l1t::LUT Class Reference

#include <LUT.h>

Public Types
enum	ReadCodes {   SUCCESS =0, NO_ENTRIES =1, DUP_ENTRIES =2, MISS_ENTRIES =3,   MAX_ADDRESS_OUTOFRANGE =4, NO_HEADER =5 }

Public Member Functions
int	data (unsigned int address) const
bool	empty () const
	LUT ()
	LUT (std::istream &stream)
unsigned int	maxSize () const
unsigned int	nrBitsAddress () const
unsigned int	nrBitsData () const
int	read (std::istream &stream)
void	write (std::ostream &stream) const
	~LUT ()

Private Member Functions
int	readHeader_ (std::istream &)

Private Attributes
unsigned int	addressMask_
std::vector< int >	data_
unsigned int	dataMask_
unsigned int	nrBitsAddress_
unsigned int	nrBitsData_

Detailed Description

Description: A class implimentating a look up table

Implementation: Internally stores data in vector filled with 32 bit ints address and output is masked to specifed number of bits vector only allocates as necessary, eg we may have a 32 bit address but we obviously dont want to allocate a 4gb vector

Error handling: currently waiting guidance on how to deal with this Exceptions are currently forbiden, emulator fails should not impact on the rest of the software chain. As such, everything silently fails gracefully

Author

: Sam Harper - RAL, Jim Brooke - Bristol

Definition at line 27 of file LUT.h.

Member Enumeration Documentation

enum l1t::LUT::ReadCodes

Enumerator
SUCCESS
NO_ENTRIES
DUP_ENTRIES
MISS_ENTRIES
MAX_ADDRESS_OUTOFRANGE
NO_HEADER

Definition at line 29 of file LUT.h.

                   {
      SUCCESS=0,NO_ENTRIES=1,DUP_ENTRIES=2,MISS_ENTRIES=3,MAX_ADDRESS_OUTOFRANGE=4,NO_HEADER=5
    };

Constructor & Destructor Documentation

l1t::LUT::LUT ( )

inline

Definition at line 33 of file LUT.h.

:data_(){}

l1t::LUT::LUT ( std::istream &  stream )

inlineexplicit

Definition at line 35 of file LUT.h.

References read().

                                     :
      data_()
    {
      read(stream);
    }

l1t::LUT::~LUT ( )

inline

Definition at line 42 of file LUT.h.

{}

Member Function Documentation

int l1t::LUT::data ( unsigned int  address ) const

inline

Definition at line 44 of file LUT.h.

References addressMask_, data_, and dataMask_.

Referenced by cuy.FindIssue::__init__().

{return (address&addressMask_)<data_.size() ? dataMask_ & data_[addressMask_&address] : 0;}

bool l1t::LUT::empty ( ) const

inline

Definition at line 52 of file LUT.h.

References data_.

Referenced by Vispa.Gui.VispaWidget.TextField::setAutosizeFont(), and Vispa.Gui.VispaWidget.TextField::setAutotruncate().

{return data_.empty();}

unsigned int l1t::LUT::maxSize ( ) const

inline

Definition at line 51 of file LUT.h.

References addressMask_, and max().

{return addressMask_==std::numeric_limits<unsigned int>::max() ? addressMask_ : addressMask_+1;}

unsigned int l1t::LUT::nrBitsAddress ( ) const

inline

Definition at line 48 of file LUT.h.

References nrBitsAddress_.

{return nrBitsAddress_;}

unsigned int l1t::LUT::nrBitsData ( ) const

inline

Definition at line 49 of file LUT.h.

References nrBitsData_.

{return nrBitsData_;}

int l1t::LUT::read

(

std::istream &

stream

)

Definition at line 35 of file LUT.cc.

References addressMask_, data_, dataMask_, DUP_ENTRIES, python.tagInventory::entries, spr::find(), geometryCSVtoXML::line, max(), MAX_ADDRESS_OUTOFRANGE, MISS_ENTRIES, NO_ENTRIES, readHeader_(), python.multivaluedict::sort(), AlCaHLTBitMon_QueryRunRegistry::string, SUCCESS, and create_public_lumi_plots::transform.

Referenced by Vispa.Plugins.EdmBrowser.EdmDataAccessor.EdmDataAccessor::goto(), LUT(), and Vispa.Plugins.EdmBrowser.EdmDataAccessor.EdmDataAccessor::setFilterBranches().

{ 
  data_.clear();

  int readHeaderCode = readHeader_(stream);
  if(readHeaderCode!=SUCCESS) return readHeaderCode;

  std::vector<std::pair<unsigned int,int> > entries;
  unsigned int maxAddress=addressMask_;
  std::string line;

  while(std::getline(stream,line)){
    line.erase( std::find( line.begin(), line.end(), '#' ), line.end() ); //ignore comments
    std::istringstream lineStream(line);
    std::pair<unsigned int,int> entry;
    while(lineStream >> entry.first >> entry.second ){
      entry.first&=addressMask_;
      entry.second&=dataMask_;
      entries.push_back(entry);      
      if(entry.first>maxAddress || maxAddress==addressMask_) maxAddress=entry.first;
    }
  }
  std::sort(entries.begin(),entries.end(),PairSortBy1st<unsigned int,int>());
  if(entries.empty()){
    //log the error we read nothing
    return NO_ENTRIES;
  }  
  //this check is redundant as dups are also picked up by the next check but might make for easier debugging
  if(std::adjacent_find(entries.begin(),entries.end(),PairSortBy1st<unsigned int,int,std::equal_to<unsigned int> >())!=entries.end()){
    //log the error that we have duplicate addresses once masked
    return DUP_ENTRIES;
  }
  if(entries.front().first!=0 ||
     std::adjacent_find(entries.begin(),entries.end(),
            PairSortBy1st<unsigned int,int,std::binary_negate<Adjacent<unsigned int> > >(std::binary_negate<Adjacent<unsigned int> >(Adjacent<unsigned int>())))!=entries.end()){ //not a great way, must be a better one...
    //log the error that we have a missing entry 
    return MISS_ENTRIES;
  }
     

  if(maxAddress!=std::numeric_limits<unsigned int>::max()) data_.resize(maxAddress+1,0);
  else{
    //log the error that we have more addresses than we can deal with (which is 4gb so something probably has gone wrong anyways)
    return MAX_ADDRESS_OUTOFRANGE;
  }

  std::transform(entries.begin(),entries.end(),data_.begin(),Pair2nd<unsigned int,int>());
  return SUCCESS;
  
}

int l1t::LUT::readHeader_ ( std::istream &  stream )

private

Definition at line 94 of file LUT.cc.

References geometryCSVtoXML::line, AlCaHLTBitMon_QueryRunRegistry::string, definitions::SUCCESS, and BeamSplash_cfg::version.

Referenced by read().

{
  
  int startPos=stream.tellg(); //we are going to reset to this position before we exit
  std::string line;
  while(std::getline(stream,line)){
    if(line.find("#<header>")==0){ //line 
      std::istringstream lineStream(line);
      
      std::string version; //currently not doing anything with this
      std::string headerField; //currently not doing anything with this
      if(lineStream >> headerField  >> version >> nrBitsAddress_ >> nrBitsData_){
    addressMask_ = nrBitsAddress_!=32 ? (0x1<<nrBitsAddress_)-1 : ~0x0;
    dataMask_ = (0x1<<nrBitsData_)-1;
    stream.seekg(startPos);
    return SUCCESS;
      }
    }
  }

  nrBitsAddress_ =0;
  nrBitsData_ = 0;
  addressMask_ = (0x1<<nrBitsAddress_)-1;
  dataMask_ = (0x1<<nrBitsData_)-1;
  
  stream.seekg(startPos);
  return NO_HEADER;
}

void l1t::LUT::write

(

std::ostream &

stream

)

const

Definition at line 86 of file LUT.cc.

References data.

Referenced by pkg.AbstractPkg::generate().

{
  stream <<"#<header> V1 "<<nrBitsAddress_<<" "<<nrBitsData_<<" </header> "<<std::endl;
  for(unsigned int address=0;address<data_.size();address++){
    stream << (address&addressMask_)<<" "<<data(address)<<std::endl;
  }
}

Member Data Documentation

unsigned int l1t::LUT::addressMask_

private

Definition at line 60 of file LUT.h.

Referenced by data(), maxSize(), and read().

std::vector<int> l1t::LUT::data_

private

Definition at line 63 of file LUT.h.

Referenced by data(), empty(), and read().

unsigned int l1t::LUT::dataMask_

private

Definition at line 61 of file LUT.h.

Referenced by data(), and read().

unsigned int l1t::LUT::nrBitsAddress_

private

Definition at line 58 of file LUT.h.

Referenced by nrBitsAddress().

unsigned int l1t::LUT::nrBitsData_

private

Definition at line 59 of file LUT.h.

Referenced by nrBitsData().