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<?php |
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declare(strict_types = 1); |
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namespace Innmind\AMQP\Transport\Frame\Value; |
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use Innmind\AMQP\{ |
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Transport\Frame\Value, |
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Exception\OutOfRangeValue, |
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Exception\StringNotOfExpectedLength |
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}; |
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use Innmind\Math\{ |
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Algebra\Integer, |
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DefinitionSet\Set, |
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DefinitionSet\Range |
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}; |
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use Innmind\Immutable\Str; |
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/** |
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* Same as shortshort |
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*/ |
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final class SignedOctet implements Value |
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{ |
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private static $definitionSet; |
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private $value; |
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private $original; |
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public function __construct(Integer $octet) |
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{ |
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if (!self::definitionSet()->contains($octet)) { |
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throw new OutOfRangeValue($octet, self::definitionSet()); |
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} |
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$this->original = $octet; |
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} |
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public static function fromString(Str $string): Value |
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{ |
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$string = $string->toEncoding('ASCII'); |
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if ($string->length() !== 1) { |
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throw new StringNotOfExpectedLength($string, 1); |
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} |
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[, $value] = unpack('c', (string) $string); |
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return new self(new Integer($value)); |
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} |
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public static function cut(Str $string): Str |
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{ |
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return $string->toEncoding('ASCII')->substring(0, 1); |
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} |
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public function original(): Integer |
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{ |
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return $this->original; |
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} |
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public function __toString(): string |
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{ |
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return $this->value ?? $this->value = pack('c', $this->original->value()); |
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} |
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public static function definitionSet(): Set |
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{ |
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return self::$definitionSet ?? self::$definitionSet = Range::inclusive( |
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new Integer(-128), |
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new Integer(127) |
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); |
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} |
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} |
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Innmind /
AMQP
