TDoubleHelper

type TDoubleHelper = type helper

public

Const

  Epsilon = Epsilon; = 4.9406564584124654418e-324

Precision for this floating point type

  MaxValue = MaxValue; = 1.7976931348623157081e+308

Largest possible value for the Double floating point type

  MinValue = MinValue; = - 1.7976931348623157081e+308

Smallest (negative) possible value for the Double floating point type

  PositiveInfinity = PositiveInfinity; = 1.0 / 0.0

Positive infinity as represented by a Double floating point type

  NegativeInfinity = NegativeInfinity; = (- 1.0) / (0.0)

Negative infinity as represented by a Double floating point type

  NaN = NaN; = 0.0 / 0.0

Representation of NaN (Not a Number)

  class function IsInfinity();

Check whether a value is positive or negative infinity.

  class function IsNan();

Check whether a value equals NaN.

  class function IsNegativeInfinity();

Check whether a value is negative infinity.

  class function IsPositiveInfinity();

Check whether a value is positive infinity.

  class function Parse();

Convert a string to a floating point value

  class function Size;

Size (in bytes) of a Double-sized floating point value.

  class function ToString();

Convert a Double-sized floating point value to a string

  class function TryParse();

Try to convert a string to a Double-sized floating point value.

  procedure BuildUp();

Build a Double-sized floating point from its composing parts

  function Exponent;

Exponent of the floating-point value

  function Fraction;

Fraction of the floating-point value

  function Mantissa;

Mantissa of the floating-point

  function SpecialType;

Return the type of the Double-sized floating point value

  property Bytes []: Byte; [rw]

Indexed access to the individual bytes of the floating point value

  property Words []: Word; [rw]

Indexed access to the words that make up the floating point value

  property Sign: Boolean; [rw]

Sign of the floating point value

  property Exp: QWord; [rw]

The bit pattern of the exponent as stored in memory.

  property Frac: QWord; [rw]

Bitpattern that makes up the fractional part.

end;

TDoubleHelper

Helper for Double floating point type

TDoubleHelper

Helper for Double floating point type

TExtendedHelper

Helper for Extended floating point type