mirror of
https://github.com/wallabag/wallabag.git
synced 2024-11-28 03:51:02 +00:00
362 lines
7 KiB
PHP
362 lines
7 KiB
PHP
<?php
|
|
/**
|
|
* SimplePie
|
|
*
|
|
* A PHP-Based RSS and Atom Feed Framework.
|
|
* Takes the hard work out of managing a complete RSS/Atom solution.
|
|
*
|
|
* Copyright (c) 2004-2009, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification, are
|
|
* permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice, this list of
|
|
* conditions and the following disclaimer.
|
|
*
|
|
* * Redistributions in binary form must reproduce the above copyright notice, this list
|
|
* of conditions and the following disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* * Neither the name of the SimplePie Team nor the names of its contributors may be used
|
|
* to endorse or promote products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
|
|
* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* @package SimplePie
|
|
* @version 1.3-dev
|
|
* @copyright 2004-2010 Ryan Parman, Geoffrey Sneddon, Ryan McCue
|
|
* @author Ryan Parman
|
|
* @author Geoffrey Sneddon
|
|
* @author Ryan McCue
|
|
* @link http://simplepie.org/ SimplePie
|
|
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
|
|
* @todo phpDoc comments
|
|
*/
|
|
|
|
|
|
/**
|
|
* Parses the XML Declaration
|
|
*
|
|
* @package SimplePie
|
|
*/
|
|
class SimplePie_XML_Declaration_Parser
|
|
{
|
|
/**
|
|
* XML Version
|
|
*
|
|
* @access public
|
|
* @var string
|
|
*/
|
|
var $version = '1.0';
|
|
|
|
/**
|
|
* Encoding
|
|
*
|
|
* @access public
|
|
* @var string
|
|
*/
|
|
var $encoding = 'UTF-8';
|
|
|
|
/**
|
|
* Standalone
|
|
*
|
|
* @access public
|
|
* @var bool
|
|
*/
|
|
var $standalone = false;
|
|
|
|
/**
|
|
* Current state of the state machine
|
|
*
|
|
* @access private
|
|
* @var string
|
|
*/
|
|
var $state = 'before_version_name';
|
|
|
|
/**
|
|
* Input data
|
|
*
|
|
* @access private
|
|
* @var string
|
|
*/
|
|
var $data = '';
|
|
|
|
/**
|
|
* Input data length (to avoid calling strlen() everytime this is needed)
|
|
*
|
|
* @access private
|
|
* @var int
|
|
*/
|
|
var $data_length = 0;
|
|
|
|
/**
|
|
* Current position of the pointer
|
|
*
|
|
* @var int
|
|
* @access private
|
|
*/
|
|
var $position = 0;
|
|
|
|
/**
|
|
* Create an instance of the class with the input data
|
|
*
|
|
* @access public
|
|
* @param string $data Input data
|
|
*/
|
|
public function __construct($data)
|
|
{
|
|
$this->data = $data;
|
|
$this->data_length = strlen($this->data);
|
|
}
|
|
|
|
/**
|
|
* Parse the input data
|
|
*
|
|
* @access public
|
|
* @return bool true on success, false on failure
|
|
*/
|
|
public function parse()
|
|
{
|
|
while ($this->state && $this->state !== 'emit' && $this->has_data())
|
|
{
|
|
$state = $this->state;
|
|
$this->$state();
|
|
}
|
|
$this->data = '';
|
|
if ($this->state === 'emit')
|
|
{
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
$this->version = '';
|
|
$this->encoding = '';
|
|
$this->standalone = '';
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check whether there is data beyond the pointer
|
|
*
|
|
* @access private
|
|
* @return bool true if there is further data, false if not
|
|
*/
|
|
public function has_data()
|
|
{
|
|
return (bool) ($this->position < $this->data_length);
|
|
}
|
|
|
|
/**
|
|
* Advance past any whitespace
|
|
*
|
|
* @return int Number of whitespace characters passed
|
|
*/
|
|
public function skip_whitespace()
|
|
{
|
|
$whitespace = strspn($this->data, "\x09\x0A\x0D\x20", $this->position);
|
|
$this->position += $whitespace;
|
|
return $whitespace;
|
|
}
|
|
|
|
/**
|
|
* Read value
|
|
*/
|
|
public function get_value()
|
|
{
|
|
$quote = substr($this->data, $this->position, 1);
|
|
if ($quote === '"' || $quote === "'")
|
|
{
|
|
$this->position++;
|
|
$len = strcspn($this->data, $quote, $this->position);
|
|
if ($this->has_data())
|
|
{
|
|
$value = substr($this->data, $this->position, $len);
|
|
$this->position += $len + 1;
|
|
return $value;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public function before_version_name()
|
|
{
|
|
if ($this->skip_whitespace())
|
|
{
|
|
$this->state = 'version_name';
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
|
|
public function version_name()
|
|
{
|
|
if (substr($this->data, $this->position, 7) === 'version')
|
|
{
|
|
$this->position += 7;
|
|
$this->skip_whitespace();
|
|
$this->state = 'version_equals';
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
|
|
public function version_equals()
|
|
{
|
|
if (substr($this->data, $this->position, 1) === '=')
|
|
{
|
|
$this->position++;
|
|
$this->skip_whitespace();
|
|
$this->state = 'version_value';
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
|
|
public function version_value()
|
|
{
|
|
if ($this->version = $this->get_value())
|
|
{
|
|
$this->skip_whitespace();
|
|
if ($this->has_data())
|
|
{
|
|
$this->state = 'encoding_name';
|
|
}
|
|
else
|
|
{
|
|
$this->state = 'emit';
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
|
|
public function encoding_name()
|
|
{
|
|
if (substr($this->data, $this->position, 8) === 'encoding')
|
|
{
|
|
$this->position += 8;
|
|
$this->skip_whitespace();
|
|
$this->state = 'encoding_equals';
|
|
}
|
|
else
|
|
{
|
|
$this->state = 'standalone_name';
|
|
}
|
|
}
|
|
|
|
public function encoding_equals()
|
|
{
|
|
if (substr($this->data, $this->position, 1) === '=')
|
|
{
|
|
$this->position++;
|
|
$this->skip_whitespace();
|
|
$this->state = 'encoding_value';
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
|
|
public function encoding_value()
|
|
{
|
|
if ($this->encoding = $this->get_value())
|
|
{
|
|
$this->skip_whitespace();
|
|
if ($this->has_data())
|
|
{
|
|
$this->state = 'standalone_name';
|
|
}
|
|
else
|
|
{
|
|
$this->state = 'emit';
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
|
|
public function standalone_name()
|
|
{
|
|
if (substr($this->data, $this->position, 10) === 'standalone')
|
|
{
|
|
$this->position += 10;
|
|
$this->skip_whitespace();
|
|
$this->state = 'standalone_equals';
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
|
|
public function standalone_equals()
|
|
{
|
|
if (substr($this->data, $this->position, 1) === '=')
|
|
{
|
|
$this->position++;
|
|
$this->skip_whitespace();
|
|
$this->state = 'standalone_value';
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
|
|
public function standalone_value()
|
|
{
|
|
if ($standalone = $this->get_value())
|
|
{
|
|
switch ($standalone)
|
|
{
|
|
case 'yes':
|
|
$this->standalone = true;
|
|
break;
|
|
|
|
case 'no':
|
|
$this->standalone = false;
|
|
break;
|
|
|
|
default:
|
|
$this->state = false;
|
|
return;
|
|
}
|
|
|
|
$this->skip_whitespace();
|
|
if ($this->has_data())
|
|
{
|
|
$this->state = false;
|
|
}
|
|
else
|
|
{
|
|
$this->state = 'emit';
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$this->state = false;
|
|
}
|
|
}
|
|
}
|