testing::internal::Random Class Reference

#include <gtest-internal.h>

Public Member Functions
	Random (uint32_t seed)
void	Reseed (uint32_t seed)
uint32_t	Generate (uint32_t range)

Static Public Attributes
static const uint32_t	kMaxRange = 1u << 31

Detailed Description

Definition at line 870 of file gtest-internal.h.

Constructor & Destructor Documentation

Random()

testing::internal::Random::Random ( uint32_t  seed )

inlineexplicit

Definition at line 874 of file gtest-internal.h.

: state_(seed) {}

Member Function Documentation

Generate()

uint32_t testing::internal::Random::Generate

(

uint32_t

range

)

Definition at line 348 of file gtest.cc.

                                        {
  // These constants are the same as are used in glibc's rand(3).
  // Use wider types than necessary to prevent unsigned overflow diagnostics.
  state_ = static_cast<uint32_t>(1103515245ULL*state_ + 12345U) % kMaxRange;
 
  GTEST_CHECK_(range > 0)
      << "Cannot generate a number in the range [0, 0).";
  GTEST_CHECK_(range <= kMaxRange)
      << "Generation of a number in [0, " << range << ") was requested, "
      << "but this can only generate numbers in [0, " << kMaxRange << ").";
 
  // Converting via modulus introduces a bit of downward bias, but
  // it's simple, and a linear congruential generator isn't too good
  // to begin with.
  return state_ % range;
}

Reseed()

void testing::internal::Random::Reseed ( uint32_t  seed )

inline

Definition at line 876 of file gtest-internal.h.

{ state_ = seed; }

Member Data Documentation

kMaxRange

const uint32_t testing::internal::Random::kMaxRange = 1u << 31

static

Definition at line 872 of file gtest-internal.h.

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The documentation for this class was generated from the following files:

• /media/home/debian/src/github/tesseract-ocr/tesseract/unittest/third_party/googletest/googletest/include/gtest/internal/gtest-internal.h
• /media/home/debian/src/github/tesseract-ocr/tesseract/unittest/third_party/googletest/googletest/src/gtest.cc