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File: phpqrcode/qrbitstream.php

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  Classes of Karl Holz  >  Gig Cable Label  >  phpqrcode/qrbitstream.php  >  Download  
File: phpqrcode/qrbitstream.php
Role: Example script
Content type: text/plain
Description: phpqrcode files needed by class for QR codes
Class: Gig Cable Label
Generate label images in resistors code colours
Author: By
Last change:
Date: 3 years ago
Size: 5,386 bytes
 

Contents

Class file image Download
<?php
/*
 * PHP QR Code encoder
 *
 * Bitstream class
 *
 * Based on libqrencode C library distributed under LGPL 2.1
 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>
 *
 * PHP QR Code is distributed under LGPL 3
 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
 *
 * 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;
        }

    }