180 righe
5,3 KiB
PHP
180 righe
5,3 KiB
PHP
<?php
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/*
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* PHP QR Code encoder
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*
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* Bitstream class
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*
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* Based on libqrencode C library distributed under LGPL 2.1
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* Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>
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*
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* PHP QR Code is distributed under LGPL 3
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* Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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class QRbitstream {
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public $data = array();
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//----------------------------------------------------------------------
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public function size()
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{
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return count($this->data);
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}
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//----------------------------------------------------------------------
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public function allocate($setLength)
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{
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$this->data = array_fill(0, $setLength, 0);
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return 0;
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}
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//----------------------------------------------------------------------
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public static function newFromNum($bits, $num)
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{
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$bstream = new QRbitstream();
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$bstream->allocate($bits);
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$mask = 1 << ($bits - 1);
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for($i=0; $i<$bits; $i++) {
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if($num & $mask) {
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$bstream->data[$i] = 1;
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} else {
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$bstream->data[$i] = 0;
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}
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$mask = $mask >> 1;
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}
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return $bstream;
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}
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//----------------------------------------------------------------------
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public static function newFromBytes($size, $data)
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{
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$bstream = new QRbitstream();
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$bstream->allocate($size * 8);
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$p=0;
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for($i=0; $i<$size; $i++) {
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$mask = 0x80;
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for($j=0; $j<8; $j++) {
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if($data[$i] & $mask) {
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$bstream->data[$p] = 1;
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} else {
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$bstream->data[$p] = 0;
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}
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$p++;
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$mask = $mask >> 1;
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}
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}
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return $bstream;
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}
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//----------------------------------------------------------------------
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public function append(QRbitstream $arg)
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{
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if (is_null($arg)) {
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return -1;
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}
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if($arg->size() == 0) {
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return 0;
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}
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if($this->size() == 0) {
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$this->data = $arg->data;
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return 0;
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}
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$this->data = array_values(array_merge($this->data, $arg->data));
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return 0;
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}
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//----------------------------------------------------------------------
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public function appendNum($bits, $num)
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{
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if ($bits == 0)
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return 0;
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$b = QRbitstream::newFromNum($bits, $num);
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if(is_null($b))
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return -1;
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$ret = $this->append($b);
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unset($b);
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return $ret;
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}
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//----------------------------------------------------------------------
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public function appendBytes($size, $data)
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{
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if ($size == 0)
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return 0;
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$b = QRbitstream::newFromBytes($size, $data);
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if(is_null($b))
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return -1;
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$ret = $this->append($b);
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unset($b);
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return $ret;
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}
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//----------------------------------------------------------------------
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public function toByte()
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{
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$size = $this->size();
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if($size == 0) {
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return array();
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}
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$data = array_fill(0, (int)(($size + 7) / 8), 0);
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$bytes = (int)($size / 8);
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$p = 0;
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for($i=0; $i<$bytes; $i++) {
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$v = 0;
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for($j=0; $j<8; $j++) {
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$v = $v << 1;
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$v |= $this->data[$p];
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$p++;
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}
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$data[$i] = $v;
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}
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if($size & 7) {
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$v = 0;
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for($j=0; $j<($size & 7); $j++) {
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$v = $v << 1;
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$v |= $this->data[$p];
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$p++;
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}
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$data[$bytes] = $v;
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}
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return $data;
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}
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}
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