ru-se.com

Parser.php (7098B)

---

 <?php
 /**
  * SimplePie
  *
  * A PHP-Based RSS and Atom Feed Framework.
  * Takes the hard work out of managing a complete RSS/Atom solution.
  *
  * Copyright (c) 2004-2016, Ryan Parman, Sam 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
  * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
  * @author Ryan Parman
  * @author Sam 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;
 		}
 
 		$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;
 		}
 	}
 }