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<?php
/**
* This file is part of FPDI
*
* @package setasign\Fpdi
* @copyright Copyright (c) 2020 Setasign GmbH & Co. KG (https://www.setasign.com)
* @license http://opensource.org/licenses/mit-license The MIT License
*/
namespace setasign\Fpdi\PdfParser\Type;
use setasign\Fpdi\PdfParser\StreamReader;
/**
* Class representing a hexadecimal encoded PDF string object
*/
class PdfHexString extends PdfType
{
/**
* Parses a hexadecimal string object from the stream reader.
*
* @param StreamReader $streamReader
* @return bool|self
*/
public static function parse(StreamReader $streamReader)
{
$bufferOffset = $streamReader->getOffset();
while (true) {
$buffer = $streamReader->getBuffer(false);
$pos = \strpos($buffer, '>', $bufferOffset);
if ($pos === false) {
if (!$streamReader->increaseLength()) {
return false;
}
continue;
}
break;
}
$result = \substr($buffer, $bufferOffset, $pos - $bufferOffset);
$streamReader->setOffset($pos + 1);
$v = new self();
$v->value = $result;
return $v;
}
/**
* Helper method to create an instance.
*
* @param string $string The hex encoded string.
* @return self
*/
public static function create($string)
{
$v = new self();
$v->value = $string;
return $v;
}
/**
* Ensures that the passed value is a PdfHexString instance.
*
* @param mixed $hexString
* @return self
* @throws PdfTypeException
*/
public static function ensure($hexString)
{
return PdfType::ensureType(self::class, $hexString, 'Hex string value expected.');
}
}
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