76 lines
1.2 KiB
PHP
76 lines
1.2 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* Class BitBuffer
|
||
|
|
*
|
||
|
|
* @filesource BitBuffer.php
|
||
|
|
* @created 25.11.2015
|
||
|
|
* @package chillerlan\QRCode\Helpers
|
||
|
|
* @author Smiley <smiley@chillerlan.net>
|
||
|
|
* @copyright 2015 Smiley
|
||
|
|
* @license MIT
|
||
|
|
*/
|
||
|
|
|
||
|
|
namespace chillerlan\QRCode\Helpers;
|
||
|
|
|
||
|
|
use function count, floor;
|
||
|
|
|
||
|
|
class BitBuffer{
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var int[]
|
||
|
|
*/
|
||
|
|
public $buffer = [];
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var int
|
||
|
|
*/
|
||
|
|
public $length = 0;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return \chillerlan\QRCode\Helpers\BitBuffer
|
||
|
|
*/
|
||
|
|
public function clear():BitBuffer{
|
||
|
|
$this->buffer = [];
|
||
|
|
$this->length = 0;
|
||
|
|
|
||
|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param int $num
|
||
|
|
* @param int $length
|
||
|
|
*
|
||
|
|
* @return \chillerlan\QRCode\Helpers\BitBuffer
|
||
|
|
*/
|
||
|
|
public function put(int $num, int $length):BitBuffer{
|
||
|
|
|
||
|
|
for($i = 0; $i < $length; $i++){
|
||
|
|
$this->putBit((($num >> ($length - $i - 1)) & 1) === 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param bool $bit
|
||
|
|
*
|
||
|
|
* @return \chillerlan\QRCode\Helpers\BitBuffer
|
||
|
|
*/
|
||
|
|
public function putBit(bool $bit):BitBuffer{
|
||
|
|
$bufIndex = floor($this->length / 8);
|
||
|
|
|
||
|
|
if(count($this->buffer) <= $bufIndex){
|
||
|
|
$this->buffer[] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if($bit === true){
|
||
|
|
$this->buffer[(int)$bufIndex] |= (0x80 >> ($this->length % 8));
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->length++;
|
||
|
|
|
||
|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|