internal::Double Class Reference

#include <ieee754.h>

Public Member Functions
	Double ()
	Double (double d)
	Double (uint64_t u)
double	Value () const
uint64_t	Uint64Value () const
double	NextPositiveDouble () const
bool	Sign () const
uint64_t	Significand () const
int	Exponent () const
bool	IsNan () const
bool	IsInf () const
bool	IsNormal () const
bool	IsZero () const
uint64_t	IntegerSignificand () const
int	IntegerExponent () const
uint64_t	ToBias () const

Static Public Member Functions
static unsigned	EffectiveSignificandSize (int order)

Private Attributes
union {
double   d_
uint64_t   u_
};

Static Private Attributes
static const int	kSignificandSize = 52
static const int	kExponentBias = 0x3FF
static const int	kDenormalExponent = 1 - kExponentBias
static const uint64_t	kSignMask = RAPIDJSON_UINT64_C2(0x80000000, 0x00000000)
static const uint64_t	kExponentMask = RAPIDJSON_UINT64_C2(0x7FF00000, 0x00000000)
static const uint64_t	kSignificandMask = RAPIDJSON_UINT64_C2(0x000FFFFF, 0xFFFFFFFF)
static const uint64_t	kHiddenBit = RAPIDJSON_UINT64_C2(0x00100000, 0x00000000)

Constructor & Destructor Documentation

internal::Double::Double ( )

inline

{}

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internal::Double::Double ( double  d )

inline

: d_(d) {}

internal::Double::Double ( uint64_t  u )

inline

: u_(u) {}

Member Function Documentation

static unsigned internal::Double::EffectiveSignificandSize ( int  order )

inlinestatic

 {
 if (order >= -1021)
 return 53;
 else if (order <= -1074)
 return 0;
 else
 return order + 1074;
 }

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int internal::Double::Exponent ( ) const

inline

{ return static_cast<int>(((u_ & kExponentMask) >> kSignificandSize) - kExponentBias); }

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int internal::Double::IntegerExponent ( ) const

inline

{ return (IsNormal() ? Exponent() : kDenormalExponent) - kSignificandSize; }

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uint64_t internal::Double::IntegerSignificand ( ) const

inline

{ return IsNormal() ? Significand() | kHiddenBit : Significand(); }

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bool internal::Double::IsInf ( ) const

inline

{ return (u_ & kExponentMask) == kExponentMask && Significand() == 0; }

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bool internal::Double::IsNan ( ) const

inline

{ return (u_ & kExponentMask) == kExponentMask && Significand() != 0; }

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bool internal::Double::IsNormal ( ) const

inline

{ return (u_ & kExponentMask) != 0 || Significand() == 0; }

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bool internal::Double::IsZero ( ) const

inline

{ return (u_ & (kExponentMask | kSignificandMask)) == 0; }

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double internal::Double::NextPositiveDouble ( ) const

inline

 {
 RAPIDJSON_ASSERT(!Sign());
 return Double(u_ + 1).Value();
 }

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bool internal::Double::Sign ( ) const

inline

{ return (u_ & kSignMask) != 0; }

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uint64_t internal::Double::Significand ( ) const

inline

{ return u_ & kSignificandMask; }

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uint64_t internal::Double::ToBias ( ) const

inline

{ return (u_ & kSignMask) ? ~u_ + 1 : u_ | kSignMask; }

uint64_t internal::Double::Uint64Value ( ) const

inline

{ return u_; }

double internal::Double::Value ( ) const

inline

{ return d_; }

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Member Data Documentation

union { ... }

double internal::Double::d_

const int internal::Double::kDenormalExponent = 1 - kExponentBias

staticprivate

const int internal::Double::kExponentBias = 0x3FF

staticprivate

const uint64_t internal::Double::kExponentMask = RAPIDJSON_UINT64_C2(0x7FF00000, 0x00000000)

staticprivate

const uint64_t internal::Double::kHiddenBit = RAPIDJSON_UINT64_C2(0x00100000, 0x00000000)

staticprivate

const uint64_t internal::Double::kSignificandMask = RAPIDJSON_UINT64_C2(0x000FFFFF, 0xFFFFFFFF)

staticprivate

const int internal::Double::kSignificandSize = 52

staticprivate

const uint64_t internal::Double::kSignMask = RAPIDJSON_UINT64_C2(0x80000000, 0x00000000)

staticprivate

uint64_t internal::Double::u_

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

• dep/rapidjson/rapidjson/internal/ieee754.h