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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Pdf
* @subpackage FileParser
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: File.php 20096 2010-01-06 02:05:09Z bkarwin $
*/
/** Zend_Pdf_FileParserDataSource */
require_once 'Zend/Pdf/FileParserDataSource.php';
/**
* Concrete subclass of {@link Zend_Pdf_FileParserDataSource} that provides an
* interface to filesystem objects.
*
* Note that this class cannot be used for other sources that may be supported
* by {@link fopen()} (through URL wrappers). It may be used for local
* filesystem objects only.
*
* @package Zend_Pdf
* @subpackage FileParser
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Pdf_FileParserDataSource_File extends Zend_Pdf_FileParserDataSource
{
/**** Instance Variables ****/
/**
* Fully-qualified path to the file.
* @var string
*/
protected $_filePath = '';
/**
* File resource handle .
* @var resource
*/
protected $_fileResource = null;
/**** Public Interface ****/
/* Concrete Class Implementation */
/**
* Object constructor.
*
* Validates the path to the file, ensures that it is readable, then opens
* it for reading.
*
* Throws an exception if the file is missing or cannot be opened.
*
* @param string $filePath Fully-qualified path to the file.
* @throws Zend_Pdf_Exception
*/
public function __construct($filePath)
{
if (! (is_file($filePath) || is_link($filePath))) {
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception("Invalid file path: $filePath",
Zend_Pdf_Exception::BAD_FILE_PATH);
}
if (! is_readable($filePath)) {
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception("File is not readable: $filePath",
Zend_Pdf_Exception::NOT_READABLE);
}
if (($this->_size = @filesize($filePath)) === false) {
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception("Error while obtaining file size: $filePath",
Zend_Pdf_Exception::CANT_GET_FILE_SIZE);
}
if (($this->_fileResource = @fopen($filePath, 'rb')) === false) {
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception("Cannot open file for reading: $filePath",
Zend_Pdf_Exception::CANT_OPEN_FILE);
}
$this->_filePath = $filePath;
}
/**
* Object destructor.
*
* Closes the file if it had been successfully opened.
*/
public function __destruct()
{
if (is_resource($this->_fileResource)) {
@fclose($this->_fileResource);
}
}
/**
* Returns the specified number of raw bytes from the file at the byte
* offset of the current read position.
*
* Advances the read position by the number of bytes read.
*
* Throws an exception if an error was encountered while reading the file or
* if there is insufficient data to completely fulfill the request.
*
* @param integer $byteCount Number of bytes to read.
* @return string
* @throws Zend_Pdf_Exception
*/
public function readBytes($byteCount)
{
$bytes = @fread($this->_fileResource, $byteCount);
if ($bytes === false) {
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Unexpected error while reading file',
Zend_Pdf_Exception::ERROR_DURING_READ);
}
if (strlen($bytes) != $byteCount) {
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception("Insufficient data to read $byteCount bytes",
Zend_Pdf_Exception::INSUFFICIENT_DATA);
}
$this->_offset += $byteCount;
return $bytes;
}
/**
* Returns the entire contents of the file as a string.
*
* Preserves the current file seek position.
*
* @return string
*/
public function readAllBytes()
{
return file_get_contents($this->_filePath);
}
/* Object Magic Methods */
/**
* Returns the full filesystem path of the file.
*
* @return string
*/
public function __toString()
{
return $this->_filePath;
}
/* Primitive Methods */
/**
* Seeks the file read position to the specified byte offset.
*
* Throws an exception if the file pointer cannot be moved or if it is
* moved beyond EOF (end of file).
*
* @param integer $offset Destination byte offset.
* @throws Zend_Pdf_Exception
*/
public function moveToOffset($offset)
{
if ($this->_offset == $offset) {
return; // Not moving; do nothing.
}
parent::moveToOffset($offset);
$result = @fseek($this->_fileResource, $offset, SEEK_SET);
if ($result !== 0) {
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Error while setting new file position',
Zend_Pdf_Exception::CANT_SET_FILE_POSITION);
}
if (feof($this->_fileResource)) {
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Moved beyond the end of the file',
Zend_Pdf_Exception::MOVE_BEYOND_END_OF_FILE);
}
}
}
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