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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to version 1.0 of the Zend Framework
* license, that is bundled with this package in the file LICENSE, and
* is available through the world-wide-web at the following URL:
* http://www.zend.com/license/framework/1_0.txt. If you did not receive
* a copy of the Zend Framework license and are unable to obtain it
* through the world-wide-web, please send a note to license@zend.com
* so we can mail you a copy immediately.
*
* @package Zend_Search_Lucene
* @subpackage Storage
* @copyright Copyright (c) 2005-2006 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://www.zend.com/license/framework/1_0.txt Zend Framework License version 1.0
*/
/** Zend_Search_Lucene_Storage_File */
require_once 'Zend/Search/Lucene/Storage/File.php';
/** Zend_Search_Lucene_Exception */
require_once 'Zend/Search/Lucene/Exception.php';
/**
* @package Zend_Search_Lucene
* @subpackage Storage
* @copyright Copyright (c) 2005-2006 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://www.zend.com/license/framework/1_0.txt Zend Framework License version 1.0
*
*/
class Zend_Search_Lucene_Storage_File_Filesystem extends Zend_Search_Lucene_Storage_File
{
/**
* Resource of the open file
*
* @var resource
*/
private $_fileHandle;
/**
* Class constructor. Open the file.
*
* @param string $filename
* @param string $mode
*/
public function __construct($filename, $mode='rb')
{
global $php_errormsg;
$trackErrors = ini_get( "track_errors");
ini_set('track_errors', '1');
$this->_fileHandle = @fopen($filename, $mode);
if ($this->_fileHandle===false) {
ini_set('track_errors', $trackErrors);
throw new Zend_Search_Lucene_Exception($php_errormsg);
}
ini_set('track_errors', $trackErrors);
}
/**
* Sets the file position indicator and advances the file pointer.
* The new position, measured in bytes from the beginning of the file,
* is obtained by adding offset to the position specified by whence,
* whose values are defined as follows:
* SEEK_SET - Set position equal to offset bytes.
* SEEK_CUR - Set position to current location plus offset.
* SEEK_END - Set position to end-of-file plus offset. (To move to
* a position before the end-of-file, you need to pass a negative value
* in offset.)
* Upon success, returns 0; otherwise, returns -1
*
* @param integer $offset
* @param integer $whence
* @return integer
*/
public function seek($offset, $whence=SEEK_SET)
{
return fseek($this->_fileHandle, $offset, $whence);
}
/**
* Get file position.
*
* @return integer
*/
public function tell()
{
return ftell($this->_fileHandle);
}
/**
* Close File object
*/
public function close()
{
if ($this->_fileHandle !== null ) {
@fclose($this->_fileHandle);
$this->_fileHandle = null;
}
}
/**
* Get the size of the already opened file
*
* @return integer
*/
public function size()
{
$position = ftell($this->_fileHandle);
fseek($this->_fileHandle, 0, SEEK_END);
$size = ftell($this->_fileHandle);
fseek($this->_fileHandle,$position);
return $size;
}
/**
* Read a $length bytes from the file and advance the file pointer.
*
* @param integer $length
* @return string
*/
protected function _fread($length=1)
{
if ($length == 0) {
return '';
}
if ($length < 1024) {
return fread($this->_fileHandle, $length);
}
$data = '';
while ( $length > 0 && ($nextBlock = fread($this->_fileHandle, $length)) != false ) {
$data .= $nextBlock;
$length -= strlen($nextBlock);
}
return $data;
}
/**
* Writes $length number of bytes (all, if $length===null) to the end
* of the file.
*
* @param string $data
* @param integer $length
*/
protected function _fwrite($data, $length=null)
{
if ($length === null ) {
fwrite($this->_fileHandle, $data);
} else {
fwrite($this->_fileHandle, $data, $length);
}
}
}
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