[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.                  *
 **************************************************************************/

///////////////////////////////////////////////////////////////////////////////
//
// This is a class for reading a raw data from a date event and providing
// information about digits
//
///////////////////////////////////////////////////////////////////////////////

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

ClassImp(AliRawReaderDate)


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

#ifdef ALI_DATE
  FILE* file = fopen(fileName, "rb");
  if (!file) {
    Error("AliRawReaderDate", "could not open file %s", fileName);
    return;
  }
  eventHeaderStruct header;
  UInt_t headerSize = sizeof(eventHeaderStruct);
  while (fread(&header, 1, headerSize, file) == headerSize) {
    if (eventNumber == 0) {
      UChar_t* buffer = new UChar_t[header.eventSize];
      fseek(file, -headerSize, SEEK_CUR);
      if (fread(buffer, 1, header.eventSize, file) != header.eventSize) break;
      fEvent = (eventHeaderStruct*) buffer;
      fIsOwner = kTRUE;
      break;
    }
    fseek(file, header.eventSize-headerSize, SEEK_CUR);
    eventNumber--;
  }
  fclose(file);

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

AliRawReaderDate::AliRawReaderDate(const AliRawReaderDate& rawReader) :
  AliRawReader(rawReader),
  fRequireHeader(rawReader.fRequireHeader),
  fEvent(rawReader.fEvent),
  fSubEvent(rawReader.fSubEvent),
  fEquipment(rawReader.fEquipment),
  fIsOwner(kFALSE),
  fPosition(rawReader.fPosition),
  fEnd(rawReader.fEnd)

{
// copy constructor

}

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

  this->~AliRawReaderDate();
  new(this) AliRawReaderDate(rawReader);
  return *this;
}

AliRawReaderDate::~AliRawReaderDate()
{
// destructor

#ifdef ALI_DATE
  if (fIsOwner) delete[] fEvent;
#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
}

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
}


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

#ifdef ALI_DATE
  if (!fEquipment) return 0;
  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
}


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
  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)) {

      // 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 (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;
	}

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

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

      fCount = 0;
      fPosition = ((UChar_t*)fEquipment) + sizeof(equipmentHeaderStruct);
      fEnd = fPosition + fEquipment->equipmentSize;
    }

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

    fHeader = NULL;
    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;
      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 (!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;
#endif
  fCount = 0;
  fPosition = fEnd = NULL;
  return kTRUE;
}


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 (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;

    // 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 (fHeader->fSize != 0xFFFFFFFF) {
      if (position + header->fSize > end) {
	result |= kErrSize;
	position = end;
      } else {
	position += header->fSize;
      }
    } else {
      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	///////////////////////////////////////////////////////////////////////////////
	17	//
	18	// This is a class for reading a raw data from a date event and providing
	19	// information about digits
	20	//
	21	///////////////////////////////////////////////////////////////////////////////
	22
	23	#include "AliRawReaderDate.h"
	24	#ifdef ALI_DATE
	25	#include "event.h"
	26	#endif
	27
	28	ClassImp(AliRawReaderDate)
	29
	30
	31	AliRawReaderDate::AliRawReaderDate(
	32	#ifdef ALI_DATE
	33	void* event
	34	#else
	35	void* /* event */
	36	#endif
	37	) :
	38	fRequireHeader(kTRUE),
	39	fEvent(NULL),
	40	fSubEvent(NULL),
	41	fEquipment(NULL),
	42	fIsOwner(kFALSE),
	43	fPosition(NULL),
	44	fEnd(NULL)
	45	{
	46	// create an object to read digits from the given date event
	47
	48	#ifdef ALI_DATE
	49	fEvent = (eventHeaderStruct*) event;
	50	#else
	51	Fatal("AliRawReaderDate", "this class was compiled without DATE");
	52	#endif
	53	}
	54
	55	AliRawReaderDate::AliRawReaderDate(
	56	#ifdef ALI_DATE
	57	const char* fileName, Int_t eventNumber
	58	#else
	59	const char* /fileName/,
	60	Int_t /eventNumber/
	61	#endif
	62	) :
	63	fRequireHeader(kTRUE),
	64	fEvent(NULL),
	65	fSubEvent(NULL),
	66	fEquipment(NULL),
	67	fIsOwner(kFALSE),
	68	fPosition(NULL),
	69	fEnd(NULL)
	70	{
	71	// create an object to read digits from the given date event
	72
	73	#ifdef ALI_DATE
	74	FILE* file = fopen(fileName, "rb");
	75	if (!file) {
	76	Error("AliRawReaderDate", "could not open file %s", fileName);
	77	return;
	78	}
	79	eventHeaderStruct header;
	80	UInt_t headerSize = sizeof(eventHeaderStruct);
	81	while (fread(&header, 1, headerSize, file) == headerSize) {
	82	if (eventNumber == 0) {
	83	UChar_t* buffer = new UChar_t[header.eventSize];
	84	fseek(file, -headerSize, SEEK_CUR);
	85	if (fread(buffer, 1, header.eventSize, file) != header.eventSize) break;
	86	fEvent = (eventHeaderStruct*) buffer;
	87	fIsOwner = kTRUE;
	88	break;
	89	}
	90	fseek(file, header.eventSize-headerSize, SEEK_CUR);
	91	eventNumber--;
	92	}
	93	fclose(file);
	94
	95	#else
	96	Fatal("AliRawReaderDate", "this class was compiled without DATE");
	97	#endif
	98	}
	99
	100	AliRawReaderDate::AliRawReaderDate(const AliRawReaderDate& rawReader) :
	101	AliRawReader(rawReader),
	102	fRequireHeader(rawReader.fRequireHeader),
	103	fEvent(rawReader.fEvent),
	104	fSubEvent(rawReader.fSubEvent),
	105	fEquipment(rawReader.fEquipment),
	106	fIsOwner(kFALSE),
	107	fPosition(rawReader.fPosition),
	108	fEnd(rawReader.fEnd)
	109
	110	{
	111	// copy constructor
	112
	113	}
	114
	115	AliRawReaderDate& AliRawReaderDate::operator = (const AliRawReaderDate&
	116	rawReader)
	117	{
	118	// assignment operator
	119
	120	this->~AliRawReaderDate();
	121	new(this) AliRawReaderDate(rawReader);
	122	return *this;
	123	}
	124
	125	AliRawReaderDate::~AliRawReaderDate()
	126	{
	127	// destructor
	128
	129	#ifdef ALI_DATE
	130	if (fIsOwner) delete[] fEvent;
	131	#endif
	132	}
	133
	134
	135	UInt_t AliRawReaderDate::GetType() const
	136	{
	137	// get the type from the event header
	138
	139	#ifdef ALI_DATE
	140	if (!fEvent) return 0;
	141	return fEvent->eventType;
	142	#else
	143	return 0;
	144	#endif
	145	}
	146
	147	UInt_t AliRawReaderDate::GetRunNumber() const
	148	{
	149	// get the run number from the event header
	150
	151	#ifdef ALI_DATE
	152	if (!fEvent) return 0;
	153	return fEvent->eventRunNb;
	154	#else
	155	return 0;
	156	#endif
	157	}
	158
	159	const UInt_t* AliRawReaderDate::GetEventId() const
	160	{
	161	// get the event id from the event header
	162
	163	#ifdef ALI_DATE
	164	if (!fEvent) return NULL;
	165	return fEvent->eventId;
	166	#else
	167	return NULL;
	168	#endif
	169	}
	170
	171	const UInt_t* AliRawReaderDate::GetTriggerPattern() const
	172	{
	173	// get the trigger pattern from the event header
	174
	175	#ifdef ALI_DATE
	176	if (!fEvent) return NULL;
	177	return fEvent->eventTriggerPattern;
	178	#else
	179	return NULL;
	180	#endif
	181	}
	182
	183	const UInt_t* AliRawReaderDate::GetDetectorPattern() const
	184	{
	185	// get the detector pattern from the event header
	186
	187	#ifdef ALI_DATE
	188	if (!fEvent) return NULL;
	189	return fEvent->eventDetectorPattern;
	190	#else
	191	return NULL;
	192	#endif
	193	}
	194
	195	const UInt_t* AliRawReaderDate::GetAttributes() const
	196	{
	197	// get the type attributes from the event header
	198
	199	#ifdef ALI_DATE
	200	if (!fEvent) return NULL;
	201	return fEvent->eventTypeAttribute;
	202	#else
	203	return NULL;
	204	#endif
	205	}
	206
	207	UInt_t AliRawReaderDate::GetLDCId() const
	208	{
	209	// get the LDC Id from the event header
	210
	211	#ifdef ALI_DATE
	212	if (!fSubEvent) return 0;
	213	return fSubEvent->eventLdcId;
	214	#else
	215	return 0;
	216	#endif
	217	}
	218
	219	UInt_t AliRawReaderDate::GetGDCId() const
	220	{
	221	// get the GDC Id from the event header
	222
	223	#ifdef ALI_DATE
	224	if (!fEvent) return 0;
	225	return fEvent->eventGdcId;
	226	#else
	227	return 0;
	228	#endif
	229	}
	230
	231
	232	Int_t AliRawReaderDate::GetEquipmentSize() const
	233	{
	234	// get the size of the equipment
	235
	236	#ifdef ALI_DATE
	237	if (!fEquipment) return 0;
	238	return fEquipment->equipmentSize;
	239	#else
	240	return 0;
	241	#endif
	242	}
	243
	244	Int_t AliRawReaderDate::GetEquipmentType() const
	245	{
	246	// get the type from the equipment header
	247
	248	#ifdef ALI_DATE
	249	if (!fEquipment) return -1;
	250	return fEquipment->equipmentType;
	251	#else
	252	return 0;
	253	#endif
	254	}
	255
	256	Int_t AliRawReaderDate::GetEquipmentId() const
	257	{
	258	// get the ID from the equipment header
	259
	260	#ifdef ALI_DATE
	261	if (!fEquipment) return -1;
	262	return fEquipment->equipmentId;
	263	#else
	264	return 0;
	265	#endif
	266	}
	267
	268	const UInt_t* AliRawReaderDate::GetEquipmentAttributes() const
	269	{
	270	// get the attributes from the equipment header
	271
	272	#ifdef ALI_DATE
	273	if (!fEquipment) return NULL;
	274	return fEquipment->equipmentTypeAttribute;
	275	#else
	276	return 0;
	277	#endif
	278	}
	279
	280	Int_t AliRawReaderDate::GetEquipmentElementSize() const
	281	{
	282	// get the basic element size from the equipment header
	283
	284	#ifdef ALI_DATE
	285	if (!fEquipment) return 0;
	286	return fEquipment->equipmentBasicElementSize;
	287	#else
	288	return 0;
	289	#endif
	290	}
	291
	292
	293	Bool_t AliRawReaderDate::ReadHeader()
	294	{
	295	// read a data header at the current position
	296	// returns kFALSE if the data header could not be read
	297
	298	fErrorCode = 0;
	299
	300	#ifdef ALI_DATE
	301	if (!fEvent) return kFALSE;
	302	// check whether there are sub events
	303	if (fEvent->eventSize <= fEvent->eventHeadSize) return kFALSE;
	304
	305	do {
	306	// skip payload (if event was not selected)
	307	if (fCount > 0) fPosition += fCount;
	308
	309	// get the first or the next equipment if at the end of an equipment
	310	if (!fEquipment \|\| (fPosition >= fEnd)) {
	311
	312	// get the first or the next sub event if at the end of a sub event
	313	if (!fSubEvent \|\|
	314	(fPosition >= ((UChar_t*)fSubEvent) + fSubEvent->eventSize)) {
	315
	316	// check for end of event data
	317	if (fPosition >= ((UChar_t*)fEvent)+fEvent->eventSize) return kFALSE;
	318	if (fSubEvent) {
	319	fSubEvent = (eventHeaderStruct) (((UChar_t)fSubEvent) +
	320	fSubEvent->eventSize);
	321	} else {
	322	fSubEvent = (eventHeaderStruct) (((UChar_t)fEvent) +
	323	fEvent->eventHeadSize);
	324	}
	325
	326	// check the magic word of the sub event
	327	if (fSubEvent->eventMagic != EVENT_MAGIC_NUMBER) {
	328	Error("ReadHeader", "wrong magic number in sub event!\n"
	329	" run: %d event: %d %d LDC: %d GDC: %d\n",
	330	fSubEvent->eventRunNb,
	331	fSubEvent->eventId[0], fSubEvent->eventId[1],
	332	fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	333	fErrorCode = kErrMagic;
	334	return kFALSE;
	335	}
	336
	337	fEquipment = (equipmentHeaderStruct*)
	338	(((UChar_t*)fSubEvent) + fSubEvent->eventHeadSize);
	339
	340	} else {
	341	fEquipment = (equipmentHeaderStruct*) fEnd;
	342	}
	343
	344	fCount = 0;
	345	fPosition = ((UChar_t*)fEquipment) + sizeof(equipmentHeaderStruct);
	346	fEnd = fPosition + fEquipment->equipmentSize;
	347	}
	348
	349	// continue with the next sub event if no data left in the payload
	350	if (fPosition >= fEnd) continue;
	351
	352	fHeader = NULL;
	353	if (fRequireHeader) {
	354	// check that there are enough bytes left for the data header
	355	if (fPosition + sizeof(AliRawDataHeader) > fEnd) {
	356	Error("ReadHeader", "could not read data header data!");
	357	Warning("ReadHeader", "skipping %d bytes\n"
	358	" run: %d event: %d %d LDC: %d GDC: %d\n",
	359	fEnd - fPosition, fSubEvent->eventRunNb,
	360	fSubEvent->eventId[0], fSubEvent->eventId[1],
	361	fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	362	fCount = 0;
	363	fPosition = fEnd;
	364	fErrorCode = kErrNoDataHeader;
	365	continue;
	366	}
	367
	368	// "read" the data header
	369	fHeader = (AliRawDataHeader*) fPosition;
	370	fPosition += sizeof(AliRawDataHeader);
	371	}
	372
	373	if (fHeader && (fHeader->fSize != 0xFFFFFFFF)) {
	374	fCount = fHeader->fSize - sizeof(AliRawDataHeader);
	375
	376	// check consistency of data size in the header and in the sub event
	377	if (fPosition + fCount > fEnd) {
	378	Error("ReadHeader", "size in data header exceeds event size!");
	379	Warning("ReadHeader", "skipping %d bytes\n"
	380	" run: %d event: %d %d LDC: %d GDC: %d\n",
	381	fEnd - fPosition, fSubEvent->eventRunNb,
	382	fSubEvent->eventId[0], fSubEvent->eventId[1],
	383	fSubEvent->eventLdcId, fSubEvent->eventGdcId);
	384	fCount = 0;
	385	fPosition = fEnd;
	386	fErrorCode = kErrSize;
	387	continue;
	388	}
	389
	390	} else {
	391	fCount = fEnd - fPosition;
	392	}
	393
	394	} while (!IsSelected());
	395
	396	return kTRUE;
	397	#else
	398	return kFALSE;
	399	#endif
	400	}
	401
	402	Bool_t AliRawReaderDate::ReadNextData(UChar_t*& data)
	403	{
	404	// reads the next payload at the current position
	405	// returns kFALSE if the data could not be read
	406
	407	fErrorCode = 0;
	408	while (fCount == 0) {
	409	if (!ReadHeader()) return kFALSE;
	410	}
	411	data = fPosition;
	412	fPosition += fCount;
	413	fCount = 0;
	414	return kTRUE;
	415	}
	416
	417	Bool_t AliRawReaderDate::ReadNext(UChar_t* data, Int_t size)
	418	{
	419	// reads the next block of data at the current position
	420	// returns kFALSE if the data could not be read
	421
	422	fErrorCode = 0;
	423	if (fPosition + size > fEnd) {
	424	Error("ReadNext", "could not read data!");
	425	fErrorCode = kErrOutOfBounds;
	426	return kFALSE;
	427	}
	428	memcpy(data, fPosition, size);
	429	fPosition += size;
	430	fCount -= size;
	431	return kTRUE;
	432	}
	433
	434
	435	Bool_t AliRawReaderDate::Reset()
	436	{
	437	// reset the current position to the beginning of the event
	438
	439	#ifdef ALI_DATE
	440	fSubEvent = NULL;
	441	#endif
	442	fCount = 0;
	443	fPosition = fEnd = NULL;
	444	return kTRUE;
	445	}
	446
	447
	448	Int_t AliRawReaderDate::CheckData() const
	449	{
	450	// check the consistency of the data
	451
	452	#ifdef ALI_DATE
	453	if (!fEvent) return 0;
	454	// check whether there are sub events
	455	if (fEvent->eventSize <= fEvent->eventHeadSize) return 0;
	456
	457	eventHeaderStruct* subEvent = NULL;
	458	UChar_t* position = 0;
	459	UChar_t* end = 0;
	460	Int_t result = 0;
	461
	462	while (kTRUE) {
	463	// get the first or the next sub event if at the end of a sub event
	464	if (!subEvent \|\| (position >= end)) {
	465
	466	// check for end of event data
	467	if (position >= ((UChar_t*)fEvent)+fEvent->eventSize) return result;
	468	if (subEvent) {
	469	subEvent = (eventHeaderStruct) (((UChar_t)subEvent) +
	470	subEvent->eventSize);
	471	} else {
	472	subEvent = (eventHeaderStruct) (((UChar_t)fEvent) +
	473	fEvent->eventHeadSize);
	474	}
	475
	476	// check the magic word of the sub event
	477	if (subEvent->eventMagic != EVENT_MAGIC_NUMBER) {
	478	result \|= kErrMagic;
	479	return result;
	480	}
	481
	482	position = ((UChar_t*)subEvent) + subEvent->eventHeadSize +
	483	sizeof(equipmentHeaderStruct);
	484	end = ((UChar_t*)subEvent) + subEvent->eventSize;
	485	}
	486
	487	// continue with the next sub event if no data left in the payload
	488	if (position >= end) continue;
	489
	490	// check that there are enough bytes left for the data header
	491	if (position + sizeof(AliRawDataHeader) > end) {
	492	result \|= kErrNoDataHeader;
	493	position = end;
	494	continue;
	495	}
	496
	497	// check consistency of data size in the data header and in the sub event
	498	AliRawDataHeader* header = (AliRawDataHeader*) position;
	499	if (fHeader->fSize != 0xFFFFFFFF) {
	500	if (position + header->fSize > end) {
	501	result \|= kErrSize;
	502	position = end;
	503	} else {
	504	position += header->fSize;
	505	}
	506	} else {
	507	position = end;
	508	}
	509	};
	510
	511	#endif
	512	return 0;
	513	}