Changeset 2728 for trunk/MagicSoft/Mars/mraw/MRawEvtHeader.cc

Timestamp:

12/20/03 13:46:17 (21 years ago)

Author:

tbretz

Message:

*** empty log message ***

File:

• trunk/MagicSoft/Mars/mraw/MRawEvtHeader.cc (modified) (2 diffs)

trunk/MagicSoft/Mars/mraw/MRawEvtHeader.cc

@@ -236 +236 @@
 }
 
+Bool_t MRawEvtHeader::DecodeTime(UInt_t abstime[2]) const
+{
+    // BADC|1032 --> DCBA|3210 (Byte swap - exchange MSB and LSB)
+    abstime[0] = (abstime[0]<<16) | (abstime[0]>>16);
+    abstime[1] = (abstime[1]<<16) | (abstime[1]>>16);
+
+    const Byte_t h = (abstime[0]>>18 & 0x30)*10 + (abstime[0]>>14 & 0x0f);
+    const Byte_t m = (abstime[0]>>11 & 0x70)*10 + (abstime[0]>> 7 & 0x0f);
+    const Byte_t s = (abstime[0]>> 4 & 0x70)*10 + (abstime[0]>> 0 & 0x0f);
+    const Int_t ms =
+        ((abstime[1]>>16)&0xf)*1000 +
+        ((abstime[1]>> 8)&0xf)* 100 +
+        ((abstime[1]>> 4)&0xf)*  10 +
+        ((abstime[1]>> 0)&0xf)*   1;
+
+    // hms   =3210 -->  h=2:4 m=3:4 s=3:4
+    // subsec=DCBA --> subsec?
+    *fLog << dbg << dec;
+    *fLog << (int)(abstime[0]>>18 & 0x30); // h
+    *fLog << (int)(abstime[0]>>14 & 0x0f); // h
+    *fLog << ":";
+    *fLog << (int)(abstime[0]>>11 & 0x70); // m
+    *fLog << (int)(abstime[0]>> 7 & 0x0f); // m
+    *fLog << ":";
+    *fLog << (int)(abstime[0]>> 4 & 0x70); // s
+    *fLog << (int)(abstime[0]>> 0 & 0x0f); // s
+    *fLog << " ";
+    *fLog << (int)(abstime[1]>>16 & 0xf) << ".";
+    *fLog << (int)(abstime[1]>> 8 & 0xf) << ".";
+    *fLog << (int)(abstime[1]>> 4 & 0xf) << ".";
+    *fLog << (int)(abstime[1]>> 0 & 0xf);
+    *fLog << endl;
+
+    // Update the time stamp with the current event time.
+    // Make sure, that the time stamp was initialized correctly
+    // with the start-date/time of the run (after reading the run header)
+    //
+    // Here the nanosec precision is ignored... (FIXME!)
+    return fTime->UpdMagicTime(h, m, s, ms);
+}
+
 // --------------------------------------------------------------------------
 //
@@ -241 +282 @@
 // return FALSE if there is now header anymore, else TRUE
 //
+// Updates the time stamp with the current event time.
+// Make sure, that the time stamp was initialized correctly
+// with the start-date/time of the run (after reading the run header)
+//
+// Remark: This 'feature' disallows single runs of more than 11h!
+//
 int MRawEvtHeader::ReadEvt(istream &fin)
 {
     fin.read((char*)&fDAQEvtNumber, 4);  // Total=4
 
-    UInt_t abstime[2];
+    UInt_t abstime[2];                   // BADC|1032
     fin.read((char*)abstime,        8);  // Total=12
-
-    //
-    // store the time of the event in the corresponding container
-    //
-    /*
-     const Double_t mhz = 9.375;                        // [1e6 ticks/s]
-     const Double_t t   = (Double_t)abstime[0]/mhz;     // [ns]
-     const UShort_t ns  = (UShort_t)fmod(t*1e-3, 1e9);
-     const Byte_t s     = (Byte_t)fmod(t/1e12, 60);
-     const Byte_t m     = (Byte_t)fmod(t/60e12, 60);
-     const Byte_t h     = (Byte_t)(t/3600e12);
-     fTime->SetTime(h, m, s, ns);
-     */
+    if (!DecodeTime(abstime))
+    {
+        *fLog << err << "ERROR - Event time in event header invalid... abort." << endl;
+        return kFALSE;
+    }
 
     Byte_t dummy[4];