TDoubleHelper helper

Declaration

Descends from it: TRealHelper

Description

TDoubleHelper is the helper type for the Double-sized floating point type. It contains some conversion methods, as well as access to the low-level structure of the floating-point representation of a Double.

See also

• TDoubleHelper
• TExtendedHelper

Properties

Bytes	public	Indexed access to the individual bytes of the floating point value.
Words	public	Indexed access to the words that make up the floating point value.
Sign	public	Sign of the floating point value.
Exp	public	The bit pattern of the exponent as stored in memory.
Frac	public	Bitpattern that makes up the fractional part.

Methods

IsInfinity	public	Check whether a value is positive or negative infinity.
IsNan	public	Check whether a value equals NaN.
IsNegativeInfinity	public	Check whether a value is negative infinity.
IsPositiveInfinity	public	Check whether a value is positive infinity.
Parse	public	Convert a string to a floating point value.
Size	public	Size (in bytes) of a Double-sized floating point value.
ToString	public	Convert a Double-sized floating point value to a string.
TryParse	public	Try to convert a string to a Double-sized floating point value.
BuildUp	public	Build a Double-sized floating point from its composing parts.
Exponent	public	Exponent of the floating-point value.
Fraction	public	Fraction of the floating-point value.
Mantissa	public	Mantissa of the floating-point.
SpecialType	public	Return the type of the Double-sized floating point value.

Types and constants

Epsilon	public	Precision for this floating point type.
MachineEpsilon	public
MaxValue	public	Largest possible value for the Double floating point type.
MinValue	public	Smallest (negative) possible value for the Double floating point type.
PositiveInfinity	public	Positive infinity as represented by a Double floating point type.
NegativeInfinity	public	Negative infinity as represented by a Double floating point type.
NaN	public	Representation of NaN (Not a Number).