triggerTime, triggerInputTimeNS );
    fprintf( fp, "amount of time analysed for triggers %d sec %d ns\n",
        triggerTime.gpsSeconds, triggerTime.gpsNanoSeconds );

    if ( injectFileName )
    {
      fprintf( fp, "read %d injections from file %s\n",
          numSimEvents, injectFileName );

      fprintf( fp, "number of injections in input data: %d\n", numSimInData );
      fprintf( fp, "number of injections found in input data: %d\n",
          numSimFound );
      fprintf( fp,
          "number of triggers found within %lld msec of injection: %d\n",
          (injectWindowNS / 1000000LL), numMultiFound );

      fprintf( fp, "efficiency: %f \n",
          (REAL4) numSimFound / (REAL4) numSimInData );
    }

    if ( extractSlide )
    {
      fprintf( fp, "kept only triggers from slide %d\n", extractSlide );
    }

    if ( clusterchoice )
    {
      if ( numSlides )
      {
        fprintf( fp, "clustering triggers from %d slides separately\n",
            numSlides );
      }
      fprintf( fp, "number of event clusters with %lld msec window: %d\n",
          cluster_dt/ 1000000LL, numClusteredEvents );
    }

    fclose( fp );
  }


  /*
   *
   * free memory and exit
   *
   */


  /* free the inspiral events we saved */
  while ( inspiralEventList )
  {
    thisEvent = inspiralEventList;
    inspiralEventList = inspiralEventList->next;
    LAL_CALL ( LALFreeMultiInspiral ( &status, &thisEvent ), &status);
  }

  /* free the process params */
  while( procparams.processParamsTable )
  {
    this_proc_param = procparams.processParamsTable;
    procparams.processParamsTable = this_proc_param->next;
    free( this_proc_param );
  }

  /* free the found injections */
  while ( simEventHead )
  {
    thisSimEvent = simEventHead;
    simEventHead = simEventHead->next;
    LALFree( thisSimEvent );
  }

  /* free the temporary memory containing the missed injections */
  while ( missedSimHead )
  {
    tmpSimEvent = missedSimHead;
    missedSimHead = missedSimHead->next;
    LALFree( tmpSimEvent );
  }

  /* free search summaries read in */
  while ( searchSummList )
  {
    thisSearchSumm = searchSummList;
    searchSummList = searchSummList->next;
    LALFree( thisSearchSumm );
  }

  while ( summValueList )
  {
    SummValueTable *thisSummValue;
    thisSummValue = summValueList;
    summValueList = summValueList->next;
    LALFree( thisSummValue );
  }

  if ( vetoFileName )
  {
    XLALSegListClear( &vetoSegs );
  }


  if ( vrbflg ) fprintf( stdout, "checking memory leaks and exiting\n" );
  LALCheckMemoryLeaks();
  exit( 0 );
}