[u/mrichter/AliRoot.git] / RAW / AliRawReaderDateV3.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 (version 3).
///
/// The AliRawReaderDateV3 is constructed either with a pointer to a
/// date event or with a file name and an event number.
///
///////////////////////////////////////////////////////////////////////////////

#include "AliRawReaderDateV3.h"

struct eventHeaderStruct { 
  Int_t  size;          /* size of event in Bytes  */
  UInt_t magic;         /* magic number used for consistency check */
  UInt_t type;          /* event type */
  UInt_t headLen;       /* size of header in bytes */
  UInt_t runNb;         /* run number */
  UInt_t burstNb;       /* burst number */
  UInt_t nbInRun;       /* event number in run */
  UInt_t nbInBurst;     /* event number in burst */
  UInt_t triggerNb;     /* trigger number for this detector */
  UInt_t fileSeqNb;     /* file sequence number for multifiles run */
  UInt_t detectorId[3]; /* detector identification */
  UInt_t time;          /* time in seconds since 0.00 GMT 1.1.1970 */
  UInt_t usec;          /* microseconds */
  UInt_t errorCode;
  UInt_t deadTime;
  UInt_t deadTimeusec;
  UInt_t typeAttribute[2]; /* event type id mask */
};

#define EVENT_MAGIC_NUMBER         ((UInt_t)0xDA1E5AFE)


ClassImp(AliRawReaderDateV3)


AliRawReaderDateV3::AliRawReaderDateV3(void* event) :
  fFile(NULL),
  fEvent(NULL),
  fSubEvent(NULL),
  fPosition(NULL),
  fEnd(NULL)
{
// create an object to read digits from the given date event

  fEvent = (eventHeaderStruct*) event;
}

AliRawReaderDateV3::AliRawReaderDateV3(const char* fileName, 
				       Int_t eventNumber) :
  fFile(NULL),
  fEvent(NULL),
  fSubEvent(NULL),
  fPosition(NULL),
  fEnd(NULL)
{
// create an object to read digits from the given date event

  fFile = fopen(fileName, "rb");
  if (!fFile) {
    Error("AliRawReaderDateV3", "could not open file %s", fileName);
    fIsValid = kFALSE;
    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.size];
      fseek(fFile, -(long)headerSize, SEEK_CUR);
      if (Int_t(fread(buffer, 1, header.size, fFile)) != header.size) break;
      fEvent = (eventHeaderStruct*) buffer;
      break;
    }
    fseek(fFile, header.size-headerSize, SEEK_CUR);
    eventNumber--;
  }
}

AliRawReaderDateV3::AliRawReaderDateV3(const AliRawReaderDateV3& rawReader) :
  AliRawReader(rawReader),
  fFile(rawReader.fFile),
  fEvent(rawReader.fEvent),
  fSubEvent(rawReader.fSubEvent),
  fPosition(rawReader.fPosition),
  fEnd(rawReader.fEnd)

{
// copy constructor

  Fatal("AliRawReaderDateV3", "copy constructor not implemented");
}

AliRawReaderDateV3& AliRawReaderDateV3::operator = (const AliRawReaderDateV3& 
						/*rawReader*/)
{
// assignment operator

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

AliRawReaderDateV3::~AliRawReaderDateV3()
{
// destructor

  if (fFile) {
    delete[] fEvent;
    fclose(fFile);
  }
}


UInt_t AliRawReaderDateV3::GetType() const
{
// get the type from the event header

  if (!fEvent) return 0;
  return fEvent->type;
}

UInt_t AliRawReaderDateV3::GetRunNumber() const
{
// get the run number from the event header

  if (!fEvent) return 0;
  return fEvent->runNb;
}

const UInt_t* AliRawReaderDateV3::GetEventId() const
{
// get the event id from the event header

  if (!fEvent) return NULL;
  return &(fEvent->nbInRun);
}

const UInt_t* AliRawReaderDateV3::GetTriggerPattern() const
{
// get the trigger pattern from the event header

  return NULL;
}

const UInt_t* AliRawReaderDateV3::GetDetectorPattern() const
{
// get the detector pattern from the event header

  if (!fEvent) return NULL;
  return fEvent->detectorId;
}

const UInt_t* AliRawReaderDateV3::GetAttributes() const
{
// get the type attributes from the event header

  if (!fEvent) return NULL;
  return fEvent->typeAttribute;
}

const UInt_t* AliRawReaderDateV3::GetSubEventAttributes() const
{
// get the type attributes from the sub event header

  if (!fSubEvent) return NULL;
  return fSubEvent->typeAttribute;
}

UInt_t AliRawReaderDateV3::GetLDCId() const
{
// get the LDC Id from the event header

  return UInt_t(-1);
}

UInt_t AliRawReaderDateV3::GetGDCId() const
{
// get the GDC Id from the event header

  return UInt_t(-1);
}

UInt_t AliRawReaderDateV3::GetTimestamp() const
{
// get the timestamp from the event header

  if (!fEvent) return 0;
  return fEvent->time;
}

Int_t AliRawReaderDateV3::GetEquipmentSize() const
{
// get the size of the equipment

  if (!fSubEvent) return 0;
  return fSubEvent->size;
}

Int_t AliRawReaderDateV3::GetEquipmentType() const
{
// get the type from the equipment header

  return 0;
}

Int_t AliRawReaderDateV3::GetEquipmentId() const
{
// get the ID from the equipment header

  return 0;
}

const UInt_t* AliRawReaderDateV3::GetEquipmentAttributes() const
{
// get the attributes from the equipment header

  return 0;
}

Int_t AliRawReaderDateV3::GetEquipmentElementSize() const
{
// get the basic element size from the equipment header

  return 0;
}

Int_t AliRawReaderDateV3::GetEquipmentHeaderSize() const
{
// get the size of the equipment header

  return 0;
}

Bool_t AliRawReaderDateV3::ReadHeader()
{
// read a data header at the current position
// returns kFALSE if the data header could not be read

  fErrorCode = 0;

  fHeader = NULL;
  if (!fEvent) return kFALSE;
  // check whether there are sub events
  if (fEvent->size <= Int_t(fEvent->headLen)) return kFALSE;

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

    // check for end of event data
    if (fPosition >= ((UChar_t*)fEvent)+fEvent->size) return kFALSE;
    if ((fEvent->detectorId[2] & 0x8000) != 0x8000) {
      fSubEvent = fEvent;   // no super event
    } else if (fSubEvent) {
      fSubEvent = (eventHeaderStruct*) (((UChar_t*)fSubEvent) + 
					fSubEvent->size);
    } else {
      fSubEvent = (eventHeaderStruct*) (((UChar_t*)fEvent) + 
					fEvent->headLen);
    }

    // check the magic word of the sub event
    if (fSubEvent->magic != EVENT_MAGIC_NUMBER) {
      Error("ReadHeader", "wrong magic number in sub event!\n"
	    " run: %d  event: %d\n", 
	    fSubEvent->runNb, fSubEvent->nbInRun);
      fErrorCode = kErrMagic;
      return kFALSE;
    }

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

    fCount = 0;
    fPosition = ((UChar_t*)fSubEvent) + sizeof(eventHeaderStruct);
    fEnd = ((UChar_t*)fSubEvent) + fSubEvent->size;

    // 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 %ld bytes\n"
		" run: %d  event: %d\n", 
		fEnd - fPosition, fSubEvent->runNb, fSubEvent->nbInRun);
	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 != %ld)! 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 %ld bytes\n"
		" run: %d  event: %d\n", 
		fEnd - fPosition, fSubEvent->runNb, fSubEvent->nbInRun);
	fCount = 0;
	fPosition = fEnd;
	fErrorCode = kErrSize;
	continue;
      }

    } else {
      fCount = fEnd - fPosition;
    }

  } while (!IsSelected());

  return kTRUE;
}

Bool_t AliRawReaderDateV3::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 AliRawReaderDateV3::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 AliRawReaderDateV3::Reset()
{
// reset the current position to the beginning of the event

  fSubEvent = NULL;
  fCount = 0;
  fPosition = fEnd = NULL;
  return kTRUE;
}


Bool_t AliRawReaderDateV3::NextEvent()
{
// go to the next event in the date file

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

  fEvent = NULL;
  return kFALSE;
}

Bool_t AliRawReaderDateV3::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 AliRawReaderDateV3::CheckData() const
{
// check the consistency of the data

  if (!fEvent) return 0;
  // check whether there are sub events
  if (fEvent->size <= Int_t(fEvent->headLen)) return 0;

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

  while (kTRUE) {
    // check for end of event data
    if (position >= ((UChar_t*)fEvent)+fEvent->size) return result;
    if ((fEvent->detectorId[2] & 0x8000) != 0x8000) {
      subEvent = fEvent;   // no super event
    } else if (subEvent) {
      subEvent = (eventHeaderStruct*) (((UChar_t*)subEvent) + 
				       subEvent->size);
    } else {
      subEvent = (eventHeaderStruct*) (((UChar_t*)fEvent) + 
				       fEvent->headLen);
    }

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

    position = ((UChar_t*)subEvent) + subEvent->headLen;
    end = ((UChar_t*)subEvent) + subEvent->size;

    // 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 != %ld)! Using the equipment size instead !",
		  header->fSize, end - position);
	header->fSize = end - position;
	result |= kErrSize;
      }
    }
    position = end;
  };

  return 0;
}
Commit	Line	Data
29a569c4	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 (version 3).
	21	///
	22	/// The AliRawReaderDateV3 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 "AliRawReaderDateV3.h"
	28
	29	struct eventHeaderStruct {
	30	Int_t size; /* size of event in Bytes */
	31	UInt_t magic; /* magic number used for consistency check */
	32	UInt_t type; /* event type */
	33	UInt_t headLen; /* size of header in bytes */
	34	UInt_t runNb; /* run number */
	35	UInt_t burstNb; /* burst number */
	36	UInt_t nbInRun; /* event number in run */
	37	UInt_t nbInBurst; /* event number in burst */
	38	UInt_t triggerNb; /* trigger number for this detector */
	39	UInt_t fileSeqNb; /* file sequence number for multifiles run */
	40	UInt_t detectorId[3]; /* detector identification */
	41	UInt_t time; /* time in seconds since 0.00 GMT 1.1.1970 */
	42	UInt_t usec; /* microseconds */
	43	UInt_t errorCode;
	44	UInt_t deadTime;
	45	UInt_t deadTimeusec;
	46	UInt_t typeAttribute[2]; /* event type id mask */
	47	};
	48
	49	#define EVENT_MAGIC_NUMBER ((UInt_t)0xDA1E5AFE)
	50
	51
	52	ClassImp(AliRawReaderDateV3)
	53
	54
	55	AliRawReaderDateV3::AliRawReaderDateV3(void* event) :
29a569c4	56	fFile(NULL),
	57	fEvent(NULL),
	58	fSubEvent(NULL),
	59	fPosition(NULL),
	60	fEnd(NULL)
	61	{
	62	// create an object to read digits from the given date event
	63
	64	fEvent = (eventHeaderStruct*) event;
	65	}
	66
	67	AliRawReaderDateV3::AliRawReaderDateV3(const char* fileName,
	68	Int_t eventNumber) :
29a569c4	69	fFile(NULL),
	70	fEvent(NULL),
	71	fSubEvent(NULL),
	72	fPosition(NULL),
	73	fEnd(NULL)
	74	{
	75	// create an object to read digits from the given date event
	76
	77	fFile = fopen(fileName, "rb");
	78	if (!fFile) {
	79	Error("AliRawReaderDateV3", "could not open file %s", fileName);
a97af23d	80	fIsValid = kFALSE;
29a569c4	81	return;
	82	}
	83	if (eventNumber < 0) return;
	84
	85	eventHeaderStruct header;
	86	UInt_t headerSize = sizeof(eventHeaderStruct);
	87	while (fread(&header, 1, headerSize, fFile) == headerSize) {
	88	if (eventNumber == 0) {
	89	UChar_t* buffer = new UChar_t[header.size];
b91d160c	90	fseek(fFile, -(long)headerSize, SEEK_CUR);
29a569c4	91	if (Int_t(fread(buffer, 1, header.size, fFile)) != header.size) break;
	92	fEvent = (eventHeaderStruct*) buffer;
	93	break;
	94	}
	95	fseek(fFile, header.size-headerSize, SEEK_CUR);
	96	eventNumber--;
	97	}
	98	}
	99
	100	AliRawReaderDateV3::AliRawReaderDateV3(const AliRawReaderDateV3& rawReader) :
	101	AliRawReader(rawReader),
29a569c4	102	fFile(rawReader.fFile),
	103	fEvent(rawReader.fEvent),
	104	fSubEvent(rawReader.fSubEvent),
	105	fPosition(rawReader.fPosition),
	106	fEnd(rawReader.fEnd)
	107
	108	{
	109	// copy constructor
	110
	111	Fatal("AliRawReaderDateV3", "copy constructor not implemented");
	112	}
	113
	114	AliRawReaderDateV3& AliRawReaderDateV3::operator = (const AliRawReaderDateV3&
	115	/rawReader/)
	116	{
	117	// assignment operator
	118
	119	Fatal("operator =", "assignment operator not implemented");
	120	return *this;
	121	}
	122
	123	AliRawReaderDateV3::~AliRawReaderDateV3()
	124	{
	125	// destructor
	126
	127	if (fFile) {
	128	delete[] fEvent;
	129	fclose(fFile);
	130	}
	131	}
	132
	133
	134	UInt_t AliRawReaderDateV3::GetType() const
	135	{
	136	// get the type from the event header
	137
	138	if (!fEvent) return 0;
	139	return fEvent->type;
	140	}
	141
	142	UInt_t AliRawReaderDateV3::GetRunNumber() const
	143	{
	144	// get the run number from the event header
	145
	146	if (!fEvent) return 0;
	147	return fEvent->runNb;
	148	}
	149
	150	const UInt_t* AliRawReaderDateV3::GetEventId() const
	151	{
	152	// get the event id from the event header
	153
	154	if (!fEvent) return NULL;
	155	return &(fEvent->nbInRun);
	156	}
	157
	158	const UInt_t* AliRawReaderDateV3::GetTriggerPattern() const
	159	{
	160	// get the trigger pattern from the event header
	161
	162	return NULL;
	163	}
	164
	165	const UInt_t* AliRawReaderDateV3::GetDetectorPattern() const
166	{
167	// get the detector pattern from the event header
168
169	if (!fEvent) return NULL;
170	return fEvent->detectorId;
171	}
172
173	const UInt_t* AliRawReaderDateV3::GetAttributes() const
174	{
175	// get the type attributes from the event header
176
177	if (!fEvent) return NULL;
178	return fEvent->typeAttribute;
179	}
180
181	const UInt_t* AliRawReaderDateV3::GetSubEventAttributes() const
182	{
183	// get the type attributes from the sub event header
184
185	if (!fSubEvent) return NULL;
186	return fSubEvent->typeAttribute;
187	}
188
189	UInt_t AliRawReaderDateV3::GetLDCId() const
190	{
191	// get the LDC Id from the event header
192
193	return UInt_t(-1);
194	}
195
196	UInt_t AliRawReaderDateV3::GetGDCId() const
197	{
198	// get the GDC Id from the event header
199
200	return UInt_t(-1);
201	}
202
741c154c	203	UInt_t AliRawReaderDateV3::GetTimestamp() const
	204	{
	205	// get the timestamp from the event header
	206
	207	if (!fEvent) return 0;
	208	return fEvent->time;
	209	}
29a569c4	210
	211	Int_t AliRawReaderDateV3::GetEquipmentSize() const
	212	{
	213	// get the size of the equipment
	214
	215	if (!fSubEvent) return 0;
	216	return fSubEvent->size;
	217	}
	218
	219	Int_t AliRawReaderDateV3::GetEquipmentType() const
	220	{
	221	// get the type from the equipment header
	222
	223	return 0;
	224	}
	225
	226	Int_t AliRawReaderDateV3::GetEquipmentId() const
	227	{
	228	// get the ID from the equipment header
	229
	230	return 0;
	231	}
	232
	233	const UInt_t* AliRawReaderDateV3::GetEquipmentAttributes() const
	234	{
	235	// get the attributes from the equipment header
	236
	237	return 0;
	238	}
	239
	240	Int_t AliRawReaderDateV3::GetEquipmentElementSize() const
	241	{
	242	// get the basic element size from the equipment header
	243
	244	return 0;
	245	}
	246
299738b9	247	Int_t AliRawReaderDateV3::GetEquipmentHeaderSize() const
	248	{
	249	// get the size of the equipment header
	250
	251	return 0;
	252	}
29a569c4	253
	254	Bool_t AliRawReaderDateV3::ReadHeader()
	255	{
	256	// read a data header at the current position
	257	// returns kFALSE if the data header could not be read
	258
	259	fErrorCode = 0;
	260
	261	fHeader = NULL;
	262	if (!fEvent) return kFALSE;
	263	// check whether there are sub events
	264	if (fEvent->size <= Int_t(fEvent->headLen)) return kFALSE;
	265
	266	do {
	267	// skip payload (if event was not selected)
	268	if (fCount > 0) fPosition += fCount;
	269
	270	// check for end of event data
	271	if (fPosition >= ((UChar_t*)fEvent)+fEvent->size) return kFALSE;
2512bc59	272	if ((fEvent->detectorId[2] & 0x8000) != 0x8000) {
29a569c4	273	fSubEvent = fEvent; // no super event
	274	} else if (fSubEvent) {
	275	fSubEvent = (eventHeaderStruct) (((UChar_t)fSubEvent) +
	276	fSubEvent->size);
	277	} else {
	278	fSubEvent = (eventHeaderStruct) (((UChar_t)fEvent) +
	279	fEvent->headLen);
	280	}
	281
	282	// check the magic word of the sub event
	283	if (fSubEvent->magic != EVENT_MAGIC_NUMBER) {
	284	Error("ReadHeader", "wrong magic number in sub event!\n"
	285	" run: %d event: %d\n",
	286	fSubEvent->runNb, fSubEvent->nbInRun);
	287	fErrorCode = kErrMagic;
	288	return kFALSE;
	289	}
	290
	291	// continue if no data in the subevent
	292	if (fSubEvent->size == Int_t(fSubEvent->headLen)) {
	293	fPosition = fEnd = ((UChar_t*)fSubEvent) + fSubEvent->size;
	294	fCount = 0;
	295	continue;
	296	}
	297
	298	fCount = 0;
	299	fPosition = ((UChar_t*)fSubEvent) + sizeof(eventHeaderStruct);
	300	fEnd = ((UChar_t*)fSubEvent) + fSubEvent->size;
	301
	302	// continue with the next sub event if no data left in the payload
	303	if (fPosition >= fEnd) continue;
	304
	305	if (fRequireHeader) {
	306	// check that there are enough bytes left for the data header
	307	if (fPosition + sizeof(AliRawDataHeader) > fEnd) {
	308	Error("ReadHeader", "could not read data header data!");
6c12d59f	309	Warning("ReadHeader", "skipping %ld bytes\n"
29a569c4	310	" run: %d event: %d\n",
	311	fEnd - fPosition, fSubEvent->runNb, fSubEvent->nbInRun);
	312	fCount = 0;
	313	fPosition = fEnd;
	314	fErrorCode = kErrNoDataHeader;
	315	continue;
	316	}
	317
	318	// "read" the data header
	319	fHeader = (AliRawDataHeader*) fPosition;
299738b9	320	if ((fPosition + fHeader->fSize) != fEnd) {
806e573c	321	if (fHeader->fSize != 0xFFFFFFFF)
806e573c	322	Warning("ReadHeader",
6c12d59f	323	"raw data size found in the header is wrong (%d != %ld)! Using the equipment size instead !",
806e573c	324	fHeader->fSize, fEnd - fPosition);
299738b9	325	fHeader->fSize = fEnd - fPosition;
299738b9	326	}
29a569c4	327	fPosition += sizeof(AliRawDataHeader);
	328	}
	329
	330	if (fHeader && (fHeader->fSize != 0xFFFFFFFF)) {
	331	fCount = fHeader->fSize - sizeof(AliRawDataHeader);
	332
	333	// check consistency of data size in the header and in the sub event
	334	if (fPosition + fCount > fEnd) {
	335	Error("ReadHeader", "size in data header exceeds event size!");
6c12d59f	336	Warning("ReadHeader", "skipping %ld bytes\n"
29a569c4	337	" run: %d event: %d\n",
	338	fEnd - fPosition, fSubEvent->runNb, fSubEvent->nbInRun);
	339	fCount = 0;
	340	fPosition = fEnd;
	341	fErrorCode = kErrSize;
	342	continue;
	343	}
	344
	345	} else {
	346	fCount = fEnd - fPosition;
	347	}
	348
	349	} while (!IsSelected());
	350
	351	return kTRUE;
	352	}
	353
	354	Bool_t AliRawReaderDateV3::ReadNextData(UChar_t*& data)
	355	{
	356	// reads the next payload at the current position
	357	// returns kFALSE if the data could not be read
	358
	359	fErrorCode = 0;
	360	while (fCount == 0) {
	361	if (!ReadHeader()) return kFALSE;
	362	}
	363	data = fPosition;
	364	fPosition += fCount;
	365	fCount = 0;
	366	return kTRUE;
	367	}
	368
	369	Bool_t AliRawReaderDateV3::ReadNext(UChar_t* data, Int_t size)
	370	{
	371	// reads the next block of data at the current position
	372	// returns kFALSE if the data could not be read
	373
	374	fErrorCode = 0;
	375	if (fPosition + size > fEnd) {
	376	Error("ReadNext", "could not read data!");
	377	fErrorCode = kErrOutOfBounds;
	378	return kFALSE;
	379	}
	380	memcpy(data, fPosition, size);
	381	fPosition += size;
	382	fCount -= size;
	383	return kTRUE;
	384	}
	385
	386
	387	Bool_t AliRawReaderDateV3::Reset()
	388	{
	389	// reset the current position to the beginning of the event
	390
	391	fSubEvent = NULL;
	392	fCount = 0;
	393	fPosition = fEnd = NULL;
	394	return kTRUE;
	395	}
	396
	397
	398	Bool_t AliRawReaderDateV3::NextEvent()
	399	{
	400	// go to the next event in the date file
401
402	if (!fFile) return kFALSE;
403
404	Reset();
405	eventHeaderStruct header;
406	UInt_t headerSize = sizeof(eventHeaderStruct);
407	if (fEvent) delete[] fEvent;
408	fEvent = &header;
409
410	while (fread(&header, 1, headerSize, fFile) == headerSize) {
411	if (!IsEventSelected()) {
412	fseek(fFile, header.size-headerSize, SEEK_CUR);
413	continue;
414	}
415	UChar_t* buffer = new UChar_t[header.size];
b91d160c	416	fseek(fFile, -(long)headerSize, SEEK_CUR);
29a569c4	417	if (Int_t(fread(buffer, 1, header.size, fFile)) != header.size) {
	418	Error("NextEvent", "could not read event from file");
	419	delete[] buffer;
	420	break;
	421	}
	422	fEvent = (eventHeaderStruct*) buffer;
38cf12f3	423	fEventNumber++;
29a569c4	424	return kTRUE;
	425	};
	426
	427	fEvent = NULL;
	428	return kFALSE;
	429	}
	430
	431	Bool_t AliRawReaderDateV3::RewindEvents()
	432	{
	433	// go back to the beginning of the date file
	434
	435	if (!fFile) return kFALSE;
	436
	437	fseek(fFile, 0, SEEK_SET);
38cf12f3	438	fEventNumber = -1;
29a569c4	439	return Reset();
	440	}
	441
	442
	443	Int_t AliRawReaderDateV3::CheckData() const
	444	{
	445	// check the consistency of the data
	446
	447	if (!fEvent) return 0;
	448	// check whether there are sub events
	449	if (fEvent->size <= Int_t(fEvent->headLen)) return 0;
	450
	451	eventHeaderStruct* subEvent = NULL;
	452	UChar_t* position = 0;
	453	UChar_t* end = 0;
	454	Int_t result = 0;
	455
	456	while (kTRUE) {
	457	// check for end of event data
	458	if (position >= ((UChar_t*)fEvent)+fEvent->size) return result;
2512bc59	459	if ((fEvent->detectorId[2] & 0x8000) != 0x8000) {
29a569c4	460	subEvent = fEvent; // no super event
	461	} else if (subEvent) {
	462	subEvent = (eventHeaderStruct) (((UChar_t)subEvent) +
	463	subEvent->size);
	464	} else {
	465	subEvent = (eventHeaderStruct) (((UChar_t)fEvent) +
	466	fEvent->headLen);
	467	}
	468
	469	// check the magic word of the sub event
	470	if (subEvent->magic != EVENT_MAGIC_NUMBER) {
	471	result \|= kErrMagic;
	472	return result;
	473	}
	474
	475	position = ((UChar_t*)subEvent) + subEvent->headLen;
	476	end = ((UChar_t*)subEvent) + subEvent->size;
	477
	478	// continue with the next sub event if no data left in the payload
	479	if (position >= end) continue;
	480
	481	if (fRequireHeader) {
	482	// check that there are enough bytes left for the data header
	483	if (position + sizeof(AliRawDataHeader) > end) {
	484	result \|= kErrNoDataHeader;
	485	position = end;
	486	continue;
	487	}
	488
	489	// check consistency of data size in the data header and in the sub event
	490	AliRawDataHeader* header = (AliRawDataHeader*) position;
299738b9	491	if ((position + header->fSize) != end) {
806e573c	492	if (header->fSize != 0xFFFFFFFF)
806e573c	493	Warning("ReadHeader",
6c12d59f	494	"raw data size found in the header is wrong (%d != %ld)! Using the equipment size instead !",
806e573c	495	header->fSize, end - position);
299738b9	496	header->fSize = end - position;
299738b9	497	result \|= kErrSize;
29a569c4	498	}
	499	}
	500	position = end;
	501	};
	502
	503	return 0;
	504	}