library/Zend/Gdata/MimeBodyString.php

   1 <?php
   2
   3 /**
   4  * Zend Framework
   5  *
   6  * LICENSE
   7  *
   8  * This source file is subject to the new BSD license that is bundled
   9  * with this package in the file LICENSE.txt.
  10  * It is also available through the world-wide-web at this URL:
  11  * http://framework.zend.com/license/new-bsd
  12  * If you did not receive a copy of the license and are unable to
  13  * obtain it through the world-wide-web, please send an email
  14  * to license@zend.com so we can send you a copy immediately.
  15  *
  16  * @category   Zend
  17  * @package    Zend_Gdata
  18  * @subpackage Gdata
  19  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  20  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  21  * @version    $Id$
  22  */
  23
  24 /**
  25  * A wrapper for strings for buffered reading.
  26  *
  27  * @category   Zend
  28  * @package    Zend_Gdata
  29  * @subpackage Gdata
  30  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  31  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  32  */
  33 class Zend_Gdata_MimeBodyString
  34 {
  35
  36     /**
  37      * The source string.
  38      *
  39      * @var string
  40      */
  41     protected $_sourceString = '';
  42
  43     /**
  44      * The size of the MIME message.
  45      * @var integer
  46      */
  47     protected $_bytesRead = 0;
  48
  49     /**
  50      * Create a new MimeBodyString object.
  51      *
  52      * @param string $sourceString The string we are wrapping.
  53      */
  54     public function __construct($sourceString)
  55     {
  56         $this->_sourceString = $sourceString;
  57         $this->_bytesRead = 0;
  58     }
  59
  60     /**
  61      * Read the next chunk of the string.
  62      *
  63      * @param integer $bytesRequested The size of the chunk that is to be read.
  64      * @return string A corresponding piece of the string.
  65      */
  66     public function read($bytesRequested)
  67     {
  68       $len = strlen($this->_sourceString);
  69       if($this->_bytesRead == $len) {
  70           return FALSE;
  71       } else if($bytesRequested > $len - $this->_bytesRead) {
  72           $bytesRequested = $len - $this->_bytesRead;
  73       }
  74
  75       $buffer = substr($this->_sourceString, $this->_bytesRead, $bytesRequested);
  76       $this->_bytesRead += $bytesRequested;
  77
  78       return $buffer;
  79     }
  80
  81     /**
  82      * The length of the string.
  83      *
  84      * @return int The length of the string contained in the object.
  85      */
  86     public function getSize()
  87     {
  88       return strlen($this->_sourceString);
  89     }
  90
  91
  92 }