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<?php
/*
* This file is part of the PHPASN1 library.
*
* Copyright © Friedrich Große <friedrich.grosse@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace FG\ASN1\Universal;
use FG\ASN1\ASNObject;
use FG\ASN1\Parsable;
use FG\ASN1\Identifier;
use FG\ASN1\Exception\ParserException;
class Boolean extends ASNObject implements Parsable
{
private $value;
/**
* @param bool $value
*/
public function __construct($value)
{
$this->value = $value;
}
public function getType()
{
return Identifier::BOOLEAN;
}
protected function calculateContentLength()
{
return 1;
}
protected function getEncodedValue()
{
if ($this->value == false) {
return chr(0x00);
} else {
return chr(0xFF);
}
}
public function getContent()
{
if ($this->value == true) {
return 'TRUE';
} else {
return 'FALSE';
}
}
public static function fromBinary(&$binaryData, &$offsetIndex = 0)
{
self::parseIdentifier($binaryData[$offsetIndex], Identifier::BOOLEAN, $offsetIndex++);
$contentLength = self::parseContentLength($binaryData, $offsetIndex);
if ($contentLength != 1) {
throw new ParserException("An ASN.1 Boolean should not have a length other than one. Extracted length was {$contentLength}", $offsetIndex);
}
$value = ord($binaryData[$offsetIndex++]);
$booleanValue = $value == 0xFF ? true : false;
$parsedObject = new self($booleanValue);
$parsedObject->setContentLength($contentLength);
return $parsedObject;
}
}
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