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<?php |
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namespace Smoren\BitmapTools\Models; |
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use Smoren\BitmapTools\Interfaces\BitmapInterface; |
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/** |
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* Bitmap class |
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* @author <[email protected]> Smoren |
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*/ |
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class Bitmap implements BitmapInterface |
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{ |
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/** |
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* @var int bitmap value |
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*/ |
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protected int $value; |
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/** |
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* @inheritDoc |
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*/ |
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public static function create($value): BitmapInterface |
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{ |
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if(is_array($value)) { |
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return static::createFromArray($value); |
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} |
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if($value instanceof BitmapInterface) { |
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return new static($value->getValue()); |
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} |
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return new static($value); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public static function createFromArray(array $bits): BitmapInterface |
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{ |
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$value = 0; |
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foreach($bits as $code) { |
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$value += 2**$code; |
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} |
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return new static($value); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public static function toBitmap($bitmap): BitmapInterface |
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{ |
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return ($bitmap instanceof BitmapInterface) ? $bitmap : static::create($bitmap); |
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} |
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/** |
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* Bitmap constructor. |
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* @param int $value bitmap value |
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*/ |
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final public function __construct(int $value) |
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{ |
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$this->value = $value; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getValue(): int |
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{ |
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return $this->value; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function intersectsWith($bitmap): bool |
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{ |
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$bitmap = static::toBitmap($bitmap); |
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return ($this->getValue() & $bitmap->getValue()) !== 0; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function includes($bitmap): bool |
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{ |
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$bitmap = static::toBitmap($bitmap); |
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return ($this->getValue() & $bitmap->getValue()) === $bitmap->getValue(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function isEqualWith($bitmap): bool |
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{ |
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$bitmap = static::toBitmap($bitmap); |
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return $this->getValue() === $bitmap->getValue(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function add($bitmap): BitmapInterface |
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{ |
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$bitmap = static::toBitmap($bitmap); |
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return new static($this->getValue() | $bitmap->getValue()); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function sub($bitmap): BitmapInterface |
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{ |
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$bitmap = static::toBitmap($bitmap); |
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return new static($this->getValue() & (~$bitmap->getValue())); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function hasBit(int $bitPosition): bool |
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{ |
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return $this->intersectsWith(Bitmap::createFromArray([$bitPosition])); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function toArray(): array |
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{ |
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$bitmap = $this->getValue(); |
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$result = []; |
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$i = 0; |
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while($bitmap) { |
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if($bitmap % 2) { |
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$result[] = $i; |
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} |
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$bitmap = (int)($bitmap / 2); |
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++$i; |
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} |
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return $result; |
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} |
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} |
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Smoren /
bitmap-tools-php
