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

#include <gtest-internal.h>

Classes
union	FloatingPointUnion

Public Types
typedef TypeWithSize< sizeof(RawType)>::UInt	Bits
typedef TypeWithSize< sizeof(RawType)>::UInt	Bits
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
	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
	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 ()
template<>
float	Max ()
template<>
double	Max ()
template<>
float	Max ()
template<>
double	Max ()

Static Public Member Functions
static RawType	ReinterpretBits (const Bits bits)
static RawType	Infinity ()
static RawType	Max ()
static RawType	ReinterpretBits (const Bits bits)
static RawType	Infinity ()
static RawType	Max ()
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 size_t	kMaxUlps = 4

Static Private Member Functions
static Bits	SignAndMagnitudeToBiased (const Bits &sam)
static Bits	DistanceBetweenSignAndMagnitudeNumbers (const Bits &sam1, const Bits &sam2)
static Bits	SignAndMagnitudeToBiased (const Bits &sam)
static Bits	DistanceBetweenSignAndMagnitudeNumbers (const Bits &sam1, const Bits &sam2)
static Bits	SignAndMagnitudeToBiased (const Bits &sam)
static Bits	DistanceBetweenSignAndMagnitudeNumbers (const Bits &sam1, const Bits &sam2)

Private Attributes
FloatingPointUnion	u_

Detailed Description

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

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

Member Typedef Documentation

template<typename RawType>

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

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

template<typename RawType>

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

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

template<typename RawType>

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

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

Constructor & Destructor Documentation

template<typename RawType>

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

inlineexplicit

Definition at line 310 of file gtest-internal.h.

References x.

{ u_.value_ = x; }

template<typename RawType>

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

inlineexplicit

Definition at line 310 of file gtest-internal.h.

References x.

{ u_.value_ = x; }

template<typename RawType>

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

inlineexplicit

Definition at line 310 of file gtest-internal.h.

References x.

{ u_.value_ = x; }

Member Function Documentation

template<typename RawType>

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

inline

Definition at line 358 of file gtest-internal.h.

References testing::internal::FloatingPoint< RawType >::FloatingPointUnion::bits_, testing::internal::FloatingPoint< RawType >::is_nan(), and testing::internal::FloatingPoint< RawType >::u_.

                                                    {
    // 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;
  }

template<typename RawType>

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

inline

Definition at line 358 of file gtest-internal.h.

References testing::internal::FloatingPoint< RawType >::FloatingPointUnion::bits_, testing::internal::FloatingPoint< RawType >::is_nan(), and testing::internal::FloatingPoint< RawType >::u_.

                                                    {
    // 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;
  }

template<typename RawType>

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

inline

Definition at line 358 of file gtest-internal.h.

References testing::internal::FloatingPoint< RawType >::FloatingPointUnion::bits_, testing::internal::FloatingPoint< RawType >::is_nan(), and testing::internal::FloatingPoint< RawType >::u_.

                                                    {
    // 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;
  }

template<typename RawType>

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

inline

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

{ return u_.bits_; }

template<typename RawType>

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

inline

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

{ return u_.bits_; }

template<typename RawType>

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

inline

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

{ return u_.bits_; }

template<typename RawType>

static Bits testing::internal::FloatingPoint< RawType >::DistanceBetweenSignAndMagnitudeNumbers ( const Bits &  sam1, const Bits &  sam2  )

inlinestaticprivate

Definition at line 401 of file gtest-internal.h.

                                                                       {
    const Bits biased1 = SignAndMagnitudeToBiased(sam1);
    const Bits biased2 = SignAndMagnitudeToBiased(sam2);
    return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
  }

template<typename RawType>

static Bits testing::internal::FloatingPoint< RawType >::DistanceBetweenSignAndMagnitudeNumbers ( const Bits &  sam1, const Bits &  sam2  )

inlinestaticprivate

Definition at line 401 of file gtest-internal.h.

                                                                       {
    const Bits biased1 = SignAndMagnitudeToBiased(sam1);
    const Bits biased2 = SignAndMagnitudeToBiased(sam2);
    return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
  }

template<typename RawType>

static Bits testing::internal::FloatingPoint< RawType >::DistanceBetweenSignAndMagnitudeNumbers ( const Bits &  sam1, const Bits &  sam2  )

inlinestaticprivate

Definition at line 401 of file gtest-internal.h.

                                                                       {
    const Bits biased1 = SignAndMagnitudeToBiased(sam1);
    const Bits biased2 = SignAndMagnitudeToBiased(sam2);
    return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
  }

template<typename RawType>

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

inline

Definition at line 337 of file gtest-internal.h.

{ return kExponentBitMask & u_.bits_; }

template<typename RawType>

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

inline

Definition at line 337 of file gtest-internal.h.

{ return kExponentBitMask & u_.bits_; }

template<typename RawType>

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

inline

Definition at line 337 of file gtest-internal.h.

{ return kExponentBitMask & u_.bits_; }

template<typename RawType>

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

inline

Definition at line 340 of file gtest-internal.h.

{ return kFractionBitMask & u_.bits_; }

template<typename RawType>

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

inline

Definition at line 340 of file gtest-internal.h.

{ return kFractionBitMask & u_.bits_; }

template<typename RawType>

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

inline

Definition at line 340 of file gtest-internal.h.

{ return kFractionBitMask & u_.bits_; }

template<typename RawType>

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

inlinestatic

Definition at line 324 of file gtest-internal.h.

                            {
    return ReinterpretBits(kExponentBitMask);
  }

template<typename RawType>

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

inlinestatic

Definition at line 324 of file gtest-internal.h.

                            {
    return ReinterpretBits(kExponentBitMask);
  }

template<typename RawType>

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

inlinestatic

Definition at line 324 of file gtest-internal.h.

                            {
    return ReinterpretBits(kExponentBitMask);
  }

template<typename RawType>

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

inline

Definition at line 346 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);
  }

template<typename RawType>

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

inline

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

Referenced by testing::internal::FloatingPoint< RawType >::AlmostEquals(), and testing::internal::FloatingEqMatcher< FloatType >::Impl< T >::MatchAndExplain().

                      {
    // 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);
  }

template<typename RawType>

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

inline

Definition at line 346 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);
  }

template<typename RawType>

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

static

template<typename RawType>

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

static

template<typename RawType>

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

static

template<>

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

inline

Definition at line 414 of file gtest-internal.h.

{ return FLT_MAX; }

template<>

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

inline

Definition at line 414 of file gtest-internal.h.

{ return FLT_MAX; }

template<>

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

inline

Definition at line 414 of file gtest-internal.h.

{ return FLT_MAX; }

template<>

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

inline

Definition at line 416 of file gtest-internal.h.

References testing::internal::GetTestTypeId(), testing::internal::GetTypeId(), and GTEST_API_.

{ return DBL_MAX; }

template<>

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

inline

Definition at line 416 of file gtest-internal.h.

{ return DBL_MAX; }

template<>

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

inline

Definition at line 416 of file gtest-internal.h.

References testing::internal::GetTestTypeId(), testing::internal::GetTypeId(), and GTEST_API_.

{ return DBL_MAX; }

template<typename RawType>

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

inlinestatic

Definition at line 317 of file gtest-internal.h.

References testing::internal::FloatingPoint< RawType >::FloatingPointUnion::bits_, testing::internal::FloatingPoint< RawType >::u_, and testing::internal::FloatingPoint< RawType >::FloatingPointUnion::value_.

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

template<typename RawType>

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

inlinestatic

Definition at line 317 of file gtest-internal.h.

References testing::internal::FloatingPoint< RawType >::FloatingPointUnion::bits_, testing::internal::FloatingPoint< RawType >::u_, and testing::internal::FloatingPoint< RawType >::FloatingPointUnion::value_.

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

template<typename RawType>

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

inlinestatic

Definition at line 317 of file gtest-internal.h.

References testing::internal::FloatingPoint< RawType >::FloatingPointUnion::bits_, testing::internal::FloatingPoint< RawType >::u_, and testing::internal::FloatingPoint< RawType >::FloatingPointUnion::value_.

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

template<typename RawType>

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

inline

Definition at line 343 of file gtest-internal.h.

{ return kSignBitMask & u_.bits_; }

template<typename RawType>

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

inline

Definition at line 343 of file gtest-internal.h.

{ return kSignBitMask & u_.bits_; }

template<typename RawType>

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

inline

Definition at line 343 of file gtest-internal.h.

{ return kSignBitMask & u_.bits_; }

template<typename RawType>

static Bits testing::internal::FloatingPoint< RawType >::SignAndMagnitudeToBiased ( const Bits &  sam )

inlinestaticprivate

Definition at line 389 of file gtest-internal.h.

                                                        {
    if (kSignBitMask & sam) {
      // sam represents a negative number.
      return ~sam + 1;
    } else {
      // sam represents a positive number.
      return kSignBitMask | sam;
    }
  }

template<typename RawType>

static Bits testing::internal::FloatingPoint< RawType >::SignAndMagnitudeToBiased ( const Bits &  sam )

inlinestaticprivate

Definition at line 389 of file gtest-internal.h.

                                                        {
    if (kSignBitMask & sam) {
      // sam represents a negative number.
      return ~sam + 1;
    } else {
      // sam represents a positive number.
      return kSignBitMask | sam;
    }
  }

template<typename RawType>

static Bits testing::internal::FloatingPoint< RawType >::SignAndMagnitudeToBiased ( const Bits &  sam )

inlinestaticprivate

Definition at line 389 of file gtest-internal.h.

                                                        {
    if (kSignBitMask & sam) {
      // sam represents a negative number.
      return ~sam + 1;
    } else {
      // sam represents a positive number.
      return kSignBitMask | sam;
    }
  }

Member Data Documentation

template<typename RawType>

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

static

Definition at line 271 of file gtest-internal.h.

template<typename RawType>

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

static

Definition at line 278 of file gtest-internal.h.

template<typename RawType>

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

static

Definition at line 288 of file gtest-internal.h.

template<typename RawType>

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

static

Initial value:

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

Definition at line 274 of file gtest-internal.h.

template<typename RawType>

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

static

Initial value:

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

Definition at line 284 of file gtest-internal.h.

template<typename RawType>

static const size_t testing::internal::FloatingPoint< RawType >::kMaxUlps = 4

static

Definition at line 302 of file gtest-internal.h.

template<typename RawType>

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

static

Definition at line 281 of file gtest-internal.h.

template<typename RawType>

FloatingPointUnion testing::internal::FloatingPoint< RawType >::u_

private

Definition at line 408 of file gtest-internal.h.

Referenced by testing::internal::FloatingPoint< RawType >::AlmostEquals(), and testing::internal::FloatingPoint< RawType >::ReinterpretBits().

---

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

• proxygen/fizz/build_/gtest/src/gtest/googletest/include/gtest/internal/gtest-internal.h