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jaindirectory

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✏️ Editing: qrbitstream.php

<?php

* PHP QR Code encoder

* Bitstream class

* Based on libqrencode C library distributed under LGPL 2.1

* PHP QR Code is distributed under LGPL 3

* This library is free software; you can redistribute it and/or

* modify it under the terms of the GNU Lesser General Public

* License as published by the Free Software Foundation; either

* version 3 of the License, or any later version.

* This library is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

* Lesser General Public License for more details.

* You should have received a copy of the GNU Lesser General Public

* License along with this library; if not, write to the Free Software

* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

class QRbitstream {

public $data = array();

//----------------------------------------------------------------------

public function size()

{

return count($this->data);

}

//----------------------------------------------------------------------

public function allocate($setLength)

{

$this->data = array_fill(0, $setLength, 0);

return 0;

}

//----------------------------------------------------------------------

public static function newFromNum($bits, $num)

{

$bstream = new QRbitstream();

$bstream->allocate($bits);

$mask = 1 << ($bits - 1);

for($i=0; $i<$bits; $i++) {

if($num & $mask) {

$bstream->data[$i] = 1;

} else {

$bstream->data[$i] = 0;

}

$mask = $mask >> 1;

}

return $bstream;

}

//----------------------------------------------------------------------

public static function newFromBytes($size, $data)

{

$bstream = new QRbitstream();

$bstream->allocate($size * 8);

$p=0;

for($i=0; $i<$size; $i++) {

$mask = 0x80;

for($j=0; $j<8; $j++) {

if($data[$i] & $mask) {

$bstream->data[$p] = 1;

} else {

$bstream->data[$p] = 0;

}

$p++;

$mask = $mask >> 1;

}

return $bstream;

}

//----------------------------------------------------------------------

public function append(QRbitstream $arg)

{

if (is_null($arg)) {

return -1;

}

if($arg->size() == 0) {

return 0;

}

if($this->size() == 0) {

$this->data = $arg->data;

return 0;

}

$this->data = array_values(array_merge($this->data, $arg->data));

return 0;

}

//----------------------------------------------------------------------

public function appendNum($bits, $num)

{

if ($bits == 0)

return 0;

$b = QRbitstream::newFromNum($bits, $num);

if(is_null($b))

return -1;

$ret = $this->append($b);

unset($b);

return $ret;

}

//----------------------------------------------------------------------

public function appendBytes($size, $data)

{

if ($size == 0)

return 0;

$b = QRbitstream::newFromBytes($size, $data);

if(is_null($b))

return -1;

$ret = $this->append($b);

unset($b);

return $ret;

}

//----------------------------------------------------------------------

public function toByte()

{

$size = $this->size();

if($size == 0) {

return array();

}

$data = array_fill(0, (int)(($size + 7) / 8), 0);

$bytes = (int)($size / 8);

$p = 0;

for($i=0; $i<$bytes; $i++) {

$v = 0;

for($j=0; $j<8; $j++) {

$v = $v << 1;

$v |= $this->data[$p];

$p++;

}

$data[$i] = $v;

}

if($size & 7) {

$v = 0;

for($j=0; $j<($size & 7); $j++) {

$v = $v << 1;

$v |= $this->data[$p];

$p++;

}

$data[$bytes] = $v;

}

return $data;

}

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