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<?php |
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|
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declare(strict_types=1); |
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|
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2018-2020 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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|
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namespace WP_DEFENDER_VENDOR\CBOR\OtherObject; |
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|
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use WP_DEFENDER_VENDOR\Brick\Math\BigInteger; |
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use WP_DEFENDER_VENDOR\CBOR\Normalizable; |
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use WP_DEFENDER_VENDOR\CBOR\OtherObject as Base; |
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use WP_DEFENDER_VENDOR\CBOR\Utils; |
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use const INF; |
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use InvalidArgumentException; |
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use const NAN; |
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|
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final class DoublePrecisionFloatObject extends Base implements Normalizable |
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{ |
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public static function supportedAdditionalInformation(): array |
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{ |
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return [self::OBJECT_DOUBLE_PRECISION_FLOAT]; |
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} |
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|
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public static function createFromLoadedData(int $additionalInformation, ?string $data): Base |
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{ |
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return new self($additionalInformation, $data); |
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} |
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|
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public static function create(string $value): self |
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{ |
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if (mb_strlen($value, '8bit') !== 8) { |
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throw new InvalidArgumentException('The value is not a valid double precision floating point'); |
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} |
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|
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return new self(self::OBJECT_DOUBLE_PRECISION_FLOAT, $value); |
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} |
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|
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/** |
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* @deprecated The method will be removed on v3.0. Please rely on the WP_DEFENDER_VENDOR\CBOR\Normalizable interface |
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*/ |
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public function getNormalizedData(bool $ignoreTags = false) |
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{ |
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return $this->normalize(); |
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} |
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|
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/** |
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* @return float|int |
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*/ |
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public function normalize() |
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{ |
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$exponent = $this->getExponent(); |
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$mantissa = $this->getMantissa(); |
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$sign = $this->getSign(); |
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|
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if ($exponent === 0) { |
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$val = $mantissa * 2 ** (-(1022 + 52)); |
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} elseif ($exponent !== 0b11111111111) { |
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$val = ($mantissa + (1 << 52)) * 2 ** ($exponent - (1023 + 52)); |
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} else { |
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$val = $mantissa === 0 ? INF : NAN; |
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} |
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|
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return $sign * $val; |
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} |
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|
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public function getExponent(): int |
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{ |
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$data = $this->data; |
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Utils::assertString($data, 'Invalid data'); |
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|
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return Utils::binToBigInteger($data)->shiftedRight(52)->and(Utils::hexToBigInteger('7ff'))->toInt(); |
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} |
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|
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public function getMantissa(): int |
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{ |
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$data = $this->data; |
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Utils::assertString($data, 'Invalid data'); |
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|
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return Utils::binToBigInteger($data)->and(Utils::hexToBigInteger('fffffffffffff'))->toInt(); |
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} |
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|
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public function getSign(): int |
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{ |
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$data = $this->data; |
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Utils::assertString($data, 'Invalid data'); |
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$sign = Utils::binToBigInteger($data)->shiftedRight(63); |
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|
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return $sign->isEqualTo(BigInteger::one()) ? -1 : 1; |
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} |
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} |
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|
