WordPress/wp-includes/SimplePie/XML/Declaration/Parser.php
Andrew Nacin 405a995659 Update to SimplePie 1.3. props rmccue.
Uses individual files for each class. We now conditionally load only the pieces
we need, resulting in less memory usage. Also easier to maintain now that it is
not a single 387KB file.

fixes #21183.



git-svn-id: http://core.svn.wordpress.org/trunk@21644 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2012-08-28 17:24:33 +00:00

363 lines
7.0 KiB
PHP
Executable File

<?php
/**
* SimplePie
*
* A PHP-Based RSS and Atom Feed Framework.
* Takes the hard work out of managing a complete RSS/Atom solution.
*
* Copyright (c) 2004-2012, 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
* @copyright 2004-2012 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
*/
/**
* Parses the XML Declaration
*
* @package SimplePie
* @subpackage Parsing
*/
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;
}
}
}