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Class to store collections of bits (binary values that can be 0 or 1)
Source position: classesh.inc line 383
| type TBits = class(TObject) | ||
| public | ||
| constructor Create(); virtual; | 
 | Creates a new bits collection. | 
| destructor Destroy; override; | 
 | Destroys a bit collection | 
| function GetFSize; | 
 | Returns the number of records used to store the bits. | 
| procedure SetOn(); | 
 | Turn a particular bit on. | 
| procedure Clear(); | 
 | Clears a particular bit. | 
| procedure Clearall; | 
 | Clears all bits in the array. | 
| procedure AndBits(); | 
 | Performs an and operation on the bits. | 
| procedure OrBits(); | 
 | Performs an or operation on the bits. | 
| procedure XorBits(); | 
 | Performs a xor operation on the bits. | 
| procedure NotBits(); | 
 | Performs a not operation on the bits. | 
| function Get(); | 
 | Retrieve the value of a particular bit | 
| procedure Grow(); | 
 | Expands the bits array to the requested size. | 
| function Equals(); | 
 | Determines whether the bits of 2 arrays are equal. | 
| procedure SetIndex(); | 
 | Sets the start position for FindNextBit and FindPrevBit | 
| function FindFirstBit(); | 
 | Find first bit with a particular value | 
| function FindNextBit; | 
 | Searches the next bit with a particular value. | 
| function FindPrevBit; | 
 | Searches the previous bit with a particular value. | 
| function OpenBit; | 
 | Returns the position of the first bit that is set to False. | 
| property Bits []: Boolean; default; [rw] | 
 | Access to all bits in the array. | 
| 
 | Current size of the array of bits. | |
| end; | 
| 
 | Class to store collections of bits (binary values that can be 0 or 1) | |
| | | ||
| 
 | 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.