RTS/src/DAQ_L3/l3_reader.cxx

#include <stdio.h>
#include <string.h>
#include <arpa/inet.h>

#include <rtsLog.h>
#include <rtsSystems.h>
#include <rts.h>

#include "daq_l3.h"


inline float fswap(float swapped)
{
        unsigned int* uintptr = (unsigned int*) &swapped;
        unsigned int uintvar = l2h32(*uintptr);
        float* floatvar = (float*)&uintvar;
        return *floatvar;
}


#ifdef RTS_LITTLE_ENDIAN
#define l2hfloat(x) (x)
#define b2hfloat(x) (fswap(x))
#else
#define l2hfloat(x) (fswap(x))
#define b2hfloat(x) (x)
#endif


int l3_reader(char *m, struct l3_t *l3, u_int driver)
{
        struct DATAP *datap = (struct DATAP *)m ;
        struct L3_P *l3p ;
        int len, off ;
        char *l3_gtd_start = 0 ;
        int fy09_format = 0 ;

        l3->max_channels = 1280000 ;
        l3->channels = 0 ;
        l3->mode = 1 ;

// Tonko, zero this out and make non-sensical in case of further
// problems down the road
        l3->tracks_num = 0 ;
        l3->cluster_num = 0 ;
        l3->xVertex = -1000.0 ;
        l3->yVertex = -1000.0 ;
        l3->zVertex = -1000.0 ;


        if(datap == NULL) return 0 ;

        if(driver) {    // "m" points directly to L3_GTD! Used in FY09 HLT data
                l3_gtd_start = m ;      // directly points to L3_GTD!           
                fy09_format = 1 ;
                
                l3->mode = 0 ;  // this holds the trigger def
                l3->channels = 0 ;      // this holds the sequnce number
        }
        else {

                len = ntohl(datap->det[L3_ID].len) * 4 ;
                if(len == 0) return 0 ;

                off = ntohl(datap->det[L3_ID].off) ;
                if(off == 0) return 0 ;

                l3p = (struct L3_P *)((u_int *)m+off) ;


                len = l3p->bh.length;


                LOG(DBG,"L3_P bytes %d",len,0,0,0) ;

                if(checkBank(l3p->bh.bank_type,"L3_P") < 0) {
                        return -1 ;
                }


                if(l3p->tracks.len && l3p->tracks.off){
                        l3_gtd_start = ((char*)l3p + l2h32(l3p->tracks.off)*4) ;
                }
        }


        if(!l3_gtd_start) return 0 ;

//      if(l3p->tracks.len && l3p->tracks.off){
//            struct L3_GTD* l3gtd = (struct L3_GTD*)((char*)l3p + l2h32(l3p->tracks.off)*4) ;

        if(l3_gtd_start) {
              struct L3_GTD* l3gtd = (struct L3_GTD *) l3_gtd_start ;

// Tonko, sanity check
                if(checkBank(l3gtd->bh.bank_type,"L3_GTD") < 0) {
                        return -1 ;
                }

                if(fy09_format) {       // override stuff
                        l3->mode = l2h32(l3gtd->bh.crc) ;       // contains the decision!
                        l3->channels = l2h32(l3gtd->bh.w9) ;    // contains the event sequence number from trigger!
                }

              l3->tracks_num = l2h32(l3gtd->nTracks);
              l3->cluster_num = l2h32(l3gtd->nHits);
              l3->xVertex = l2hfloat(l3gtd->xVert);
              l3->yVertex = l2hfloat(l3gtd->yVert);
              l3->zVertex = l2hfloat(l3gtd->zVert);

// Tonko, sanity check
                if(l3->tracks_num >= L3_MAX_NR_TRACKS) {
                        LOG(ERR,"L3 track number %d > %d! Maxing them out...",l3->tracks_num,L3_MAX_NR_TRACKS ,0,0,0) ;
                        l3->tracks_num = L3_MAX_NR_TRACKS ;
                }


              for (unsigned int i=0; i<l3->tracks_num; i++) {
                  global_track *tr = &(l3gtd->track[i]);

                  l3->track[i].id = l2h32(tr->id);

#ifndef UNIX_LITTLE_ENIDAN
                  l3->track[i].flag         = tr->flag;
                  l3->track[i].innerMostRow = tr->innerMostRow;
                  l3->track[i].outerMostRow = tr->outerMostRow;

                  l3->track[i].nHits = tr->nHits;
                  l3->track[i].ndedx = tr->ndedx;
                  l3->track[i].q     = tr->q;
#else
                  l3->track[i].flag = ( ((unsigned short)tr->innerMostRow) |
                                       ((unsigned short)tr->outerMostRow)<<8);
                  l3->track[i].innerMostRow = (char)( tr->flag & 0x00ff );
                  l3->track[i].outerMostRow = (char)((tr->flag & 0xff00)>>8);

                  l3->track[i].nHits    = (unsigned char)tr->q;
                  l3->track[i].reserved = (char)tr->ndedx;
                  l3->track[i].ndedx    = (unsigned char)tr->reserved;
                  l3->track[i].q        = (char)tr->nHits;
#endif
                  l3->track[i].chi2[0] = l2hfloat(tr->chi2[0]);
                  l3->track[i].chi2[1] = l2hfloat(tr->chi2[1]);
                  l3->track[i].dedx    = l2hfloat(tr->dedx);
                  l3->track[i].pt      = l2hfloat(tr->pt);
                  l3->track[i].phi0    = l2hfloat(tr->phi0);
                  l3->track[i].psi     = l2hfloat(tr->psi);
                  l3->track[i].r0      = l2hfloat(tr->r0);
                  l3->track[i].tanl    = l2hfloat(tr->tanl);
                  l3->track[i].z0      = l2hfloat(tr->z0);
                  l3->track[i].length  = l2hfloat(tr->length);
                  l3->track[i].dpt     = l2hfloat(tr->dpt);
                  l3->track[i].dpsi    = l2hfloat(tr->dpsi);
                  l3->track[i].dz0     = l2hfloat(tr->dz0);
                  l3->track[i].dtanl   = l2hfloat(tr->dtanl);

              }
              

        }


#ifdef SHOW_DEBUG_INFO

#ifdef UNIX_LITTLE_ENDIAN
        printf("Running on LITTLE endian machine\n");
#else
        printf("Running on BIG endian machine\n");
#endif

        printf("\nVertex: (%6.2f/%6.2f/%6.2f)\n",
               l3->xVertex, l3->yVertex, l3->zVertex);

        printf("Tracks: %5d   Clusters %7d\n",
               l3->tracks_num, l3->cluster_num);
        
        for (unsigned int i=0; i<l3->tracks_num; i++) {
          printf("%5d: pt=%5.3f z0=%7.2f q=%2d nHits=%2d ndedx=%2d ",
                 i, l3->track[i].pt, l3->track[i].z0, l3->track[i].q, 
                 l3->track[i].nHits, l3->track[i].ndedx); 

          printf("flag=0x%04x iRow=%2d oRow=%2d\n",
                 l3->track[i].flag, l3->track[i].innerMostRow, 
                 l3->track[i].outerMostRow); 
        }

#endif

        return 1 ; // anything positive...

}

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