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