[Sommaire] [Imprimer]

   1  <?php
   2  /**
   3   * Zend Framework
   4   *
   5   * LICENSE
   6   *
   7   * This source file is subject to version 1.0 of the Zend Framework
   8   * license, that is bundled with this package in the file LICENSE, and
   9   * is available through the world-wide-web at the following URL:
  10   * http://www.zend.com/license/framework/1_0.txt. If you did not receive
  11   * a copy of the Zend Framework license and are unable to obtain it
  12   * through the world-wide-web, please send a note to license@zend.com
  13   * so we can mail you a copy immediately.
  14   *
  15   * @package    Zend_Search_Lucene
  16   * @subpackage Storage
  17   * @copyright  Copyright (c) 2005-2006 Zend Technologies USA Inc. (http://www.zend.com)
  18   * @license    http://www.zend.com/license/framework/1_0.txt Zend Framework License version 1.0
  19   */
  20  
  21  
  22  /** Zend_Search_Lucene_Storage_File */
  23  require_once 'Zend/Search/Lucene/Storage/File.php';
  24  
  25  /** Zend_Search_Lucene_Exception */
  26  require_once 'Zend/Search/Lucene/Exception.php';
  27  
  28  
  29  /**
  30   * @package    Zend_Search_Lucene
  31   * @subpackage Storage
  32   * @copyright  Copyright (c) 2005-2006 Zend Technologies USA Inc. (http://www.zend.com)
  33   * @license    http://www.zend.com/license/framework/1_0.txt Zend Framework License version 1.0
  34   *
  35   */
  36  class Zend_Search_Lucene_Storage_File_Filesystem extends Zend_Search_Lucene_Storage_File
  37  {
  38      /**
  39       * Resource of the open file
  40       *
  41       * @var resource
  42       */
  43      private $_fileHandle;
  44  
  45  
  46      /**
  47       * Class constructor.  Open the file.
  48       *
  49       * @param string $filename
  50       * @param string $mode
  51       */
  52      public function __construct($filename, $mode='rb')
  53      {
  54          global $php_errormsg;
  55  
  56          $trackErrors = ini_get( "track_errors");
  57          ini_set('track_errors', '1');
  58  
  59          $this->_fileHandle = @fopen($filename, $mode);
  60  
  61          if ($this->_fileHandle===false) {
  62              ini_set('track_errors', $trackErrors);
  63              throw new Zend_Search_Lucene_Exception($php_errormsg);
  64          }
  65  
  66          ini_set('track_errors', $trackErrors);
  67      }
  68  
  69  
  70      /**
  71       * Sets the file position indicator and advances the file pointer.
  72       * The new position, measured in bytes from the beginning of the file,
  73       * is obtained by adding offset to the position specified by whence,
  74       * whose values are defined as follows:
  75       * SEEK_SET - Set position equal to offset bytes.
  76       * SEEK_CUR - Set position to current location plus offset.
  77       * SEEK_END - Set position to end-of-file plus offset. (To move to
  78       * a position before the end-of-file, you need to pass a negative value
  79       * in offset.)
  80       * Upon success, returns 0; otherwise, returns -1
  81       *
  82       * @param integer $offset
  83       * @param integer $whence
  84       * @return integer
  85       */
  86      public function seek($offset, $whence=SEEK_SET)
  87      {
  88          return fseek($this->_fileHandle, $offset, $whence);
  89      }
  90  
  91  
  92      /**
  93       * Get file position.
  94       *
  95       * @return integer
  96       */
  97      public function tell()
  98      {
  99          return ftell($this->_fileHandle);
 100      }
 101  
 102  
 103      /**
 104       * Close File object
 105       */
 106      public function close()
 107      {
 108          if ($this->_fileHandle !== null ) {
 109              @fclose($this->_fileHandle);
 110              $this->_fileHandle = null;
 111          }
 112      }
 113  
 114      /**
 115       * Get the size of the already opened file
 116       *
 117       * @return integer
 118       */
 119      public function size()
 120      {
 121          $position = ftell($this->_fileHandle);
 122          fseek($this->_fileHandle, 0, SEEK_END);
 123          $size = ftell($this->_fileHandle);
 124          fseek($this->_fileHandle,$position);
 125  
 126          return $size;
 127      }
 128  
 129      /**
 130       * Read a $length bytes from the file and advance the file pointer.
 131       *
 132       * @param integer $length
 133       * @return string
 134       */
 135      protected function _fread($length=1)
 136      {
 137          if ($length == 0) {
 138              return '';
 139          }
 140  
 141          if ($length < 1024) {
 142              return fread($this->_fileHandle, $length);
 143          }
 144  
 145          $data = '';
 146          while ( $length > 0 && ($nextBlock = fread($this->_fileHandle, $length)) != false ) {
 147              $data .= $nextBlock;
 148              $length -= strlen($nextBlock);
 149          }
 150          return $data;
 151      }
 152  
 153  
 154      /**
 155       * Writes $length number of bytes (all, if $length===null) to the end
 156       * of the file.
 157       *
 158       * @param string $data
 159       * @param integer $length
 160       */
 161      protected function _fwrite($data, $length=null)
 162      {
 163          if ($length === null ) {
 164              fwrite($this->_fileHandle, $data);
 165          } else {
 166              fwrite($this->_fileHandle, $data, $length);
 167          }
 168      }
 169  }
 170