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