FileReaderDCC Class Reference

#include <FileReaderDCC.h>

Public Types
enum	{   Header = 1, Trailer = 2, DCCoversize = 4, FFFF = 8,   Unknown = 16, EndOfStream = 32 }
enum	{   Type1 = Header | Trailer, Type2 = Header, Type3 = Header | DCCoversize, Type4 = Trailer,   Type5 = Unknown, Type6 = Unknown | DCCoversize, Type7 = FFFF }

Public Member Functions
void	accept (unsigned int criteria) throw ()
	FileReaderDCC (void)
size_t	next (const unsigned short *&buf)
int	open (const char *filename)
size_t	read (const unsigned short *&buf)
void	reject (unsigned int criteria) throw ()
void	select (unsigned int criteria) throw ()
unsigned int	status (void) const throw ()
virtual	~FileReaderDCC (void)

Private Attributes
unsigned int	acceptCriteria
unsigned long long *	end
unsigned int	eventStatus
int	fd
unsigned long long	file_buffer [4000]
unsigned long long *	file_buffer_end
unsigned short *	raw_event
unsigned int	rejectCriteria
unsigned int	selectCriteria
unsigned long long	word_0
unsigned long long	word_1
unsigned long long	word_2

Detailed Description

Definition at line 7 of file FileReaderDCC.h.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
Header
Trailer
DCCoversize
FFFF
Unknown
EndOfStream

Definition at line 17 of file FileReaderDCC.h.

{ Header = 1, Trailer = 2, DCCoversize = 4, FFFF = 8, Unknown = 16, EndOfStream = 32 };

anonymous enum

anonymous enum

Enumerator
Type1
Type2
Type3
Type4
Type5
Type6
Type7

Definition at line 18 of file FileReaderDCC.h.

       {
    Type1 = Header | Trailer,
    Type2 = Header,
    Type3 = Header | DCCoversize,
    Type4 = Trailer,
    Type5 = Unknown,
    Type6 = Unknown | DCCoversize,
    Type7 = FFFF
  };  // Andrey Korytov's notations

Constructor & Destructor Documentation

FileReaderDCC()

FileReaderDCC::FileReaderDCC

(

void

)

Definition at line 15 of file FileReaderDCC.cc.

References acceptCriteria, DCCoversize, end, eventStatus, fd, FFFF, file_buffer, file_buffer_end, Header, raw_event, rejectCriteria, selectCriteria, AlCaHLTBitMon_QueryRunRegistry::string, Trailer, Unknown, word_0, word_1, and word_2.

                                 {
  if (sizeof(unsigned long long) != 8 || sizeof(unsigned short) != 2)
    throw std::runtime_error(std::string("Wrong platform: sizeof(unsigned long long)!=8 || sizeof(unsigned short)!=2"));
  raw_event = new unsigned short[200000 * 40];
  end = (file_buffer_end = file_buffer + sizeof(file_buffer) / sizeof(unsigned long long));
  bzero(raw_event, sizeof(unsigned short) * 200000 * 40);
  bzero(file_buffer, sizeof(file_buffer));
  word_0 = 0;
  word_1 = 0;
  word_2 = 0;
  eventStatus = 0;
  selectCriteria = Header | Trailer;
  rejectCriteria = DCCoversize | FFFF | Unknown;
  acceptCriteria = 0x3F;  // Everything
  fd = 0;
}

~FileReaderDCC()

FileReaderDCC::~FileReaderDCC ( void  )

virtual

Definition at line 32 of file FileReaderDCC.cc.

References fd.

                                  {
  if (fd)
    close(fd);
}

Member Function Documentation

accept()

void FileReaderDCC::accept ( unsigned int  criteria ) throw ( )

inline

Definition at line 37 of file FileReaderDCC.h.

References acceptCriteria.

Referenced by esMonitoring.FDJsonServer::handle_accept().

                                             {
    acceptCriteria = criteria;
  }  // return all events satisfying any of criteria

next()

size_t FileReaderDCC::next

(

const unsigned short *&

buf

)

Definition at line 146 of file FileReaderDCC.cc.

References acceptCriteria, visDQMUpload::buf, eventStatus, read(), rejectCriteria, selectCriteria, and findQualityFiles::size.

Referenced by CSCFileReader::readFU().

                                                     {
  size_t size = 0;
  do {
    if ((size = read(buf)) == 0)
      break;
  } while (rejectCriteria & eventStatus || !(acceptCriteria & eventStatus) ||
           (selectCriteria ? selectCriteria != eventStatus : 0));
  return size;
}

open()

int FileReaderDCC::open

(

const char *

filename

)

Definition at line 37 of file FileReaderDCC.cc.

References mps_setup::append, fd, corrVsCorr::filename, O_LARGEFILE, and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by CSCFileReader::CSCFileReader(), and CSCFileReader::readFU().

                                            {
  if (fd)
    close(fd);
  fd = ::open(filename, O_RDONLY | O_LARGEFILE);
  if (fd == -1)
    throw(std::runtime_error(std::string("Error opening ").append(filename).append(" data file.")));
  return fd;
}

read()

size_t FileReaderDCC::read

(

const unsigned short *&

buf

)

Definition at line 46 of file FileReaderDCC.cc.

References visDQMUpload::buf, DCCoversize, end, EndOfStream, eventStatus, fd, FFFF, file_buffer, file_buffer_end, Header, raw_event, isotrackNtupler::start, Trailer, Unknown, word_0, word_1, and word_2.

Referenced by edmIntegrityCheck.PublishToFileSystem::get(), and next().

                                                     {
  // Check for ubnormal situation
  if (end > file_buffer_end || end < file_buffer)
    throw(std::runtime_error("Error of reading"));
  if (!fd)
    throw(std::runtime_error("Open some file first"));

  unsigned long long *start = end;
  unsigned short *event = raw_event;

  eventStatus = 0;
  size_t dccWordCount = 0;
  end = nullptr;

  while (!end && dccWordCount < 50000 * 40) {
    unsigned long long *dccWord = start;
    unsigned long long preHeader = 0;

    // Did we reach end of current buffer and want to read next block?
    // If it was first time and we don't have file buffer then we won't get inside
    while (dccWord < file_buffer_end && dccWordCount < 50000) {
      word_0 = word_1;                                                // delay by 2 DCC words
      word_1 = word_2;                                                // delay by 1 DCC word
      word_2 = *dccWord;                                              // current DCC word
      if ((word_1 & 0xF0000000000000FFLL) == 0x500000000000005FLL &&  // let's call this a preHeader
          (word_2 & 0xFF000000000000FFLL) == 0xD900000000000017LL)    // and this is a header
      {
        if (eventStatus & Header)  // Second header
        {
          word_2 = word_1;  // Fall back to get rigth preHeader next time
          end = dccWord;    // Even if we end with preHeader of next evet put it to the end of this event too
          break;
        }
        if (dccWordCount > 1)  // Extra words between trailer and header
        {
          if ((word_0 & 0xFFFFFFFFFFFF0000LL) == 0xFFFFFFFFFFFF0000LL)
            eventStatus |= FFFF;
          word_2 = word_1;  // Fall back to get rigth preHeader next time
          end = dccWord;
          break;
        }
        eventStatus |= Header;
        if (event == raw_event)
          preHeader = word_1;  // If preHeader not yet in event then put it there
        start = dccWord;
      }
      if ((word_1 & 0xFF00000000000000LL) == 0xEF00000000000000LL &&
          (word_2 & 0xFF0000000000000FLL) == 0xAF00000000000007LL) {
        eventStatus |= Trailer;
        end = ++dccWord;
        break;
      }
      // Increase counters by one DCC word
      dccWord++;
      dccWordCount++;
    }

    // If have DCC Header
    if (preHeader) {
      // Need to account first word of DCC Header
      memcpy(event, &preHeader, sizeof(preHeader));
      event += sizeof(preHeader) / sizeof(unsigned short);
    }

    // Take care of the rest
    memcpy(event, start, (dccWord - start) * sizeof(unsigned long long));
    event += (dccWord - start) * sizeof(unsigned long long) / sizeof(unsigned short);

    // If reach max length
    if (dccWordCount == 50000 * 40) {
      end = dccWord;
      break;
    }

    if (!end) {
      // Need to read next block for the rest of this event
      ssize_t length = ::read(fd, file_buffer, sizeof(file_buffer));
      if (length == -1)
        throw(std::runtime_error("Error of reading"));
      if (length == 0) {
        eventStatus |= EndOfStream;
        end = (file_buffer_end = file_buffer + sizeof(file_buffer) / sizeof(unsigned long long));
        break;
      }
      file_buffer_end = file_buffer + length / sizeof(unsigned long long);

      // Will start from the beginning of new buffer next time we read it
      start = file_buffer;
    }
  }

  if (!end)
    eventStatus |= DCCoversize;
  if (!(eventStatus & Header) && !(eventStatus & Trailer) && !(eventStatus & FFFF))
    eventStatus |= Unknown;

  buf = (const unsigned short *)raw_event;
  return (eventStatus & FFFF ? event - raw_event - 4 : event - raw_event);
}

reject()

void FileReaderDCC::reject ( unsigned int  criteria ) throw ( )

inline

Definition at line 40 of file FileReaderDCC.h.

References rejectCriteria.

Referenced by CSCFileReader::CSCFileReader().

                                             {
    rejectCriteria = criteria;
  }  // return events not satisfying any of criteria

select()

void FileReaderDCC::select ( unsigned int  criteria ) throw ( )

inline

Definition at line 36 of file FileReaderDCC.h.

References selectCriteria.

Referenced by CSCFileReader::CSCFileReader().

{ selectCriteria = criteria; }  // return events satisfying all criteria

status()

unsigned int FileReaderDCC::status ( void  ) const throw ( )

inline

Definition at line 44 of file FileReaderDCC.h.

References eventStatus.

{ return eventStatus; }

Member Data Documentation

acceptCriteria

unsigned int FileReaderDCC::acceptCriteria

private

Definition at line 28 of file FileReaderDCC.h.

Referenced by accept(), FileReaderDCC(), and next().

end

unsigned long long* FileReaderDCC::end

private

Definition at line 14 of file FileReaderDCC.h.

Referenced by Types.LuminosityBlockRange::cppID(), Types.EventRange::cppID(), FileReaderDCC(), and read().

eventStatus

unsigned int FileReaderDCC::eventStatus

private

Definition at line 28 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), next(), read(), and status().

fd

int FileReaderDCC::fd

private

Definition at line 30 of file FileReaderDCC.h.

Referenced by progressbar.ProgressBar::_handle_resize(), FileReaderDCC(), progressbar.ProgressBar::finish(), open(), read(), and ~FileReaderDCC().

file_buffer

unsigned long long FileReaderDCC::file_buffer[4000]

private

Definition at line 12 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), and read().

file_buffer_end

unsigned long long * FileReaderDCC::file_buffer_end

private

Definition at line 14 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), and read().

raw_event

unsigned short* FileReaderDCC::raw_event

private

Definition at line 9 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), and read().

rejectCriteria

unsigned int FileReaderDCC::rejectCriteria

private

Definition at line 28 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), next(), and reject().

selectCriteria

unsigned int FileReaderDCC::selectCriteria

private

Definition at line 28 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), next(), and select().

word_0

unsigned long long FileReaderDCC::word_0

private

Definition at line 11 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), and read().

word_1

unsigned long long FileReaderDCC::word_1

private

Definition at line 11 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), and read().

word_2

unsigned long long FileReaderDCC::word_2

private

Definition at line 11 of file FileReaderDCC.h.

Referenced by FileReaderDCC(), and read().