[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, -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);
}


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;
}


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;
      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, -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;
    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);
  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 (header->fSize != 0xFFFFFFFF) {
	if (position + header->fSize > end) 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];
	89	fseek(fFile, -headerSize, SEEK_CUR);
	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
202
203	Int_t AliRawReaderDateV3::GetEquipmentSize() const
204	{
205	// get the size of the equipment
206
207	if (!fSubEvent) return 0;
208	return fSubEvent->size;
209	}
210
211	Int_t AliRawReaderDateV3::GetEquipmentType() const
212	{
213	// get the type from the equipment header
214
215	return 0;
216	}
217
218	Int_t AliRawReaderDateV3::GetEquipmentId() const
219	{
220	// get the ID from the equipment header
221
222	return 0;
223	}
224
225	const UInt_t* AliRawReaderDateV3::GetEquipmentAttributes() const
226	{
227	// get the attributes from the equipment header
228
229	return 0;
230	}
231
232	Int_t AliRawReaderDateV3::GetEquipmentElementSize() const
233	{
234	// get the basic element size from the equipment header
235
236	return 0;
237	}
238
239
240	Bool_t AliRawReaderDateV3::ReadHeader()
241	{
242	// read a data header at the current position
243	// returns kFALSE if the data header could not be read
244
245	fErrorCode = 0;
246
247	fHeader = NULL;
248	if (!fEvent) return kFALSE;
249	// check whether there are sub events
250	if (fEvent->size <= Int_t(fEvent->headLen)) return kFALSE;
251
252	do {
253	// skip payload (if event was not selected)
254	if (fCount > 0) fPosition += fCount;
255
256	// check for end of event data
257	if (fPosition >= ((UChar_t*)fEvent)+fEvent->size) return kFALSE;
2512bc59	258	if ((fEvent->detectorId[2] & 0x8000) != 0x8000) {
29a569c4	259	fSubEvent = fEvent; // no super event
	260	} else if (fSubEvent) {
	261	fSubEvent = (eventHeaderStruct) (((UChar_t)fSubEvent) +
	262	fSubEvent->size);
	263	} else {
	264	fSubEvent = (eventHeaderStruct) (((UChar_t)fEvent) +
	265	fEvent->headLen);
	266	}
	267
	268	// check the magic word of the sub event
	269	if (fSubEvent->magic != EVENT_MAGIC_NUMBER) {
	270	Error("ReadHeader", "wrong magic number in sub event!\n"
	271	" run: %d event: %d\n",
	272	fSubEvent->runNb, fSubEvent->nbInRun);
	273	fErrorCode = kErrMagic;
	274	return kFALSE;
	275	}
	276
	277	// continue if no data in the subevent
	278	if (fSubEvent->size == Int_t(fSubEvent->headLen)) {
	279	fPosition = fEnd = ((UChar_t*)fSubEvent) + fSubEvent->size;
	280	fCount = 0;
	281	continue;
	282	}
	283
	284	fCount = 0;
	285	fPosition = ((UChar_t*)fSubEvent) + sizeof(eventHeaderStruct);
	286	fEnd = ((UChar_t*)fSubEvent) + fSubEvent->size;
	287
	288	// continue with the next sub event if no data left in the payload
	289	if (fPosition >= fEnd) continue;
	290
	291	if (fRequireHeader) {
	292	// check that there are enough bytes left for the data header
	293	if (fPosition + sizeof(AliRawDataHeader) > fEnd) {
	294	Error("ReadHeader", "could not read data header data!");
	295	Warning("ReadHeader", "skipping %d bytes\n"
	296	" run: %d event: %d\n",
	297	fEnd - fPosition, fSubEvent->runNb, fSubEvent->nbInRun);
	298	fCount = 0;
	299	fPosition = fEnd;
	300	fErrorCode = kErrNoDataHeader;
	301	continue;
	302	}
	303
	304	// "read" the data header
	305	fHeader = (AliRawDataHeader*) fPosition;
	306	fPosition += sizeof(AliRawDataHeader);
	307	}
	308
	309	if (fHeader && (fHeader->fSize != 0xFFFFFFFF)) {
	310	fCount = fHeader->fSize - sizeof(AliRawDataHeader);
	311
	312	// check consistency of data size in the header and in the sub event
	313	if (fPosition + fCount > fEnd) {
	314	Error("ReadHeader", "size in data header exceeds event size!");
	315	Warning("ReadHeader", "skipping %d bytes\n"
	316	" run: %d event: %d\n",
	317	fEnd - fPosition, fSubEvent->runNb, fSubEvent->nbInRun);
	318	fCount = 0;
	319	fPosition = fEnd;
	320	fErrorCode = kErrSize;
	321	continue;
	322	}
323
324	} else {
325	fCount = fEnd - fPosition;
326	}
327
328	} while (!IsSelected());
329
330	return kTRUE;
331	}
332
333	Bool_t AliRawReaderDateV3::ReadNextData(UChar_t*& data)
334	{
335	// reads the next payload at the current position
336	// returns kFALSE if the data could not be read
337
338	fErrorCode = 0;
339	while (fCount == 0) {
340	if (!ReadHeader()) return kFALSE;
341	}
342	data = fPosition;
343	fPosition += fCount;
344	fCount = 0;
345	return kTRUE;
346	}
347
348	Bool_t AliRawReaderDateV3::ReadNext(UChar_t* data, Int_t size)
349	{
350	// reads the next block of data at the current position
351	// returns kFALSE if the data could not be read
352
353	fErrorCode = 0;
354	if (fPosition + size > fEnd) {
355	Error("ReadNext", "could not read data!");
356	fErrorCode = kErrOutOfBounds;
357	return kFALSE;
358	}
359	memcpy(data, fPosition, size);
360	fPosition += size;
361	fCount -= size;
362	return kTRUE;
363	}
364
365
366	Bool_t AliRawReaderDateV3::Reset()
367	{
368	// reset the current position to the beginning of the event
369
370	fSubEvent = NULL;
371	fCount = 0;
372	fPosition = fEnd = NULL;
373	return kTRUE;
374	}
375
376
377	Bool_t AliRawReaderDateV3::NextEvent()
378	{
379	// go to the next event in the date file
380
381	if (!fFile) return kFALSE;
382
383	Reset();
384	eventHeaderStruct header;
385	UInt_t headerSize = sizeof(eventHeaderStruct);
386	if (fEvent) delete[] fEvent;
387	fEvent = &header;
388
389	while (fread(&header, 1, headerSize, fFile) == headerSize) {
390	if (!IsEventSelected()) {
391	fseek(fFile, header.size-headerSize, SEEK_CUR);
392	continue;
393	}
394	UChar_t* buffer = new UChar_t[header.size];
395	fseek(fFile, -headerSize, SEEK_CUR);
396	if (Int_t(fread(buffer, 1, header.size, fFile)) != header.size) {
397	Error("NextEvent", "could not read event from file");
398	delete[] buffer;
399	break;
400	}
401	fEvent = (eventHeaderStruct*) buffer;
402	return kTRUE;
403	};
404
405	fEvent = NULL;
406	return kFALSE;
407	}
408
409	Bool_t AliRawReaderDateV3::RewindEvents()
410	{
411	// go back to the beginning of the date file
412
413	if (!fFile) return kFALSE;
414
415	fseek(fFile, 0, SEEK_SET);
416	return Reset();
417	}
418
419
420	Int_t AliRawReaderDateV3::CheckData() const
421	{
422	// check the consistency of the data
423
424	if (!fEvent) return 0;
425	// check whether there are sub events
426	if (fEvent->size <= Int_t(fEvent->headLen)) return 0;
427
428	eventHeaderStruct* subEvent = NULL;
429	UChar_t* position = 0;
430	UChar_t* end = 0;
431	Int_t result = 0;
432
433	while (kTRUE) {
434	// check for end of event data
435	if (position >= ((UChar_t*)fEvent)+fEvent->size) return result;
2512bc59	436	if ((fEvent->detectorId[2] & 0x8000) != 0x8000) {
29a569c4	437	subEvent = fEvent; // no super event
	438	} else if (subEvent) {
	439	subEvent = (eventHeaderStruct) (((UChar_t)subEvent) +
	440	subEvent->size);
	441	} else {
	442	subEvent = (eventHeaderStruct) (((UChar_t)fEvent) +
	443	fEvent->headLen);
	444	}
	445
	446	// check the magic word of the sub event
	447	if (subEvent->magic != EVENT_MAGIC_NUMBER) {
	448	result \|= kErrMagic;
	449	return result;
	450	}
	451
	452	position = ((UChar_t*)subEvent) + subEvent->headLen;
	453	end = ((UChar_t*)subEvent) + subEvent->size;
	454
	455	// continue with the next sub event if no data left in the payload
	456	if (position >= end) continue;
	457
	458	if (fRequireHeader) {
	459	// check that there are enough bytes left for the data header
	460	if (position + sizeof(AliRawDataHeader) > end) {
	461	result \|= kErrNoDataHeader;
	462	position = end;
	463	continue;
	464	}
	465
	466	// check consistency of data size in the data header and in the sub event
	467	AliRawDataHeader* header = (AliRawDataHeader*) position;
	468	if (header->fSize != 0xFFFFFFFF) {
	469	if (position + header->fSize > end) result \|= kErrSize;
	470	}
	471	}
	472	position = end;
	473	};
	474
	475	return 0;
	476	}