System.TDoubleRec

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Delphi

TDoubleRec = packed record

C++

struct DECLSPEC_DRECORD TDoubleRec
{
private:
    double aDouble;
    UInt8 __fastcall InternalGetBytes(unsigned Index);
    UInt16 __fastcall InternalGetWords(unsigned Index);
    void __fastcall InternalSetBytes(unsigned Index, const UInt8 Value);
    void __fastcall InternalSetWords(unsigned Index, const UInt16 Value);
    UInt8 __fastcall GetBytes(unsigned Index);
    UInt16 __fastcall GetWords(unsigned Index);
    void __fastcall SetBytes(unsigned Index, const UInt8 Value);
    void __fastcall SetWords(unsigned Index, const UInt16 Value);
    unsigned __int64 __fastcall GetExp();
    unsigned __int64 __fastcall GetFrac();
    bool __fastcall GetSign();
    void __fastcall SetExp(unsigned __int64 NewExp);
    void __fastcall SetFrac(unsigned __int64 NewFrac);
    void __fastcall SetSign(bool NewSign);
public:
    int __fastcall Exponent();
    Extended __fastcall Fraction();
    unsigned __int64 __fastcall Mantissa();
    __property bool Sign = {read=GetSign, write=SetSign};
    __property unsigned __int64 Exp = {read=GetExp, write=SetExp};
    __property unsigned __int64 Frac = {read=GetFrac, write=SetFrac};
    TFloatSpecial __fastcall SpecialType();
    void __fastcall BuildUp(const bool SignFlag, const unsigned __int64 Mantissa, const int Exponent);
    static TDoubleRec __fastcall _op_Explicit(Extended a);
    __property UInt8 Bytes[unsigned Index] = {read=GetBytes, write=SetBytes};
    __property UInt16 Words[unsigned Index] = {read=GetWords, write=SetWords};
};

Properties

Type Visibility Source Unit Parent
record
struct
public
System.pas
System.hpp
System System

Description

Attention: TDoubleRec is deprecated. Please use SysUtils.TDoubleHelper.

Provides support for manipulating double precision floating-point values.

A TDoubleRec can be used to perform low-level operations on a double precision floating-point value. For example, the sign, the exponent, and the mantissa can be changed separately.

Note:

  • To manipulate a double-precision floating-point data type, it is recommended that you use TDoubleHelper. However, TDoubleRec is not obsolete, and you can use TDoubleRec to allocate double-precision floating-point data.

See Also