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	IsNanOrInf () const
bool	IsNormal () const
bool	IsZero () const
uint64_t	IntegerSignificand () const
int	IntegerExponent () const
uint64_t	ToBias () const

Static Public Member Functions
static int	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)

Detailed Description

Definition at line 23 of file ieee754.h.

Constructor & Destructor Documentation

internal::Double::Double ( )

inline

Definition at line 25 of file ieee754.h.

{}

internal::Double::Double ( double  d )

inline

Definition at line 26 of file ieee754.h.

: d_(d) {}

internal::Double::Double ( uint64_t  u )

inline

Definition at line 27 of file ieee754.h.

: u_(u) {}

Member Function Documentation

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

inlinestatic

Definition at line 51 of file ieee754.h.

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

int internal::Double::Exponent ( ) const

inline

Definition at line 39 of file ieee754.h.

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

int internal::Double::IntegerExponent ( ) const

inline

Definition at line 48 of file ieee754.h.

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

uint64_t internal::Double::IntegerSignificand ( ) const

inline

Definition at line 47 of file ieee754.h.

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

bool internal::Double::IsInf ( ) const

inline

Definition at line 42 of file ieee754.h.

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

bool internal::Double::IsNan ( ) const

inline

Definition at line 41 of file ieee754.h.

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

bool internal::Double::IsNanOrInf ( ) const

inline

Definition at line 43 of file ieee754.h.

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

bool internal::Double::IsNormal ( ) const

inline

Definition at line 44 of file ieee754.h.

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

bool internal::Double::IsZero ( ) const

inline

Definition at line 45 of file ieee754.h.

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

double internal::Double::NextPositiveDouble ( ) const

inline

Definition at line 32 of file ieee754.h.

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

bool internal::Double::Sign ( ) const

inline

Definition at line 37 of file ieee754.h.

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

uint64_t internal::Double::Significand ( ) const

inline

Definition at line 38 of file ieee754.h.

{ return u_ & kSignificandMask; }

uint64_t internal::Double::ToBias ( ) const

inline

Definition at line 49 of file ieee754.h.

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

uint64_t internal::Double::Uint64Value ( ) const

inline

Definition at line 30 of file ieee754.h.

{ return u_; }

double internal::Double::Value ( ) const

inline

Definition at line 29 of file ieee754.h.

{ return d_; }

Member Data Documentation

union { ... }

double internal::Double::d_

Definition at line 70 of file ieee754.h.

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

staticprivate

Definition at line 63 of file ieee754.h.

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

staticprivate

Definition at line 62 of file ieee754.h.

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

staticprivate

Definition at line 65 of file ieee754.h.

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

staticprivate

Definition at line 67 of file ieee754.h.

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

staticprivate

Definition at line 66 of file ieee754.h.

const int internal::Double::kSignificandSize = 52

staticprivate

Definition at line 61 of file ieee754.h.

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

staticprivate

Definition at line 64 of file ieee754.h.

uint64_t internal::Double::u_

Definition at line 71 of file ieee754.h.

---

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

• art/rapidjson/internal/ieee754.h