[u/mrichter/AliRoot.git] / RAW / AliRawReaderDate.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

///////////////////////////////////////////////////////////////////////////////
///
/// This is a class for reading raw data from a date file or event.
///
/// The AliRawReaderDate is constructed either with a pointer to a
/// date event or with a file name and an event number.
///
///////////////////////////////////////////////////////////////////////////////

#include "AliRawReaderDate.h"
#ifdef ALI_DATE
#include "event.h"
#endif

ClassImp(AliRawReaderDate)


AliRawReaderDate::AliRawReaderDate(
#ifdef ALI_DATE
				   void* event
#else
				   void* /* event */
#endif
				   ) :
  fFile(NULL),
  fEvent(NULL),
  fSubEvent(NULL),
  fEquipment(NULL),
  fPosition(NULL),
  fEnd(NULL)
{
// create an object to read digits from the given date event

#ifdef ALI_DATE
  fEvent = (eventHeaderStruct*) event;
#else
  Fatal("AliRawReaderDate", "this class was compiled without DATE");
#endif
}

AliRawReaderDate::AliRawReaderDate(
#ifdef ALI_DATE
				   const char* fileName, Int_t eventNumber
#else
				   const char* /*fileName*/, 
				   Int_t /*eventNumber*/
#endif
				   ) :
  fFile(NULL),
  fEvent(NULL),
  fSubEvent(NULL),
  fEquipment(NULL),
  fPosition(NULL),
  fEnd(NULL)
{
// create an object to read digits from the given date event

#ifdef ALI_DATE
  fFile = fopen(fileName, "rb");
  if (!fFile) {
    Error("AliRawReaderDate", "could not open file %s", fileName);
    return;
  }
  if (eventNumber < 0) return;

  eventHeaderStruct header;
  UInt_t headerSize = sizeof(eventHeaderStruct);
  while (fread(&header, 1, headerSize, fFile) == headerSize) {
    if (eventNumber == 0) {
      UChar_t* buffer = new UChar_t[header.eventSize];
      fseek(fFile, -(long)headerSize, SEEK_CUR);
      if (fread(buffer, 1, header.eventSize, fFile) != header.eventSize) break;
      fEvent = (eventHeaderStruct*) buffer;
      break;
    }
    fseek(fFile, header.eventSize-headerSize, SEEK_CUR);
    eventNumber--;
  }

#else
  Fatal("AliRawReaderDate", "this class was compiled without DATE");
#endif
}

AliRawReaderDate::AliRawReaderDate(const AliRawReaderDate& rawReader) :
  AliRawReader(rawReader),
  fFile(rawReader.fFile),
  fEvent(rawReader.fEvent),
  fSubEvent(rawReader.fSubEvent),
  fEquipment(rawReader.fEquipment),
  fPosition(rawReader.fPosition),
  fEnd(rawReader.fEnd)

{
// copy constructor

  Fatal("AliRawReaderDate", "copy constructor not implemented");
}

AliRawReaderDate& AliRawReaderDate::operator = (const AliRawReaderDate& 
						/*rawReader*/)
{
// assignment operator

  Fatal("operator =", "assignment operator not implemented");
  return *this;
}

AliRawReaderDate::~AliRawReaderDate()
{
// destructor

#ifdef ALI_DATE
  if (fFile) {
    delete[] fEvent;
    fclose(fFile);
  }
#endif
}


UInt_t AliRawReaderDate::GetType() const
{
// get the type from the event header

#ifdef ALI_DATE
  if (!fEvent) return 0;
  return fEvent->eventType;
#else
  return 0;
#endif
}

UInt_t AliRawReaderDate::GetRunNumber() const
{
// get the run number from the event header

#ifdef ALI_DATE
  if (!fEvent) return 0;
  return fEvent->eventRunNb;
#else
  return 0;
#endif
}

const UInt_t* AliRawReaderDate::GetEventId() const
{
// get the event id from the event header

#ifdef ALI_DATE
  if (!fEvent) return NULL;
  return fEvent->eventId;
#else
  return NULL;
#endif
}

const UInt_t* AliRawReaderDate::GetTriggerPattern() const
{
// get the trigger pattern from the event header

#ifdef ALI_DATE
  if (!fEvent) return NULL;
  return fEvent->eventTriggerPattern;
#else
  return NULL;
#endif
}

const UInt_t* AliRawReaderDate::GetDetectorPattern() const
{
// get the detector pattern from the event header

#ifdef ALI_DATE
  if (!fEvent) return NULL;
  return fEvent->eventDetectorPattern;
#else
  return NULL;
#endif
}

const UInt_t* AliRawReaderDate::GetAttributes() const
{
// get the type attributes from the event header

#ifdef ALI_DATE
  if (!fEvent) return NULL;
  return fEvent->eventTypeAttribute;
#else
  return NULL;
#endif
}

const UInt_t* AliRawReaderDate::GetSubEventAttributes() const
{
// get the type attributes from the sub event header

#ifdef ALI_DATE
  if (!fSubEvent) return NULL;
  return fSubEvent->eventTypeAttribute;
#else
  return NULL;
#endif
}

UInt_t AliRawReaderDate::GetLDCId() const
{
// get the LDC Id from the event header

#ifdef ALI_DATE
  if (!fSubEvent) return 0;
  return fSubEvent->eventLdcId;
#else
  return 0;
#endif
}

UInt_t AliRawReaderDate::GetGDCId() const
{
// get the GDC Id from the event header

#ifdef ALI_DATE
  if (!fEvent) return 0;
  return fEvent->eventGdcId;
#else
  return 0;
#endif
}

UInt_t AliRawReaderDate::GetTimestamp() const
{
// get the timestamp from the event header

#ifdef ALI_DATE
  if (!fEvent) return 0;
  return fEvent->eventTimestamp;
#else
  return 0;
#endif
}

Int_t AliRawReaderDate::GetEquipmentSize() const
{
// get the size of the equipment (including the header)

#ifdef ALI_DATE
  if (!fEquipment) return 0;
  if (fSubEvent->eventVersion <= 0x00030001) {
    return fEquipment->equipmentSize + sizeof(equipmentHeaderStruct);
  } else {
    return fEquipment->equipmentSize;
  }
#else
  return 0;
#endif
}

Int_t AliRawReaderDate::GetEquipmentType() const
{
// get the type from the equipment header

#ifdef ALI_DATE
  if (!fEquipment) return -1;
  return fEquipment->equipmentType;
#else
  return 0;
#endif
}

Int_t AliRawReaderDate::GetEquipmentId() const
{
// get the ID from the equipment header

#ifdef ALI_DATE
  if (!fEquipment) return -1;
  return fEquipment->equipmentId;
#else
  return 0;
#endif
}

const UInt_t* AliRawReaderDate::GetEquipmentAttributes() const
{
// get the attributes from the equipment header

#ifdef ALI_DATE
  if (!fEquipment) return NULL;
  return fEquipment->equipmentTypeAttribute;
#else
  return 0;
#endif
}

Int_t AliRawReaderDate::GetEquipmentElementSize() const
{
// get the basic element size from the equipment header

#ifdef ALI_DATE
  if (!fEquipment) return 0;
  return fEquipment->equipmentBasicElementSize;
#else
  return 0;
#endif
}

Int_t AliRawReaderDate::GetEquipmentHeaderSize() const
{
  // Get the equipment header size
  // 28 bytes by default
#ifdef ALI_DATE
  return sizeof(equipmentHeaderStruct);
#else
  return 0;
#endif
}

Bool_t AliRawReaderDate::ReadHeader()
{
// read a data header at the current position
// returns kFALSE if the data header could not be read

  fErrorCode = 0;

#ifdef ALI_DATE
  fHeader = NULL;
  if (!fEvent) return kFALSE;
  // check whether there are sub events
  if (fEvent->eventSize <= fEvent->eventHeadSize) return kFALSE;

  do {
    // skip payload (if event was not selected)
    if (fCount > 0) fPosition += fCount;

    // get the first or the next equipment if at the end of an equipment
    if (!fEquipment || (fPosition >= fEnd)) {
      fEquipment = NULL;

      // get the first or the next sub event if at the end of a sub event
      if (!fSubEvent || 
	  (fPosition >= ((UChar_t*)fSubEvent) + fSubEvent->eventSize)) {

	// check for end of event data
	if (fPosition >= ((UChar_t*)fEvent)+fEvent->eventSize) return kFALSE;
        if (!TEST_SYSTEM_ATTRIBUTE(fEvent->eventTypeAttribute, 
                                   ATTR_SUPER_EVENT)) {
	  fSubEvent = fEvent;   // no super event
	} else if (fSubEvent) {
	  fSubEvent = (eventHeaderStruct*) (((UChar_t*)fSubEvent) + 
					    fSubEvent->eventSize);
	} else {
	  fSubEvent = (eventHeaderStruct*) (((UChar_t*)fEvent) + 
					    fEvent->eventHeadSize);
	}

	// check the magic word of the sub event
	if (fSubEvent->eventMagic != EVENT_MAGIC_NUMBER) {
	  Error("ReadHeader", "wrong magic number in sub event!\n"
		" run: %d  event: %d %d  LDC: %d  GDC: %d\n", 
		fSubEvent->eventRunNb, 
		fSubEvent->eventId[0], fSubEvent->eventId[1],
		fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	  fErrorCode = kErrMagic;
	  return kFALSE;
	}

	// continue if no data in the subevent
	if (fSubEvent->eventSize == fSubEvent->eventHeadSize) {
	  fPosition = fEnd = ((UChar_t*)fSubEvent) + fSubEvent->eventSize;
	  fCount = 0;
	  continue;
	}

	fEquipment = (equipmentHeaderStruct*)
	  (((UChar_t*)fSubEvent) + fSubEvent->eventHeadSize);

      } else {
	fEquipment = (equipmentHeaderStruct*) fEnd;
      }

      fCount = 0;
      fPosition = ((UChar_t*)fEquipment) + sizeof(equipmentHeaderStruct);
      if (fSubEvent->eventVersion <= 0x00030001) {
        fEnd = fPosition + fEquipment->equipmentSize;
      } else {
        fEnd = ((UChar_t*)fEquipment) + fEquipment->equipmentSize;
      }
    }

    // continue with the next sub event if no data left in the payload
    if (fPosition >= fEnd) continue;

    if (fRequireHeader) {
      // check that there are enough bytes left for the data header
      if (fPosition + sizeof(AliRawDataHeader) > fEnd) {
	Error("ReadHeader", "could not read data header data!");
	Warning("ReadHeader", "skipping %d bytes\n"
		" run: %d  event: %d %d  LDC: %d  GDC: %d\n", 
		fEnd - fPosition, fSubEvent->eventRunNb, 
		fSubEvent->eventId[0], fSubEvent->eventId[1],
		fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	fCount = 0;
	fPosition = fEnd;
	fErrorCode = kErrNoDataHeader;
	continue;
      }

      // "read" the data header
      fHeader = (AliRawDataHeader*) fPosition;
      if ((fPosition + fHeader->fSize) != fEnd) {
	if (fHeader->fSize != 0xFFFFFFFF)
	  Warning("ReadHeader",
		  "raw data size found in the header is wrong (%d != %d)! Using the equipment size instead !",
		  fHeader->fSize, fEnd - fPosition);
	fHeader->fSize = fEnd - fPosition;
      }
      fPosition += sizeof(AliRawDataHeader);
    }

    if (fHeader && (fHeader->fSize != 0xFFFFFFFF)) {
      fCount = fHeader->fSize - sizeof(AliRawDataHeader);

      // check consistency of data size in the header and in the sub event
      if (fPosition + fCount > fEnd) {
	Error("ReadHeader", "size in data header exceeds event size!");
	Warning("ReadHeader", "skipping %d bytes\n"
		" run: %d  event: %d %d  LDC: %d  GDC: %d\n", 
		fEnd - fPosition, fSubEvent->eventRunNb, 
		fSubEvent->eventId[0], fSubEvent->eventId[1],
		fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	fCount = 0;
	fPosition = fEnd;
	fErrorCode = kErrSize;
	continue;
      }

    } else {
      fCount = fEnd - fPosition;
    }

  } while (!fEquipment || !IsSelected());

  return kTRUE;
#else
  return kFALSE;
#endif
}

Bool_t AliRawReaderDate::ReadNextData(UChar_t*& data)
{
// reads the next payload at the current position
// returns kFALSE if the data could not be read

  fErrorCode = 0;
  while (fCount == 0) {
    if (!ReadHeader()) return kFALSE;
  }
  data = fPosition;
  fPosition += fCount;  
  fCount = 0;
  return kTRUE;
}

Bool_t AliRawReaderDate::ReadNext(UChar_t* data, Int_t size)
{
// reads the next block of data at the current position
// returns kFALSE if the data could not be read

  fErrorCode = 0;
  if (fPosition + size > fEnd) {
    Error("ReadNext", "could not read data!");
    fErrorCode = kErrOutOfBounds;
    return kFALSE;
  }
  memcpy(data, fPosition, size);
  fPosition += size;
  fCount -= size;
  return kTRUE;
}


Bool_t AliRawReaderDate::Reset()
{
// reset the current position to the beginning of the event

#ifdef ALI_DATE
  fSubEvent = NULL;
  fEquipment = NULL;
#endif
  fCount = 0;
  fPosition = fEnd = NULL;
  return kTRUE;
}


Bool_t AliRawReaderDate::NextEvent()
{
// go to the next event in the date file

#ifdef ALI_DATE
  if (!fFile) return kFALSE;

  Reset();
  eventHeaderStruct header;
  UInt_t headerSize = sizeof(eventHeaderStruct);
  if (fEvent) delete[] fEvent;
  fEvent = &header;

  while (fread(&header, 1, headerSize, fFile) == headerSize) {
    if (!IsEventSelected()) {
      fseek(fFile, header.eventSize-headerSize, SEEK_CUR);
      continue;
    }
    UChar_t* buffer = new UChar_t[header.eventSize];
    fseek(fFile, -(long)headerSize, SEEK_CUR);
    if (fread(buffer, 1, header.eventSize, fFile) != header.eventSize) {
      Error("NextEvent", "could not read event from file");
      delete[] buffer;
      break;
    }
    fEvent = (eventHeaderStruct*) buffer;
    fEventNumber++;
    return kTRUE;
  };

  fEvent = NULL;
#endif

  return kFALSE;
}

Bool_t AliRawReaderDate::RewindEvents()
{
// go back to the beginning of the date file

  if (!fFile) return kFALSE;

  fseek(fFile, 0, SEEK_SET);
  fEventNumber = -1;
  return Reset();
}


Int_t AliRawReaderDate::CheckData() const
{
// check the consistency of the data

#ifdef ALI_DATE
  if (!fEvent) return 0;
  // check whether there are sub events
  if (fEvent->eventSize <= fEvent->eventHeadSize) return 0;

  eventHeaderStruct* subEvent = NULL;
  UChar_t* position = 0;
  UChar_t* end = 0;
  Int_t result = 0;

  while (kTRUE) {
    // get the first or the next sub event if at the end of a sub event
    if (!subEvent || (position >= end)) {

      // check for end of event data
      if (position >= ((UChar_t*)fEvent)+fEvent->eventSize) return result;
      if (!TEST_SYSTEM_ATTRIBUTE(fEvent->eventTypeAttribute, 
                                 ATTR_SUPER_EVENT)) {
        subEvent = fEvent;   // no super event
      } else if (subEvent) {
	subEvent = (eventHeaderStruct*) (((UChar_t*)subEvent) + 
					 subEvent->eventSize);
      } else {
	subEvent = (eventHeaderStruct*) (((UChar_t*)fEvent) + 
					 fEvent->eventHeadSize);
      }

      // check the magic word of the sub event
      if (subEvent->eventMagic != EVENT_MAGIC_NUMBER) {
	result |= kErrMagic;
	return result;
      }

      position = ((UChar_t*)subEvent) + subEvent->eventHeadSize + 
	sizeof(equipmentHeaderStruct);
      end = ((UChar_t*)subEvent) + subEvent->eventSize;
    }

    // continue with the next sub event if no data left in the payload
    if (position >= end) continue;

    if (fRequireHeader) {
    // check that there are enough bytes left for the data header
      if (position + sizeof(AliRawDataHeader) > end) {
	result |= kErrNoDataHeader;
	position = end;
	continue;
      }

      // check consistency of data size in the data header and in the sub event
      AliRawDataHeader* header = (AliRawDataHeader*) position;
      if ((position + header->fSize) != end) {
	if (header->fSize != 0xFFFFFFFF)
	  Warning("ReadHeader",
		  "raw data size found in the header is wrong (%d != %d)! Using the equipment size instead !",
		  header->fSize, end - position);
	header->fSize = end - position;
	result |= kErrSize;
      }
    }
    position = end;
  };

#endif
  return 0;
}
Commit	Line	Data
	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id$ */
	17
	18	///////////////////////////////////////////////////////////////////////////////
	19	///
	20	/// This is a class for reading raw data from a date file or event.
	21	///
	22	/// The AliRawReaderDate is constructed either with a pointer to a
	23	/// date event or with a file name and an event number.
	24	///
	25	///////////////////////////////////////////////////////////////////////////////
	26
	27	#include "AliRawReaderDate.h"
	28	#ifdef ALI_DATE
	29	#include "event.h"
	30	#endif
	31
	32	ClassImp(AliRawReaderDate)
	33
	34
	35	AliRawReaderDate::AliRawReaderDate(
	36	#ifdef ALI_DATE
	37	void* event
	38	#else
	39	void* /* event */
	40	#endif
	41	) :
	42	fFile(NULL),
	43	fEvent(NULL),
	44	fSubEvent(NULL),
	45	fEquipment(NULL),
	46	fPosition(NULL),
	47	fEnd(NULL)
	48	{
	49	// create an object to read digits from the given date event
	50
	51	#ifdef ALI_DATE
	52	fEvent = (eventHeaderStruct*) event;
	53	#else
	54	Fatal("AliRawReaderDate", "this class was compiled without DATE");
	55	#endif
	56	}
	57
	58	AliRawReaderDate::AliRawReaderDate(
	59	#ifdef ALI_DATE
	60	const char* fileName, Int_t eventNumber
	61	#else
	62	const char* /fileName/,
	63	Int_t /eventNumber/
	64	#endif
	65	) :
	66	fFile(NULL),
	67	fEvent(NULL),
	68	fSubEvent(NULL),
	69	fEquipment(NULL),
	70	fPosition(NULL),
	71	fEnd(NULL)
	72	{
	73	// create an object to read digits from the given date event
	74
	75	#ifdef ALI_DATE
	76	fFile = fopen(fileName, "rb");
	77	if (!fFile) {
	78	Error("AliRawReaderDate", "could not open file %s", fileName);
	79	return;
	80	}
	81	if (eventNumber < 0) return;
	82
	83	eventHeaderStruct header;
	84	UInt_t headerSize = sizeof(eventHeaderStruct);
	85	while (fread(&header, 1, headerSize, fFile) == headerSize) {
	86	if (eventNumber == 0) {
	87	UChar_t* buffer = new UChar_t[header.eventSize];
	88	fseek(fFile, -(long)headerSize, SEEK_CUR);
	89	if (fread(buffer, 1, header.eventSize, fFile) != header.eventSize) break;
	90	fEvent = (eventHeaderStruct*) buffer;
	91	break;
	92	}
	93	fseek(fFile, header.eventSize-headerSize, SEEK_CUR);
	94	eventNumber--;
	95	}
	96
	97	#else
	98	Fatal("AliRawReaderDate", "this class was compiled without DATE");
	99	#endif
	100	}
	101
	102	AliRawReaderDate::AliRawReaderDate(const AliRawReaderDate& rawReader) :
	103	AliRawReader(rawReader),
	104	fFile(rawReader.fFile),
	105	fEvent(rawReader.fEvent),
	106	fSubEvent(rawReader.fSubEvent),
	107	fEquipment(rawReader.fEquipment),
	108	fPosition(rawReader.fPosition),
	109	fEnd(rawReader.fEnd)
	110
	111	{
	112	// copy constructor
	113
	114	Fatal("AliRawReaderDate", "copy constructor not implemented");
	115	}
	116
	117	AliRawReaderDate& AliRawReaderDate::operator = (const AliRawReaderDate&
	118	/rawReader/)
	119	{
	120	// assignment operator
	121
	122	Fatal("operator =", "assignment operator not implemented");
	123	return *this;
	124	}
	125
	126	AliRawReaderDate::~AliRawReaderDate()
	127	{
	128	// destructor
	129
	130	#ifdef ALI_DATE
	131	if (fFile) {
	132	delete[] fEvent;
	133	fclose(fFile);
	134	}
	135	#endif
	136	}
	137
	138
	139	UInt_t AliRawReaderDate::GetType() const
	140	{
	141	// get the type from the event header
	142
	143	#ifdef ALI_DATE
	144	if (!fEvent) return 0;
	145	return fEvent->eventType;
	146	#else
	147	return 0;
	148	#endif
	149	}
	150
	151	UInt_t AliRawReaderDate::GetRunNumber() const
	152	{
	153	// get the run number from the event header
	154
	155	#ifdef ALI_DATE
	156	if (!fEvent) return 0;
	157	return fEvent->eventRunNb;
	158	#else
	159	return 0;
	160	#endif
	161	}
	162
	163	const UInt_t* AliRawReaderDate::GetEventId() const
	164	{
	165	// get the event id from the event header
	166
	167	#ifdef ALI_DATE
	168	if (!fEvent) return NULL;
	169	return fEvent->eventId;
	170	#else
	171	return NULL;
	172	#endif
	173	}
	174
	175	const UInt_t* AliRawReaderDate::GetTriggerPattern() const
	176	{
	177	// get the trigger pattern from the event header
	178
	179	#ifdef ALI_DATE
	180	if (!fEvent) return NULL;
	181	return fEvent->eventTriggerPattern;
	182	#else
	183	return NULL;
	184	#endif
	185	}
	186
	187	const UInt_t* AliRawReaderDate::GetDetectorPattern() const
	188	{
	189	// get the detector pattern from the event header
	190
	191	#ifdef ALI_DATE
	192	if (!fEvent) return NULL;
	193	return fEvent->eventDetectorPattern;
	194	#else
	195	return NULL;
	196	#endif
	197	}
	198
	199	const UInt_t* AliRawReaderDate::GetAttributes() const
	200	{
	201	// get the type attributes from the event header
	202
	203	#ifdef ALI_DATE
	204	if (!fEvent) return NULL;
	205	return fEvent->eventTypeAttribute;
	206	#else
	207	return NULL;
	208	#endif
	209	}
	210
	211	const UInt_t* AliRawReaderDate::GetSubEventAttributes() const
	212	{
	213	// get the type attributes from the sub event header
	214
	215	#ifdef ALI_DATE
	216	if (!fSubEvent) return NULL;
	217	return fSubEvent->eventTypeAttribute;
	218	#else
	219	return NULL;
	220	#endif
	221	}
	222
	223	UInt_t AliRawReaderDate::GetLDCId() const
	224	{
	225	// get the LDC Id from the event header
	226
	227	#ifdef ALI_DATE
	228	if (!fSubEvent) return 0;
	229	return fSubEvent->eventLdcId;
	230	#else
	231	return 0;
	232	#endif
	233	}
	234
	235	UInt_t AliRawReaderDate::GetGDCId() const
	236	{
	237	// get the GDC Id from the event header
	238
	239	#ifdef ALI_DATE
	240	if (!fEvent) return 0;
	241	return fEvent->eventGdcId;
	242	#else
	243	return 0;
	244	#endif
	245	}
	246
	247	UInt_t AliRawReaderDate::GetTimestamp() const
	248	{
	249	// get the timestamp from the event header
	250
	251	#ifdef ALI_DATE
	252	if (!fEvent) return 0;
	253	return fEvent->eventTimestamp;
	254	#else
	255	return 0;
	256	#endif
	257	}
	258
	259	Int_t AliRawReaderDate::GetEquipmentSize() const
	260	{
	261	// get the size of the equipment (including the header)
	262
	263	#ifdef ALI_DATE
	264	if (!fEquipment) return 0;
	265	if (fSubEvent->eventVersion <= 0x00030001) {
	266	return fEquipment->equipmentSize + sizeof(equipmentHeaderStruct);
	267	} else {
	268	return fEquipment->equipmentSize;
	269	}
	270	#else
	271	return 0;
	272	#endif
	273	}
	274
	275	Int_t AliRawReaderDate::GetEquipmentType() const
	276	{
	277	// get the type from the equipment header
	278
	279	#ifdef ALI_DATE
	280	if (!fEquipment) return -1;
	281	return fEquipment->equipmentType;
	282	#else
	283	return 0;
	284	#endif
	285	}
	286
	287	Int_t AliRawReaderDate::GetEquipmentId() const
	288	{
	289	// get the ID from the equipment header
	290
	291	#ifdef ALI_DATE
	292	if (!fEquipment) return -1;
	293	return fEquipment->equipmentId;
	294	#else
	295	return 0;
	296	#endif
	297	}
	298
	299	const UInt_t* AliRawReaderDate::GetEquipmentAttributes() const
	300	{
	301	// get the attributes from the equipment header
	302
	303	#ifdef ALI_DATE
	304	if (!fEquipment) return NULL;
	305	return fEquipment->equipmentTypeAttribute;
	306	#else
	307	return 0;
	308	#endif
	309	}
	310
	311	Int_t AliRawReaderDate::GetEquipmentElementSize() const
	312	{
	313	// get the basic element size from the equipment header
	314
	315	#ifdef ALI_DATE
	316	if (!fEquipment) return 0;
	317	return fEquipment->equipmentBasicElementSize;
	318	#else
	319	return 0;
	320	#endif
	321	}
	322
	323	Int_t AliRawReaderDate::GetEquipmentHeaderSize() const
	324	{
	325	// Get the equipment header size
	326	// 28 bytes by default
	327	#ifdef ALI_DATE
	328	return sizeof(equipmentHeaderStruct);
	329	#else
	330	return 0;
	331	#endif
	332	}
	333
	334	Bool_t AliRawReaderDate::ReadHeader()
	335	{
	336	// read a data header at the current position
	337	// returns kFALSE if the data header could not be read
	338
	339	fErrorCode = 0;
	340
	341	#ifdef ALI_DATE
	342	fHeader = NULL;
	343	if (!fEvent) return kFALSE;
	344	// check whether there are sub events
	345	if (fEvent->eventSize <= fEvent->eventHeadSize) return kFALSE;
	346
	347	do {
	348	// skip payload (if event was not selected)
	349	if (fCount > 0) fPosition += fCount;
	350
	351	// get the first or the next equipment if at the end of an equipment
	352	if (!fEquipment \|\| (fPosition >= fEnd)) {
	353	fEquipment = NULL;
	354
	355	// get the first or the next sub event if at the end of a sub event
	356	if (!fSubEvent \|\|
	357	(fPosition >= ((UChar_t*)fSubEvent) + fSubEvent->eventSize)) {
	358
	359	// check for end of event data
	360	if (fPosition >= ((UChar_t*)fEvent)+fEvent->eventSize) return kFALSE;
	361	if (!TEST_SYSTEM_ATTRIBUTE(fEvent->eventTypeAttribute,
	362	ATTR_SUPER_EVENT)) {
	363	fSubEvent = fEvent; // no super event
	364	} else if (fSubEvent) {
	365	fSubEvent = (eventHeaderStruct) (((UChar_t)fSubEvent) +
	366	fSubEvent->eventSize);
	367	} else {
	368	fSubEvent = (eventHeaderStruct) (((UChar_t)fEvent) +
	369	fEvent->eventHeadSize);
	370	}
	371
	372	// check the magic word of the sub event
	373	if (fSubEvent->eventMagic != EVENT_MAGIC_NUMBER) {
	374	Error("ReadHeader", "wrong magic number in sub event!\n"
	375	" run: %d event: %d %d LDC: %d GDC: %d\n",
	376	fSubEvent->eventRunNb,
	377	fSubEvent->eventId[0], fSubEvent->eventId[1],
	378	fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	379	fErrorCode = kErrMagic;
	380	return kFALSE;
	381	}
	382
	383	// continue if no data in the subevent
	384	if (fSubEvent->eventSize == fSubEvent->eventHeadSize) {
	385	fPosition = fEnd = ((UChar_t*)fSubEvent) + fSubEvent->eventSize;
	386	fCount = 0;
	387	continue;
	388	}
	389
	390	fEquipment = (equipmentHeaderStruct*)
	391	(((UChar_t*)fSubEvent) + fSubEvent->eventHeadSize);
	392
	393	} else {
	394	fEquipment = (equipmentHeaderStruct*) fEnd;
	395	}
	396
	397	fCount = 0;
	398	fPosition = ((UChar_t*)fEquipment) + sizeof(equipmentHeaderStruct);
	399	if (fSubEvent->eventVersion <= 0x00030001) {
	400	fEnd = fPosition + fEquipment->equipmentSize;
	401	} else {
	402	fEnd = ((UChar_t*)fEquipment) + fEquipment->equipmentSize;
	403	}
	404	}
	405
	406	// continue with the next sub event if no data left in the payload
	407	if (fPosition >= fEnd) continue;
	408
	409	if (fRequireHeader) {
	410	// check that there are enough bytes left for the data header
	411	if (fPosition + sizeof(AliRawDataHeader) > fEnd) {
	412	Error("ReadHeader", "could not read data header data!");
	413	Warning("ReadHeader", "skipping %d bytes\n"
	414	" run: %d event: %d %d LDC: %d GDC: %d\n",
	415	fEnd - fPosition, fSubEvent->eventRunNb,
	416	fSubEvent->eventId[0], fSubEvent->eventId[1],
	417	fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	418	fCount = 0;
	419	fPosition = fEnd;
	420	fErrorCode = kErrNoDataHeader;
	421	continue;
	422	}
	423
	424	// "read" the data header
	425	fHeader = (AliRawDataHeader*) fPosition;
	426	if ((fPosition + fHeader->fSize) != fEnd) {
	427	if (fHeader->fSize != 0xFFFFFFFF)
	428	Warning("ReadHeader",
	429	"raw data size found in the header is wrong (%d != %d)! Using the equipment size instead !",
	430	fHeader->fSize, fEnd - fPosition);
	431	fHeader->fSize = fEnd - fPosition;
	432	}
	433	fPosition += sizeof(AliRawDataHeader);
	434	}
	435
	436	if (fHeader && (fHeader->fSize != 0xFFFFFFFF)) {
	437	fCount = fHeader->fSize - sizeof(AliRawDataHeader);
	438
	439	// check consistency of data size in the header and in the sub event
	440	if (fPosition + fCount > fEnd) {
	441	Error("ReadHeader", "size in data header exceeds event size!");
	442	Warning("ReadHeader", "skipping %d bytes\n"
	443	" run: %d event: %d %d LDC: %d GDC: %d\n",
	444	fEnd - fPosition, fSubEvent->eventRunNb,
	445	fSubEvent->eventId[0], fSubEvent->eventId[1],
	446	fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	447	fCount = 0;
	448	fPosition = fEnd;
	449	fErrorCode = kErrSize;
	450	continue;
	451	}
	452
	453	} else {
	454	fCount = fEnd - fPosition;
	455	}
	456
	457	} while (!fEquipment \|\| !IsSelected());
	458
	459	return kTRUE;
	460	#else
	461	return kFALSE;
	462	#endif
	463	}
	464
	465	Bool_t AliRawReaderDate::ReadNextData(UChar_t*& data)
	466	{
	467	// reads the next payload at the current position
	468	// returns kFALSE if the data could not be read
	469
	470	fErrorCode = 0;
	471	while (fCount == 0) {
	472	if (!ReadHeader()) return kFALSE;
	473	}
	474	data = fPosition;
	475	fPosition += fCount;
	476	fCount = 0;
	477	return kTRUE;
	478	}
	479
	480	Bool_t AliRawReaderDate::ReadNext(UChar_t* data, Int_t size)
	481	{
	482	// reads the next block of data at the current position
	483	// returns kFALSE if the data could not be read
	484
	485	fErrorCode = 0;
	486	if (fPosition + size > fEnd) {
	487	Error("ReadNext", "could not read data!");
	488	fErrorCode = kErrOutOfBounds;
	489	return kFALSE;
	490	}
	491	memcpy(data, fPosition, size);
	492	fPosition += size;
	493	fCount -= size;
	494	return kTRUE;
	495	}
	496
	497
	498	Bool_t AliRawReaderDate::Reset()
	499	{
	500	// reset the current position to the beginning of the event
	501
	502	#ifdef ALI_DATE
	503	fSubEvent = NULL;
	504	fEquipment = NULL;
	505	#endif
	506	fCount = 0;
	507	fPosition = fEnd = NULL;
	508	return kTRUE;
	509	}
	510
	511
	512	Bool_t AliRawReaderDate::NextEvent()
	513	{
	514	// go to the next event in the date file
	515
	516	#ifdef ALI_DATE
	517	if (!fFile) return kFALSE;
	518
	519	Reset();
	520	eventHeaderStruct header;
	521	UInt_t headerSize = sizeof(eventHeaderStruct);
	522	if (fEvent) delete[] fEvent;
	523	fEvent = &header;
	524
	525	while (fread(&header, 1, headerSize, fFile) == headerSize) {
	526	if (!IsEventSelected()) {
	527	fseek(fFile, header.eventSize-headerSize, SEEK_CUR);
	528	continue;
	529	}
	530	UChar_t* buffer = new UChar_t[header.eventSize];
	531	fseek(fFile, -(long)headerSize, SEEK_CUR);
	532	if (fread(buffer, 1, header.eventSize, fFile) != header.eventSize) {
	533	Error("NextEvent", "could not read event from file");
	534	delete[] buffer;
	535	break;
	536	}
	537	fEvent = (eventHeaderStruct*) buffer;
	538	fEventNumber++;
	539	return kTRUE;
	540	};
	541
	542	fEvent = NULL;
	543	#endif
	544
	545	return kFALSE;
	546	}
	547
	548	Bool_t AliRawReaderDate::RewindEvents()
	549	{
	550	// go back to the beginning of the date file
	551
	552	if (!fFile) return kFALSE;
	553
	554	fseek(fFile, 0, SEEK_SET);
	555	fEventNumber = -1;
	556	return Reset();
	557	}
	558
	559
	560	Int_t AliRawReaderDate::CheckData() const
	561	{
	562	// check the consistency of the data
	563
	564	#ifdef ALI_DATE
	565	if (!fEvent) return 0;
	566	// check whether there are sub events
	567	if (fEvent->eventSize <= fEvent->eventHeadSize) return 0;
	568
	569	eventHeaderStruct* subEvent = NULL;
	570	UChar_t* position = 0;
	571	UChar_t* end = 0;
	572	Int_t result = 0;
	573
	574	while (kTRUE) {
	575	// get the first or the next sub event if at the end of a sub event
	576	if (!subEvent \|\| (position >= end)) {
	577
	578	// check for end of event data
	579	if (position >= ((UChar_t*)fEvent)+fEvent->eventSize) return result;
	580	if (!TEST_SYSTEM_ATTRIBUTE(fEvent->eventTypeAttribute,
	581	ATTR_SUPER_EVENT)) {
	582	subEvent = fEvent; // no super event
	583	} else if (subEvent) {
	584	subEvent = (eventHeaderStruct) (((UChar_t)subEvent) +
	585	subEvent->eventSize);
	586	} else {
	587	subEvent = (eventHeaderStruct) (((UChar_t)fEvent) +
	588	fEvent->eventHeadSize);
	589	}
	590
	591	// check the magic word of the sub event
	592	if (subEvent->eventMagic != EVENT_MAGIC_NUMBER) {
	593	result \|= kErrMagic;
	594	return result;
	595	}
	596
	597	position = ((UChar_t*)subEvent) + subEvent->eventHeadSize +
	598	sizeof(equipmentHeaderStruct);
	599	end = ((UChar_t*)subEvent) + subEvent->eventSize;
	600	}
	601
	602	// continue with the next sub event if no data left in the payload
	603	if (position >= end) continue;
	604
	605	if (fRequireHeader) {
	606	// check that there are enough bytes left for the data header
	607	if (position + sizeof(AliRawDataHeader) > end) {
	608	result \|= kErrNoDataHeader;
	609	position = end;
	610	continue;
	611	}
	612
	613	// check consistency of data size in the data header and in the sub event
	614	AliRawDataHeader* header = (AliRawDataHeader*) position;
	615	if ((position + header->fSize) != end) {
	616	if (header->fSize != 0xFFFFFFFF)
	617	Warning("ReadHeader",
	618	"raw data size found in the header is wrong (%d != %d)! Using the equipment size instead !",
	619	header->fSize, end - position);
	620	header->fSize = end - position;
	621	result \|= kErrSize;
	622	}
	623	}
	624	position = end;
	625	};
	626
	627	#endif
	628	return 0;
	629	}