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