* * PHP QR Code is distributed under LGPL 3 * Copyright (C) 2010 Dominik Dzienia * * 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; } }