Public Types
enum	distributionType { constant, uniform, geometric, gauss }

Public Member Functions
	fileSizeGenerator (const std::string &aDistribution, size_t size_parameter1, size_t size_parameter2, size_t max_size)

size_t	getNumber ()

Private Attributes
std::mt19937	generator

std::geometric_distribution< size_t >	geometric_dist

std::uniform_int_distribution< size_t >	uniform_dist

std::normal_distribution< double >	normal_dist

distributionType	distribution

size_t	parameter1

size_t	parameter2

size_t	maxFileSize

Detailed Description

Definition at line 208 of file fileopstest.cpp.

Member Enumeration Documentation

◆ distributionType

enum fileSizeGenerator::distributionType

Enumerator
constant
uniform
geometric
gauss

Definition at line 210 of file fileopstest.cpp.

                           {
         constant,
         uniform,
         geometric,
         gauss
     };

Constructor & Destructor Documentation

◆ fileSizeGenerator()

fileSizeGenerator::fileSizeGenerator	(	const std::string &	aDistribution,
		size_t	size_parameter1,
		size_t	size_parameter2,
		size_t	max_size
	)

inline

Definition at line 226 of file fileopstest.cpp.

                                        :
         parameter1(size_parameter1),
         parameter2(size_parameter2),
         maxFileSize(max_size) {
         static std::random_device rd;
         generator.seed(rd());
  
         if (aDistribution == "constant") {
             distribution = constant;
         } else if (aDistribution == "uniform") {
             distribution = uniform;
             uniform_dist.param(decltype(uniform_dist)::param_type(parameter1, parameter2));
         } else if (aDistribution == "geometric") {
             distribution = geometric;
             geometric_dist.param(decltype(geometric_dist)::param_type(1. / parameter1));
         } else if (aDistribution == "gauss") {
             distribution = gauss;
             normal_dist.param(decltype(normal_dist)::param_type(static_cast<double>(parameter1),
                               static_cast<double>(parameter2)));
         } else {
             throw std::runtime_error("bad distribution parameter");
         }
     }

References constant, distribution, gauss, generator, geometric, geometric_dist, normal_dist, parameter1, parameter2, uniform, and uniform_dist.

Member Function Documentation

◆ getNumber()

size_t fileSizeGenerator::getNumber ( )

inline

Definition at line 252 of file fileopstest.cpp.

                        {
         size_t result;
  
         switch (distribution) {
             case constant:
                 result = parameter1;
                 break;
  
             case uniform:
                 result = uniform_dist(generator);
                 break;
  
             case geometric:
                 result = geometric_dist(generator);
                 break;
  
             case gauss:
                 result = normal_dist(generator);
                 break;
  
             default:
                 return 0;
         }
  
         if (result > maxFileSize) {
             result = maxFileSize;
         }
  
         return result;
     }