diff -r 000000000000 -r 03b0d1493584 web/wp-includes/rewrite.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/wp-includes/rewrite.php	Wed Dec 23 17:55:33 2009 +0000
@@ -0,0 +1,1946 @@
+<?php
+/**
+ * WordPress Rewrite API
+ *
+ * @package WordPress
+ * @subpackage Rewrite
+ */
+
+/**
+ * Add a straight rewrite rule.
+ *
+ * @see WP_Rewrite::add_rule() for long description.
+ * @since 2.1.0
+ *
+ * @param string $regex Regular Expression to match request against.
+ * @param string $redirect Page to redirect to.
+ * @param string $after Optional, default is 'bottom'. Where to add rule, can also be 'top'.
+ */
+function add_rewrite_rule($regex, $redirect, $after = 'bottom') {
+	global $wp_rewrite;
+	$wp_rewrite->add_rule($regex, $redirect, $after);
+}
+
+/**
+ * Add a new tag (like %postname%).
+ *
+ * Warning: you must call this on init or earlier, otherwise the query var
+ * addition stuff won't work.
+ *
+ * @since 2.1.0
+ *
+ * @param string $tagname
+ * @param string $regex
+ */
+function add_rewrite_tag($tagname, $regex) {
+	//validation
+	if (strlen($tagname) < 3 || $tagname{0} != '%' || $tagname{strlen($tagname)-1} != '%') {
+		return;
+	}
+
+	$qv = trim($tagname, '%');
+
+	global $wp_rewrite, $wp;
+	$wp->add_query_var($qv);
+	$wp_rewrite->add_rewrite_tag($tagname, $regex, $qv . '=');
+}
+
+/**
+ * Add a new feed type like /atom1/.
+ *
+ * @since 2.1.0
+ *
+ * @param string $feedname
+ * @param callback $function Callback to run on feed display.
+ * @return string Feed action name.
+ */
+function add_feed($feedname, $function) {
+	global $wp_rewrite;
+	if (!in_array($feedname, $wp_rewrite->feeds)) { //override the file if it is
+		$wp_rewrite->feeds[] = $feedname;
+	}
+	$hook = 'do_feed_' . $feedname;
+	// Remove default function hook
+	remove_action($hook, $hook, 10, 1);
+	add_action($hook, $function, 10, 1);
+	return $hook;
+}
+
+/**
+ * Endpoint Mask for Permalink.
+ *
+ * @since 2.1.0
+ */
+define('EP_PERMALINK', 1);
+
+/**
+ * Endpoint Mask for Attachment.
+ *
+ * @since 2.1.0
+ */
+define('EP_ATTACHMENT', 2);
+
+/**
+ * Endpoint Mask for date.
+ *
+ * @since 2.1.0
+ */
+define('EP_DATE', 4);
+
+/**
+ * Endpoint Mask for year
+ *
+ * @since 2.1.0
+ */
+define('EP_YEAR', 8);
+
+/**
+ * Endpoint Mask for month.
+ *
+ * @since 2.1.0
+ */
+define('EP_MONTH', 16);
+
+/**
+ * Endpoint Mask for day.
+ *
+ * @since 2.1.0
+ */
+define('EP_DAY', 32);
+
+/**
+ * Endpoint Mask for root.
+ *
+ * @since 2.1.0
+ */
+define('EP_ROOT', 64);
+
+/**
+ * Endpoint Mask for comments.
+ *
+ * @since 2.1.0
+ */
+define('EP_COMMENTS', 128);
+
+/**
+ * Endpoint Mask for searches.
+ *
+ * @since 2.1.0
+ */
+define('EP_SEARCH', 256);
+
+/**
+ * Endpoint Mask for categories.
+ *
+ * @since 2.1.0
+ */
+define('EP_CATEGORIES', 512);
+
+/**
+ * Endpoint Mask for tags.
+ *
+ * @since 2.3.0
+ */
+define('EP_TAGS', 1024);
+
+/**
+ * Endpoint Mask for authors.
+ *
+ * @since 2.1.0
+ */
+define('EP_AUTHORS', 2048);
+
+/**
+ * Endpoint Mask for pages.
+ *
+ * @since 2.1.0
+ */
+define('EP_PAGES', 4096);
+
+//pseudo-places
+/**
+ * Endpoint Mask for default, which is nothing.
+ *
+ * @since 2.1.0
+ */
+define('EP_NONE', 0);
+
+/**
+ * Endpoint Mask for everything.
+ *
+ * @since 2.1.0
+ */
+define('EP_ALL', 8191);
+
+/**
+ * Add an endpoint, like /trackback/.
+ *
+ * The endpoints are added to the end of the request. So a request matching
+ * "/2008/10/14/my_post/myep/", the endpoint will be "/myep/".
+ *
+ * Be sure to flush the rewrite rules (wp_rewrite->flush()) when your plugin gets
+ * activated (register_activation_hook()) and deactivated (register_deactivation_hook())
+ *
+ * @since 2.1.0
+ * @see WP_Rewrite::add_endpoint() Parameters and more description.
+ * @uses $wp_rewrite
+ *
+ * @param unknown_type $name
+ * @param unknown_type $places
+ */
+function add_rewrite_endpoint($name, $places) {
+	global $wp_rewrite;
+	$wp_rewrite->add_endpoint($name, $places);
+}
+
+/**
+ * Filter the URL base for taxonomies.
+ *
+ * To remove any manually prepended /index.php/.
+ *
+ * @access private
+ * @since 2.6.0
+ * @author Mark Jaquith
+ *
+ * @param string $base The taxonomy base that we're going to filter
+ * @return string
+ */
+function _wp_filter_taxonomy_base( $base ) {
+	if ( !empty( $base ) ) {
+		$base = preg_replace( '|^/index\.php/|', '', $base );
+		$base = trim( $base, '/' );
+	}
+	return $base;
+}
+
+/**
+ * Examine a url and try to determine the post ID it represents.
+ *
+ * Checks are supposedly from the hosted site blog.
+ *
+ * @since 1.0.0
+ *
+ * @param string $url Permalink to check.
+ * @return int Post ID, or 0 on failure.
+ */
+function url_to_postid($url) {
+	global $wp_rewrite;
+
+	$url = apply_filters('url_to_postid', $url);
+
+	// First, check to see if there is a 'p=N' or 'page_id=N' to match against
+	if ( preg_match('#[?&](p|page_id|attachment_id)=(\d+)#', $url, $values) )	{
+		$id = absint($values[2]);
+		if ($id)
+			return $id;
+	}
+
+	// Check to see if we are using rewrite rules
+	$rewrite = $wp_rewrite->wp_rewrite_rules();
+
+	// Not using rewrite rules, and 'p=N' and 'page_id=N' methods failed, so we're out of options
+	if ( empty($rewrite) )
+		return 0;
+
+	// $url cleanup by Mark Jaquith
+	// This fixes things like #anchors, ?query=strings, missing 'www.',
+	// added 'www.', or added 'index.php/' that will mess up our WP_Query
+	// and return a false negative
+
+	// Get rid of the #anchor
+	$url_split = explode('#', $url);
+	$url = $url_split[0];
+
+	// Get rid of URL ?query=string
+	$url_split = explode('?', $url);
+	$url = $url_split[0];
+
+	// Add 'www.' if it is absent and should be there
+	if ( false !== strpos(get_option('home'), '://www.') && false === strpos($url, '://www.') )
+		$url = str_replace('://', '://www.', $url);
+
+	// Strip 'www.' if it is present and shouldn't be
+	if ( false === strpos(get_option('home'), '://www.') )
+		$url = str_replace('://www.', '://', $url);
+
+	// Strip 'index.php/' if we're not using path info permalinks
+	if ( !$wp_rewrite->using_index_permalinks() )
+		$url = str_replace('index.php/', '', $url);
+
+	if ( false !== strpos($url, get_option('home')) ) {
+		// Chop off http://domain.com
+		$url = str_replace(get_option('home'), '', $url);
+	} else {
+		// Chop off /path/to/blog
+		$home_path = parse_url(get_option('home'));
+		$home_path = $home_path['path'];
+		$url = str_replace($home_path, '', $url);
+	}
+
+	// Trim leading and lagging slashes
+	$url = trim($url, '/');
+
+	$request = $url;
+
+	// Done with cleanup
+
+	// Look for matches.
+	$request_match = $request;
+	foreach ($rewrite as $match => $query) {
+		// If the requesting file is the anchor of the match, prepend it
+		// to the path info.
+		if ( (! empty($url)) && (strpos($match, $url) === 0) && ($url != $request)) {
+			$request_match = $url . '/' . $request;
+		}
+
+		if ( preg_match("!^$match!", $request_match, $matches) ) {
+			// Got a match.
+			// Trim the query of everything up to the '?'.
+			$query = preg_replace("!^.+\?!", '', $query);
+
+			// Substitute the substring matches into the query.
+			$query = addslashes(WP_MatchesMapRegex::apply($query, $matches));
+			// Filter out non-public query vars
+			global $wp;
+			parse_str($query, $query_vars);
+			$query = array();
+			foreach ( (array) $query_vars as $key => $value ) {
+				if ( in_array($key, $wp->public_query_vars) )
+					$query[$key] = $value;
+			}
+			// Do the query
+			$query = new WP_Query($query);
+			if ( $query->is_single || $query->is_page )
+				return $query->post->ID;
+			else
+				return 0;
+		}
+	}
+	return 0;
+}
+
+/**
+ * WordPress Rewrite Component.
+ *
+ * The WordPress Rewrite class writes the rewrite module rules to the .htaccess
+ * file. It also handles parsing the request to get the correct setup for the
+ * WordPress Query class.
+ *
+ * The Rewrite along with WP class function as a front controller for WordPress.
+ * You can add rules to trigger your page view and processing using this
+ * component. The full functionality of a front controller does not exist,
+ * meaning you can't define how the template files load based on the rewrite
+ * rules.
+ *
+ * @since 1.5.0
+ */
+class WP_Rewrite {
+	/**
+	 * Default permalink structure for WordPress.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $permalink_structure;
+
+	/**
+	 * Whether to add trailing slashes.
+	 *
+	 * @since 2.2.0
+	 * @access private
+	 * @var bool
+	 */
+	var $use_trailing_slashes;
+
+	/**
+	 * Customized or default category permalink base ( example.com/xx/tagname ).
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $category_base;
+
+	/**
+	 * Customized or default tag permalink base ( example.com/xx/tagname ).
+	 *
+	 * @since 2.3.0
+	 * @access private
+	 * @var string
+	 */
+	var $tag_base;
+
+	/**
+	 * Permalink request structure for categories.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $category_structure;
+
+	/**
+	 * Permalink request structure for tags.
+	 *
+	 * @since 2.3.0
+	 * @access private
+	 * @var string
+	 */
+	var $tag_structure;
+
+	/**
+	 * Permalink author request base ( example.com/author/authorname ).
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $author_base = 'author';
+
+	/**
+	 * Permalink request structure for author pages.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $author_structure;
+
+	/**
+	 * Permalink request structure for dates.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $date_structure;
+
+	/**
+	 * Permalink request structure for pages.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $page_structure;
+
+	/**
+	 * Search permalink base ( example.com/search/query ).
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $search_base = 'search';
+
+	/**
+	 * Permalink request structure for searches.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $search_structure;
+
+	/**
+	 * Comments permalink base.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $comments_base = 'comments';
+
+	/**
+	 * Feed permalink base.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $feed_base = 'feed';
+
+	/**
+	 * Comments feed request structure permalink.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $comments_feed_structure;
+
+	/**
+	 * Feed request structure permalink.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $feed_structure;
+
+	/**
+	 * Front URL path.
+	 *
+	 * The difference between the root property is that WordPress might be
+	 * located at example/WordPress/index.php, if permalinks are turned off. The
+	 * WordPress/index.php will be the front portion. If permalinks are turned
+	 * on, this will most likely be empty or not set.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $front;
+
+	/**
+	 * Root URL path to WordPress (without domain).
+	 *
+	 * The difference between front property is that WordPress might be located
+	 * at example.com/WordPress/. The root is the 'WordPress/' portion.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $root = '';
+
+	/**
+	 * Permalink to the home page.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 * @var string
+	 */
+	var $index = 'index.php';
+
+	/**
+	 * Request match string.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var string
+	 */
+	var $matches = '';
+
+	/**
+	 * Rewrite rules to match against the request to find the redirect or query.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var array
+	 */
+	var $rules;
+
+	/**
+	 * Additional rules added external to the rewrite class.
+	 *
+	 * Those not generated by the class, see add_rewrite_rule().
+	 *
+	 * @since 2.1.0
+	 * @access private
+	 * @var array
+	 */
+	var $extra_rules = array(); //
+
+	/**
+	 * Additional rules that belong at the beginning to match first.
+	 *
+	 * Those not generated by the class, see add_rewrite_rule().
+	 *
+	 * @since 2.3.0
+	 * @access private
+	 * @var array
+	 */
+	var $extra_rules_top = array(); //
+
+	/**
+	 * Rules that don't redirect to WP's index.php.
+	 *
+	 * These rules are written to the mod_rewrite portion of the .htaccess.
+	 *
+	 * @since 2.1.0
+	 * @access private
+	 * @var array
+	 */
+	var $non_wp_rules = array(); //
+
+	/**
+	 * Extra permalink structures.
+	 *
+	 * @since 2.1.0
+	 * @access private
+	 * @var array
+	 */
+	var $extra_permastructs = array();
+
+	/**
+	 * Endpoints permalinks
+	 *
+	 * @since unknown
+	 * @access private
+	 * @var array
+	 */
+	var $endpoints;
+
+	/**
+	 * Whether to write every mod_rewrite rule for WordPress.
+	 *
+	 * This is off by default, turning it on might print a lot of rewrite rules
+	 * to the .htaccess file.
+	 *
+	 * @since 2.0.0
+	 * @access public
+	 * @var bool
+	 */
+	var $use_verbose_rules = false;
+
+	/**
+	 * Whether to write every mod_rewrite rule for WordPress pages.
+	 *
+	 * @since 2.5.0
+	 * @access public
+	 * @var bool
+	 */
+	var $use_verbose_page_rules = true;
+
+	/**
+	 * Permalink structure search for preg_replace.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var array
+	 */
+	var $rewritecode =
+		array(
+					'%year%',
+					'%monthnum%',
+					'%day%',
+					'%hour%',
+					'%minute%',
+					'%second%',
+					'%postname%',
+					'%post_id%',
+					'%category%',
+					'%tag%',
+					'%author%',
+					'%pagename%',
+					'%search%'
+					);
+
+	/**
+	 * Preg_replace values for the search, see {@link WP_Rewrite::$rewritecode}.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var array
+	 */
+	var $rewritereplace =
+		array(
+					'([0-9]{4})',
+					'([0-9]{1,2})',
+					'([0-9]{1,2})',
+					'([0-9]{1,2})',
+					'([0-9]{1,2})',
+					'([0-9]{1,2})',
+					'([^/]+)',
+					'([0-9]+)',
+					'(.+?)',
+					'(.+?)',
+					'([^/]+)',
+					'([^/]+?)',
+					'(.+)'
+					);
+
+	/**
+	 * Search for the query to look for replacing.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var array
+	 */
+	var $queryreplace =
+		array (
+					'year=',
+					'monthnum=',
+					'day=',
+					'hour=',
+					'minute=',
+					'second=',
+					'name=',
+					'p=',
+					'category_name=',
+					'tag=',
+					'author_name=',
+					'pagename=',
+					's='
+					);
+
+	/**
+	 * Supported default feeds.
+	 *
+	 * @since 1.5.0
+	 * @access private
+	 * @var array
+	 */
+	var $feeds = array ( 'feed', 'rdf', 'rss', 'rss2', 'atom' );
+
+	/**
+	 * Whether permalinks are being used.
+	 *
+	 * This can be either rewrite module or permalink in the HTTP query string.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return bool True, if permalinks are enabled.
+	 */
+	function using_permalinks() {
+		if (empty($this->permalink_structure))
+			return false;
+		else
+			return true;
+	}
+
+	/**
+	 * Whether permalinks are being used and rewrite module is not enabled.
+	 *
+	 * Means that permalink links are enabled and index.php is in the URL.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return bool
+	 */
+	function using_index_permalinks() {
+		if (empty($this->permalink_structure)) {
+			return false;
+		}
+
+		// If the index is not in the permalink, we're using mod_rewrite.
+		if (preg_match('#^/*' . $this->index . '#', $this->permalink_structure)) {
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Whether permalinks are being used and rewrite module is enabled.
+	 *
+	 * Using permalinks and index.php is not in the URL.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return bool
+	 */
+	function using_mod_rewrite_permalinks() {
+		if ( $this->using_permalinks() && ! $this->using_index_permalinks())
+			return true;
+		else
+			return false;
+	}
+
+	/**
+	 * Index for matches for usage in preg_*() functions.
+	 *
+	 * The format of the string is, with empty matches property value, '$NUM'.
+	 * The 'NUM' will be replaced with the value in the $number parameter. With
+	 * the matches property not empty, the value of the returned string will
+	 * contain that value of the matches property. The format then will be
+	 * '$MATCHES[NUM]', with MATCHES as the value in the property and NUM the
+	 * value of the $number parameter.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @param int $number Index number.
+	 * @return string
+	 */
+	function preg_index($number) {
+		$match_prefix = '$';
+		$match_suffix = '';
+
+		if ( ! empty($this->matches) ) {
+			$match_prefix = '$' . $this->matches . '[';
+			$match_suffix = ']';
+		}
+
+		return "$match_prefix$number$match_suffix";
+	}
+
+	/**
+	 * Retrieve all page and attachments for pages URIs.
+	 *
+	 * The attachments are for those that have pages as parents and will be
+	 * retrieved.
+	 *
+	 * @since 2.5.0
+	 * @access public
+	 *
+	 * @return array Array of page URIs as first element and attachment URIs as second element.
+	 */
+	function page_uri_index() {
+		global $wpdb;
+
+		//get pages in order of hierarchy, i.e. children after parents
+		$posts = get_page_hierarchy($wpdb->get_results("SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_type = 'page'"));
+		//now reverse it, because we need parents after children for rewrite rules to work properly
+		$posts = array_reverse($posts, true);
+
+		$page_uris = array();
+		$page_attachment_uris = array();
+
+		if ( !$posts )
+			return array( array(), array() );
+
+		foreach ($posts as $id => $post) {
+			// URL => page name
+			$uri = get_page_uri($id);
+			$attachments = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_type = 'attachment' AND post_parent = %d", $id ));
+			if ( $attachments ) {
+				foreach ( $attachments as $attachment ) {
+					$attach_uri = get_page_uri($attachment->ID);
+					$page_attachment_uris[$attach_uri] = $attachment->ID;
+				}
+			}
+
+			$page_uris[$uri] = $id;
+		}
+
+		return array( $page_uris, $page_attachment_uris );
+	}
+
+	/**
+	 * Retrieve all of the rewrite rules for pages.
+	 *
+	 * If the 'use_verbose_page_rules' property is false, then there will only
+	 * be a single rewrite rule for pages for those matching '%pagename%'. With
+	 * the property set to true, the attachments and the pages will be added for
+	 * each individual attachment URI and page URI, respectively.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return array
+	 */
+	function page_rewrite_rules() {
+		$rewrite_rules = array();
+		$page_structure = $this->get_page_permastruct();
+
+		if ( ! $this->use_verbose_page_rules ) {
+			$this->add_rewrite_tag('%pagename%', "(.+?)", 'pagename=');
+			$rewrite_rules = array_merge($rewrite_rules, $this->generate_rewrite_rules($page_structure, EP_PAGES));
+			return $rewrite_rules;
+		}
+
+		$page_uris = $this->page_uri_index();
+		$uris = $page_uris[0];
+		$attachment_uris = $page_uris[1];
+
+		if( is_array( $attachment_uris ) ) {
+			foreach ($attachment_uris as $uri => $pagename) {
+				$this->add_rewrite_tag('%pagename%', "($uri)", 'attachment=');
+				$rewrite_rules = array_merge($rewrite_rules, $this->generate_rewrite_rules($page_structure, EP_PAGES));
+			}
+		}
+		if( is_array( $uris ) ) {
+			foreach ($uris as $uri => $pagename) {
+				$this->add_rewrite_tag('%pagename%', "($uri)", 'pagename=');
+				$rewrite_rules = array_merge($rewrite_rules, $this->generate_rewrite_rules($page_structure, EP_PAGES));
+			}
+		}
+
+		return $rewrite_rules;
+	}
+
+	/**
+	 * Retrieve date permalink structure, with year, month, and day.
+	 *
+	 * The permalink structure for the date, if not set already depends on the
+	 * permalink structure. It can be one of three formats. The first is year,
+	 * month, day; the second is day, month, year; and the last format is month,
+	 * day, year. These are matched against the permalink structure for which
+	 * one is used. If none matches, then the default will be used, which is
+	 * year, month, day.
+	 *
+	 * Prevents post ID and date permalinks from overlapping. In the case of
+	 * post_id, the date permalink will be prepended with front permalink with
+	 * 'date/' before the actual permalink to form the complete date permalink
+	 * structure.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return bool|string False on no permalink structure. Date permalink structure.
+	 */
+	function get_date_permastruct() {
+		if (isset($this->date_structure)) {
+			return $this->date_structure;
+		}
+
+		if (empty($this->permalink_structure)) {
+			$this->date_structure = '';
+			return false;
+		}
+
+		// The date permalink must have year, month, and day separated by slashes.
+		$endians = array('%year%/%monthnum%/%day%', '%day%/%monthnum%/%year%', '%monthnum%/%day%/%year%');
+
+		$this->date_structure = '';
+		$date_endian = '';
+
+		foreach ($endians as $endian) {
+			if (false !== strpos($this->permalink_structure, $endian)) {
+				$date_endian= $endian;
+				break;
+			}
+		}
+
+		if ( empty($date_endian) )
+			$date_endian = '%year%/%monthnum%/%day%';
+
+		// Do not allow the date tags and %post_id% to overlap in the permalink
+		// structure. If they do, move the date tags to $front/date/.
+		$front = $this->front;
+		preg_match_all('/%.+?%/', $this->permalink_structure, $tokens);
+		$tok_index = 1;
+		foreach ( (array) $tokens[0] as $token) {
+			if ( ($token == '%post_id%') && ($tok_index <= 3) ) {
+				$front = $front . 'date/';
+				break;
+			}
+			$tok_index++;
+		}
+
+		$this->date_structure = $front . $date_endian;
+
+		return $this->date_structure;
+	}
+
+	/**
+	 * Retrieve the year permalink structure without month and day.
+	 *
+	 * Gets the date permalink structure and strips out the month and day
+	 * permalink structures.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return bool|string False on failure. Year structure on success.
+	 */
+	function get_year_permastruct() {
+		$structure = $this->get_date_permastruct($this->permalink_structure);
+
+		if (empty($structure)) {
+			return false;
+		}
+
+		$structure = str_replace('%monthnum%', '', $structure);
+		$structure = str_replace('%day%', '', $structure);
+
+		$structure = preg_replace('#/+#', '/', $structure);
+
+		return $structure;
+	}
+
+	/**
+	 * Retrieve the month permalink structure without day and with year.
+	 *
+	 * Gets the date permalink structure and strips out the day permalink
+	 * structures. Keeps the year permalink structure.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return bool|string False on failure. Year/Month structure on success.
+	 */
+	function get_month_permastruct() {
+		$structure = $this->get_date_permastruct($this->permalink_structure);
+
+		if (empty($structure)) {
+			return false;
+		}
+
+		$structure = str_replace('%day%', '', $structure);
+
+		$structure = preg_replace('#/+#', '/', $structure);
+
+		return $structure;
+	}
+
+	/**
+	 * Retrieve the day permalink structure with month and year.
+	 *
+	 * Keeps date permalink structure with all year, month, and day.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return bool|string False on failure. Year/Month/Day structure on success.
+	 */
+	function get_day_permastruct() {
+		return $this->get_date_permastruct($this->permalink_structure);
+	}
+
+	/**
+	 * Retrieve the permalink structure for categories.
+	 *
+	 * If the category_base property has no value, then the category structure
+	 * will have the front property value, followed by 'category', and finally
+	 * '%category%'. If it does, then the root property will be used, along with
+	 * the category_base property value.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return bool|string False on failure. Category permalink structure.
+	 */
+	function get_category_permastruct() {
+		if (isset($this->category_structure)) {
+			return $this->category_structure;
+		}
+
+		if (empty($this->permalink_structure)) {
+			$this->category_structure = '';
+			return false;
+		}
+
+		if (empty($this->category_base))
+			$this->category_structure = trailingslashit( $this->front . 'category' );
+		else
+			$this->category_structure = trailingslashit( '/' . $this->root . $this->category_base );
+
+		$this->category_structure .= '%category%';
+
+		return $this->category_structure;
+	}
+
+	/**
+	 * Retrieve the permalink structure for tags.
+	 *
+	 * If the tag_base property has no value, then the tag structure will have
+	 * the front property value, followed by 'tag', and finally '%tag%'. If it
+	 * does, then the root property will be used, along with the tag_base
+	 * property value.
+	 *
+	 * @since 2.3.0
+	 * @access public
+	 *
+	 * @return bool|string False on failure. Tag permalink structure.
+	 */
+	function get_tag_permastruct() {
+		if (isset($this->tag_structure)) {
+			return $this->tag_structure;
+		}
+
+		if (empty($this->permalink_structure)) {
+			$this->tag_structure = '';
+			return false;
+		}
+
+		if (empty($this->tag_base))
+			$this->tag_structure = trailingslashit( $this->front . 'tag' );
+		else
+			$this->tag_structure = trailingslashit( '/' . $this->root . $this->tag_base );
+
+		$this->tag_structure .= '%tag%';
+
+		return $this->tag_structure;
+	}
+
+	/**
+	 * Retrieve extra permalink structure by name.
+	 *
+	 * @since unknown
+	 * @access public
+	 *
+	 * @param string $name Permalink structure name.
+	 * @return string|bool False if not found. Permalink structure string.
+	 */
+	function get_extra_permastruct($name) {
+		if ( isset($this->extra_permastructs[$name]) )
+			return $this->extra_permastructs[$name];
+		return false;
+	}
+
+	/**
+	 * Retrieve the author permalink structure.
+	 *
+	 * The permalink structure is front property, author base, and finally
+	 * '/%author%'. Will set the author_structure property and then return it
+	 * without attempting to set the value again.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return string|bool False if not found. Permalink structure string.
+	 */
+	function get_author_permastruct() {
+		if (isset($this->author_structure)) {
+			return $this->author_structure;
+		}
+
+		if (empty($this->permalink_structure)) {
+			$this->author_structure = '';
+			return false;
+		}
+
+		$this->author_structure = $this->front . $this->author_base . '/%author%';
+
+		return $this->author_structure;
+	}
+
+	/**
+	 * Retrieve the search permalink structure.
+	 *
+	 * The permalink structure is root property, search base, and finally
+	 * '/%search%'. Will set the search_structure property and then return it
+	 * without attempting to set the value again.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return string|bool False if not found. Permalink structure string.
+	 */
+	function get_search_permastruct() {
+		if (isset($this->search_structure)) {
+			return $this->search_structure;
+		}
+
+		if (empty($this->permalink_structure)) {
+			$this->search_structure = '';
+			return false;
+		}
+
+		$this->search_structure = $this->root . $this->search_base . '/%search%';
+
+		return $this->search_structure;
+	}
+
+	/**
+	 * Retrieve the page permalink structure.
+	 *
+	 * The permalink structure is root property, and '%pagename%'. Will set the
+	 * page_structure property and then return it without attempting to set the
+	 * value again.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return string|bool False if not found. Permalink structure string.
+	 */
+	function get_page_permastruct() {
+		if (isset($this->page_structure)) {
+			return $this->page_structure;
+		}
+
+		if (empty($this->permalink_structure)) {
+			$this->page_structure = '';
+			return false;
+		}
+
+		$this->page_structure = $this->root . '%pagename%';
+
+		return $this->page_structure;
+	}
+
+	/**
+	 * Retrieve the feed permalink structure.
+	 *
+	 * The permalink structure is root property, feed base, and finally
+	 * '/%feed%'. Will set the feed_structure property and then return it
+	 * without attempting to set the value again.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return string|bool False if not found. Permalink structure string.
+	 */
+	function get_feed_permastruct() {
+		if (isset($this->feed_structure)) {
+			return $this->feed_structure;
+		}
+
+		if (empty($this->permalink_structure)) {
+			$this->feed_structure = '';
+			return false;
+		}
+
+		$this->feed_structure = $this->root . $this->feed_base . '/%feed%';
+
+		return $this->feed_structure;
+	}
+
+	/**
+	 * Retrieve the comment feed permalink structure.
+	 *
+	 * The permalink structure is root property, comment base property, feed
+	 * base and finally '/%feed%'. Will set the comment_feed_structure property
+	 * and then return it without attempting to set the value again.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return string|bool False if not found. Permalink structure string.
+	 */
+	function get_comment_feed_permastruct() {
+		if (isset($this->comment_feed_structure)) {
+			return $this->comment_feed_structure;
+		}
+
+		if (empty($this->permalink_structure)) {
+			$this->comment_feed_structure = '';
+			return false;
+		}
+
+		$this->comment_feed_structure = $this->root . $this->comments_base . '/' . $this->feed_base . '/%feed%';
+
+		return $this->comment_feed_structure;
+	}
+
+	/**
+	 * Append or update tag, pattern, and query for replacement.
+	 *
+	 * If the tag already exists, replace the existing pattern and query for
+	 * that tag, otherwise add the new tag, pattern, and query to the end of the
+	 * arrays.
+	 *
+	 * @internal What is the purpose of this function again? Need to finish long
+	 *           description.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @param string $tag Append tag to rewritecode property array.
+	 * @param string $pattern Append pattern to rewritereplace property array.
+	 * @param string $query Append query to queryreplace property array.
+	 */
+	function add_rewrite_tag($tag, $pattern, $query) {
+		$position = array_search($tag, $this->rewritecode);
+		if ( false !== $position && null !== $position ) {
+			$this->rewritereplace[$position] = $pattern;
+			$this->queryreplace[$position] = $query;
+		} else {
+			$this->rewritecode[] = $tag;
+			$this->rewritereplace[] = $pattern;
+			$this->queryreplace[] = $query;
+		}
+	}
+
+	/**
+	 * Generate the rules from permalink structure.
+	 *
+	 * The main WP_Rewrite function for building the rewrite rule list. The
+	 * contents of the function is a mix of black magic and regular expressions,
+	 * so best just ignore the contents and move to the parameters.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @param string $permalink_structure The permalink structure.
+	 * @param int $ep_mask Optional, default is EP_NONE. Endpoint constant, see EP_* constants.
+	 * @param bool $paged Optional, default is true. Whether permalink request is paged.
+	 * @param bool $feed Optional, default is true. Whether for feed.
+	 * @param bool $forcomments Optional, default is false. Whether for comments.
+	 * @param bool $walk_dirs Optional, default is true. Whether to create list of directories to walk over.
+	 * @param bool $endpoints Optional, default is true. Whether endpoints are enabled.
+	 * @return array Rewrite rule list.
+	 */
+	function generate_rewrite_rules($permalink_structure, $ep_mask = EP_NONE, $paged = true, $feed = true, $forcomments = false, $walk_dirs = true, $endpoints = true) {
+		//build a regex to match the feed section of URLs, something like (feed|atom|rss|rss2)/?
+		$feedregex2 = '';
+		foreach ( (array) $this->feeds as $feed_name) {
+			$feedregex2 .= $feed_name . '|';
+		}
+		$feedregex2 = '(' . trim($feedregex2, '|') .  ')/?$';
+		//$feedregex is identical but with /feed/ added on as well, so URLs like <permalink>/feed/atom
+		//and <permalink>/atom are both possible
+		$feedregex = $this->feed_base  . '/' . $feedregex2;
+
+		//build a regex to match the trackback and page/xx parts of URLs
+		$trackbackregex = 'trackback/?$';
+		$pageregex = 'page/?([0-9]{1,})/?$';
+		$commentregex = 'comment-page-([0-9]{1,})/?$';
+
+		//build up an array of endpoint regexes to append => queries to append
+		if ($endpoints) {
+			$ep_query_append = array ();
+			foreach ( (array) $this->endpoints as $endpoint) {
+				//match everything after the endpoint name, but allow for nothing to appear there
+				$epmatch = $endpoint[1] . '(/(.*))?/?$';
+				//this will be appended on to the rest of the query for each dir
+				$epquery = '&' . $endpoint[1] . '=';
+				$ep_query_append[$epmatch] = array ( $endpoint[0], $epquery );
+			}
+		}
+
+		//get everything up to the first rewrite tag
+		$front = substr($permalink_structure, 0, strpos($permalink_structure, '%'));
+		//build an array of the tags (note that said array ends up being in $tokens[0])
+		preg_match_all('/%.+?%/', $permalink_structure, $tokens);
+
+		$num_tokens = count($tokens[0]);
+
+		$index = $this->index; //probably 'index.php'
+		$feedindex = $index;
+		$trackbackindex = $index;
+		//build a list from the rewritecode and queryreplace arrays, that will look something like
+		//tagname=$matches[i] where i is the current $i
+		for ($i = 0; $i < $num_tokens; ++$i) {
+			if (0 < $i) {
+				$queries[$i] = $queries[$i - 1] . '&';
+			} else {
+				$queries[$i] = '';
+			}
+
+			$query_token = str_replace($this->rewritecode, $this->queryreplace, $tokens[0][$i]) . $this->preg_index($i+1);
+			$queries[$i] .= $query_token;
+		}
+
+		//get the structure, minus any cruft (stuff that isn't tags) at the front
+		$structure = $permalink_structure;
+		if ($front != '/') {
+			$structure = str_replace($front, '', $structure);
+		}
+		//create a list of dirs to walk over, making rewrite rules for each level
+		//so for example, a $structure of /%year%/%month%/%postname% would create
+		//rewrite rules for /%year%/, /%year%/%month%/ and /%year%/%month%/%postname%
+		$structure = trim($structure, '/');
+		if ($walk_dirs) {
+			$dirs = explode('/', $structure);
+		} else {
+			$dirs[] = $structure;
+		}
+		$num_dirs = count($dirs);
+
+		//strip slashes from the front of $front
+		$front = preg_replace('|^/+|', '', $front);
+
+		//the main workhorse loop
+		$post_rewrite = array();
+		$struct = $front;
+		for ($j = 0; $j < $num_dirs; ++$j) {
+			//get the struct for this dir, and trim slashes off the front
+			$struct .= $dirs[$j] . '/'; //accumulate. see comment near explode('/', $structure) above
+			$struct = ltrim($struct, '/');
+			//replace tags with regexes
+			$match = str_replace($this->rewritecode, $this->rewritereplace, $struct);
+			//make a list of tags, and store how many there are in $num_toks
+			$num_toks = preg_match_all('/%.+?%/', $struct, $toks);
+			//get the 'tagname=$matches[i]'
+			$query = ( isset($queries) && is_array($queries) ) ? $queries[$num_toks - 1] : '';
+
+			//set up $ep_mask_specific which is used to match more specific URL types
+			switch ($dirs[$j]) {
+				case '%year%': $ep_mask_specific = EP_YEAR; break;
+				case '%monthnum%': $ep_mask_specific = EP_MONTH; break;
+				case '%day%': $ep_mask_specific = EP_DAY; break;
+			}
+
+			//create query for /page/xx
+			$pagematch = $match . $pageregex;
+			$pagequery = $index . '?' . $query . '&paged=' . $this->preg_index($num_toks + 1);
+
+			//create query for /comment-page-xx
+			$commentmatch = $match . $commentregex;
+			$commentquery = $index . '?' . $query . '&cpage=' . $this->preg_index($num_toks + 1);
+
+			if ( get_option('page_on_front') ) {
+				//create query for Root /comment-page-xx
+				$rootcommentmatch = $match . $commentregex;
+				$rootcommentquery = $index . '?' . $query . '&page_id=' . get_option('page_on_front') . '&cpage=' . $this->preg_index($num_toks + 1);
+			}
+
+			//create query for /feed/(feed|atom|rss|rss2|rdf)
+			$feedmatch = $match . $feedregex;
+			$feedquery = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);
+
+			//create query for /(feed|atom|rss|rss2|rdf) (see comment near creation of $feedregex)
+			$feedmatch2 = $match . $feedregex2;
+			$feedquery2 = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);
+
+			//if asked to, turn the feed queries into comment feed ones
+			if ($forcomments) {
+				$feedquery .= '&withcomments=1';
+				$feedquery2 .= '&withcomments=1';
+			}
+
+			//start creating the array of rewrites for this dir
+			$rewrite = array();
+			if ($feed) //...adding on /feed/ regexes => queries
+				$rewrite = array($feedmatch => $feedquery, $feedmatch2 => $feedquery2);
+			if ($paged) //...and /page/xx ones
+				$rewrite = array_merge($rewrite, array($pagematch => $pagequery));
+
+			//only on pages with comments add ../comment-page-xx/
+			if ( EP_PAGES & $ep_mask || EP_PERMALINK & $ep_mask || EP_NONE & $ep_mask )
+				$rewrite = array_merge($rewrite, array($commentmatch => $commentquery));
+			else if ( EP_ROOT & $ep_mask && get_option('page_on_front') )
+				$rewrite = array_merge($rewrite, array($rootcommentmatch => $rootcommentquery));
+
+			//do endpoints
+			if ($endpoints) {
+				foreach ( (array) $ep_query_append as $regex => $ep) {
+					//add the endpoints on if the mask fits
+					if ($ep[0] & $ep_mask || $ep[0] & $ep_mask_specific) {
+						$rewrite[$match . $regex] = $index . '?' . $query . $ep[1] . $this->preg_index($num_toks + 2);
+					}
+				}
+			}
+
+			//if we've got some tags in this dir
+			if ($num_toks) {
+				$post = false;
+				$page = false;
+
+				//check to see if this dir is permalink-level: i.e. the structure specifies an
+				//individual post. Do this by checking it contains at least one of 1) post name,
+				//2) post ID, 3) page name, 4) timestamp (year, month, day, hour, second and
+				//minute all present). Set these flags now as we need them for the endpoints.
+				if (strpos($struct, '%postname%') !== false || strpos($struct, '%post_id%') !== false
+						|| strpos($struct, '%pagename%') !== false
+						|| (strpos($struct, '%year%') !== false && strpos($struct, '%monthnum%') !== false && strpos($struct, '%day%') !== false && strpos($struct, '%hour%') !== false && strpos($struct, '%minute%') !== false && strpos($struct, '%second%') !== false)) {
+					$post = true;
+					if (strpos($struct, '%pagename%') !== false)
+						$page = true;
+				}
+
+				//if we're creating rules for a permalink, do all the endpoints like attachments etc
+				if ($post) {
+					$post = true;
+					//create query and regex for trackback
+					$trackbackmatch = $match . $trackbackregex;
+					$trackbackquery = $trackbackindex . '?' . $query . '&tb=1';
+					//trim slashes from the end of the regex for this dir
+					$match = rtrim($match, '/');
+					//get rid of brackets
+					$submatchbase = str_replace(array('(',')'),'',$match);
+
+					//add a rule for at attachments, which take the form of <permalink>/some-text
+					$sub1 = $submatchbase . '/([^/]+)/';
+					$sub1tb = $sub1 . $trackbackregex; //add trackback regex <permalink>/trackback/...
+					$sub1feed = $sub1 . $feedregex; //and <permalink>/feed/(atom|...)
+					$sub1feed2 = $sub1 . $feedregex2; //and <permalink>/(feed|atom...)
+					$sub1comment = $sub1 . $commentregex; //and <permalink>/comment-page-xx
+					//add an ? as we don't have to match that last slash, and finally a $ so we
+					//match to the end of the URL
+
+					//add another rule to match attachments in the explicit form:
+					//<permalink>/attachment/some-text
+					$sub2 = $submatchbase . '/attachment/([^/]+)/';
+					$sub2tb = $sub2 . $trackbackregex; //and add trackbacks <permalink>/attachment/trackback
+					$sub2feed = $sub2 . $feedregex;    //feeds, <permalink>/attachment/feed/(atom|...)
+					$sub2feed2 = $sub2 . $feedregex2;  //and feeds again on to this <permalink>/attachment/(feed|atom...)
+					$sub2comment = $sub2 . $commentregex; //and <permalink>/comment-page-xx
+
+					//create queries for these extra tag-ons we've just dealt with
+					$subquery = $index . '?attachment=' . $this->preg_index(1);
+					$subtbquery = $subquery . '&tb=1';
+					$subfeedquery = $subquery . '&feed=' . $this->preg_index(2);
+					$subcommentquery = $subquery . '&cpage=' . $this->preg_index(2);
+
+					//do endpoints for attachments
+					if ( !empty($endpoint) ) { foreach ( (array) $ep_query_append as $regex => $ep ) {
+						if ($ep[0] & EP_ATTACHMENT) {
+							$rewrite[$sub1 . $regex] = $subquery . '?' . $ep[1] . $this->preg_index(2);
+							$rewrite[$sub2 . $regex] = $subquery . '?' . $ep[1] . $this->preg_index(2);
+						}
+					} }
+
+					//now we've finished with endpoints, finish off the $sub1 and $sub2 matches
+					$sub1 .= '?$';
+					$sub2 .= '?$';
+
+					//allow URLs like <permalink>/2 for <permalink>/page/2
+					$match = $match . '(/[0-9]+)?/?$';
+					$query = $index . '?' . $query . '&page=' . $this->preg_index($num_toks + 1);
+				} else { //not matching a permalink so this is a lot simpler
+					//close the match and finalise the query
+					$match .= '?$';
+					$query = $index . '?' . $query;
+				}
+
+				//create the final array for this dir by joining the $rewrite array (which currently
+				//only contains rules/queries for trackback, pages etc) to the main regex/query for
+				//this dir
+				$rewrite = array_merge($rewrite, array($match => $query));
+
+				//if we're matching a permalink, add those extras (attachments etc) on
+				if ($post) {
+					//add trackback
+					$rewrite = array_merge(array($trackbackmatch => $trackbackquery), $rewrite);
+
+					//add regexes/queries for attachments, attachment trackbacks and so on
+					if ( ! $page ) //require <permalink>/attachment/stuff form for pages because of confusion with subpages
+						$rewrite = array_merge($rewrite, array($sub1 => $subquery, $sub1tb => $subtbquery, $sub1feed => $subfeedquery, $sub1feed2 => $subfeedquery, $sub1comment => $subcommentquery));
+					$rewrite = array_merge(array($sub2 => $subquery, $sub2tb => $subtbquery, $sub2feed => $subfeedquery, $sub2feed2 => $subfeedquery, $sub2comment => $subcommentquery), $rewrite);
+				}
+			} //if($num_toks)
+			//add the rules for this dir to the accumulating $post_rewrite
+			$post_rewrite = array_merge($rewrite, $post_rewrite);
+		} //foreach ($dir)
+		return $post_rewrite; //the finished rules. phew!
+	}
+
+	/**
+	 * Generate Rewrite rules with permalink structure and walking directory only.
+	 *
+	 * Shorten version of {@link WP_Rewrite::generate_rewrite_rules()} that
+	 * allows for shorter list of parameters. See the method for longer
+	 * description of what generating rewrite rules does.
+	 *
+	 * @uses WP_Rewrite::generate_rewrite_rules() See for long description and rest of parameters.
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @param string $permalink_structure The permalink structure to generate rules.
+	 * @param bool $walk_dirs Optional, default is false. Whether to create list of directories to walk over.
+	 * @return array
+	 */
+	function generate_rewrite_rule($permalink_structure, $walk_dirs = false) {
+		return $this->generate_rewrite_rules($permalink_structure, EP_NONE, false, false, false, $walk_dirs);
+	}
+
+	/**
+	 * Construct rewrite matches and queries from permalink structure.
+	 *
+	 * Runs the action 'generate_rewrite_rules' with the parameter that is an
+	 * reference to the current WP_Rewrite instance to further manipulate the
+	 * permalink structures and rewrite rules. Runs the 'rewrite_rules_array'
+	 * filter on the full rewrite rule array.
+	 *
+	 * There are two ways to manipulate the rewrite rules, one by hooking into
+	 * the 'generate_rewrite_rules' action and gaining full control of the
+	 * object or just manipulating the rewrite rule array before it is passed
+	 * from the function.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return array An associate array of matches and queries.
+	 */
+	function rewrite_rules() {
+		$rewrite = array();
+
+		if (empty($this->permalink_structure)) {
+			return $rewrite;
+		}
+
+		// robots.txt
+		$robots_rewrite = array('robots\.txt$' => $this->index . '?robots=1');
+
+		//Default Feed rules - These are require to allow for the direct access files to work with permalink structure starting with %category%
+		$default_feeds = array(	'.*wp-atom.php$'	=>	$this->index .'?feed=atom',
+								'.*wp-rdf.php$'	=>	$this->index .'?feed=rdf',
+								'.*wp-rss.php$'	=>	$this->index .'?feed=rss',
+								'.*wp-rss2.php$'	=>	$this->index .'?feed=rss2',
+								'.*wp-feed.php$'	=>	$this->index .'?feed=feed',
+								'.*wp-commentsrss2.php$'	=>	$this->index . '?feed=rss2&withcomments=1');
+
+		// Post
+		$post_rewrite = $this->generate_rewrite_rules($this->permalink_structure, EP_PERMALINK);
+		$post_rewrite = apply_filters('post_rewrite_rules', $post_rewrite);
+
+		// Date
+		$date_rewrite = $this->generate_rewrite_rules($this->get_date_permastruct(), EP_DATE);
+		$date_rewrite = apply_filters('date_rewrite_rules', $date_rewrite);
+
+		// Root
+		$root_rewrite = $this->generate_rewrite_rules($this->root . '/', EP_ROOT);
+		$root_rewrite = apply_filters('root_rewrite_rules', $root_rewrite);
+
+		// Comments
+		$comments_rewrite = $this->generate_rewrite_rules($this->root . $this->comments_base, EP_COMMENTS, true, true, true, false);
+		$comments_rewrite = apply_filters('comments_rewrite_rules', $comments_rewrite);
+
+		// Search
+		$search_structure = $this->get_search_permastruct();
+		$search_rewrite = $this->generate_rewrite_rules($search_structure, EP_SEARCH);
+		$search_rewrite = apply_filters('search_rewrite_rules', $search_rewrite);
+
+		// Categories
+		$category_rewrite = $this->generate_rewrite_rules($this->get_category_permastruct(), EP_CATEGORIES);
+		$category_rewrite = apply_filters('category_rewrite_rules', $category_rewrite);
+
+		// Tags
+		$tag_rewrite = $this->generate_rewrite_rules($this->get_tag_permastruct(), EP_TAGS);
+		$tag_rewrite = apply_filters('tag_rewrite_rules', $tag_rewrite);
+
+		// Authors
+		$author_rewrite = $this->generate_rewrite_rules($this->get_author_permastruct(), EP_AUTHORS);
+		$author_rewrite = apply_filters('author_rewrite_rules', $author_rewrite);
+
+		// Pages
+		$page_rewrite = $this->page_rewrite_rules();
+		$page_rewrite = apply_filters('page_rewrite_rules', $page_rewrite);
+
+		// Extra permastructs
+		foreach ( $this->extra_permastructs as $permastruct )
+			$this->extra_rules_top = array_merge($this->extra_rules_top, $this->generate_rewrite_rules($permastruct, EP_NONE));
+
+		// Put them together.
+		if ( $this->use_verbose_page_rules )
+			$this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $default_feeds, $page_rewrite, $root_rewrite, $comments_rewrite, $search_rewrite, $category_rewrite, $tag_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $this->extra_rules);
+		else
+			$this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $default_feeds, $root_rewrite, $comments_rewrite, $search_rewrite, $category_rewrite, $tag_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $page_rewrite, $this->extra_rules);
+
+		do_action_ref_array('generate_rewrite_rules', array(&$this));
+		$this->rules = apply_filters('rewrite_rules_array', $this->rules);
+
+		return $this->rules;
+	}
+
+	/**
+	 * Retrieve the rewrite rules.
+	 *
+	 * The difference between this method and {@link
+	 * WP_Rewrite::rewrite_rules()} is that this method stores the rewrite rules
+	 * in the 'rewrite_rules' option and retrieves it. This prevents having to
+	 * process all of the permalinks to get the rewrite rules in the form of
+	 * caching.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return array Rewrite rules.
+	 */
+	function wp_rewrite_rules() {
+		$this->rules = get_transient('rewrite_rules');
+		if ( empty($this->rules) ) {
+			$this->matches = 'matches';
+			$this->rewrite_rules();
+			set_transient('rewrite_rules', $this->rules);
+		}
+
+		return $this->rules;
+	}
+
+	/**
+	 * Retrieve mod_rewrite formatted rewrite rules to write to .htaccess.
+	 *
+	 * Does not actually write to the .htaccess file, but creates the rules for
+	 * the process that will.
+	 *
+	 * Will add  the non_wp_rules property rules to the .htaccess file before
+	 * the WordPress rewrite rules one.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return string
+	 */
+	function mod_rewrite_rules() {
+		if ( ! $this->using_permalinks()) {
+			return '';
+		}
+
+		$site_root = parse_url(get_option('siteurl'));
+		if ( isset( $site_root['path'] ) ) {
+			$site_root = trailingslashit($site_root['path']);
+		}
+
+		$home_root = parse_url(get_option('home'));
+		if ( isset( $home_root['path'] ) ) {
+			$home_root = trailingslashit($home_root['path']);
+		} else {
+			$home_root = '/';
+		}
+
+		$rules = "<IfModule mod_rewrite.c>\n";
+		$rules .= "RewriteEngine On\n";
+		$rules .= "RewriteBase $home_root\n";
+
+		//add in the rules that don't redirect to WP's index.php (and thus shouldn't be handled by WP at all)
+		foreach ( (array) $this->non_wp_rules as $match => $query) {
+			// Apache 1.3 does not support the reluctant (non-greedy) modifier.
+			$match = str_replace('.+?', '.+', $match);
+
+			// If the match is unanchored and greedy, prepend rewrite conditions
+			// to avoid infinite redirects and eclipsing of real files.
+			if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
+				//nada.
+			}
+
+			$rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
+		}
+
+		if ($this->use_verbose_rules) {
+			$this->matches = '';
+			$rewrite = $this->rewrite_rules();
+			$num_rules = count($rewrite);
+			$rules .= "RewriteCond %{REQUEST_FILENAME} -f [OR]\n" .
+				"RewriteCond %{REQUEST_FILENAME} -d\n" .
+				"RewriteRule ^.*$ - [S=$num_rules]\n";
+
+			foreach ( (array) $rewrite as $match => $query) {
+				// Apache 1.3 does not support the reluctant (non-greedy) modifier.
+				$match = str_replace('.+?', '.+', $match);
+
+				// If the match is unanchored and greedy, prepend rewrite conditions
+				// to avoid infinite redirects and eclipsing of real files.
+				if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
+					//nada.
+				}
+
+				if (strpos($query, $this->index) !== false) {
+					$rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
+				} else {
+					$rules .= 'RewriteRule ^' . $match . ' ' . $site_root . $query . " [QSA,L]\n";
+				}
+			}
+		} else {
+			$rules .= "RewriteCond %{REQUEST_FILENAME} !-f\n" .
+				"RewriteCond %{REQUEST_FILENAME} !-d\n" .
+				"RewriteRule . {$home_root}{$this->index} [L]\n";
+		}
+
+		$rules .= "</IfModule>\n";
+
+		$rules = apply_filters('mod_rewrite_rules', $rules);
+		$rules = apply_filters('rewrite_rules', $rules);  // Deprecated
+
+		return $rules;
+	}
+
+	/**
+	 * Retrieve IIS7 URL Rewrite formatted rewrite rules to write to web.config file.
+	 *
+	 * Does not actually write to the web.config file, but creates the rules for
+	 * the process that will.
+	 *
+	 * @since 2.8.0
+	 * @access public
+	 *
+	 * @return string
+	 */
+	function iis7_url_rewrite_rules(){
+
+		if ( ! $this->using_permalinks()) {
+			return '';
+		}
+		$rules  = "<rule name=\"wordpress\" patternSyntax=\"Wildcard\">\n";
+		$rules .= "	<match url=\"*\" />\n";
+		$rules .= "	<conditions>\n";
+		$rules .= "		<add input=\"{REQUEST_FILENAME}\" matchType=\"IsFile\" negate=\"true\" />\n";
+		$rules .= "		<add input=\"{REQUEST_FILENAME}\" matchType=\"IsDirectory\" negate=\"true\" />\n";
+		$rules .= "	</conditions>\n";
+		$rules .= "	<action type=\"Rewrite\" url=\"index.php\" />\n";
+		$rules .= "</rule>";
+
+		$rules = apply_filters('iis7_url_rewrite_rules', $rules);
+
+		return $rules;
+	}
+
+	/**
+	 * Add a straight rewrite rule.
+	 *
+	 * Any value in the $after parameter that isn't 'bottom' will be placed at
+	 * the top of the rules.
+	 *
+	 * @since 2.1.0
+	 * @access public
+	 *
+	 * @param string $regex Regular expression to match against request.
+	 * @param string $redirect URL regex redirects to when regex matches request.
+	 * @param string $after Optional, default is bottom. Location to place rule.
+	 */
+	function add_rule($regex, $redirect, $after = 'bottom') {
+		//get everything up to the first ?
+		$index = (strpos($redirect, '?') == false ? strlen($redirect) : strpos($redirect, '?'));
+		$front = substr($redirect, 0, $index);
+		if ($front != $this->index) { //it doesn't redirect to WP's index.php
+			$this->add_external_rule($regex, $redirect);
+		} else {
+			if ( 'bottom' == $after)
+				$this->extra_rules = array_merge($this->extra_rules, array($regex => $redirect));
+			else
+				$this->extra_rules_top = array_merge($this->extra_rules_top, array($regex => $redirect));
+			//$this->extra_rules[$regex] = $redirect;
+		}
+	}
+
+	/**
+	 * Add a rule that doesn't redirect to index.php.
+	 *
+	 * Can redirect to any place.
+	 *
+	 * @since 2.1.0
+	 * @access public
+	 *
+	 * @param string $regex Regular expression to match against request.
+	 * @param string $redirect URL regex redirects to when regex matches request.
+	 */
+	function add_external_rule($regex, $redirect) {
+		$this->non_wp_rules[$regex] = $redirect;
+	}
+
+	/**
+	 * Add an endpoint, like /trackback/.
+	 *
+	 * To be inserted after certain URL types (specified in $places).
+	 *
+	 * @since 2.1.0
+	 * @access public
+	 *
+	 * @param string $name Name of endpoint.
+	 * @param array $places URL types that endpoint can be used.
+	 */
+	function add_endpoint($name, $places) {
+		global $wp;
+		$this->endpoints[] = array ( $places, $name );
+		$wp->add_query_var($name);
+	}
+
+	/**
+	 * Add permalink structure.
+	 *
+	 * These are added along with the extra rewrite rules that are merged to the
+	 * top.
+	 *
+	 * @since unknown
+	 * @access public
+	 *
+	 * @param string $name Name for permalink structure.
+	 * @param string $struct Permalink structure.
+	 * @param bool $with_front Prepend front base to permalink structure.
+	 */
+	function add_permastruct($name, $struct, $with_front = true) {
+		if ( $with_front )
+			$struct = $this->front . $struct;
+		$this->extra_permastructs[$name] = $struct;
+	}
+
+	/**
+	 * Remove rewrite rules and then recreate rewrite rules.
+	 *
+	 * Calls {@link WP_Rewrite::wp_rewrite_rules()} after removing the
+	 * 'rewrite_rules' option. If the function named 'save_mod_rewrite_rules'
+	 * exists, it will be called.
+	 *
+	 * @since 2.0.1
+	 * @access public
+	 * @param $hard bool Whether to update .htaccess (hard flush) or just update rewrite_rules transient (soft flush). Default is true (hard).
+	 */
+	function flush_rules($hard = true) {
+		delete_transient('rewrite_rules');
+		$this->wp_rewrite_rules();
+		if ( $hard && function_exists('save_mod_rewrite_rules') )
+			save_mod_rewrite_rules();
+		if ( $hard && function_exists('iis7_save_url_rewrite_rules') )
+			iis7_save_url_rewrite_rules();
+	}
+
+	/**
+	 * Sets up the object's properties.
+	 *
+	 * The 'use_verbose_page_rules' object property will be set to true if the
+	 * permalink structure begins with one of the following: '%postname%', '%category%',
+	 * '%tag%', or '%author%'.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 */
+	function init() {
+		$this->extra_rules = $this->non_wp_rules = $this->endpoints = array();
+		$this->permalink_structure = get_option('permalink_structure');
+		$this->front = substr($this->permalink_structure, 0, strpos($this->permalink_structure, '%'));
+		$this->root = '';
+		if ($this->using_index_permalinks()) {
+			$this->root = $this->index . '/';
+		}
+		$this->category_base = get_option( 'category_base' );
+		$this->tag_base = get_option( 'tag_base' );
+		unset($this->category_structure);
+		unset($this->author_structure);
+		unset($this->date_structure);
+		unset($this->page_structure);
+		unset($this->search_structure);
+		unset($this->feed_structure);
+		unset($this->comment_feed_structure);
+		$this->use_trailing_slashes = ( substr($this->permalink_structure, -1, 1) == '/' ) ? true : false;
+
+		// Enable generic rules for pages if permalink structure doesn't begin with a wildcard.
+		if ( preg_match("/^[^%]*%(?:postname|category|tag|author)%/", $this->permalink_structure) )
+			 $this->use_verbose_page_rules = true;
+		else
+			$this->use_verbose_page_rules = false;
+	}
+
+	/**
+	 * Set the main permalink structure for the blog.
+	 *
+	 * Will update the 'permalink_structure' option, if there is a difference
+	 * between the current permalink structure and the parameter value. Calls
+	 * {@link WP_Rewrite::init()} after the option is updated.
+	 *
+	 * Fires the 'permalink_structure_changed' action once the init call has
+	 * processed passing the old and new values
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @param string $permalink_structure Permalink structure.
+	 */
+	function set_permalink_structure($permalink_structure) {
+		if ($permalink_structure != $this->permalink_structure) {
+			update_option('permalink_structure', $permalink_structure);
+			$this->init();
+			do_action('permalink_structure_changed', $this->permalink_structure, $permalink_structure);
+		}
+	}
+
+	/**
+	 * Set the category base for the category permalink.
+	 *
+	 * Will update the 'category_base' option, if there is a difference between
+	 * the current category base and the parameter value. Calls
+	 * {@link WP_Rewrite::init()} after the option is updated.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @param string $category_base Category permalink structure base.
+	 */
+	function set_category_base($category_base) {
+		if ($category_base != $this->category_base) {
+			update_option('category_base', $category_base);
+			$this->init();
+		}
+	}
+
+	/**
+	 * Set the tag base for the tag permalink.
+	 *
+	 * Will update the 'tag_base' option, if there is a difference between the
+	 * current tag base and the parameter value. Calls
+	 * {@link WP_Rewrite::init()} after the option is updated.
+	 *
+	 * @since 2.3.0
+	 * @access public
+	 *
+	 * @param string $tag_base Tag permalink structure base.
+	 */
+	function set_tag_base( $tag_base ) {
+		if ( $tag_base != $this->tag_base ) {
+			update_option( 'tag_base', $tag_base );
+			$this->init();
+		}
+	}
+
+	/**
+	 * PHP4 Constructor - Calls init(), which runs setup.
+	 *
+	 * @since 1.5.0
+	 * @access public
+	 *
+	 * @return WP_Rewrite
+	 */
+	function WP_Rewrite() {
+		$this->init();
+	}
+}
+
+?>