mirror of https://tt-rss.org/git/tt-rss.git
90 lines
1.4 KiB
PHP
90 lines
1.4 KiB
PHP
<?php
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/**
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* Class BitBuffer
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*
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* @filesource BitBuffer.php
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* @created 25.11.2015
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* @package chillerlan\QRCode\Helpers
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* @author Smiley <smiley@chillerlan.net>
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* @copyright 2015 Smiley
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* @license MIT
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*/
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namespace chillerlan\QRCode\Helpers;
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use function count, floor;
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/**
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* Holds the raw binary data
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*/
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final class BitBuffer{
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/**
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* The buffer content
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*
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* @var int[]
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*/
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protected array $buffer = [];
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/**
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* Length of the content (bits)
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*/
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protected int $length = 0;
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/**
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* clears the buffer
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*/
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public function clear():BitBuffer{
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$this->buffer = [];
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$this->length = 0;
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return $this;
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}
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/**
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* appends a sequence of bits
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*/
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public function put(int $num, int $length):BitBuffer{
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for($i = 0; $i < $length; $i++){
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$this->putBit((($num >> ($length - $i - 1)) & 1) === 1);
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}
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return $this;
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}
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/**
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* appends a single bit
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*/
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public function putBit(bool $bit):BitBuffer{
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$bufIndex = floor($this->length / 8);
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if(count($this->buffer) <= $bufIndex){
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$this->buffer[] = 0;
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}
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if($bit === true){
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$this->buffer[(int)$bufIndex] |= (0x80 >> ($this->length % 8));
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}
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$this->length++;
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return $this;
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}
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/**
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* returns the current buffer length
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*/
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public function getLength():int{
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return $this->length;
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}
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/**
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* returns the buffer content
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*/
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public function getBuffer():array{
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return $this->buffer;
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}
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}
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