edm::TRandomAdaptor Class Reference

#include <TRandomAdaptor.h>

Inheritance diagram for edm::TRandomAdaptor:

Public Types
typedef value_ptr< TRandom3 >	TRandom3Ptr

Public Member Functions
std::string	beginTag ()
double	flat ()
void	flatArray (int const size, double *vect)
virtual std::istream &	get (std::istream &is)
bool	get (std::vector< unsigned long > const &v)
TRandom3 *	getRootEngine ()
virtual std::istream &	getState (std::istream &is)
bool	getState (std::vector< unsigned long > const &v)
std::string	name () const
	operator float ()
	operator unsigned int ()
virtual std::ostream &	put (std::ostream &os) const
std::vector< unsigned long >	put () const
void	restoreStatus (char const filename[]="TRandom.conf")
void	saveStatus (char const filename[]="TRandom.conf") const
void	setSeed (long seed, int)
void	setSeeds (long const *seeds, int)
void	showStatus () const
	TRandomAdaptor ()
	TRandomAdaptor (long seed)
	TRandomAdaptor (int rowIndex, int colIndex)
	TRandomAdaptor (std::istream &is)
virtual	~TRandomAdaptor ()

Static Public Member Functions
static std::string	engineName ()

Private Member Functions
void	Grumble (std::string const &errortext) const

Private Attributes
TRandom3Ptr	trand_

Detailed Description

Definition at line 13 of file TRandomAdaptor.h.

Member Typedef Documentation

typedef value_ptr<TRandom3> edm::TRandomAdaptor::TRandom3Ptr

Definition at line 16 of file TRandomAdaptor.h.

Constructor & Destructor Documentation

edm::TRandomAdaptor::TRandomAdaptor ( )

inline

Definition at line 19 of file TRandomAdaptor.h.

: trand_(new TRandom3()) {}

edm::TRandomAdaptor::TRandomAdaptor ( long  seed )

inline

Definition at line 20 of file TRandomAdaptor.h.

: trand_(new TRandom3(seed)) {}

edm::TRandomAdaptor::TRandomAdaptor ( int  rowIndex, int  colIndex  )

inline

Definition at line 21 of file TRandomAdaptor.h.

: trand_(new TRandom3(rowIndex*colIndex-1)) {}

edm::TRandomAdaptor::TRandomAdaptor

(

std::istream &

is

)

Definition at line 17 of file TRandomAdaptor.cc.

References Grumble().

                                          {
  Grumble(std::string("Cannot instantiate a TRandom engine from an istream"));
}

edm::TRandomAdaptor::~TRandomAdaptor ( )

virtual

Definition at line 21 of file TRandomAdaptor.cc.

                                {
}

Member Function Documentation

std::string edm::TRandomAdaptor::beginTag ( )

inline

Definition at line 55 of file TRandomAdaptor.h.

References trand_.

{ return std::string(trand_->GetName())+std::string("-begin"); }

static std::string edm::TRandomAdaptor::engineName ( )

inlinestatic

Definition at line 60 of file TRandomAdaptor.h.

{ return std::string("TRandomAdaptor"); }

double edm::TRandomAdaptor::flat ( void  )

inline

Definition at line 26 of file TRandomAdaptor.h.

References trand_.

{ return trand_->Rndm(); }

void edm::TRandomAdaptor::flatArray ( int const  size, double *  vect  )

inline

Definition at line 29 of file TRandomAdaptor.h.

References trand_.

{ trand_->RndmArray(size,vect); }

std::istream & edm::TRandomAdaptor::get ( std::istream &  is )

virtual

Definition at line 65 of file TRandomAdaptor.cc.

References getState(), and Grumble().

Referenced by Options.Options::__getitem__(), betterConfigParser.BetterConfigParser::__updateDict(), betterConfigParser.BetterConfigParser::getCompares(), betterConfigParser.BetterConfigParser::getGeneral(), and betterConfigParser.BetterConfigParser::getResultingSection().

                                              {
  Grumble(std::string("get(std::istream) not available for TRandom engines"));
  return getState(is);
}

bool edm::TRandomAdaptor::get

(

std::vector< unsigned long > const &

v

)

Definition at line 75 of file TRandomAdaptor.cc.

References i, and trand_.

Referenced by Options.Options::__getitem__(), betterConfigParser.BetterConfigParser::__updateDict(), betterConfigParser.BetterConfigParser::getCompares(), betterConfigParser.BetterConfigParser::getGeneral(), and betterConfigParser.BetterConfigParser::getResultingSection().

                                                          {
  if(v.empty())  return false;
  if(v[0] != CLHEP::engineIDulong<TRandomAdaptor>()) return false;
  int32_t numItems = v.size()-1;

  int32_t itemSize = sizeof(uint32_t);
  TBufferFile buffer(TBuffer::kRead, numItems * itemSize + 1024);
  char* bufferPtr = buffer.Buffer();
  for(int32_t i = 0; i < numItems; ++i) {

    *reinterpret_cast<uint32_t*>(bufferPtr + i * itemSize) = static_cast<uint32_t>(v[i+1] & 0xffffffff);
  }

  // Note that this will fail if the TRandom3 version (specifically the TStreamerInfo)
  // has changed between the time the state was saved and the time the following call
  // is made.  Because we are manually calling the Streamer function, the original
  // TStreamerInfo is not saved anywhere. Normally ROOT saves the TStreamerInfo
  // automatically.
  trand_->Streamer(buffer);

  return true;
}

TRandom3* edm::TRandomAdaptor::getRootEngine ( )

inline

Definition at line 67 of file TRandomAdaptor.h.

References trand_.

{ return trand_.operator->(); }

std::istream & edm::TRandomAdaptor::getState ( std::istream &  is )

virtual

Definition at line 70 of file TRandomAdaptor.cc.

References Grumble().

Referenced by get().

                                                   {
  Grumble(std::string("getState(std::istream) not available for TRandom engines"));
  return is;
}

bool edm::TRandomAdaptor::getState ( std::vector< unsigned long > const &  v )

inline

Definition at line 64 of file TRandomAdaptor.h.

References v.

{ return get(v); }

void edm::TRandomAdaptor::Grumble ( std::string const &  errortext ) const

private

Definition at line 98 of file TRandomAdaptor.cc.

References edm::errors::UnimplementedFeature.

Referenced by get(), getState(), put(), and TRandomAdaptor().

                                                             {

// Throw an edm::Exception for unimplemented functions
   std::ostringstream sstr;
   sstr << "Unimplemented Feature: " << errortext << '\n';
   edm::Exception except(edm::errors::UnimplementedFeature, sstr.str());
   throw except;
}

std::string edm::TRandomAdaptor::name ( void  ) const

inline

Definition at line 59 of file TRandomAdaptor.h.

References trand_.

Referenced by BeautifulSoup.Tag::_invert().

{ return std::string("T")+std::string(trand_->GetName()); }

edm::TRandomAdaptor::operator float ( )

inline

Definition at line 48 of file TRandomAdaptor.h.

References trand_.

{ return (float)(trand_->Rndm()); }

edm::TRandomAdaptor::operator unsigned int ( )

inline

Definition at line 51 of file TRandomAdaptor.h.

References trand_.

{ return (unsigned int)((trand_->Rndm())*exponent_bit_32); }

std::ostream & edm::TRandomAdaptor::put ( std::ostream &  os ) const

virtual

Definition at line 24 of file TRandomAdaptor.cc.

References Grumble().

                                                    {
  Grumble(std::string("put(std::ostream) not available for TRandom engines"));
  return os;
}

std::vector< unsigned long > edm::TRandomAdaptor::put

(

)

const

Definition at line 29 of file TRandomAdaptor.cc.

References i, trand_, and v.

                                                   {
  std::vector<unsigned long> v;

  int32_t itemSize = sizeof(uint32_t);
  TBufferFile buffer(TBuffer::kWrite, 2048 * itemSize);
  trand_->Streamer(buffer);
  buffer.SetReadMode();
  char* bufferPtr = buffer.Buffer();
  int32_t numItems = (buffer.Length() + itemSize - 1) / itemSize;
  v.reserve(numItems + 1);
  v.push_back(CLHEP::engineIDulong<TRandomAdaptor>());
  for(int i = 0; i < numItems; ++i) {

    // Here we do some ugly manipulations to the data to match the format
    // of the output of the CLHEP put function (the whole point of this adaptor
    // is to make TRandom3 work through the CLHEP interface as if it were a
    // a CLHEP engine ...).  In CLHEP, the vector returned by put contains
    // unsigned long's, but these always contain only 32 bits of information.
    // In the case of a 64 bit build the top 32 bits is only padding (all 0's).

    // Get the next 32 bits of data from the buffer
    uint32_t value32 = *reinterpret_cast<uint32_t*>(bufferPtr + i * itemSize);

    if(i == numItems - 1) {
      int nBytes = buffer.Length() % itemSize;
      if(nBytes == 1) value32 &= 0xffu;
      else if(nBytes == 2) value32 &= 0xffffu;
      else if(nBytes == 3) value32 &= 0xffffffu;
    }

    // Push it into the vector in an unsigned long which may be 32 or 64 bits
    v.push_back(static_cast<unsigned long>(value32));
  }
  return v;
}

void edm::TRandomAdaptor::restoreStatus ( char const  filename[] = "TRandom.conf" )

inline

Definition at line 42 of file TRandomAdaptor.h.

References lut2db_cfg::filename, and trand_.

{ trand_->ReadRandom(filename); }

void edm::TRandomAdaptor::saveStatus ( char const  filename[] = "TRandom.conf" ) const

inline

Definition at line 39 of file TRandomAdaptor.h.

References lut2db_cfg::filename, and trand_.

{ trand_->WriteRandom(filename); }

void edm::TRandomAdaptor::setSeed ( long  seed, int    )

inline

Definition at line 32 of file TRandomAdaptor.h.

References trand_.

{ trand_->SetSeed(seed); }

void edm::TRandomAdaptor::setSeeds ( long const *  seeds, int    )

inline

Definition at line 36 of file TRandomAdaptor.h.

References trand_.

{ trand_->SetSeed(seeds[0]); }

void edm::TRandomAdaptor::showStatus ( ) const

inline

Definition at line 45 of file TRandomAdaptor.h.

References trand_.

{ trand_->Dump(); }

Member Data Documentation

TRandom3Ptr edm::TRandomAdaptor::trand_

private

Definition at line 73 of file TRandomAdaptor.h.

Referenced by beginTag(), flat(), flatArray(), get(), getRootEngine(), name(), operator float(), operator unsigned int(), put(), restoreStatus(), saveStatus(), setSeed(), setSeeds(), and showStatus().