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
template<>
float	Max ()
template<>
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 246 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 250 of file gtest-internal.h.

Constructor & Destructor Documentation

FloatingPoint()

template<typename RawType>

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

inlineexplicit

Definition at line 294 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 340 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 316 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 319 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 322 of file gtest-internal.h.

{ return kFractionBitMask & u_.bits_; }

Infinity()

template<typename RawType>

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

inlinestatic

Definition at line 308 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 328 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]

template<>

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

inline

Definition at line 396 of file gtest-internal.h.

                                       {
  return FLT_MAX;
}

Max() [3/3]

template<>

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

inline

Definition at line 400 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 301 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 325 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 255 of file gtest-internal.h.

kExponentBitCount

template<typename RawType>

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

static

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

kExponentBitMask

template<typename RawType>

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

static

Definition at line 272 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 258 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 268 of file gtest-internal.h.

kMaxUlps

template<typename RawType>

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

static

Definition at line 286 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 265 of file gtest-internal.h.

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

• googletest/googletest/include/gtest/internal/gtest-internal.h