testing::internal::FloatingPoint< RawType > Class Template Reference

#include <gtest-internal.h>

Public Types
typedef TypeWithSize< sizeof(RawType)>::UInt	Bits

Public Member Functions
	FloatingPoint (const RawType &x)
const Bits &	bits () const
Bits	exponent_bits () const
Bits	fraction_bits () const
Bits	sign_bit () const
bool	is_nan () const
bool	AlmostEquals (const FloatingPoint &rhs) const
float	Max ()
double	Max ()

Static Public Member Functions
static RawType	ReinterpretBits (const Bits bits)
static RawType	Infinity ()
static RawType	Max ()

Static Public Attributes
static const size_t	kBitCount = 8*sizeof(RawType)
static const size_t	kFractionBitCount
static const size_t	kExponentBitCount = kBitCount - 1 - kFractionBitCount
static const Bits	kSignBitMask = static_cast<Bits>(1) << (kBitCount - 1)
static const Bits	kFractionBitMask
static const Bits	kExponentBitMask = ~(kSignBitMask | kFractionBitMask)
static const uint32_t	kMaxUlps = 4

Detailed Description

template<typename RawType>
class testing::internal::FloatingPoint< RawType >

Definition at line 250 of file gtest-internal.h.

Member Typedef Documentation

Bits

template<typename RawType >

typedef TypeWithSize<sizeof(RawType)>::UInt testing::internal::FloatingPoint< RawType >::Bits

Definition at line 254 of file gtest-internal.h.

Constructor & Destructor Documentation

FloatingPoint()

template<typename RawType >

testing::internal::FloatingPoint< RawType >::FloatingPoint ( const RawType &  x )

inlineexplicit

Definition at line 298 of file gtest-internal.h.

{ u_.value_ = x; }

Member Function Documentation

AlmostEquals()

template<typename RawType >

bool testing::internal::FloatingPoint< RawType >::AlmostEquals ( const FloatingPoint< RawType > &  rhs ) const

inline

Definition at line 346 of file gtest-internal.h.

                                                    {
    // The IEEE standard says that any comparison operation involving
    // a NAN must return false.
    if (is_nan() || rhs.is_nan()) return false;
 
    return DistanceBetweenSignAndMagnitudeNumbers(u_.bits_, rhs.u_.bits_)
        <= kMaxUlps;
  }

bits()

template<typename RawType >

const Bits & testing::internal::FloatingPoint< RawType >::bits ( ) const

inline

Definition at line 322 of file gtest-internal.h.

{ return u_.bits_; }

exponent_bits()

template<typename RawType >

Bits testing::internal::FloatingPoint< RawType >::exponent_bits ( ) const

inline

Definition at line 325 of file gtest-internal.h.

{ return kExponentBitMask & u_.bits_; }

fraction_bits()

template<typename RawType >

Bits testing::internal::FloatingPoint< RawType >::fraction_bits ( ) const

inline

Definition at line 328 of file gtest-internal.h.

{ return kFractionBitMask & u_.bits_; }

Infinity()

template<typename RawType >

static RawType testing::internal::FloatingPoint< RawType >::Infinity ( )

inlinestatic

Definition at line 312 of file gtest-internal.h.

                            {
    return ReinterpretBits(kExponentBitMask);
  }

is_nan()

template<typename RawType >

bool testing::internal::FloatingPoint< RawType >::is_nan ( ) const

inline

Definition at line 334 of file gtest-internal.h.

                      {
    // It's a NAN if the exponent bits are all ones and the fraction
    // bits are not entirely zeros.
    return (exponent_bits() == kExponentBitMask) && (fraction_bits() != 0);
  }

Max() [1/3]

template<typename RawType >

static RawType testing::internal::FloatingPoint< RawType >::Max ( )

static

Max() [2/3]

float testing::internal::FloatingPoint< float >::Max ( )

inline

Definition at line 402 of file gtest-internal.h.

{ return FLT_MAX; }

Max() [3/3]

double testing::internal::FloatingPoint< double >::Max ( )

inline

Definition at line 404 of file gtest-internal.h.

{ return DBL_MAX; }

ReinterpretBits()

template<typename RawType >

static RawType testing::internal::FloatingPoint< RawType >::ReinterpretBits ( const Bits  bits )

inlinestatic

Definition at line 305 of file gtest-internal.h.

                                                  {
    FloatingPoint fp(0);
    fp.u_.bits_ = bits;
    return fp.u_.value_;
  }

sign_bit()

template<typename RawType >

Bits testing::internal::FloatingPoint< RawType >::sign_bit ( ) const

inline

Definition at line 331 of file gtest-internal.h.

{ return kSignBitMask & u_.bits_; }

Member Data Documentation

kBitCount

template<typename RawType >

const size_t testing::internal::FloatingPoint< RawType >::kBitCount = 8*sizeof(RawType)

static

Definition at line 259 of file gtest-internal.h.

kExponentBitCount

template<typename RawType >

const size_t testing::internal::FloatingPoint< RawType >::kExponentBitCount = kBitCount - 1 - kFractionBitCount

static

Definition at line 266 of file gtest-internal.h.

kExponentBitMask

template<typename RawType >

const Bits testing::internal::FloatingPoint< RawType >::kExponentBitMask = ~(kSignBitMask | kFractionBitMask)

static

Definition at line 276 of file gtest-internal.h.

kFractionBitCount

template<typename RawType >

const size_t testing::internal::FloatingPoint< RawType >::kFractionBitCount

static

Initial value:

=
    std::numeric_limits<RawType>::digits - 1

Definition at line 262 of file gtest-internal.h.

kFractionBitMask

template<typename RawType >

const Bits testing::internal::FloatingPoint< RawType >::kFractionBitMask

static

Initial value:

=
    ~static_cast<Bits>(0) >> (kExponentBitCount + 1)

Definition at line 272 of file gtest-internal.h.

kMaxUlps

template<typename RawType >

const uint32_t testing::internal::FloatingPoint< RawType >::kMaxUlps = 4

static

Definition at line 290 of file gtest-internal.h.

kSignBitMask

template<typename RawType >

const Bits testing::internal::FloatingPoint< RawType >::kSignBitMask = static_cast<Bits>(1) << (kBitCount - 1)

static

Definition at line 269 of file gtest-internal.h.

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

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