Raphaël G. Git Repositories - cdn/blob - vendor/phpqrcode/qrbitstream.php

   1 <?php
   2 /*
   3  * PHP QR Code encoder
   4  *
   5  * Bitstream class
   6  *
   7  * Based on libqrencode C library distributed under LGPL 2.1
   8  * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>
   9  *
  10  * PHP QR Code is distributed under LGPL 3
  11  * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
  12  *
  13  * This library is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU Lesser General Public
  15  * License as published by the Free Software Foundation; either
  16  * version 3 of the License, or any later version.
  17  *
  18  * This library is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  21  * Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public
  24  * License along with this library; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  26  */
  27
  28     class QRbitstream {
  29
  30         public $data = array();
  31
  32         //----------------------------------------------------------------------
  33         public function size()
  34         {
  35             return count($this->data);
  36         }
  37
  38         //----------------------------------------------------------------------
  39         public function allocate($setLength)
  40         {
  41             $this->data = array_fill(0, $setLength, 0);
  42             return 0;
  43         }
  44
  45         //----------------------------------------------------------------------
  46         public static function newFromNum($bits, $num)
  47         {
  48             $bstream = new QRbitstream();
  49             $bstream->allocate($bits);
  50
  51             $mask = 1 << ($bits - 1);
  52             for($i=0; $i<$bits; $i++) {
  53                 if($num & $mask) {
  54                     $bstream->data[$i] = 1;
  55                 } else {
  56                     $bstream->data[$i] = 0;
  57                 }
  58                 $mask = $mask >> 1;
  59             }
  60
  61             return $bstream;
  62         }
  63
  64         //----------------------------------------------------------------------
  65         public static function newFromBytes($size, $data)
  66         {
  67             $bstream = new QRbitstream();
  68             $bstream->allocate($size * 8);
  69             $p=0;
  70
  71             for($i=0; $i<$size; $i++) {
  72                 $mask = 0x80;
  73                 for($j=0; $j<8; $j++) {
  74                     if($data[$i] & $mask) {
  75                         $bstream->data[$p] = 1;
  76                     } else {
  77                         $bstream->data[$p] = 0;
  78                     }
  79                     $p++;
  80                     $mask = $mask >> 1;
  81                 }
  82             }
  83
  84             return $bstream;
  85         }
  86
  87         //----------------------------------------------------------------------
  88         public function append(QRbitstream $arg)
  89         {
  90             if (is_null($arg)) {
  91                 return -1;
  92             }
  93
  94             if($arg->size() == 0) {
  95                 return 0;
  96             }
  97
  98             if($this->size() == 0) {
  99                 $this->data = $arg->data;
 100                 return 0;
 101             }
 102
 103             $this->data = array_values(array_merge($this->data, $arg->data));
 104
 105             return 0;
 106         }
 107
 108         //----------------------------------------------------------------------
 109         public function appendNum($bits, $num)
 110         {
 111             if ($bits == 0)
 112                 return 0;
 113
 114             $b = QRbitstream::newFromNum($bits, $num);
 115
 116             if(is_null($b))
 117                 return -1;
 118
 119             $ret = $this->append($b);
 120             unset($b);
 121
 122             return $ret;
 123         }
 124
 125         //----------------------------------------------------------------------
 126         public function appendBytes($size, $data)
 127         {
 128             if ($size == 0)
 129                 return 0;
 130
 131             $b = QRbitstream::newFromBytes($size, $data);
 132
 133             if(is_null($b))
 134                 return -1;
 135
 136             $ret = $this->append($b);
 137             unset($b);
 138
 139             return $ret;
 140         }
 141
 142         //----------------------------------------------------------------------
 143         public function toByte()
 144         {
 145
 146             $size = $this->size();
 147
 148             if($size == 0) {
 149                 return array();
 150             }
 151
 152             $data = array_fill(0, (int)(($size + 7) / 8), 0);
 153             $bytes = (int)($size / 8);
 154
 155             $p = 0;
 156
 157             for($i=0; $i<$bytes; $i++) {
 158                 $v = 0;
 159                 for($j=0; $j<8; $j++) {
 160                     $v = $v << 1;
 161                     $v |= $this->data[$p];
 162                     $p++;
 163                 }
 164                 $data[$i] = $v;
 165             }
 166
 167             if($size & 7) {
 168                 $v = 0;
 169                 for($j=0; $j<($size & 7); $j++) {
 170                     $v = $v << 1;
 171                     $v |= $this->data[$p];
 172                     $p++;
 173                 }
 174                 $data[$bytes] = $v;
 175             }
 176
 177             return $data;
 178         }
 179
 180     }