[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
Class to store collections of bits (binary values that can be 0 or 1).
Source position: classesh.inc line 669
type TBits = class(TObject)  | 
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public  | 
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constructor Create(); virtual;  | 
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Creates a new bits collection.  | 
destructor Destroy; override;  | 
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Destroys a bit collection.  | 
function GetFSize;  | 
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Returns the number of records used to store the bits.  | 
procedure SetOn();  | 
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Turn a particular bit on.  | 
procedure Clear();  | 
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Clears a particular bit.  | 
procedure Clearall;  | 
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Clears all bits in the array.  | 
procedure CopyBits();  | 
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Copy bits from one bits set to another.  | 
procedure AndBits();  | 
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Performs an and operation on the bits.  | 
procedure OrBits();  | 
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Performs an or operation on the bits.  | 
procedure XorBits();  | 
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Performs a xor operation on the bits.  | 
procedure NotBits();  | 
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Performs a not operation on the bits.  | 
function Get();  | 
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Retrieve the value of a particular bit.  | 
procedure Grow();  | 
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Expands the bits array to the requested size.  | 
function Equals();  | 
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Determines whether the bits of 2 arrays are equal.  | 
procedure SetIndex();  | 
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Sets the start position for FindNextBit and FindPrevBit.  | 
function FindFirstBit();  | 
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Find first bit with a particular value.  | 
function FindNextBit;  | 
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Searches the next bit with a particular value.  | 
function FindPrevBit;  | 
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Searches the previous bit with a particular value.  | 
function OpenBit;  | 
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Returns the position of the first bit that is set to False.  | 
property Bits []: Boolean; default; [rw]  | 
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Access to all bits in the array.  | 
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Current size of the array of bits.  | 
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end;  | 
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Class to store collections of bits (binary values that can be 0 or 1).  | 
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Base class of all classes.  | 
TBits can be used to store collections of bits in an indexed array. This is especially useful for storing collections of booleans: Normally the size of a boolean is the size of the smallest enumerated type, i.e. 1 byte. Since a bit can take 2 values it can be used to store a boolean as well. Since TBits can store 8 bits in a byte, it takes 8 times less space to store an array of booleans in a TBits class then it would take to store them in a conventional array.
TBits introduces methods to store and retrieve bit values, apply masks, and search for bits.