TQWordHelper¶

Helper for a QWord-typed ordinal value.

Declaration¶

Source position: syshelph.inc line 1281

type

  TQWordHelper = type helper for QWord
    const
      MaxValue = High(qword);
      MinValue = Low(qword);
      MaxBit = High(TQwordBitIndex);
      MinBit = Low(TQwordBitIndex);
      MaxNibble = High(TQwordNibbleIndex);
      MinNibble = Low(TQwordNibbleIndex);
      MaxByte = High(TQwordByteIndex);
      MinByte = Low(TQwordByteIndex);
      MaxWord = High(TQwordWordIndex);
      MinWord = Low(TQwordWordIndex);
      MaxDword = High(TQwordDwordIndex);
      MinDword = Low(TQwordDwordIndex);
    public
      class function Parse : QWord;
      class function Size : Integer;
      class function ToString(const AValue: QWord) : string; overload;
      function ToString : string; overload;
      class function TryParse : Boolean;
      function ToBoolean : Boolean;
      function ToDouble : Double;
      function ToExtended : Extended;
      function ToBinString : string;
      function ToHexString(const AMinDigits: Integer) : string; overload;
      function ToHexString : string; overload;
      function ToSingle : Single;
      function SetBit : QWord;
      function ClearBit : QWord;
      function ToggleBit : QWord;
      function TestBit : Boolean;
      procedure Clear;
      function HighestSetBitPos : Int8;
      function LowestSetBitPos : Int8;
      function SetBitsCount : Byte;
      property Bits[aIndex : TQwordBitIndex = 0..63]: Boolean; {rw}
      property Nibbles[aIndex : TQwordNibbleIndex = 0..15]: nibble; {rw}
      property Bytes[aIndex : TQwordByteIndex = 0..7]: Byte; {rw}
      property Words[aIndex : TQwordWordIndex = 0..3]: Word; {rw}
      property DWords[aIndex : TQwordDwordIndex = 0..1]: DWord; {rw}
  end;

Inheritance¶

TQWordHelper

Description¶

TQWordHelper contains some auxiliary routines for a QWord-typed ordinal value. It consists mainly of conversion routines to and from other types.

Properties¶

Member	Visibility	Description
Bits	public	Read or write a bit.
Bytes	public	Read or write a byte.
DWords	public	Read or write a dword.
Nibbles	public	Read or write a nibble.
Words	public	Read or write a word.

Methods¶

Member	Visibility	Description
Clear	public	Set value to 0.
ClearBit	public	Set bit to 0.
HighestSetBitPos	public	Return the position of the leftmost bit set.
LowestSetBitPos	public	Return the position of the rightmost bit set.
Parse	public	Convert from a string.
SetBit	public	Set bit to 1.
SetBitsCount	public	Count number of bits set.
Size	public	Size, in bytes, of the QWord value.
TestBit	public	Check bit.
ToBinString	public	Convert to a binary string representation.
ToBoolean	public	Convert to a boolean value.
ToDouble	public	Convert to a double-sized floating point value.
ToExtended	public	Convert to an extended-sized floating point value.
ToggleBit	public	Invert bit.
ToHexString	public	Convert to a hexadecimal string representation.
ToSingle	public	Convert to an single-sized floating point value.
ToString	public	Convert the value to string.
TryParse	public	Try to convert a string to a QWord, report success or failure.

Name	Description
TStringHelper	Helper type for strings.
TShortIntHelper	Helper for a ShortInt-typed ordinal value.
TSmallIntHelper	Helper for a SmallInt-typed ordinal value.
TWordHelper	Helper for a Word-typed ordinal value.
TCardinalHelper	Helper for a Cardinal-typed ordinal value.
TIntegerHelper	Helper for a Integer-typed ordinal value.
TInt64Helper	Helper for a Int64-typed ordinal value.
TByteHelper	Helper for a byte-typed ordinal value.
TNativeIntHelper	Helper for a NativeInt-typed ordinal value.
TNativeUIntHelper	Helper for a NativeUInt-typed ordinal value.