JROOT::JRandom Struct Reference

Auxiliary data structure to configure random number generator. More...

#include <JRandom.hh>

Inheritance diagram for JROOT::JRandom:

Public Member Functions
	JRandom ()
	Default constructor.
	JRandom (const TString &buffer)
	Constructor.
	JRandom (const ULong_t seed)
	Constructor.
bool	set (TRandom *&pr) const
	Configure random number generator.

Static Public Member Functions
static bool	read (const TString &file_name, TRandom *&pr)
	Read random number generator from file.
static bool	write (const TString &file_name, TRandom *pr)
	Write random number generator to file.

Friends
std::istream &	operator>> (std::istream &in, JRandom &object)
	Read random from input.
std::ostream &	operator<< (std::ostream &out, const JRandom &object)
	Write random to output.

Detailed Description

Auxiliary data structure to configure random number generator.

The internal TString can hold any of the following data.

• decimal value corresponding to seed;
• name of ROOT formatted binary file; or
• name of JSON formatted ASCII file.

Definition at line 34 of file JROOT/JRandom.hh.

Constructor & Destructor Documentation

JRandom() [1/3]

JROOT::JRandom::JRandom ( )

inline

Default constructor.

Definition at line 40 of file JROOT/JRandom.hh.

    {}

JRandom() [2/3]

JROOT::JRandom::JRandom ( const TString & buffer )

inline

Constructor.

Parameters

buffer

buffer

Definition at line 49 of file JROOT/JRandom.hh.

    {
      static_cast<TString&>(*this)  = buffer;
    }

JRandom() [3/3]

JROOT::JRandom::JRandom ( const ULong_t seed )

inline

Constructor.

Parameters

seed

seed

Definition at line 60 of file JROOT/JRandom.hh.

    {
      static_cast<TString&>(*this) += seed;
    }

Member Function Documentation

set()

bool JROOT::JRandom::set ( TRandom *& pr ) const

inline

Configure random number generator.

Parameters

pr	reference pointer to random number generator

Returns

true if successful; else false

Definition at line 98 of file JROOT/JRandom.hh.

    {
      using namespace std;
      using namespace JPP;
 
      if (pr != NULL) {
 
        if (this->IsDec()) {
 
          pr->SetSeed(this->Atoll());
 
          return true;
 
        } else {
 
          return JRandom::read(static_cast<const TString&>(*this), pr);
        }
      }
 
      return false;
    }

read()

static bool JROOT::JRandom::read ( const TString & file_name, TRandom *& pr )

inlinestatic

Read random number generator from file.

Parameters

file_name	file name
pr	reference pointer to random number generator

Returns

true if successful; else false

Definition at line 128 of file JROOT/JRandom.hh.

    {
      using namespace std;
      using namespace JPP;
 
      if (pr != NULL) {
 
        if        (file_name.EndsWith(".root")) {
 
          JRootFileReader<TRandom> in(file_name.Data(), pr->GetName());
 
          if (in.hasNext()) {
 
            TRandom* p = in.next();
 
            pr = (TRandom*) p->Clone();
 
            return true;
          }
          
        } else if (file_name.EndsWith(".txt")) {
 
          fstream in(file_name.Data());
 
          stringstream io;
 
          if (io << in.rdbuf()) {
 
            pr = (TRandom*) TBufferJSON::ConvertFromJSON(io.str().c_str());
 
            return true;
          }
        }
      }
 
      return false;
    }

write()

static bool JROOT::JRandom::write ( const TString & file_name, TRandom * pr )

inlinestatic

Write random number generator to file.

Parameters

file_name	file name
pr	pointer to random number generator

Returns

true if successful; else false

Definition at line 174 of file JROOT/JRandom.hh.

    {
      using namespace std;
      using namespace JPP;
 
      if (pr != NULL) {
 
        if        (file_name.EndsWith(".root")) {
 
          JRootFileWriter<TRandom> out(file_name.Data());
 
          out.put(*gRandom);
 
          out.close();
 
          return true;
 
        } else if (file_name.EndsWith(".txt")) {
 
          ofstream out(file_name.Data());
 
          out << TBufferJSON::ConvertToJSON(gRandom).Data();
 
          out.close();
 
          return true;
        }
      }
      
      return false;
    }

Friends And Related Symbol Documentation

operator>>

std::istream & operator>> ( std::istream & in, JRandom & object )

friend

Read random from input.

Parameters

in	input stream
object	random

Returns

input stream

Definition at line 73 of file JROOT/JRandom.hh.

    {
      return in >> static_cast<TString&>(object);
    }

operator<<

std::ostream & operator<< ( std::ostream & out, const JRandom & object )

friend

Write random to output.

Parameters

out	output stream
object	random

Returns

output stream

Definition at line 86 of file JROOT/JRandom.hh.

    {
      return out << object.Data();
    }

---

The documentation for this struct was generated from the following file:

• JROOT/JRandom.hh