<?php

declare(strict_types=1);

namespace PHPJava\Kernel\Structures;

class DoubleInfo implements StructureInterface

{

use \PHPJava\Kernel\Core\BinaryReader;

use \PHPJava\Kernel\Core\ConstantPool;

use \PHPJava\Kernel\Core\DebugTool;

/**

* @var int

*/

private $highBytes;

/**

* @var int

*/

private $lowBytes;

/**

* @var int

*/

private $realByte;

public function execute(): void

{

$this->highBytes = $this->readUnsignedInt();

$this->lowBytes = $this->readUnsignedInt();

}

public function getBytes(): float

{

if ($this->realByte) {

return $this->realByte;

}

$bits = ($this->highBytes << 32) + $this->lowBytes;

$s = ($bits >> 63) == 0 ? 1 : -1;

$e = ($bits >> 52) & 0x7ff;

$m = ($e == 0) ? (($bits & 0xfffffffffffff) << 1) : ($bits & 0xfffffffffffff) | 0x10000000000000;

return $this->realByte = ($s * $m * pow(2, $e - 1075));

}

}