classes.php

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			}
			$post_rewrite = array_merge($rewrite, $post_rewrite);
		}
		return $post_rewrite;
	}

	function generate_rewrite_rule($permalink_structure, $walk_dirs = false) {
		return $this->generate_rewrite_rules($permalink_structure, false, false, false, $walk_dirs);
	}

	/* rewrite_rules
	 * Construct rewrite matches and queries from permalink structure.
	 * Returns an associate array of matches and queries.
	 */
	function rewrite_rules() {
		$rewrite = array();

		if (empty($this->permalink_structure)) {
			return $rewrite;
		}

		// Post
		$post_rewrite = $this->generate_rewrite_rules($this->permalink_structure);
		$post_rewrite = apply_filters('post_rewrite_rules', $post_rewrite);

		// Date
		$date_rewrite = $this->generate_rewrite_rules($this->get_date_permastruct());
		$date_rewrite = apply_filters('date_rewrite_rules', $date_rewrite);
		
		// Root
		$root_rewrite = $this->generate_rewrite_rules($this->root . '/');
		$root_rewrite = apply_filters('root_rewrite_rules', $root_rewrite);

		// Comments
		$comments_rewrite = $this->generate_rewrite_rules($this->root . $this->comments_base, 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);
		$search_rewrite = apply_filters('search_rewrite_rules', $search_rewrite);

		// Categories
		$category_rewrite = $this->generate_rewrite_rules($this->get_category_permastruct());
		$category_rewrite = apply_filters('category_rewrite_rules', $category_rewrite);

		// Authors
		$author_rewrite = $this->generate_rewrite_rules($this->get_author_permastruct());
		$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);

		// Put them together.
		$this->rules = array_merge($page_rewrite, $root_rewrite, $comments_rewrite, $search_rewrite, $category_rewrite, $author_rewrite, $date_rewrite, $post_rewrite);

		do_action('generate_rewrite_rules', array(&$this));
		$this->rules = apply_filters('rewrite_rules_array', $this->rules);

		return $this->rules;
	}

	function wp_rewrite_rules() {
		$this->rules = get_option('rewrite_rules');
		if ( empty($this->rules) ) {
			$this->matches = 'matches';
			$this->rewrite_rules();
			update_option('rewrite_rules', $this->rules);
		}

		return $this->rules;
	}

	function mod_rewrite_rules() {
		if ( ! $this->using_permalinks()) {
			return '';
		}

		$site_root = parse_url(get_settings('siteurl'));
		$site_root = trailingslashit($site_root['path']);

		$home_root = parse_url(get_settings('home'));
		$home_root = trailingslashit($home_root['path']);
    
		$rules = "<IfModule mod_rewrite.c>\n";
		$rules .= "RewriteEngine On\n";
		$rules .= "RewriteBase $home_root\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 ($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 (strstr($query, $this->index)) {
					$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;
	}

	function flush_rules() {
		generate_page_rewrite_rules();
		delete_option('rewrite_rules');
		$this->wp_rewrite_rules();
		if ( function_exists('save_mod_rewrite_rules') )
			save_mod_rewrite_rules();
	}

	function init() {
		$this->permalink_structure = get_settings('permalink_structure');
		$this->front = substr($this->permalink_structure, 0, strpos($this->permalink_structure, '%'));		
		$this->root = '';
		if ($this->using_index_permalinks()) {
			$this->root = $this->index . '/';
		}
		$this->category_base = get_settings('category_base');
		unset($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);
	}

	function set_permalink_structure($permalink_structure) {
		if ($permalink_structure != $this->permalink_structure) {
			update_option('permalink_structure', $permalink_structure);
			$this->init();
		}
	}

	function set_category_base($category_base) {
		if ($category_base != $this->category_base) {
			update_option('category_base', $category_base);
			$this->init();
		}
	}

	function WP_Rewrite() {
		$this->init();
	}
}

class WP {
	var $public_query_vars = array('m', 'p', 'posts', 'w', 'cat', 'withcomments', 's', 'search', 'exact', 'sentence', 'debug', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'feed', 'author_name', 'static', 'pagename', 'page_id', 'error', 'comments_popup', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview');

	var $private_query_vars = array('posts_per_page', 'posts_per_archive_page', 'what_to_show', 'showposts', 'nopaging', 'show_post_type');

	var $query_vars;
	var $query_string;
	var $request;
	var $matched_rule;
	var $matched_query;
	var $did_permalink = false;

	function parse_request($extra_query_vars = '') {
		global $wp_rewrite;

		$this->query_vars = array();

		if (! empty($extra_query_vars))
			parse_str($extra_query_vars, $extra_query_vars);
		else
			$extra_query_vars = array();

		// Process PATH_INFO, REQUEST_URI, and 404 for permalinks.

		// Fetch the rewrite rules.
		$rewrite = $wp_rewrite->wp_rewrite_rules();

		if (! empty($rewrite)) {
			// If we match a rewrite rule, this will be cleared.
			$error = '404';
			$this->did_permalink = true;

			$pathinfo = $_SERVER['PATH_INFO'];
			$pathinfo_array = explode('?', $pathinfo);
			$pathinfo = $pathinfo_array[0];
			$req_uri = $_SERVER['REQUEST_URI'];
			$req_uri_array = explode('?', $req_uri);
			$req_uri = $req_uri_array[0];
			$self = $_SERVER['PHP_SELF'];
			$home_path = parse_url(get_settings('home'));
			$home_path = $home_path['path'];
			$home_path = trim($home_path, '/');

			// Trim path info from the end and the leading home path from the
			// front.  For path info requests, this leaves us with the requesting
			// filename, if any.  For 404 requests, this leaves us with the
			// requested permalink.	
			$req_uri = str_replace($pathinfo, '', $req_uri);
			$req_uri = trim($req_uri, '/');
			$req_uri = preg_replace("|^$home_path|", '', $req_uri);
			$req_uri = trim($req_uri, '/');
			$pathinfo = trim($pathinfo, '/');
			$pathinfo = preg_replace("|^$home_path|", '', $pathinfo);
			$pathinfo = trim($pathinfo, '/');
			$self = trim($self, '/');
			$self = preg_replace("|^$home_path|", '', $self);
			$self = str_replace($home_path, '', $self);
			$self = trim($self, '/');

			// The requested permalink is in $pathinfo for path info requests and
			//  $req_uri for other requests.
			if ( ! empty($pathinfo) && !preg_match('|^.*' . $wp_rewrite->index . '$|', $pathinfo) ) {
				$request = $pathinfo;
			} else {
				// If the request uri is the index, blank it out so that we don't try to match it against a rule.
				if ( $req_uri == $wp_rewrite->index )
					$req_uri = '';
				$request = $req_uri;
			}

			$this->request = $request;

			// Look for matches.
			$request_match = $request;
			foreach ($rewrite as $match => $query) {
				// If the requesting file is the anchor of the match, prepend it
				// to the path info.
				if ((! empty($req_uri)) && (strpos($match, $req_uri) === 0) && ($req_uri != $request)) {
					$request_match = $req_uri . '/' . $request;
				}

				if (preg_match("!^$match!", $request_match, $matches) ||
					preg_match("!^$match!", urldecode($request_match), $matches)) {
					// Got a match.
					$this->matched_rule = $match;

					// Trim the query of everything up to the '?'.
					$query = preg_replace("!^.+\?!", '', $query);

					// Substitute the substring matches into the query.
					eval("\$query = \"$query\";");
					$this->matched_query = $query;

					// Parse the query.
					parse_str($query, $query_vars);

					// If we're processing a 404 request, clear the error var
					// since we found something.
					if (isset($_GET['error']))
						unset($_GET['error']);

					if (isset($error))
						unset($error);

					break;
				}
			}

			// If req_uri is empty or if it is a request for ourself, unset error.
			if ( empty($request) || $req_uri == $self || strstr($_SERVER['PHP_SELF'], 'wp-admin/') ) {
				if (isset($_GET['error']))
					unset($_GET['error']);

				if (isset($error))
					unset($error);
					
				if ( isset($query_vars) && strstr($_SERVER['PHP_SELF'], 'wp-admin/') )
					unset($query_vars);
					
				$this->did_permalink = false;
			}
		}

		$this->public_query_vars = apply_filters('query_vars', $this->public_query_vars);

		for ($i=0; $i<count($this->public_query_vars); $i += 1) {
			$wpvar = $this->public_query_vars[$i];
			if (isset($extra_query_vars[$wpvar]))
				$this->query_vars[$wpvar] = $extra_query_vars[$wpvar];
			elseif (isset($GLOBALS[$wpvar]))
				$this->query_vars[$wpvar] = $GLOBALS[$wpvar];
			elseif (!empty($_POST[$wpvar]))
				$this->query_vars[$wpvar] = $_POST[$wpvar];
			elseif (!empty($_GET[$wpvar]))
				$this->query_vars[$wpvar] = $_GET[$wpvar];
			elseif (!empty($query_vars[$wpvar]))
				$this->query_vars[$wpvar] = $query_vars[$wpvar];
			else
				$this->query_vars[$wpvar] = '';
		}

		if ( isset($error) )
			$this->query_vars['error'] = $error;
	}

	function send_headers() {
		@header('X-Pingback: '. get_bloginfo('pingback_url'));
		if ( is_user_logged_in() )
			nocache_headers();
		if ( !empty($this->query_vars['error']) && '404' == $this->query_vars['error'] ) {
			status_header( 404 );
			@header('Content-type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset'));
		} else if ( empty($this->query_vars['feed']) ) {
			@header('Content-type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset'));
		} else {
			// We're showing a feed, so WP is indeed the only thing that last changed
			if ( $this->query_vars['withcomments'] )
				$wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastcommentmodified('GMT'), 0).' GMT';
			else 
				$wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastpostmodified('GMT'), 0).' GMT';
			$wp_etag = '"' . md5($wp_last_modified) . '"';
			@header("Last-Modified: $wp_last_modified");
			@header("ETag: $wp_etag");

			// Support for Conditional GET
			if (isset($_SERVER['HTTP_IF_NONE_MATCH'])) $client_etag = stripslashes($_SERVER['HTTP_IF_NONE_MATCH']);
			else $client_etag = false;

			$client_last_modified = trim( $_SERVER['HTTP_IF_MODIFIED_SINCE']);
			// If string is empty, return 0. If not, attempt to parse into a timestamp
			$client_modified_timestamp = $client_last_modified ? strtotime($client_last_modified) : 0;

			// Make a timestamp for our most recent modification...	
			$wp_modified_timestamp = strtotime($wp_last_modified);

			if ( ($client_last_modified && $client_etag) ?
					 (($client_modified_timestamp >= $wp_modified_timestamp) && ($client_etag == $wp_etag)) :
					 (($client_modified_timestamp >= $wp_modified_timestamp) || ($client_etag == $wp_etag)) ) {
				status_header( 304 );
				exit;
			}
		}
	}

	function build_query_string() {
		$this->query_string = '';

		foreach ($this->public_query_vars as $wpvar) {
			if (isset($this->query_vars[$wpvar]) && '' != $this->query_vars[$wpvar]) {
				$this->query_string .= (strlen($this->query_string) < 1) ? '' : '&';
				$this->query_string .= $wpvar . '=' . rawurlencode($this->query_vars[$wpvar]);
			}
		}

		foreach ($this->private_query_vars as $wpvar) {
			if (isset($GLOBALS[$wpvar]) && '' != $GLOBALS[$wpvar]) {
				$this->query_string .= (strlen($this->query_string) < 1) ? '' : '&';
				$this->query_string .= $wpvar . '=' . rawurlencode($GLOBALS[$wpvar]);
			}
		}

		$this->query_string = apply_filters('query_string', $this->query_string);
	}

	function register_globals() {
		global $wp_query;
		// Extract updated query vars back into global namespace.
		foreach ($wp_query->query_vars as $key => $value) {
			$GLOBALS[$key] = $value;
		}

		$GLOBALS['query_string'] = & $this->query_string;
		$GLOBALS['posts'] = & $wp_query->posts;
		$GLOBALS['post'] = & $wp_query->post;
		$GLOBALS['request'] = & $wp_query->request;

		if ( is_single() || is_page() ) {
			$GLOBALS['more'] = 1;
			$GLOBALS['single'] = 1;
		}
	}

	function init() {
		wp_get_current_user();
	}

	function query_posts() {
		$this->build_query_string();
		query_posts($this->query_string);
 	}

	function handle_404() {
		global $wp_query;
		// Issue a 404 if a permalink request doesn't match any posts.  Don't
		// issue a 404 if one was already issued, if the request was a search,
		// or if the request was a regular query string request rather than a
		// permalink request.
		if ( (0 == count($wp_query->posts)) && !is_404() && !is_search() && ( $this->did_permalink || (!empty($_SERVER['QUERY_STRING']) && (false === strpos($_SERVER['REQUEST_URI'], '?'))) ) ) {
			$wp_query->set_404();
			status_header( 404 );
		}	elseif( is_404() != true ) {
			status_header( 200 );
		}
	}

	function main($query_args = '') {
		$this->init();
		$this->parse_request($query_args);
		$this->send_headers();
		$this->query_posts();
		$this->handle_404();
		$this->register_globals();
	}

	function WP() {
		// Empty.
	}
}

?>