diff -r fcf75e232c5b -r 0ff3ba646492 web/drupal/includes/common.inc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/drupal/includes/common.inc	Fri Aug 21 16:26:26 2009 +0000
@@ -0,0 +1,3692 @@
+<?php
+// $Id: common.inc,v 1.756.2.57 2009/07/01 20:51:55 goba Exp $
+
+/**
+ * @file
+ * Common functions that many Drupal modules will need to reference.
+ *
+ * The functions that are critical and need to be available even when serving
+ * a cached page are instead located in bootstrap.inc.
+ */
+
+/**
+ * Return status for saving which involved creating a new item.
+ */
+define('SAVED_NEW', 1);
+
+/**
+ * Return status for saving which involved an update to an existing item.
+ */
+define('SAVED_UPDATED', 2);
+
+/**
+ * Return status for saving which deleted an existing item.
+ */
+define('SAVED_DELETED', 3);
+
+/**
+ * Set content for a specified region.
+ *
+ * @param $region
+ *   Page region the content is assigned to.
+ * @param $data
+ *   Content to be set.
+ */
+function drupal_set_content($region = NULL, $data = NULL) {
+  static $content = array();
+
+  if (!is_null($region) && !is_null($data)) {
+    $content[$region][] = $data;
+  }
+  return $content;
+}
+
+/**
+ * Get assigned content.
+ *
+ * @param $region
+ *   A specified region to fetch content for. If NULL, all regions will be
+ *   returned.
+ * @param $delimiter
+ *   Content to be inserted between exploded array elements.
+ */
+function drupal_get_content($region = NULL, $delimiter = ' ') {
+  $content = drupal_set_content();
+  if (isset($region)) {
+    if (isset($content[$region]) && is_array($content[$region])) {
+      return implode($delimiter, $content[$region]);
+    }
+  }
+  else {
+    foreach (array_keys($content) as $region) {
+      if (is_array($content[$region])) {
+        $content[$region] = implode($delimiter, $content[$region]);
+      }
+    }
+    return $content;
+  }
+}
+
+/**
+ * Set the breadcrumb trail for the current page.
+ *
+ * @param $breadcrumb
+ *   Array of links, starting with "home" and proceeding up to but not including
+ *   the current page.
+ */
+function drupal_set_breadcrumb($breadcrumb = NULL) {
+  static $stored_breadcrumb;
+
+  if (!is_null($breadcrumb)) {
+    $stored_breadcrumb = $breadcrumb;
+  }
+  return $stored_breadcrumb;
+}
+
+/**
+ * Get the breadcrumb trail for the current page.
+ */
+function drupal_get_breadcrumb() {
+  $breadcrumb = drupal_set_breadcrumb();
+
+  if (is_null($breadcrumb)) {
+    $breadcrumb = menu_get_active_breadcrumb();
+  }
+
+  return $breadcrumb;
+}
+
+/**
+ * Add output to the head tag of the HTML page.
+ *
+ * This function can be called as long the headers aren't sent.
+ */
+function drupal_set_html_head($data = NULL) {
+  static $stored_head = '';
+
+  if (!is_null($data)) {
+    $stored_head .= $data ."\n";
+  }
+  return $stored_head;
+}
+
+/**
+ * Retrieve output to be displayed in the head tag of the HTML page.
+ */
+function drupal_get_html_head() {
+  $output = "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n";
+  return $output . drupal_set_html_head();
+}
+
+/**
+ * Reset the static variable which holds the aliases mapped for this request.
+ */
+function drupal_clear_path_cache() {
+  drupal_lookup_path('wipe');
+}
+
+/**
+ * Set an HTTP response header for the current page.
+ *
+ * Note: When sending a Content-Type header, always include a 'charset' type,
+ * too. This is necessary to avoid security bugs (e.g. UTF-7 XSS).
+ */
+function drupal_set_header($header = NULL) {
+  // We use an array to guarantee there are no leading or trailing delimiters.
+  // Otherwise, header('') could get called when serving the page later, which
+  // ends HTTP headers prematurely on some PHP versions.
+  static $stored_headers = array();
+
+  if (strlen($header)) {
+    header($header);
+    $stored_headers[] = $header;
+  }
+  return implode("\n", $stored_headers);
+}
+
+/**
+ * Get the HTTP response headers for the current page.
+ */
+function drupal_get_headers() {
+  return drupal_set_header();
+}
+
+/**
+ * Make any final alterations to the rendered xhtml.
+ */
+function drupal_final_markup($content) {
+  // Make sure that the charset is always specified as the first element of the
+  // head region to prevent encoding-based attacks.
+  return preg_replace('/<head[^>]*>/i', "\$0\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />", $content, 1);
+}
+
+/**
+ * Add a feed URL for the current page.
+ *
+ * @param $url
+ *   A url for the feed.
+ * @param $title
+ *   The title of the feed.
+ */
+function drupal_add_feed($url = NULL, $title = '') {
+  static $stored_feed_links = array();
+
+  if (!is_null($url) && !isset($stored_feed_links[$url])) {
+    $stored_feed_links[$url] = theme('feed_icon', $url, $title);
+
+    drupal_add_link(array('rel' => 'alternate',
+                          'type' => 'application/rss+xml',
+                          'title' => $title,
+                          'href' => $url));
+  }
+  return $stored_feed_links;
+}
+
+/**
+ * Get the feed URLs for the current page.
+ *
+ * @param $delimiter
+ *   A delimiter to split feeds by.
+ */
+function drupal_get_feeds($delimiter = "\n") {
+  $feeds = drupal_add_feed();
+  return implode($feeds, $delimiter);
+}
+
+/**
+ * @name HTTP handling
+ * @{
+ * Functions to properly handle HTTP responses.
+ */
+
+/**
+ * Parse an array into a valid urlencoded query string.
+ *
+ * @param $query
+ *   The array to be processed e.g. $_GET.
+ * @param $exclude
+ *   The array filled with keys to be excluded. Use parent[child] to exclude
+ *   nested items.
+ * @param $parent
+ *   Should not be passed, only used in recursive calls.
+ * @return
+ *   An urlencoded string which can be appended to/as the URL query string.
+ */
+function drupal_query_string_encode($query, $exclude = array(), $parent = '') {
+  $params = array();
+
+  foreach ($query as $key => $value) {
+    $key = drupal_urlencode($key);
+    if ($parent) {
+      $key = $parent .'['. $key .']';
+    }
+
+    if (in_array($key, $exclude)) {
+      continue;
+    }
+
+    if (is_array($value)) {
+      $params[] = drupal_query_string_encode($value, $exclude, $key);
+    }
+    else {
+      $params[] = $key .'='. drupal_urlencode($value);
+    }
+  }
+
+  return implode('&', $params);
+}
+
+/**
+ * Prepare a destination query string for use in combination with drupal_goto().
+ *
+ * Used to direct the user back to the referring page after completing a form.
+ * By default the current URL is returned. If a destination exists in the
+ * previous request, that destination is returned. As such, a destination can
+ * persist across multiple pages.
+ *
+ * @see drupal_goto()
+ */
+function drupal_get_destination() {
+  if (isset($_REQUEST['destination'])) {
+    return 'destination='. urlencode($_REQUEST['destination']);
+  }
+  else {
+    // Use $_GET here to retrieve the original path in source form.
+    $path = isset($_GET['q']) ? $_GET['q'] : '';
+    $query = drupal_query_string_encode($_GET, array('q'));
+    if ($query != '') {
+      $path .= '?'. $query;
+    }
+    return 'destination='. urlencode($path);
+  }
+}
+
+/**
+ * Send the user to a different Drupal page.
+ *
+ * This issues an on-site HTTP redirect. The function makes sure the redirected
+ * URL is formatted correctly.
+ *
+ * Usually the redirected URL is constructed from this function's input
+ * parameters. However you may override that behavior by setting a
+ * destination in either the $_REQUEST-array (i.e. by using
+ * the query string of an URI) or the $_REQUEST['edit']-array (i.e. by
+ * using a hidden form field). This is used to direct the user back to
+ * the proper page after completing a form. For example, after editing
+ * a post on the 'admin/content/node'-page or after having logged on using the
+ * 'user login'-block in a sidebar. The function drupal_get_destination()
+ * can be used to help set the destination URL.
+ *
+ * Drupal will ensure that messages set by drupal_set_message() and other
+ * session data are written to the database before the user is redirected.
+ *
+ * This function ends the request; use it rather than a print theme('page')
+ * statement in your menu callback.
+ *
+ * @param $path
+ *   A Drupal path or a full URL.
+ * @param $query
+ *   A query string component, if any.
+ * @param $fragment
+ *   A destination fragment identifier (named anchor).
+ * @param $http_response_code
+ *   Valid values for an actual "goto" as per RFC 2616 section 10.3 are:
+ *   - 301 Moved Permanently (the recommended value for most redirects)
+ *   - 302 Found (default in Drupal and PHP, sometimes used for spamming search
+ *         engines)
+ *   - 303 See Other
+ *   - 304 Not Modified
+ *   - 305 Use Proxy
+ *   - 307 Temporary Redirect (alternative to "503 Site Down for Maintenance")
+ *   Note: Other values are defined by RFC 2616, but are rarely used and poorly
+ *   supported.
+ * @see drupal_get_destination()
+ */
+function drupal_goto($path = '', $query = NULL, $fragment = NULL, $http_response_code = 302) {
+
+  if (isset($_REQUEST['destination'])) {
+    extract(parse_url(urldecode($_REQUEST['destination'])));
+  }
+  else if (isset($_REQUEST['edit']['destination'])) {
+    extract(parse_url(urldecode($_REQUEST['edit']['destination'])));
+  }
+
+  $url = url($path, array('query' => $query, 'fragment' => $fragment, 'absolute' => TRUE));
+  // Remove newlines from the URL to avoid header injection attacks.
+  $url = str_replace(array("\n", "\r"), '', $url);
+
+  // Allow modules to react to the end of the page request before redirecting.
+  // We do not want this while running update.php.
+  if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
+    module_invoke_all('exit', $url);
+  }
+
+  // Even though session_write_close() is registered as a shutdown function, we
+  // need all session data written to the database before redirecting.
+  session_write_close();
+
+  header('Location: '. $url, TRUE, $http_response_code);
+
+  // The "Location" header sends a redirect status code to the HTTP daemon. In
+  // some cases this can be wrong, so we make sure none of the code below the
+  // drupal_goto() call gets executed upon redirection.
+  exit();
+}
+
+/**
+ * Generates a site off-line message.
+ */
+function drupal_site_offline() {
+  drupal_maintenance_theme();
+  drupal_set_header('HTTP/1.1 503 Service unavailable');
+  drupal_set_title(t('Site off-line'));
+  print theme('maintenance_page', filter_xss_admin(variable_get('site_offline_message',
+    t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => variable_get('site_name', 'Drupal'))))));
+}
+
+/**
+ * Generates a 404 error if the request can not be handled.
+ */
+function drupal_not_found() {
+  drupal_set_header('HTTP/1.1 404 Not Found');
+
+  watchdog('page not found', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
+
+  $path = drupal_get_normal_path(variable_get('site_404', ''));
+  if ($path && $path != $_GET['q']) {
+    // Set the active item in case there are tabs to display, or other
+    // dependencies on the path.
+    menu_set_active_item($path);
+    $return = menu_execute_active_handler($path);
+  }
+
+  if (empty($return) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
+    drupal_set_title(t('Page not found'));
+    $return = t('The requested page could not be found.');
+  }
+
+  // To conserve CPU and bandwidth, omit the blocks.
+  print theme('page', $return, FALSE);
+}
+
+/**
+ * Generates a 403 error if the request is not allowed.
+ */
+function drupal_access_denied() {
+  drupal_set_header('HTTP/1.1 403 Forbidden');
+
+  watchdog('access denied', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
+
+  $path = drupal_get_normal_path(variable_get('site_403', ''));
+  if ($path && $path != $_GET['q']) {
+    // Set the active item in case there are tabs to display or other
+    // dependencies on the path.
+    menu_set_active_item($path);
+    $return = menu_execute_active_handler($path);
+  }
+
+  if (empty($return) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
+    drupal_set_title(t('Access denied'));
+    $return = t('You are not authorized to access this page.');
+  }
+  print theme('page', $return);
+}
+
+/**
+ * Perform an HTTP request.
+ *
+ * This is a flexible and powerful HTTP client implementation. Correctly handles
+ * GET, POST, PUT or any other HTTP requests. Handles redirects.
+ *
+ * @param $url
+ *   A string containing a fully qualified URI.
+ * @param $headers
+ *   An array containing an HTTP header => value pair.
+ * @param $method
+ *   A string defining the HTTP request to use.
+ * @param $data
+ *   A string containing data to include in the request.
+ * @param $retry
+ *   An integer representing how many times to retry the request in case of a
+ *   redirect.
+ * @return
+ *   An object containing the HTTP request headers, response code, headers,
+ *   data and redirect status.
+ */
+function drupal_http_request($url, $headers = array(), $method = 'GET', $data = NULL, $retry = 3) {
+  $result = new stdClass();
+
+  // Parse the URL and make sure we can handle the schema.
+  $uri = parse_url($url);
+
+  if ($uri == FALSE) {
+    $result->error = 'unable to parse URL';
+    return $result;
+  }
+
+  if (!isset($uri['scheme'])) {
+    $result->error = 'missing schema';
+    return $result;
+  }
+
+  switch ($uri['scheme']) {
+    case 'http':
+      $port = isset($uri['port']) ? $uri['port'] : 80;
+      $host = $uri['host'] . ($port != 80 ? ':'. $port : '');
+      $fp = @fsockopen($uri['host'], $port, $errno, $errstr, 15);
+      break;
+    case 'https':
+      // Note: Only works for PHP 4.3 compiled with OpenSSL.
+      $port = isset($uri['port']) ? $uri['port'] : 443;
+      $host = $uri['host'] . ($port != 443 ? ':'. $port : '');
+      $fp = @fsockopen('ssl://'. $uri['host'], $port, $errno, $errstr, 20);
+      break;
+    default:
+      $result->error = 'invalid schema '. $uri['scheme'];
+      return $result;
+  }
+
+  // Make sure the socket opened properly.
+  if (!$fp) {
+    // When a network error occurs, we use a negative number so it does not
+    // clash with the HTTP status codes.
+    $result->code = -$errno;
+    $result->error = trim($errstr);
+
+    // Mark that this request failed. This will trigger a check of the web
+    // server's ability to make outgoing HTTP requests the next time that
+    // requirements checking is performed.
+    // @see system_requirements()
+    variable_set('drupal_http_request_fails', TRUE);
+
+    return $result;
+  }
+
+  // Construct the path to act on.
+  $path = isset($uri['path']) ? $uri['path'] : '/';
+  if (isset($uri['query'])) {
+    $path .= '?'. $uri['query'];
+  }
+
+  // Create HTTP request.
+  $defaults = array(
+    // RFC 2616: "non-standard ports MUST, default ports MAY be included".
+    // We don't add the port to prevent from breaking rewrite rules checking the
+    // host that do not take into account the port number.
+    'Host' => "Host: $host",
+    'User-Agent' => 'User-Agent: Drupal (+http://drupal.org/)',
+    'Content-Length' => 'Content-Length: '. strlen($data)
+  );
+
+  // If the server url has a user then attempt to use basic authentication
+  if (isset($uri['user'])) {
+    $defaults['Authorization'] = 'Authorization: Basic '. base64_encode($uri['user'] . (!empty($uri['pass']) ? ":". $uri['pass'] : ''));
+  }
+
+  // If the database prefix is being used by SimpleTest to run the tests in a copied
+  // database then set the user-agent header to the database prefix so that any
+  // calls to other Drupal pages will run the SimpleTest prefixed database. The
+  // user-agent is used to ensure that multiple testing sessions running at the
+  // same time won't interfere with each other as they would if the database
+  // prefix were stored statically in a file or database variable.
+  if (preg_match("/simpletest\d+/", $GLOBALS['db_prefix'], $matches)) {
+    $defaults['User-Agent'] = 'User-Agent: ' . $matches[0];
+  }
+
+  foreach ($headers as $header => $value) {
+    $defaults[$header] = $header .': '. $value;
+  }
+
+  $request = $method .' '. $path ." HTTP/1.0\r\n";
+  $request .= implode("\r\n", $defaults);
+  $request .= "\r\n\r\n";
+  $request .= $data;
+
+  $result->request = $request;
+
+  fwrite($fp, $request);
+
+  // Fetch response.
+  $response = '';
+  while (!feof($fp) && $chunk = fread($fp, 1024)) {
+    $response .= $chunk;
+  }
+  fclose($fp);
+
+  // Parse response.
+  list($split, $result->data) = explode("\r\n\r\n", $response, 2);
+  $split = preg_split("/\r\n|\n|\r/", $split);
+
+  list($protocol, $code, $text) = explode(' ', trim(array_shift($split)), 3);
+  $result->headers = array();
+
+  // Parse headers.
+  while ($line = trim(array_shift($split))) {
+    list($header, $value) = explode(':', $line, 2);
+    if (isset($result->headers[$header]) && $header == 'Set-Cookie') {
+      // RFC 2109: the Set-Cookie response header comprises the token Set-
+      // Cookie:, followed by a comma-separated list of one or more cookies.
+      $result->headers[$header] .= ','. trim($value);
+    }
+    else {
+      $result->headers[$header] = trim($value);
+    }
+  }
+
+  $responses = array(
+    100 => 'Continue', 101 => 'Switching Protocols',
+    200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content',
+    300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect',
+    400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large', 415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable', 417 => 'Expectation Failed',
+    500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Time-out', 505 => 'HTTP Version not supported'
+  );
+  // RFC 2616 states that all unknown HTTP codes must be treated the same as the
+  // base code in their class.
+  if (!isset($responses[$code])) {
+    $code = floor($code / 100) * 100;
+  }
+
+  switch ($code) {
+    case 200: // OK
+    case 304: // Not modified
+      break;
+    case 301: // Moved permanently
+    case 302: // Moved temporarily
+    case 307: // Moved temporarily
+      $location = $result->headers['Location'];
+
+      if ($retry) {
+        $result = drupal_http_request($result->headers['Location'], $headers, $method, $data, --$retry);
+        $result->redirect_code = $result->code;
+      }
+      $result->redirect_url = $location;
+
+      break;
+    default:
+      $result->error = $text;
+  }
+
+  $result->code = $code;
+  return $result;
+}
+/**
+ * @} End of "HTTP handling".
+ */
+
+/**
+ * Log errors as defined by administrator.
+ *
+ * Error levels:
+ * - 0 = Log errors to database.
+ * - 1 = Log errors to database and to screen.
+ */
+function drupal_error_handler($errno, $message, $filename, $line, $context) {
+  // If the @ error suppression operator was used, error_reporting will have
+  // been temporarily set to 0.
+  if (error_reporting() == 0) {
+    return;
+  }
+
+  if ($errno & (E_ALL ^ E_NOTICE)) {
+    $types = array(1 => 'error', 2 => 'warning', 4 => 'parse error', 8 => 'notice', 16 => 'core error', 32 => 'core warning', 64 => 'compile error', 128 => 'compile warning', 256 => 'user error', 512 => 'user warning', 1024 => 'user notice', 2048 => 'strict warning', 4096 => 'recoverable fatal error');
+
+    // For database errors, we want the line number/file name of the place that
+    // the query was originally called, not _db_query().
+    if (isset($context[DB_ERROR])) {
+      $backtrace = array_reverse(debug_backtrace());
+
+      // List of functions where SQL queries can originate.
+      $query_functions = array('db_query', 'pager_query', 'db_query_range', 'db_query_temporary', 'update_sql');
+
+      // Determine where query function was called, and adjust line/file
+      // accordingly.
+      foreach ($backtrace as $index => $function) {
+        if (in_array($function['function'], $query_functions)) {
+          $line = $backtrace[$index]['line'];
+          $filename = $backtrace[$index]['file'];
+          break;
+        }
+      }
+    }
+
+    $entry = $types[$errno] .': '. $message .' in '. $filename .' on line '. $line .'.';
+
+    // Force display of error messages in update.php.
+    if (variable_get('error_level', 1) == 1 || strstr($_SERVER['SCRIPT_NAME'], 'update.php')) {
+      drupal_set_message($entry, 'error');
+    }
+
+    watchdog('php', '%message in %file on line %line.', array('%error' => $types[$errno], '%message' => $message, '%file' => $filename, '%line' => $line), WATCHDOG_ERROR);
+  }
+}
+
+function _fix_gpc_magic(&$item) {
+  if (is_array($item)) {
+    array_walk($item, '_fix_gpc_magic');
+  }
+  else {
+    $item = stripslashes($item);
+  }
+}
+
+/**
+ * Helper function to strip slashes from $_FILES skipping over the tmp_name keys
+ * since PHP generates single backslashes for file paths on Windows systems.
+ *
+ * tmp_name does not have backslashes added see
+ * http://php.net/manual/en/features.file-upload.php#42280
+ */
+function _fix_gpc_magic_files(&$item, $key) {
+  if ($key != 'tmp_name') {
+    if (is_array($item)) {
+      array_walk($item, '_fix_gpc_magic_files');
+    }
+    else {
+      $item = stripslashes($item);
+    }
+  }
+}
+
+/**
+ * Fix double-escaping problems caused by "magic quotes" in some PHP installations.
+ */
+function fix_gpc_magic() {
+  static $fixed = FALSE;
+  if (!$fixed && ini_get('magic_quotes_gpc')) {
+    array_walk($_GET, '_fix_gpc_magic');
+    array_walk($_POST, '_fix_gpc_magic');
+    array_walk($_COOKIE, '_fix_gpc_magic');
+    array_walk($_REQUEST, '_fix_gpc_magic');
+    array_walk($_FILES, '_fix_gpc_magic_files');
+    $fixed = TRUE;
+  }
+}
+
+/**
+ * Translate strings to the page language or a given language.
+ *
+ * Human-readable text that will be displayed somewhere within a page should
+ * be run through the t() function.
+ *
+ * Examples:
+ * @code
+ *   if (!$info || !$info['extension']) {
+ *     form_set_error('picture_upload', t('The uploaded file was not an image.'));
+ *   }
+ *
+ *   $form['submit'] = array(
+ *     '#type' => 'submit',
+ *     '#value' => t('Log in'),
+ *   );
+ * @endcode
+ *
+ * Any text within t() can be extracted by translators and changed into
+ * the equivalent text in their native language.
+ *
+ * Special variables called "placeholders" are used to signal dynamic
+ * information in a string which should not be translated. Placeholders
+ * can also be used for text that may change from time to time (such as
+ * link paths) to be changed without requiring updates to translations.
+ *
+ * For example:
+ * @code
+ *   $output = t('There are currently %members and %visitors online.', array(
+ *     '%members' => format_plural($total_users, '1 user', '@count users'),
+ *     '%visitors' => format_plural($guests->count, '1 guest', '@count guests')));
+ * @endcode
+ *
+ * There are three styles of placeholders:
+ * - !variable, which indicates that the text should be inserted as-is. This is
+ *   useful for inserting variables into things like e-mail.
+ *   @code
+ *     $message[] = t("If you don't want to receive such e-mails, you can change your settings at !url.", array('!url' => url("user/$account->uid", array('absolute' => TRUE))));
+ *   @endcode
+ *
+ * - @variable, which indicates that the text should be run through
+ *   check_plain, to escape HTML characters. Use this for any output that's
+ *   displayed within a Drupal page.
+ *   @code
+ *     drupal_set_title($title = t("@name's blog", array('@name' => $account->name)));
+ *   @endcode
+ *
+ * - %variable, which indicates that the string should be HTML escaped and
+ *   highlighted with theme_placeholder() which shows up by default as
+ *   <em>emphasized</em>.
+ *   @code
+ *     $message = t('%name-from sent %name-to an e-mail.', array('%name-from' => $user->name, '%name-to' => $account->name));
+ *   @endcode
+ *
+ * When using t(), try to put entire sentences and strings in one t() call.
+ * This makes it easier for translators, as it provides context as to what
+ * each word refers to. HTML markup within translation strings is allowed, but
+ * should be avoided if possible. The exception are embedded links; link
+ * titles add a context for translators, so should be kept in the main string.
+ *
+ * Here is an example of incorrect usage of t():
+ * @code
+ *   $output .= t('<p>Go to the @contact-page.</p>', array('@contact-page' => l(t('contact page'), 'contact')));
+ * @endcode
+ *
+ * Here is an example of t() used correctly:
+ * @code
+ *   $output .= '<p>'. t('Go to the <a href="@contact-page">contact page</a>.', array('@contact-page' => url('contact'))) .'</p>';
+ * @endcode
+ *
+ * Avoid escaping quotation marks wherever possible.
+ *
+ * Incorrect:
+ * @code
+ *   $output .= t('Don\'t click me.');
+ * @endcode
+ *
+ * Correct:
+ * @code
+ *   $output .= t("Don't click me.");
+ * @endcode
+ *
+ * Because t() is designed for handling code-based strings, in almost all
+ * cases, the actual string and not a variable must be passed through t().
+ *
+ * Extraction of translations is done based on the strings contained in t()
+ * calls. If a variable is passed through t(), the content of the variable
+ * cannot be extracted from the file for translation.
+ *
+ * Incorrect:
+ * @code
+ *   $message = 'An error occurred.';
+ *   drupal_set_message(t($message), 'error');
+ *   $output .= t($message);
+ * @endcode
+ *
+ * Correct:
+ * @code
+ *   $message = t('An error occurred.');
+ *   drupal_set_message($message, 'error');
+ *   $output .= $message;
+ * @endcode
+ *
+ * The only case in which variables can be passed safely through t() is when
+ * code-based versions of the same strings will be passed through t() (or
+ * otherwise extracted) elsewhere.
+ *
+ * In some cases, modules may include strings in code that can't use t()
+ * calls. For example, a module may use an external PHP application that
+ * produces strings that are loaded into variables in Drupal for output.
+ * In these cases, module authors may include a dummy file that passes the
+ * relevant strings through t(). This approach will allow the strings to be
+ * extracted.
+ *
+ * Sample external (non-Drupal) code:
+ * @code
+ *   class Time {
+ *     public $yesterday = 'Yesterday';
+ *     public $today = 'Today';
+ *     public $tomorrow = 'Tomorrow';
+ *   }
+ * @endcode
+ *
+ * Sample dummy file.
+ * @code
+ *   // Dummy function included in example.potx.inc.
+ *   function example_potx() {
+ *     $strings = array(
+ *       t('Yesterday'),
+ *       t('Today'),
+ *       t('Tomorrow'),
+ *     );
+ *     // No return value needed, since this is a dummy function.
+ *   }
+ * @endcode
+ *
+ * Having passed strings through t() in a dummy function, it is then
+ * okay to pass variables through t().
+ *
+ * Correct (if a dummy file was used):
+ * @code
+ *   $time = new Time();
+ *   $output .= t($time->today);
+ * @endcode
+ *
+ * However tempting it is, custom data from user input or other non-code
+ * sources should not be passed through t(). Doing so leads to the following
+ * problems and errors:
+ *  - The t() system doesn't support updates to existing strings. When user
+ *    data is updated, the next time it's passed through t() a new record is
+ *    created instead of an update. The database bloats over time and any
+ *    existing translations are orphaned with each update.
+ *  - The t() system assumes any data it receives is in English. User data may
+ *    be in another language, producing translation errors.
+ *  - The "Built-in interface" text group in the locale system is used to
+ *    produce translations for storage in .po files. When non-code strings are
+ *    passed through t(), they are added to this text group, which is rendered
+ *    inaccurate since it is a mix of actual interface strings and various user
+ *    input strings of uncertain origin.
+ *
+ * Incorrect:
+ * @code
+ *   $item = item_load();
+ *   $output .= check_plain(t($item['title']));
+ * @endcode
+ *
+ * Instead, translation of these data can be done through the locale system,
+ * either directly or through helper functions provided by contributed
+ * modules.
+ * @see hook_locale()
+ *
+ * During installation, st() is used in place of t(). Code that may be called
+ * during installation or during normal operation should use the get_t()
+ * helper function.
+ * @see st()
+ * @see get_t()
+ *
+ * @param $string
+ *   A string containing the English string to translate.
+ * @param $args
+ *   An associative array of replacements to make after translation. Incidences
+ *   of any key in this array are replaced with the corresponding value. Based
+ *   on the first character of the key, the value is escaped and/or themed:
+ *    - !variable: inserted as is
+ *    - @variable: escape plain text to HTML (check_plain)
+ *    - %variable: escape text and theme as a placeholder for user-submitted
+ *      content (check_plain + theme_placeholder)
+ * @param $langcode
+ *   Optional language code to translate to a language other than what is used
+ *   to display the page.
+ * @return
+ *   The translated string.
+ */
+function t($string, $args = array(), $langcode = NULL) {
+  global $language;
+  static $custom_strings;
+
+  $langcode = isset($langcode) ? $langcode : $language->language;
+
+  // First, check for an array of customized strings. If present, use the array
+  // *instead of* database lookups. This is a high performance way to provide a
+  // handful of string replacements. See settings.php for examples.
+  // Cache the $custom_strings variable to improve performance.
+  if (!isset($custom_strings[$langcode])) {
+    $custom_strings[$langcode] = variable_get('locale_custom_strings_'. $langcode, array());
+  }
+  // Custom strings work for English too, even if locale module is disabled.
+  if (isset($custom_strings[$langcode][$string])) {
+    $string = $custom_strings[$langcode][$string];
+  }
+  // Translate with locale module if enabled.
+  elseif (function_exists('locale') && $langcode != 'en') {
+    $string = locale($string, $langcode);
+  }
+  if (empty($args)) {
+    return $string;
+  }
+  else {
+    // Transform arguments before inserting them.
+    foreach ($args as $key => $value) {
+      switch ($key[0]) {
+        case '@':
+          // Escaped only.
+          $args[$key] = check_plain($value);
+          break;
+
+        case '%':
+        default:
+          // Escaped and placeholder.
+          $args[$key] = theme('placeholder', $value);
+          break;
+
+        case '!':
+          // Pass-through.
+      }
+    }
+    return strtr($string, $args);
+  }
+}
+
+/**
+ * @defgroup validation Input validation
+ * @{
+ * Functions to validate user input.
+ */
+
+/**
+ * Verify the syntax of the given e-mail address.
+ *
+ * Empty e-mail addresses are allowed. See RFC 2822 for details.
+ *
+ * @param $mail
+ *   A string containing an e-mail address.
+ * @return
+ *   TRUE if the address is in a valid format.
+ */
+function valid_email_address($mail) {
+  $user = '[a-zA-Z0-9_\-\.\+\^!#\$%&*+\/\=\?\`\|\{\}~\']+';
+  $domain = '(?:(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.?)+';
+  $ipv4 = '[0-9]{1,3}(\.[0-9]{1,3}){3}';
+  $ipv6 = '[0-9a-fA-F]{1,4}(\:[0-9a-fA-F]{1,4}){7}';
+
+  return preg_match("/^$user@($domain|(\[($ipv4|$ipv6)\]))$/", $mail);
+}
+
+/**
+ * Verify the syntax of the given URL.
+ *
+ * This function should only be used on actual URLs. It should not be used for
+ * Drupal menu paths, which can contain arbitrary characters.
+ * Valid values per RFC 3986.
+ *
+ * @param $url
+ *   The URL to verify.
+ * @param $absolute
+ *   Whether the URL is absolute (beginning with a scheme such as "http:").
+ * @return
+ *   TRUE if the URL is in a valid format.
+ */
+function valid_url($url, $absolute = FALSE) {
+  if ($absolute) {
+    return (bool)preg_match("
+      /^                                                      # Start at the beginning of the text
+      (?:ftp|https?):\/\/                                     # Look for ftp, http, or https schemes
+      (?:                                                     # Userinfo (optional) which is typically
+        (?:(?:[\w\.\-\+!$&'\(\)*\+,;=]|%[0-9a-f]{2})+:)*      # a username or a username and password
+        (?:[\w\.\-\+%!$&'\(\)*\+,;=]|%[0-9a-f]{2})+@          # combination
+      )?
+      (?:
+        (?:[a-z0-9\-\.]|%[0-9a-f]{2})+                        # A domain name or a IPv4 address
+        |(?:\[(?:[0-9a-f]{0,4}:)*(?:[0-9a-f]{0,4})\])         # or a well formed IPv6 address
+      )
+      (?::[0-9]+)?                                            # Server port number (optional)
+      (?:[\/|\?]
+        (?:[\w#!:\.\?\+=&@$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2})   # The path and query (optional)
+      *)?
+    $/xi", $url);
+  }
+  else {
+    return (bool)preg_match("/^(?:[\w#!:\.\?\+=&@$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2})+$/i", $url);
+  }
+}
+
+
+/**
+ * @} End of "defgroup validation".
+ */
+
+/**
+ * Register an event for the current visitor (hostname/IP) to the flood control mechanism.
+ *
+ * @param $name
+ *   The name of an event.
+ */
+function flood_register_event($name) {
+  db_query("INSERT INTO {flood} (event, hostname, timestamp) VALUES ('%s', '%s', %d)", $name, ip_address(), time());
+}
+
+/**
+ * Check if the current visitor (hostname/IP) is allowed to proceed with the specified event.
+ *
+ * The user is allowed to proceed if he did not trigger the specified event more
+ * than $threshold times per hour.
+ *
+ * @param $name
+ *   The name of the event.
+ * @param $number
+ *   The maximum number of the specified event per hour (per visitor).
+ * @return
+ *   True if the user did not exceed the hourly threshold. False otherwise.
+ */
+function flood_is_allowed($name, $threshold) {
+  $number = db_result(db_query("SELECT COUNT(*) FROM {flood} WHERE event = '%s' AND hostname = '%s' AND timestamp > %d", $name, ip_address(), time() - 3600));
+  return ($number < $threshold ? TRUE : FALSE);
+}
+
+function check_file($filename) {
+  return is_uploaded_file($filename);
+}
+
+/**
+ * Prepare a URL for use in an HTML attribute. Strips harmful protocols.
+ */
+function check_url($uri) {
+  return filter_xss_bad_protocol($uri, FALSE);
+}
+
+/**
+ * @defgroup format Formatting
+ * @{
+ * Functions to format numbers, strings, dates, etc.
+ */
+
+/**
+ * Formats an RSS channel.
+ *
+ * Arbitrary elements may be added using the $args associative array.
+ */
+function format_rss_channel($title, $link, $description, $items, $langcode = NULL, $args = array()) {
+  global $language;
+  $langcode = $langcode ? $langcode : $language->language;
+
+  $output = "<channel>\n";
+  $output .= ' <title>'. check_plain($title) ."</title>\n";
+  $output .= ' <link>'. check_url($link) ."</link>\n";
+
+  // The RSS 2.0 "spec" doesn't indicate HTML can be used in the description.
+  // We strip all HTML tags, but need to prevent double encoding from properly
+  // escaped source data (such as &amp becoming &amp;amp;).
+  $output .= ' <description>'. check_plain(decode_entities(strip_tags($description))) ."</description>\n";
+  $output .= ' <language>'. check_plain($langcode) ."</language>\n";
+  $output .= format_xml_elements($args);
+  $output .= $items;
+  $output .= "</channel>\n";
+
+  return $output;
+}
+
+/**
+ * Format a single RSS item.
+ *
+ * Arbitrary elements may be added using the $args associative array.
+ */
+function format_rss_item($title, $link, $description, $args = array()) {
+  $output = "<item>\n";
+  $output .= ' <title>'. check_plain($title) ."</title>\n";
+  $output .= ' <link>'. check_url($link) ."</link>\n";
+  $output .= ' <description>'. check_plain($description) ."</description>\n";
+  $output .= format_xml_elements($args);
+  $output .= "</item>\n";
+
+  return $output;
+}
+
+/**
+ * Format XML elements.
+ *
+ * @param $array
+ *   An array where each item represent an element and is either a:
+ *   - (key => value) pair (<key>value</key>)
+ *   - Associative array with fields:
+ *     - 'key': element name
+ *     - 'value': element contents
+ *     - 'attributes': associative array of element attributes
+ *
+ * In both cases, 'value' can be a simple string, or it can be another array
+ * with the same format as $array itself for nesting.
+ */
+function format_xml_elements($array) {
+  $output = '';
+  foreach ($array as $key => $value) {
+    if (is_numeric($key)) {
+      if ($value['key']) {
+        $output .= ' <'. $value['key'];
+        if (isset($value['attributes']) && is_array($value['attributes'])) {
+          $output .= drupal_attributes($value['attributes']);
+        }
+
+        if ($value['value'] != '') {
+          $output .= '>'. (is_array($value['value']) ? format_xml_elements($value['value']) : check_plain($value['value'])) .'</'. $value['key'] .">\n";
+        }
+        else {
+          $output .= " />\n";
+        }
+      }
+    }
+    else {
+      $output .= ' <'. $key .'>'. (is_array($value) ? format_xml_elements($value) : check_plain($value)) ."</$key>\n";
+    }
+  }
+  return $output;
+}
+
+/**
+ * Format a string containing a count of items.
+ *
+ * This function ensures that the string is pluralized correctly. Since t() is
+ * called by this function, make sure not to pass already-localized strings to
+ * it.
+ *
+ * For example:
+ * @code
+ *   $output = format_plural($node->comment_count, '1 comment', '@count comments');
+ * @endcode
+ *
+ * Example with additional replacements:
+ * @code
+ *   $output = format_plural($update_count,
+ *     'Changed the content type of 1 post from %old-type to %new-type.',
+ *     'Changed the content type of @count posts from %old-type to %new-type.',
+ *     array('%old-type' => $info->old_type, '%new-type' => $info->new_type)));
+ * @endcode
+ *
+ * @param $count
+ *   The item count to display.
+ * @param $singular
+ *   The string for the singular case. Please make sure it is clear this is
+ *   singular, to ease translation (e.g. use "1 new comment" instead of "1 new").
+ *   Do not use @count in the singular string.
+ * @param $plural
+ *   The string for the plural case. Please make sure it is clear this is plural,
+ *   to ease translation. Use @count in place of the item count, as in "@count
+ *   new comments".
+ * @param $args
+ *   An associative array of replacements to make after translation. Incidences
+ *   of any key in this array are replaced with the corresponding value.
+ *   Based on the first character of the key, the value is escaped and/or themed:
+ *    - !variable: inserted as is
+ *    - @variable: escape plain text to HTML (check_plain)
+ *    - %variable: escape text and theme as a placeholder for user-submitted
+ *      content (check_plain + theme_placeholder)
+ *   Note that you do not need to include @count in this array.
+ *   This replacement is done automatically for the plural case.
+ * @param $langcode
+ *   Optional language code to translate to a language other than
+ *   what is used to display the page.
+ * @return
+ *   A translated string.
+ */
+function format_plural($count, $singular, $plural, $args = array(), $langcode = NULL) {
+  $args['@count'] = $count;
+  if ($count == 1) {
+    return t($singular, $args, $langcode);
+  }
+
+  // Get the plural index through the gettext formula.
+  $index = (function_exists('locale_get_plural')) ? locale_get_plural($count, $langcode) : -1;
+  // Backwards compatibility.
+  if ($index < 0) {
+    return t($plural, $args, $langcode);
+  }
+  else {
+    switch ($index) {
+      case "0":
+        return t($singular, $args, $langcode);
+      case "1":
+        return t($plural, $args, $langcode);
+      default:
+        unset($args['@count']);
+        $args['@count['. $index .']'] = $count;
+        return t(strtr($plural, array('@count' => '@count['. $index .']')), $args, $langcode);
+    }
+  }
+}
+
+/**
+ * Parse a given byte count.
+ *
+ * @param $size
+ *   A size expressed as a number of bytes with optional SI size and unit
+ *   suffix (e.g. 2, 3K, 5MB, 10G).
+ * @return
+ *   An integer representation of the size.
+ */
+function parse_size($size) {
+  $suffixes = array(
+    '' => 1,
+    'k' => 1024,
+    'm' => 1048576, // 1024 * 1024
+    'g' => 1073741824, // 1024 * 1024 * 1024
+  );
+  if (preg_match('/([0-9]+)\s*(k|m|g)?(b?(ytes?)?)/i', $size, $match)) {
+    return $match[1] * $suffixes[drupal_strtolower($match[2])];
+  }
+}
+
+/**
+ * Generate a string representation for the given byte count.
+ *
+ * @param $size
+ *   A size in bytes.
+ * @param $langcode
+ *   Optional language code to translate to a language other than what is used
+ *   to display the page.
+ * @return
+ *   A translated string representation of the size.
+ */
+function format_size($size, $langcode = NULL) {
+  if ($size < 1024) {
+    return format_plural($size, '1 byte', '@count bytes', array(), $langcode);
+  }
+  else {
+    $size = round($size / 1024, 2);
+    $suffix = t('KB', array(), $langcode);
+    if ($size >= 1024) {
+      $size = round($size / 1024, 2);
+      $suffix = t('MB', array(), $langcode);
+    }
+    return t('@size @suffix', array('@size' => $size, '@suffix' => $suffix), $langcode);
+  }
+}
+
+/**
+ * Format a time interval with the requested granularity.
+ *
+ * @param $timestamp
+ *   The length of the interval in seconds.
+ * @param $granularity
+ *   How many different units to display in the string.
+ * @param $langcode
+ *   Optional language code to translate to a language other than
+ *   what is used to display the page.
+ * @return
+ *   A translated string representation of the interval.
+ */
+function format_interval($timestamp, $granularity = 2, $langcode = NULL) {
+  $units = array('1 year|@count years' => 31536000, '1 week|@count weeks' => 604800, '1 day|@count days' => 86400, '1 hour|@count hours' => 3600, '1 min|@count min' => 60, '1 sec|@count sec' => 1);
+  $output = '';
+  foreach ($units as $key => $value) {
+    $key = explode('|', $key);
+    if ($timestamp >= $value) {
+      $output .= ($output ? ' ' : '') . format_plural(floor($timestamp / $value), $key[0], $key[1], array(), $langcode);
+      $timestamp %= $value;
+      $granularity--;
+    }
+
+    if ($granularity == 0) {
+      break;
+    }
+  }
+  return $output ? $output : t('0 sec', array(), $langcode);
+}
+
+/**
+ * Format a date with the given configured format or a custom format string.
+ *
+ * Drupal allows administrators to select formatting strings for 'small',
+ * 'medium' and 'large' date formats. This function can handle these formats,
+ * as well as any custom format.
+ *
+ * @param $timestamp
+ *   The exact date to format, as a UNIX timestamp.
+ * @param $type
+ *   The format to use. Can be "small", "medium" or "large" for the preconfigured
+ *   date formats. If "custom" is specified, then $format is required as well.
+ * @param $format
+ *   A PHP date format string as required by date(). A backslash should be used
+ *   before a character to avoid interpreting the character as part of a date
+ *   format.
+ * @param $timezone
+ *   Time zone offset in seconds; if omitted, the user's time zone is used.
+ * @param $langcode
+ *   Optional language code to translate to a language other than what is used
+ *   to display the page.
+ * @return
+ *   A translated date string in the requested format.
+ */
+function format_date($timestamp, $type = 'medium', $format = '', $timezone = NULL, $langcode = NULL) {
+  if (!isset($timezone)) {
+    global $user;
+    if (variable_get('configurable_timezones', 1) && $user->uid && strlen($user->timezone)) {
+      $timezone = $user->timezone;
+    }
+    else {
+      $timezone = variable_get('date_default_timezone', 0);
+    }
+  }
+
+  $timestamp += $timezone;
+
+  switch ($type) {
+    case 'small':
+      $format = variable_get('date_format_short', 'm/d/Y - H:i');
+      break;
+    case 'large':
+      $format = variable_get('date_format_long', 'l, F j, Y - H:i');
+      break;
+    case 'custom':
+      // No change to format.
+      break;
+    case 'medium':
+    default:
+      $format = variable_get('date_format_medium', 'D, m/d/Y - H:i');
+  }
+
+  $max = strlen($format);
+  $date = '';
+  for ($i = 0; $i < $max; $i++) {
+    $c = $format[$i];
+    if (strpos('AaDlM', $c) !== FALSE) {
+      $date .= t(gmdate($c, $timestamp), array(), $langcode);
+    }
+    else if ($c == 'F') {
+      // Special treatment for long month names: May is both an abbreviation
+      // and a full month name in English, but other languages have
+      // different abbreviations.
+      $date .= trim(t('!long-month-name '. gmdate($c, $timestamp), array('!long-month-name' => ''), $langcode));
+    }
+    else if (strpos('BdgGhHiIjLmnsStTUwWYyz', $c) !== FALSE) {
+      $date .= gmdate($c, $timestamp);
+    }
+    else if ($c == 'r') {
+      $date .= format_date($timestamp - $timezone, 'custom', 'D, d M Y H:i:s O', $timezone, $langcode);
+    }
+    else if ($c == 'O') {
+      $date .= sprintf('%s%02d%02d', ($timezone < 0 ? '-' : '+'), abs($timezone / 3600), abs($timezone % 3600) / 60);
+    }
+    else if ($c == 'Z') {
+      $date .= $timezone;
+    }
+    else if ($c == '\\') {
+      $date .= $format[++$i];
+    }
+    else {
+      $date .= $c;
+    }
+  }
+
+  return $date;
+}
+
+/**
+ * @} End of "defgroup format".
+ */
+
+/**
+ * Generate a URL from a Drupal menu path. Will also pass-through existing URLs.
+ *
+ * @param $path
+ *   The Drupal path being linked to, such as "admin/content/node", or an
+ *   existing URL like "http://drupal.org/".  The special path
+ *   '<front>' may also be given and will generate the site's base URL.
+ * @param $options
+ *   An associative array of additional options, with the following keys:
+ *   - 'query'
+ *       A query string to append to the link, or an array of query key/value
+ *       properties.
+ *   - 'fragment'
+ *       A fragment identifier (or named anchor) to append to the link.
+ *       Do not include the '#' character.
+ *   - 'absolute' (default FALSE)
+ *       Whether to force the output to be an absolute link (beginning with
+ *       http:). Useful for links that will be displayed outside the site, such
+ *       as in an RSS feed.
+ *   - 'alias' (default FALSE)
+ *       Whether the given path is an alias already.
+ *   - 'external'
+ *       Whether the given path is an external URL.
+ *   - 'language'
+ *       An optional language object. Used to build the URL to link to and
+ *       look up the proper alias for the link.
+ *   - 'base_url'
+ *       Only used internally, to modify the base URL when a language dependent
+ *       URL requires so.
+ *   - 'prefix'
+ *       Only used internally, to modify the path when a language dependent URL
+ *       requires so.
+ * @return
+ *   A string containing a URL to the given path.
+ *
+ * When creating links in modules, consider whether l() could be a better
+ * alternative than url().
+ */
+function url($path = NULL, $options = array()) {
+  // Merge in defaults.
+  $options += array(
+    'fragment' => '',
+    'query' => '',
+    'absolute' => FALSE,
+    'alias' => FALSE,
+    'prefix' => ''
+  );
+  if (!isset($options['external'])) {
+    // Return an external link if $path contains an allowed absolute URL.
+    // Only call the slow filter_xss_bad_protocol if $path contains a ':' before
+    // any / ? or #.
+    $colonpos = strpos($path, ':');
+    $options['external'] = ($colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && filter_xss_bad_protocol($path, FALSE) == check_plain($path));
+  }
+
+  // May need language dependent rewriting if language.inc is present.
+  if (function_exists('language_url_rewrite')) {
+    language_url_rewrite($path, $options);
+  }
+  if ($options['fragment']) {
+    $options['fragment'] = '#'. $options['fragment'];
+  }
+  if (is_array($options['query'])) {
+    $options['query'] = drupal_query_string_encode($options['query']);
+  }
+
+  if ($options['external']) {
+    // Split off the fragment.
+    if (strpos($path, '#') !== FALSE) {
+      list($path, $old_fragment) = explode('#', $path, 2);
+      if (isset($old_fragment) && !$options['fragment']) {
+        $options['fragment'] = '#'. $old_fragment;
+      }
+    }
+    // Append the query.
+    if ($options['query']) {
+      $path .= (strpos($path, '?') !== FALSE ? '&' : '?') . $options['query'];
+    }
+    // Reassemble.
+    return $path . $options['fragment'];
+  }
+
+  global $base_url;
+  static $script;
+
+  if (!isset($script)) {
+    // On some web servers, such as IIS, we can't omit "index.php". So, we
+    // generate "index.php?q=foo" instead of "?q=foo" on anything that is not
+    // Apache.
+    $script = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') === FALSE) ? 'index.php' : '';
+  }
+
+  if (!isset($options['base_url'])) {
+    // The base_url might be rewritten from the language rewrite in domain mode.
+    $options['base_url'] = $base_url;
+  }
+
+  // Preserve the original path before aliasing.
+  $original_path = $path;
+
+  // The special path '<front>' links to the default front page.
+  if ($path == '<front>') {
+    $path = '';
+  }
+  elseif (!empty($path) && !$options['alias']) {
+    $path = drupal_get_path_alias($path, isset($options['language']) ? $options['language']->language : '');
+  }
+
+  if (function_exists('custom_url_rewrite_outbound')) {
+    // Modules may alter outbound links by reference.
+    custom_url_rewrite_outbound($path, $options, $original_path);
+  }
+
+  $base = $options['absolute'] ? $options['base_url'] .'/' : base_path();
+  $prefix = empty($path) ? rtrim($options['prefix'], '/') : $options['prefix'];
+  $path = drupal_urlencode($prefix . $path);
+
+  if (variable_get('clean_url', '0')) {
+    // With Clean URLs.
+    if ($options['query']) {
+      return $base . $path .'?'. $options['query'] . $options['fragment'];
+    }
+    else {
+      return $base . $path . $options['fragment'];
+    }
+  }
+  else {
+    // Without Clean URLs.
+    $variables = array();
+    if (!empty($path)) {
+      $variables[] = 'q='. $path;
+    }
+    if (!empty($options['query'])) {
+      $variables[] = $options['query'];
+    }
+    if ($query = join('&', $variables)) {
+      return $base . $script .'?'. $query . $options['fragment'];
+    }
+    else {
+      return $base . $options['fragment'];
+    }
+  }
+}
+
+/**
+ * Format an attribute string to insert in a tag.
+ *
+ * @param $attributes
+ *   An associative array of HTML attributes.
+ * @return
+ *   An HTML string ready for insertion in a tag.
+ */
+function drupal_attributes($attributes = array()) {
+  if (is_array($attributes)) {
+    $t = '';
+    foreach ($attributes as $key => $value) {
+      $t .= " $key=".'"'. check_plain($value) .'"';
+    }
+    return $t;
+  }
+}
+
+/**
+ * Format an internal Drupal link.
+ *
+ * This function correctly handles aliased paths, and allows themes to highlight
+ * links to the current page correctly, so all internal links output by modules
+ * should be generated by this function if possible.
+ *
+ * @param $text
+ *   The text to be enclosed with the anchor tag.
+ * @param $path
+ *   The Drupal path being linked to, such as "admin/content/node". Can be an
+ *   external or internal URL.
+ *     - If you provide the full URL, it will be considered an external URL.
+ *     - If you provide only the path (e.g. "admin/content/node"), it is
+ *       considered an internal link. In this case, it must be a system URL
+ *       as the url() function will generate the alias.
+ *     - If you provide '<front>', it generates a link to the site's
+ *       base URL (again via the url() function).
+ *     - If you provide a path, and 'alias' is set to TRUE (see below), it is
+ *       used as is.
+ * @param $options
+ *   An associative array of additional options, with the following keys:
+ *     - 'attributes'
+ *       An associative array of HTML attributes to apply to the anchor tag.
+ *     - 'query'
+ *       A query string to append to the link, or an array of query key/value
+ *       properties.
+ *     - 'fragment'
+ *       A fragment identifier (named anchor) to append to the link.
+ *       Do not include the '#' character.
+ *     - 'absolute' (default FALSE)
+ *       Whether to force the output to be an absolute link (beginning with
+ *       http:). Useful for links that will be displayed outside the site, such
+ *       as in an RSS feed.
+ *     - 'html' (default FALSE)
+ *       Whether the title is HTML, or just plain-text. For example for making
+ *       an image a link, this must be set to TRUE, or else you will see the
+ *       escaped HTML.
+ *     - 'alias' (default FALSE)
+ *       Whether the given path is an alias already.
+ * @return
+ *   an HTML string containing a link to the given path.
+ */
+function l($text, $path, $options = array()) {
+  global $language;
+
+  // Merge in defaults.
+  $options += array(
+      'attributes' => array(),
+      'html' => FALSE,
+    );
+
+  // Append active class.
+  if (($path == $_GET['q'] || ($path == '<front>' && drupal_is_front_page())) &&
+      (empty($options['language']) || $options['language']->language == $language->language)) {
+    if (isset($options['attributes']['class'])) {
+      $options['attributes']['class'] .= ' active';
+    }
+    else {
+      $options['attributes']['class'] = 'active';
+    }
+  }
+
+  // Remove all HTML and PHP tags from a tooltip. For best performance, we act only
+  // if a quick strpos() pre-check gave a suspicion (because strip_tags() is expensive).
+  if (isset($options['attributes']['title']) && strpos($options['attributes']['title'], '<') !== FALSE) {
+    $options['attributes']['title'] = strip_tags($options['attributes']['title']);
+  }
+
+  return '<a href="'. check_url(url($path, $options)) .'"'. drupal_attributes($options['attributes']) .'>'. ($options['html'] ? $text : check_plain($text)) .'</a>';
+}
+
+/**
+ * Perform end-of-request tasks.
+ *
+ * This function sets the page cache if appropriate, and allows modules to
+ * react to the closing of the page by calling hook_exit().
+ */
+function drupal_page_footer() {
+  if (variable_get('cache', CACHE_DISABLED) != CACHE_DISABLED) {
+    page_set_cache();
+  }
+
+  module_invoke_all('exit');
+}
+
+/**
+ * Form an associative array from a linear array.
+ *
+ * This function walks through the provided array and constructs an associative
+ * array out of it. The keys of the resulting array will be the values of the
+ * input array. The values will be the same as the keys unless a function is
+ * specified, in which case the output of the function is used for the values
+ * instead.
+ *
+ * @param $array
+ *   A linear array.
+ * @param $function
+ *   A name of a function to apply to all values before output.
+ * @result
+ *   An associative array.
+ */
+function drupal_map_assoc($array, $function = NULL) {
+  if (!isset($function)) {
+    $result = array();
+    foreach ($array as $value) {
+      $result[$value] = $value;
+    }
+    return $result;
+  }
+  elseif (function_exists($function)) {
+    $result = array();
+    foreach ($array as $value) {
+      $result[$value] = $function($value);
+    }
+    return $result;
+  }
+}
+
+/**
+ * Evaluate a string of PHP code.
+ *
+ * This is a wrapper around PHP's eval(). It uses output buffering to capture both
+ * returned and printed text. Unlike eval(), we require code to be surrounded by
+ * <?php ?> tags; in other words, we evaluate the code as if it were a stand-alone
+ * PHP file.
+ *
+ * Using this wrapper also ensures that the PHP code which is evaluated can not
+ * overwrite any variables in the calling code, unlike a regular eval() call.
+ *
+ * @param $code
+ *   The code to evaluate.
+ * @return
+ *   A string containing the printed output of the code, followed by the returned
+ *   output of the code.
+ */
+function drupal_eval($code) {
+  global $theme_path, $theme_info, $conf;
+
+  // Store current theme path.
+  $old_theme_path = $theme_path;
+
+  // Restore theme_path to the theme, as long as drupal_eval() executes,
+  // so code evaluted will not see the caller module as the current theme.
+  // If theme info is not initialized get the path from theme_default.
+  if (!isset($theme_info)) {
+    $theme_path = drupal_get_path('theme', $conf['theme_default']);
+  }
+  else {
+    $theme_path = dirname($theme_info->filename);
+  }
+
+  ob_start();
+  print eval('?>'. $code);
+  $output = ob_get_contents();
+  ob_end_clean();
+
+  // Recover original theme path.
+  $theme_path = $old_theme_path;
+
+  return $output;
+}
+
+/**
+ * Returns the path to a system item (module, theme, etc.).
+ *
+ * @param $type
+ *   The type of the item (i.e. theme, theme_engine, module).
+ * @param $name
+ *   The name of the item for which the path is requested.
+ *
+ * @return
+ *   The path to the requested item.
+ */
+function drupal_get_path($type, $name) {
+  return dirname(drupal_get_filename($type, $name));
+}
+
+/**
+ * Returns the base URL path of the Drupal installation.
+ * At the very least, this will always default to /.
+ */
+function base_path() {
+  return $GLOBALS['base_path'];
+}
+
+/**
+ * Provide a substitute clone() function for PHP4.
+ */
+function drupal_clone($object) {
+  return version_compare(phpversion(), '5.0') < 0 ? $object : clone($object);
+}
+
+/**
+ * Add a <link> tag to the page's HEAD.
+ */
+function drupal_add_link($attributes) {
+  drupal_set_html_head('<link'. drupal_attributes($attributes) ." />\n");
+}
+
+/**
+ * Adds a CSS file to the stylesheet queue.
+ *
+ * @param $path
+ *   (optional) The path to the CSS file relative to the base_path(), e.g.,
+ *   /modules/devel/devel.css.
+ *
+ *   Modules should always prefix the names of their CSS files with the module
+ *   name, for example: system-menus.css rather than simply menus.css. Themes
+ *   can override module-supplied CSS files based on their filenames, and this
+ *   prefixing helps prevent confusing name collisions for theme developers.
+ *   See drupal_get_css where the overrides are performed.
+ *
+ *   If the direction of the current language is right-to-left (Hebrew,
+ *   Arabic, etc.), the function will also look for an RTL CSS file and append
+ *   it to the list. The name of this file should have an '-rtl.css' suffix.
+ *   For example a CSS file called 'name.css' will have a 'name-rtl.css'
+ *   file added to the list, if exists in the same directory. This CSS file
+ *   should contain overrides for properties which should be reversed or
+ *   otherwise different in a right-to-left display.
+ * @param $type
+ *   (optional) The type of stylesheet that is being added. Types are: module
+ *   or theme.
+ * @param $media
+ *   (optional) The media type for the stylesheet, e.g., all, print, screen.
+ * @param $preprocess
+ *   (optional) Should this CSS file be aggregated and compressed if this
+ *   feature has been turned on under the performance section?
+ *
+ *   What does this actually mean?
+ *   CSS preprocessing is the process of aggregating a bunch of separate CSS
+ *   files into one file that is then compressed by removing all extraneous
+ *   white space.
+ *
+ *   The reason for merging the CSS files is outlined quite thoroughly here:
+ *   http://www.die.net/musings/page_load_time/
+ *   "Load fewer external objects. Due to request overhead, one bigger file
+ *   just loads faster than two smaller ones half its size."
+ *
+ *   However, you should *not* preprocess every file as this can lead to
+ *   redundant caches. You should set $preprocess = FALSE when:
+ *
+ *     - Your styles are only used rarely on the site. This could be a special
+ *       admin page, the homepage, or a handful of pages that does not represent
+ *       the majority of the pages on your site.
+ *
+ *   Typical candidates for caching are for example styles for nodes across
+ *   the site, or used in the theme.
+ * @return
+ *   An array of CSS files.
+ */
+function drupal_add_css($path = NULL, $type = 'module', $media = 'all', $preprocess = TRUE) {
+  static $css = array();
+  global $language;
+
+  // Create an array of CSS files for each media type first, since each type needs to be served
+  // to the browser differently.
+  if (isset($path)) {
+    // This check is necessary to ensure proper cascading of styles and is faster than an asort().
+    if (!isset($css[$media])) {
+      $css[$media] = array('module' => array(), 'theme' => array());
+    }
+    $css[$media][$type][$path] = $preprocess;
+
+    // If the current language is RTL, add the CSS file with RTL overrides.
+    if ($language->direction == LANGUAGE_RTL) {
+      $rtl_path = str_replace('.css', '-rtl.css', $path);
+      if (file_exists($rtl_path)) {
+        $css[$media][$type][$rtl_path] = $preprocess;
+      }
+    }
+  }
+
+  return $css;
+}
+
+/**
+ * Returns a themed representation of all stylesheets that should be attached to the page.
+ *
+ * It loads the CSS in order, with 'module' first, then 'theme' afterwards.
+ * This ensures proper cascading of styles so themes can easily override
+ * module styles through CSS selectors.
+ *
+ * Themes may replace module-defined CSS files by adding a stylesheet with the
+ * same filename. For example, themes/garland/system-menus.css would replace
+ * modules/system/system-menus.css. This allows themes to override complete
+ * CSS files, rather than specific selectors, when necessary.
+ *
+ * If the original CSS file is being overridden by a theme, the theme is
+ * responsible for supplying an accompanying RTL CSS file to replace the
+ * module's.
+ *
+ * @param $css
+ *   (optional) An array of CSS files. If no array is provided, the default
+ *   stylesheets array is used instead.
+ * @return
+ *   A string of XHTML CSS tags.
+ */
+function drupal_get_css($css = NULL) {
+  $output = '';
+  if (!isset($css)) {
+    $css = drupal_add_css();
+  }
+  $no_module_preprocess = '';
+  $no_theme_preprocess = '';
+
+  $preprocess_css = (variable_get('preprocess_css', FALSE) && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update'));
+  $directory = file_directory_path();
+  $is_writable = is_dir($directory) && is_writable($directory) && (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) == FILE_DOWNLOADS_PUBLIC);
+
+  // A dummy query-string is added to filenames, to gain control over
+  // browser-caching. The string changes on every update or full cache
+  // flush, forcing browsers to load a new copy of the files, as the
+  // URL changed.
+  $query_string = '?'. substr(variable_get('css_js_query_string', '0'), 0, 1);
+
+  foreach ($css as $media => $types) {
+    // If CSS preprocessing is off, we still need to output the styles.
+    // Additionally, go through any remaining styles if CSS preprocessing is on and output the non-cached ones.
+    foreach ($types as $type => $files) {
+      if ($type == 'module') {
+        // Setup theme overrides for module styles.
+        $theme_styles = array();
+        foreach (array_keys($css[$media]['theme']) as $theme_style) {
+          $theme_styles[] = basename($theme_style);
+        }
+      }
+      foreach ($types[$type] as $file => $preprocess) {
+        // If the theme supplies its own style using the name of the module style, skip its inclusion.
+        // This includes any RTL styles associated with its main LTR counterpart.
+        if ($type == 'module' && in_array(str_replace('-rtl.css', '.css', basename($file)), $theme_styles)) {
+          // Unset the file to prevent its inclusion when CSS aggregation is enabled.
+          unset($types[$type][$file]);
+          continue;
+        }
+        // Only include the stylesheet if it exists.
+        if (file_exists($file)) {
+          if (!$preprocess || !($is_writable && $preprocess_css)) {
+            // If a CSS file is not to be preprocessed and it's a module CSS file, it needs to *always* appear at the *top*,
+            // regardless of whether preprocessing is on or off.
+            if (!$preprocess && $type == 'module') {
+              $no_module_preprocess .= '<link type="text/css" rel="stylesheet" media="'. $media .'" href="'. base_path() . $file . $query_string .'" />'."\n";
+            }
+            // If a CSS file is not to be preprocessed and it's a theme CSS file, it needs to *always* appear at the *bottom*,
+            // regardless of whether preprocessing is on or off.
+            else if (!$preprocess && $type == 'theme') {
+              $no_theme_preprocess .= '<link type="text/css" rel="stylesheet" media="'. $media .'" href="'. base_path() . $file . $query_string .'" />'."\n";
+            }
+            else {
+              $output .= '<link type="text/css" rel="stylesheet" media="'. $media .'" href="'. base_path() . $file . $query_string .'" />'."\n";
+            }
+          }
+        }
+      }
+    }
+
+    if ($is_writable && $preprocess_css) {
+      // Prefix filename to prevent blocking by firewalls which reject files
+      // starting with "ad*".
+      $filename = 'css_'. md5(serialize($types) . $query_string) .'.css';
+      $preprocess_file = drupal_build_css_cache($types, $filename);
+      $output .= '<link type="text/css" rel="stylesheet" media="'. $media .'" href="'. base_path() . $preprocess_file .'" />'."\n";
+    }
+  }
+
+  return $no_module_preprocess . $output . $no_theme_preprocess;
+}
+
+/**
+ * Aggregate and optimize CSS files, putting them in the files directory.
+ *
+ * @param $types
+ *   An array of types of CSS files (e.g., screen, print) to aggregate and
+ *   compress into one file.
+ * @param $filename
+ *   The name of the aggregate CSS file.
+ * @return
+ *   The name of the CSS file.
+ */
+function drupal_build_css_cache($types, $filename) {
+  $data = '';
+
+  // Create the css/ within the files folder.
+  $csspath = file_create_path('css');
+  file_check_directory($csspath, FILE_CREATE_DIRECTORY);
+
+  if (!file_exists($csspath .'/'. $filename)) {
+    // Build aggregate CSS file.
+    foreach ($types as $type) {
+      foreach ($type as $file => $cache) {
+        if ($cache) {
+          $contents = drupal_load_stylesheet($file, TRUE);
+          // Return the path to where this CSS file originated from.
+          $base = base_path() . dirname($file) .'/';
+          _drupal_build_css_path(NULL, $base);
+          // Prefix all paths within this CSS file, ignoring external and absolute paths.
+          $data .= preg_replace_callback('/url\([\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\)/i', '_drupal_build_css_path', $contents);
+        }
+      }
+    }
+
+    // Per the W3C specification at http://www.w3.org/TR/REC-CSS2/cascade.html#at-import,
+    // @import rules must proceed any other style, so we move those to the top.
+    $regexp = '/@import[^;]+;/i';
+    preg_match_all($regexp, $data, $matches);
+    $data = preg_replace($regexp, '', $data);
+    $data = implode('', $matches[0]) . $data;
+
+    // Create the CSS file.
+    file_save_data($data, $csspath .'/'. $filename, FILE_EXISTS_REPLACE);
+  }
+  return $csspath .'/'. $filename;
+}
+
+/**
+ * Helper function for drupal_build_css_cache().
+ *
+ * This function will prefix all paths within a CSS file.
+ */
+function _drupal_build_css_path($matches, $base = NULL) {
+  static $_base;
+  // Store base path for preg_replace_callback.
+  if (isset($base)) {
+    $_base = $base;
+  }
+
+  // Prefix with base and remove '../' segments where possible.
+  $path = $_base . $matches[1];
+  $last = '';
+  while ($path != $last) {
+    $last = $path;
+    $path = preg_replace('`(^|/)(?!\.\./)([^/]+)/\.\./`', '$1', $path);
+  }
+  return 'url('. $path .')';
+}
+
+/**
+ * Loads the stylesheet and resolves all @import commands.
+ *
+ * Loads a stylesheet and replaces @import commands with the contents of the
+ * imported file. Use this instead of file_get_contents when processing
+ * stylesheets.
+ *
+ * The returned contents are compressed removing white space and comments only
+ * when CSS aggregation is enabled. This optimization will not apply for
+ * color.module enabled themes with CSS aggregation turned off.
+ *
+ * @param $file
+ *   Name of the stylesheet to be processed.
+ * @param $optimize
+ *   Defines if CSS contents should be compressed or not.
+ * @return
+ *   Contents of the stylesheet including the imported stylesheets.
+ */
+function drupal_load_stylesheet($file, $optimize = NULL) {
+  static $_optimize;
+  // Store optimization parameter for preg_replace_callback with nested @import loops.
+  if (isset($optimize)) {
+    $_optimize = $optimize;
+  }
+
+  $contents = '';
+  if (file_exists($file)) {
+    // Load the local CSS stylesheet.
+    $contents = file_get_contents($file);
+
+    // Change to the current stylesheet's directory.
+    $cwd = getcwd();
+    chdir(dirname($file));
+
+    // Replaces @import commands with the actual stylesheet content.
+    // This happens recursively but omits external files.
+    $contents = preg_replace_callback('/@import\s*(?:url\()?[\'"]?(?![a-z]+:)([^\'"\()]+)[\'"]?\)?;/', '_drupal_load_stylesheet', $contents);
+    // Remove multiple charset declarations for standards compliance (and fixing Safari problems).
+    $contents = preg_replace('/^@charset\s+[\'"](\S*)\b[\'"];/i', '', $contents);
+
+    if ($_optimize) {
+      // Perform some safe CSS optimizations.
+      $contents = preg_replace('<
+        \s*([@{}:;,]|\)\s|\s\()\s* |  # Remove whitespace around separators, but keep space around parentheses.
+        /\*([^*\\\\]|\*(?!/))+\*/ |   # Remove comments that are not CSS hacks.
+        [\n\r]                        # Remove line breaks.
+        >x', '\1', $contents);
+    }
+
+    // Change back directory.
+    chdir($cwd);
+  }
+
+  return $contents;
+}
+
+/**
+ * Loads stylesheets recursively and returns contents with corrected paths.
+ *
+ * This function is used for recursive loading of stylesheets and
+ * returns the stylesheet content with all url() paths corrected.
+ */
+function _drupal_load_stylesheet($matches) {
+  $filename = $matches[1];
+  // Load the imported stylesheet and replace @import commands in there as well.
+  $file = drupal_load_stylesheet($filename);
+  // Alter all url() paths, but not external.
+  return preg_replace('/url\(([\'"]?)(?![a-z]+:)([^\'")]+)[\'"]?\)?;/i', 'url(\1'. dirname($filename) .'/', $file);
+}
+
+/**
+ * Delete all cached CSS files.
+ */
+function drupal_clear_css_cache() {
+  file_scan_directory(file_create_path('css'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
+}
+
+/**
+ * Add a JavaScript file, setting or inline code to the page.
+ *
+ * The behavior of this function depends on the parameters it is called with.
+ * Generally, it handles the addition of JavaScript to the page, either as
+ * reference to an existing file or as inline code. The following actions can be
+ * performed using this function:
+ *
+ * - Add a file ('core', 'module' and 'theme'):
+ *   Adds a reference to a JavaScript file to the page. JavaScript files
+ *   are placed in a certain order, from 'core' first, to 'module' and finally
+ *   'theme' so that files, that are added later, can override previously added
+ *   files with ease.
+ *
+ * - Add inline JavaScript code ('inline'):
+ *   Executes a piece of JavaScript code on the current page by placing the code
+ *   directly in the page. This can, for example, be useful to tell the user that
+ *   a new message arrived, by opening a pop up, alert box etc.
+ *
+ * - Add settings ('setting'):
+ *   Adds a setting to Drupal's global storage of JavaScript settings. Per-page
+ *   settings are required by some modules to function properly. The settings
+ *   will be accessible at Drupal.settings.
+ *
+ * @param $data
+ *   (optional) If given, the value depends on the $type parameter:
+ *   - 'core', 'module' or 'theme': Path to the file relative to base_path().
+ *   - 'inline': The JavaScript code that should be placed in the given scope.
+ *   - 'setting': An array with configuration options as associative array. The
+ *       array is directly placed in Drupal.settings. You might want to wrap your
+ *       actual configuration settings in another variable to prevent the pollution
+ *       of the Drupal.settings namespace.
+ * @param $type
+ *   (optional) The type of JavaScript that should be added to the page. Allowed
+ *   values are 'core', 'module', 'theme', 'inline' and 'setting'. You
+ *   can, however, specify any value. It is treated as a reference to a JavaScript
+ *   file. Defaults to 'module'.
+ * @param $scope
+ *   (optional) The location in which you want to place the script. Possible
+ *   values are 'header' and 'footer' by default. If your theme implements
+ *   different locations, however, you can also use these.
+ * @param $defer
+ *   (optional) If set to TRUE, the defer attribute is set on the <script> tag.
+ *   Defaults to FALSE. This parameter is not used with $type == 'setting'.
+ * @param $cache
+ *   (optional) If set to FALSE, the JavaScript file is loaded anew on every page
+ *   call, that means, it is not cached. Defaults to TRUE. Used only when $type
+ *   references a JavaScript file.
+ * @param $preprocess
+ *   (optional) Should this JS file be aggregated if this
+ *   feature has been turned on under the performance section?
+ * @return
+ *   If the first parameter is NULL, the JavaScript array that has been built so
+ *   far for $scope is returned. If the first three parameters are NULL,
+ *   an array with all scopes is returned.
+ */
+function drupal_add_js($data = NULL, $type = 'module', $scope = 'header', $defer = FALSE, $cache = TRUE, $preprocess = TRUE) {
+  static $javascript = array();
+
+  if (isset($data)) {
+
+    // Add jquery.js and drupal.js, as well as the basePath setting, the
+    // first time a Javascript file is added.
+    if (empty($javascript)) {
+      $javascript['header'] = array(
+        'core' => array(
+          'misc/jquery.js' => array('cache' => TRUE, 'defer' => FALSE, 'preprocess' => TRUE),
+          'misc/drupal.js' => array('cache' => TRUE, 'defer' => FALSE, 'preprocess' => TRUE),
+        ),
+        'module' => array(),
+        'theme' => array(),
+        'setting' => array(
+          array('basePath' => base_path()),
+        ),
+        'inline' => array(),
+      );
+    }
+
+    if (isset($scope) && !isset($javascript[$scope])) {
+      $javascript[$scope] = array('core' => array(), 'module' => array(), 'theme' => array(), 'setting' => array(), 'inline' => array());
+    }
+
+    if (isset($type) && isset($scope) && !isset($javascript[$scope][$type])) {
+      $javascript[$scope][$type] = array();
+    }
+
+    switch ($type) {
+      case 'setting':
+        $javascript[$scope][$type][] = $data;
+        break;
+      case 'inline':
+        $javascript[$scope][$type][] = array('code' => $data, 'defer' => $defer);
+        break;
+      default:
+        // If cache is FALSE, don't preprocess the JS file.
+        $javascript[$scope][$type][$data] = array('cache' => $cache, 'defer' => $defer, 'preprocess' => (!$cache ? FALSE : $preprocess));
+    }
+  }
+
+  if (isset($scope)) {
+
+    if (isset($javascript[$scope])) {
+      return $javascript[$scope];
+    }
+    else {
+      return array();
+    }
+  }
+  else {
+    return $javascript;
+  }
+}
+
+/**
+ * Returns a themed presentation of all JavaScript code for the current page.
+ *
+ * References to JavaScript files are placed in a certain order: first, all
+ * 'core' files, then all 'module' and finally all 'theme' JavaScript files
+ * are added to the page. Then, all settings are output, followed by 'inline'
+ * JavaScript code. If running update.php, all preprocessing is disabled.
+ *
+ * @param $scope
+ *   (optional) The scope for which the JavaScript rules should be returned.
+ *   Defaults to 'header'.
+ * @param $javascript
+ *   (optional) An array with all JavaScript code. Defaults to the default
+ *   JavaScript array for the given scope.
+ * @return
+ *   All JavaScript code segments and includes for the scope as HTML tags.
+ */
+function drupal_get_js($scope = 'header', $javascript = NULL) {
+  if ((!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') && function_exists('locale_update_js_files')) {
+    locale_update_js_files();
+  }
+
+  if (!isset($javascript)) {
+    $javascript = drupal_add_js(NULL, NULL, $scope);
+  }
+
+  if (empty($javascript)) {
+    return '';
+  }
+
+  $output = '';
+  $preprocessed = '';
+  $no_preprocess = array('core' => '', 'module' => '', 'theme' => '');
+  $files = array();
+  $preprocess_js = (variable_get('preprocess_js', FALSE) && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update'));
+  $directory = file_directory_path();
+  $is_writable = is_dir($directory) && is_writable($directory) && (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) == FILE_DOWNLOADS_PUBLIC);
+
+  // A dummy query-string is added to filenames, to gain control over
+  // browser-caching. The string changes on every update or full cache
+  // flush, forcing browsers to load a new copy of the files, as the
+  // URL changed. Files that should not be cached (see drupal_add_js())
+  // get time() as query-string instead, to enforce reload on every
+  // page request.
+  $query_string = '?'. substr(variable_get('css_js_query_string', '0'), 0, 1);
+
+  // For inline Javascript to validate as XHTML, all Javascript containing
+  // XHTML needs to be wrapped in CDATA. To make that backwards compatible
+  // with HTML 4, we need to comment out the CDATA-tag.
+  $embed_prefix = "\n<!--//--><![CDATA[//><!--\n";
+  $embed_suffix = "\n//--><!]]>\n";
+
+  foreach ($javascript as $type => $data) {
+
+    if (!$data) continue;
+
+    switch ($type) {
+      case 'setting':
+        $output .= '<script type="text/javascript">' . $embed_prefix . 'jQuery.extend(Drupal.settings, ' . drupal_to_js(call_user_func_array('array_merge_recursive', $data)) . ");" . $embed_suffix . "</script>\n";
+        break;
+      case 'inline':
+        foreach ($data as $info) {
+          $output .= '<script type="text/javascript"' . ($info['defer'] ? ' defer="defer"' : '') . '>' . $embed_prefix . $info['code'] . $embed_suffix . "</script>\n";
+        }
+        break;
+      default:
+        // If JS preprocessing is off, we still need to output the scripts.
+        // Additionally, go through any remaining scripts if JS preprocessing is on and output the non-cached ones.
+        foreach ($data as $path => $info) {
+          if (!$info['preprocess'] || !$is_writable || !$preprocess_js) {
+            $no_preprocess[$type] .= '<script type="text/javascript"'. ($info['defer'] ? ' defer="defer"' : '') .' src="'. base_path() . $path . ($info['cache'] ? $query_string : '?'. time()) ."\"></script>\n";
+          }
+          else {
+            $files[$path] = $info;
+          }
+        }
+    }
+  }
+
+  // Aggregate any remaining JS files that haven't already been output.
+  if ($is_writable && $preprocess_js && count($files) > 0) {
+    // Prefix filename to prevent blocking by firewalls which reject files
+    // starting with "ad*".
+    $filename = 'js_'. md5(serialize($files) . $query_string) .'.js';
+    $preprocess_file = drupal_build_js_cache($files, $filename);
+    $preprocessed .= '<script type="text/javascript" src="'. base_path() . $preprocess_file .'"></script>'."\n";
+  }
+
+  // Keep the order of JS files consistent as some are preprocessed and others are not.
+  // Make sure any inline or JS setting variables appear last after libraries have loaded.
+  $output = $preprocessed . implode('', $no_preprocess) . $output;
+
+  return $output;
+}
+
+/**
+ * Assist in adding the tableDrag JavaScript behavior to a themed table.
+ *
+ * Draggable tables should be used wherever an outline or list of sortable items
+ * needs to be arranged by an end-user. Draggable tables are very flexible and
+ * can manipulate the value of form elements placed within individual columns.
+ *
+ * To set up a table to use drag and drop in place of weight select-lists or
+ * in place of a form that contains parent relationships, the form must be
+ * themed into a table. The table must have an id attribute set. If using
+ * theme_table(), the id may be set as such:
+ * @code
+ * $output = theme('table', $header, $rows, array('id' => 'my-module-table'));
+ * return $output;
+ * @endcode
+ *
+ * In the theme function for the form, a special class must be added to each
+ * form element within the same column, "grouping" them together.
+ *
+ * In a situation where a single weight column is being sorted in the table, the
+ * classes could be added like this (in the theme function):
+ * @code
+ * $form['my_elements'][$delta]['weight']['#attributes']['class'] = "my-elements-weight";
+ * @endcode
+ *
+ * Each row of the table must also have a class of "draggable" in order to enable the
+ * drag handles:
+ * @code
+ * $row = array(...);
+ * $rows[] = array(
+ *   'data' => $row,
+ *   'class' => 'draggable',
+ * );
+ * @endcode
+ *
+ * When tree relationships are present, the two additional classes
+ * 'tabledrag-leaf' and 'tabledrag-root' can be used to refine the behavior:
+ * - Rows with the 'tabledrag-leaf' class cannot have child rows.
+ * - Rows with the 'tabledrag-root' class cannot be nested under a parent row.
+ *
+ * Calling drupal_add_tabledrag() would then be written as such:
+ * @code
+ * drupal_add_tabledrag('my-module-table', 'order', 'sibling', 'my-elements-weight');
+ * @endcode
+ *
+ * In a more complex case where there are several groups in one column (such as
+ * the block regions on the admin/build/block page), a separate subgroup class
+ * must also be added to differentiate the groups.
+ * @code
+ * $form['my_elements'][$region][$delta]['weight']['#attributes']['class'] = "my-elements-weight my-elements-weight-". $region;
+ * @endcode
+ *
+ * $group is still 'my-element-weight', and the additional $subgroup variable
+ * will be passed in as 'my-elements-weight-'. $region. This also means that
+ * you'll need to call drupal_add_tabledrag() once for every region added.
+ *
+ * @code
+ * foreach ($regions as $region) {
+ *   drupal_add_tabledrag('my-module-table', 'order', 'sibling', 'my-elements-weight', 'my-elements-weight-'. $region);
+ * }
+ * @endcode
+ *
+ * In a situation where tree relationships are present, adding multiple
+ * subgroups is not necessary, because the table will contain indentations that
+ * provide enough information about the sibling and parent relationships.
+ * See theme_menu_overview_form() for an example creating a table containing
+ * parent relationships.
+ *
+ * Please note that this function should be called from the theme layer, such as
+ * in a .tpl.php file, theme_ function, or in a template_preprocess function,
+ * not in a form declartion. Though the same JavaScript could be added to the
+ * page using drupal_add_js() directly, this function helps keep template files
+ * clean and readable. It also prevents tabledrag.js from being added twice
+ * accidentally.
+ *
+ * @param $table_id
+ *   String containing the target table's id attribute. If the table does not
+ *   have an id, one will need to be set, such as <table id="my-module-table">.
+ * @param $action
+ *   String describing the action to be done on the form item. Either 'match'
+ *   'depth', or 'order'. Match is typically used for parent relationships.
+ *   Order is typically used to set weights on other form elements with the same
+ *   group. Depth updates the target element with the current indentation.
+ * @param $relationship
+ *   String describing where the $action variable should be performed. Either
+ *   'parent', 'sibling', 'group', or 'self'. Parent will only look for fields
+ *   up the tree. Sibling will look for fields in the same group in rows above
+ *   and below it. Self affects the dragged row itself. Group affects the
+ *   dragged row, plus any children below it (the entire dragged group).
+ * @param $group
+ *   A class name applied on all related form elements for this action.
+ * @param $subgroup
+ *   (optional) If the group has several subgroups within it, this string should
+ *   contain the class name identifying fields in the same subgroup.
+ * @param $source
+ *   (optional) If the $action is 'match', this string should contain the class
+ *   name identifying what field will be used as the source value when matching
+ *   the value in $subgroup.
+ * @param $hidden
+ *   (optional) The column containing the field elements may be entirely hidden
+ *   from view dynamically when the JavaScript is loaded. Set to FALSE if the
+ *   column should not be hidden.
+ * @param $limit
+ *   (optional) Limit the maximum amount of parenting in this table.
+ * @see block-admin-display-form.tpl.php
+ * @see theme_menu_overview_form()
+ */
+function drupal_add_tabledrag($table_id, $action, $relationship, $group, $subgroup = NULL, $source = NULL, $hidden = TRUE, $limit = 0) {
+  static $js_added = FALSE;
+  if (!$js_added) {
+    drupal_add_js('misc/tabledrag.js', 'core');
+    $js_added = TRUE;
+  }
+
+  // If a subgroup or source isn't set, assume it is the same as the group.
+  $target = isset($subgroup) ? $subgroup : $group;
+  $source = isset($source) ? $source : $target;
+  $settings['tableDrag'][$table_id][$group][] = array(
+    'target' => $target,
+    'source' => $source,
+    'relationship' => $relationship,
+    'action' => $action,
+    'hidden' => $hidden,
+    'limit' => $limit,
+  );
+  drupal_add_js($settings, 'setting');
+}
+
+/**
+ * Aggregate JS files, putting them in the files directory.
+ *
+ * @param $files
+ *   An array of JS files to aggregate and compress into one file.
+ * @param $filename
+ *   The name of the aggregate JS file.
+ * @return
+ *   The name of the JS file.
+ */
+function drupal_build_js_cache($files, $filename) {
+  $contents = '';
+
+  // Create the js/ within the files folder.
+  $jspath = file_create_path('js');
+  file_check_directory($jspath, FILE_CREATE_DIRECTORY);
+
+  if (!file_exists($jspath .'/'. $filename)) {
+    // Build aggregate JS file.
+    foreach ($files as $path => $info) {
+      if ($info['preprocess']) {
+        // Append a ';' after each JS file to prevent them from running together.
+        $contents .= file_get_contents($path) .';';
+      }
+    }
+
+    // Create the JS file.
+    file_save_data($contents, $jspath .'/'. $filename, FILE_EXISTS_REPLACE);
+  }
+
+  return $jspath .'/'. $filename;
+}
+
+/**
+ * Delete all cached JS files.
+ */
+function drupal_clear_js_cache() {
+  file_scan_directory(file_create_path('js'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
+  variable_set('javascript_parsed', array());
+}
+
+/**
+ * Converts a PHP variable into its Javascript equivalent.
+ *
+ * We use HTML-safe strings, i.e. with <, > and & escaped.
+ */
+function drupal_to_js($var) {
+  switch (gettype($var)) {
+    case 'boolean':
+      return $var ? 'true' : 'false'; // Lowercase necessary!
+    case 'integer':
+    case 'double':
+      return $var;
+    case 'resource':
+    case 'string':
+      return '"'. str_replace(array("\r", "\n", "<", ">", "&"),
+                              array('\r', '\n', '\x3c', '\x3e', '\x26'),
+                              addslashes($var)) .'"';
+    case 'array':
+      // Arrays in JSON can't be associative. If the array is empty or if it
+      // has sequential whole number keys starting with 0, it's not associative
+      // so we can go ahead and convert it as an array.
+      if (empty ($var) || array_keys($var) === range(0, sizeof($var) - 1)) {
+        $output = array();
+        foreach ($var as $v) {
+          $output[] = drupal_to_js($v);
+        }
+        return '[ '. implode(', ', $output) .' ]';
+      }
+      // Otherwise, fall through to convert the array as an object.
+    case 'object':
+      $output = array();
+      foreach ($var as $k => $v) {
+        $output[] = drupal_to_js(strval($k)) .': '. drupal_to_js($v);
+      }
+      return '{ '. implode(', ', $output) .' }';
+    default:
+      return 'null';
+  }
+}
+
+/**
+ * Return data in JSON format.
+ *
+ * This function should be used for JavaScript callback functions returning
+ * data in JSON format. It sets the header for JavaScript output.
+ *
+ * @param $var
+ *   (optional) If set, the variable will be converted to JSON and output.
+ */
+function drupal_json($var = NULL) {
+  // We are returning JavaScript, so tell the browser.
+  drupal_set_header('Content-Type: text/javascript; charset=utf-8');
+
+  if (isset($var)) {
+    echo drupal_to_js($var);
+  }
+}
+
+/**
+ * Wrapper around urlencode() which avoids Apache quirks.
+ *
+ * Should be used when placing arbitrary data in an URL. Note that Drupal paths
+ * are urlencoded() when passed through url() and do not require urlencoding()
+ * of individual components.
+ *
+ * Notes:
+ * - For esthetic reasons, we do not escape slashes. This also avoids a 'feature'
+ *   in Apache where it 404s on any path containing '%2F'.
+ * - mod_rewrite unescapes %-encoded ampersands, hashes, and slashes when clean
+ *   URLs are used, which are interpreted as delimiters by PHP. These
+ *   characters are double escaped so PHP will still see the encoded version.
+ * - With clean URLs, Apache changes '//' to '/', so every second slash is
+ *   double escaped.
+ *
+ * @param $text
+ *   String to encode
+ */
+function drupal_urlencode($text) {
+  if (variable_get('clean_url', '0')) {
+    return str_replace(array('%2F', '%26', '%23', '//'),
+                       array('/', '%2526', '%2523', '/%252F'),
+                       rawurlencode($text));
+  }
+  else {
+    return str_replace('%2F', '/', rawurlencode($text));
+  }
+}
+
+/**
+ * Ensure the private key variable used to generate tokens is set.
+ *
+ * @return
+ *   The private key.
+ */
+function drupal_get_private_key() {
+  if (!($key = variable_get('drupal_private_key', 0))) {
+    $key = md5(uniqid(mt_rand(), true)) . md5(uniqid(mt_rand(), true));
+    variable_set('drupal_private_key', $key);
+  }
+  return $key;
+}
+
+/**
+ * Generate a token based on $value, the current user session and private key.
+ *
+ * @param $value
+ *   An additional value to base the token on.
+ */
+function drupal_get_token($value = '') {
+  $private_key = drupal_get_private_key();
+  return md5(session_id() . $value . $private_key);
+}
+
+/**
+ * Validate a token based on $value, the current user session and private key.
+ *
+ * @param $token
+ *   The token to be validated.
+ * @param $value
+ *   An additional value to base the token on.
+ * @param $skip_anonymous
+ *   Set to true to skip token validation for anonymous users.
+ * @return
+ *   True for a valid token, false for an invalid token. When $skip_anonymous
+ *   is true, the return value will always be true for anonymous users.
+ */
+function drupal_valid_token($token, $value = '', $skip_anonymous = FALSE) {
+  global $user;
+  return (($skip_anonymous && $user->uid == 0) || ($token == md5(session_id() . $value . variable_get('drupal_private_key', ''))));
+}
+
+/**
+ * Performs one or more XML-RPC request(s).
+ *
+ * @param $url
+ *   An absolute URL of the XML-RPC endpoint.
+ *     Example:
+ *     http://www.example.com/xmlrpc.php
+ * @param ...
+ *   For one request:
+ *     The method name followed by a variable number of arguments to the method.
+ *   For multiple requests (system.multicall):
+ *     An array of call arrays. Each call array follows the pattern of the single
+ *     request: method name followed by the arguments to the method.
+ * @return
+ *   For one request:
+ *     Either the return value of the method on success, or FALSE.
+ *     If FALSE is returned, see xmlrpc_errno() and xmlrpc_error_msg().
+ *   For multiple requests:
+ *     An array of results. Each result will either be the result
+ *     returned by the method called, or an xmlrpc_error object if the call
+ *     failed. See xmlrpc_error().
+ */
+function xmlrpc($url) {
+  require_once './includes/xmlrpc.inc';
+  $args = func_get_args();
+  return call_user_func_array('_xmlrpc', $args);
+}
+
+function _drupal_bootstrap_full() {
+  static $called;
+
+  if ($called) {
+    return;
+  }
+  $called = 1;
+  require_once './includes/theme.inc';
+  require_once './includes/pager.inc';
+  require_once './includes/menu.inc';
+  require_once './includes/tablesort.inc';
+  require_once './includes/file.inc';
+  require_once './includes/unicode.inc';
+  require_once './includes/image.inc';
+  require_once './includes/form.inc';
+  require_once './includes/mail.inc';
+  require_once './includes/actions.inc';
+  // Set the Drupal custom error handler.
+  set_error_handler('drupal_error_handler');
+  // Emit the correct charset HTTP header.
+  drupal_set_header('Content-Type: text/html; charset=utf-8');
+  // Detect string handling method
+  unicode_check();
+  // Undo magic quotes
+  fix_gpc_magic();
+  // Load all enabled modules
+  module_load_all();
+  // Let all modules take action before menu system handles the request
+  // We do not want this while running update.php.
+  if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
+    module_invoke_all('init');
+  }
+}
+
+/**
+ * Store the current page in the cache.
+ *
+ * We try to store a gzipped version of the cache. This requires the
+ * PHP zlib extension (http://php.net/manual/en/ref.zlib.php).
+ * Presence of the extension is checked by testing for the function
+ * gzencode. There are two compression algorithms: gzip and deflate.
+ * The majority of all modern browsers support gzip or both of them.
+ * We thus only deal with the gzip variant and unzip the cache in case
+ * the browser does not accept gzip encoding.
+ *
+ * @see drupal_page_header
+ */
+function page_set_cache() {
+  global $user, $base_root;
+
+  if (!$user->uid && $_SERVER['REQUEST_METHOD'] == 'GET' && page_get_cache(TRUE)) {
+    // This will fail in some cases, see page_get_cache() for the explanation.
+    if ($data = ob_get_contents()) {
+      $cache = TRUE;
+      if (variable_get('page_compression', TRUE) && function_exists('gzencode')) {
+        // We do not store the data in case the zlib mode is deflate.
+        // This should be rarely happening.
+        if (zlib_get_coding_type() == 'deflate') {
+          $cache = FALSE;
+        }
+        else if (zlib_get_coding_type() == FALSE) {
+          $data = gzencode($data, 9, FORCE_GZIP);
+        }
+        // The remaining case is 'gzip' which means the data is
+        // already compressed and nothing left to do but to store it.
+      }
+      ob_end_flush();
+      if ($cache && $data) {
+        cache_set($base_root . request_uri(), $data, 'cache_page', CACHE_TEMPORARY, drupal_get_headers());
+      }
+    }
+  }
+}
+
+/**
+ * Executes a cron run when called
+ * @return
+ * Returns TRUE if ran successfully
+ */
+function drupal_cron_run() {
+  // If not in 'safe mode', increase the maximum execution time:
+  if (!ini_get('safe_mode')) {
+    set_time_limit(240);
+  }
+
+  // Fetch the cron semaphore
+  $semaphore = variable_get('cron_semaphore', FALSE);
+
+  if ($semaphore) {
+    if (time() - $semaphore > 3600) {
+      // Either cron has been running for more than an hour or the semaphore
+      // was not reset due to a database error.
+      watchdog('cron', 'Cron has been running for more than an hour and is most likely stuck.', array(), WATCHDOG_ERROR);
+
+      // Release cron semaphore
+      variable_del('cron_semaphore');
+    }
+    else {
+      // Cron is still running normally.
+      watchdog('cron', 'Attempting to re-run cron while it is already running.', array(), WATCHDOG_WARNING);
+    }
+  }
+  else {
+    // Register shutdown callback
+    register_shutdown_function('drupal_cron_cleanup');
+
+    // Lock cron semaphore
+    variable_set('cron_semaphore', time());
+
+    // Iterate through the modules calling their cron handlers (if any):
+    module_invoke_all('cron');
+
+    // Record cron time
+    variable_set('cron_last', time());
+    watchdog('cron', 'Cron run completed.', array(), WATCHDOG_NOTICE);
+
+    // Release cron semaphore
+    variable_del('cron_semaphore');
+
+    // Return TRUE so other functions can check if it did run successfully
+    return TRUE;
+  }
+}
+
+/**
+ * Shutdown function for cron cleanup.
+ */
+function drupal_cron_cleanup() {
+  // See if the semaphore is still locked.
+  if (variable_get('cron_semaphore', FALSE)) {
+    watchdog('cron', 'Cron run exceeded the time limit and was aborted.', array(), WATCHDOG_WARNING);
+
+    // Release cron semaphore
+    variable_del('cron_semaphore');
+  }
+}
+
+/**
+ * Return an array of system file objects.
+ *
+ * Returns an array of file objects of the given type from the site-wide
+ * directory (i.e. modules/), the all-sites directory (i.e.
+ * sites/all/modules/), the profiles directory, and site-specific directory
+ * (i.e. sites/somesite/modules/). The returned array will be keyed using the
+ * key specified (name, basename, filename). Using name or basename will cause
+ * site-specific files to be prioritized over similar files in the default
+ * directories. That is, if a file with the same name appears in both the
+ * site-wide directory and site-specific directory, only the site-specific
+ * version will be included.
+ *
+ * @param $mask
+ *   The regular expression of the files to find.
+ * @param $directory
+ *   The subdirectory name in which the files are found. For example,
+ *   'modules' will search in both modules/ and
+ *   sites/somesite/modules/.
+ * @param $key
+ *   The key to be passed to file_scan_directory().
+ * @param $min_depth
+ *   Minimum depth of directories to return files from.
+ *
+ * @return
+ *   An array of file objects of the specified type.
+ */
+function drupal_system_listing($mask, $directory, $key = 'name', $min_depth = 1) {
+  global $profile;
+  $config = conf_path();
+
+  // When this function is called during Drupal's initial installation process,
+  // the name of the profile that's about to be installed is stored in the global
+  // $profile variable. At all other times, the standard Drupal systems variable
+  // table contains the name of the current profile, and we can call variable_get()
+  // to determine what one is active.
+  if (!isset($profile)) {
+    $profile = variable_get('install_profile', 'default');
+  }
+  $searchdir = array($directory);
+  $files = array();
+
+  // Always search sites/all/* as well as the global directories
+  $searchdir[] = 'sites/all/'. $directory;
+
+  // The 'profiles' directory contains pristine collections of modules and
+  // themes as organized by a distribution.  It is pristine in the same way
+  // that /modules is pristine for core; users should avoid changing anything
+  // there in favor of sites/all or sites/<domain> directories.
+  if (file_exists("profiles/$profile/$directory")) {
+    $searchdir[] = "profiles/$profile/$directory";
+  }
+
+  if (file_exists("$config/$directory")) {
+    $searchdir[] = "$config/$directory";
+  }
+
+  // Get current list of items
+  foreach ($searchdir as $dir) {
+    $files = array_merge($files, file_scan_directory($dir, $mask, array('.', '..', 'CVS'), 0, TRUE, $key, $min_depth));
+  }
+
+  return $files;
+}
+
+
+/**
+ * This dispatch function hands off structured Drupal arrays to type-specific
+ * *_alter implementations. It ensures a consistent interface for all altering
+ * operations.
+ *
+ * @param $type
+ *   The data type of the structured array. 'form', 'links',
+ *   'node_content', and so on are several examples.
+ * @param $data
+ *   The structured array to be altered.
+ * @param ...
+ *   Any additional params will be passed on to the called
+ *   hook_$type_alter functions.
+ */
+function drupal_alter($type, &$data) {
+  // PHP's func_get_args() always returns copies of params, not references, so
+  // drupal_alter() can only manipulate data that comes in via the required first
+  // param. For the edge case functions that must pass in an arbitrary number of
+  // alterable parameters (hook_form_alter() being the best example), an array of
+  // those params can be placed in the __drupal_alter_by_ref key of the $data
+  // array. This is somewhat ugly, but is an unavoidable consequence of a flexible
+  // drupal_alter() function, and the limitations of func_get_args().
+  // @todo: Remove this in Drupal 7.
+  if (is_array($data) && isset($data['__drupal_alter_by_ref'])) {
+    $by_ref_parameters = $data['__drupal_alter_by_ref'];
+    unset($data['__drupal_alter_by_ref']);
+  }
+
+  // Hang onto a reference to the data array so that it isn't blown away later.
+  // Also, merge in any parameters that need to be passed by reference.
+  $args = array(&$data);
+  if (isset($by_ref_parameters)) {
+    $args = array_merge($args, $by_ref_parameters);
+  }
+
+  // Now, use func_get_args() to pull in any additional parameters passed into
+  // the drupal_alter() call.
+  $additional_args = func_get_args();
+  array_shift($additional_args);
+  array_shift($additional_args);
+  $args = array_merge($args, $additional_args);
+
+  foreach (module_implements($type .'_alter') as $module) {
+    $function = $module .'_'. $type .'_alter';
+    call_user_func_array($function, $args);
+  }
+}
+
+
+/**
+ * Renders HTML given a structured array tree.
+ *
+ * Recursively iterates over each of the array elements, generating HTML code.
+ * This function is usually called from within a another function, like
+ * drupal_get_form() or node_view().
+ *
+ * @param $elements
+ *   The structured array describing the data to be rendered.
+ * @return
+ *   The rendered HTML.
+ */
+function drupal_render(&$elements) {
+  if (!isset($elements) || (isset($elements['#access']) && !$elements['#access'])) {
+    return NULL;
+  }
+
+  // If the default values for this element haven't been loaded yet, populate
+  // them.
+  if (!isset($elements['#defaults_loaded']) || !$elements['#defaults_loaded']) {
+    if ((!empty($elements['#type'])) && ($info = _element_info($elements['#type']))) {
+      $elements += $info;
+    }
+  }
+
+  // Make any final changes to the element before it is rendered. This means
+  // that the $element or the children can be altered or corrected before the
+  // element is rendered into the final text.
+  if (isset($elements['#pre_render'])) {
+    foreach ($elements['#pre_render'] as $function) {
+      if (function_exists($function)) {
+        $elements = $function($elements);
+      }
+    }
+  }
+
+  $content = '';
+  // Either the elements did not go through form_builder or one of the children
+  // has a #weight.
+  if (!isset($elements['#sorted'])) {
+    uasort($elements, "element_sort");
+  }
+  $elements += array('#title' => NULL, '#description' => NULL);
+  if (!isset($elements['#children'])) {
+    $children = element_children($elements);
+    // Render all the children that use a theme function.
+    if (isset($elements['#theme']) && empty($elements['#theme_used'])) {
+      $elements['#theme_used'] = TRUE;
+
+      $previous = array();
+      foreach (array('#value', '#type', '#prefix', '#suffix') as $key) {
+        $previous[$key] = isset($elements[$key]) ? $elements[$key] : NULL;
+      }
+      // If we rendered a single element, then we will skip the renderer.
+      if (empty($children)) {
+        $elements['#printed'] = TRUE;
+      }
+      else {
+        $elements['#value'] = '';
+      }
+      $elements['#type'] = 'markup';
+
+      unset($elements['#prefix'], $elements['#suffix']);
+      $content = theme($elements['#theme'], $elements);
+
+      foreach (array('#value', '#type', '#prefix', '#suffix') as $key) {
+        $elements[$key] = isset($previous[$key]) ? $previous[$key] : NULL;
+      }
+    }
+    // Render each of the children using drupal_render and concatenate them.
+    if (!isset($content) || $content === '') {
+      foreach ($children as $key) {
+        $content .= drupal_render($elements[$key]);
+      }
+    }
+  }
+  if (isset($content) && $content !== '') {
+    $elements['#children'] = $content;
+  }
+
+  // Until now, we rendered the children, here we render the element itself
+  if (!isset($elements['#printed'])) {
+    $content = theme(!empty($elements['#type']) ? $elements['#type'] : 'markup', $elements);
+    $elements['#printed'] = TRUE;
+  }
+
+  if (isset($content) && $content !== '') {
+    // Filter the outputted content and make any last changes before the
+    // content is sent to the browser. The changes are made on $content
+    // which allows the output'ed text to be filtered.
+    if (isset($elements['#post_render'])) {
+      foreach ($elements['#post_render'] as $function) {
+        if (function_exists($function)) {
+          $content = $function($content, $elements);
+        }
+      }
+    }
+    $prefix = isset($elements['#prefix']) ? $elements['#prefix'] : '';
+    $suffix = isset($elements['#suffix']) ? $elements['#suffix'] : '';
+    return $prefix . $content . $suffix;
+  }
+}
+
+/**
+ * Function used by uasort to sort structured arrays by weight.
+ */
+function element_sort($a, $b) {
+  $a_weight = (is_array($a) && isset($a['#weight'])) ? $a['#weight'] : 0;
+  $b_weight = (is_array($b) && isset($b['#weight'])) ? $b['#weight'] : 0;
+  if ($a_weight == $b_weight) {
+    return 0;
+  }
+  return ($a_weight < $b_weight) ? -1 : 1;
+}
+
+/**
+ * Check if the key is a property.
+ */
+function element_property($key) {
+  return $key[0] == '#';
+}
+
+/**
+ * Get properties of a structured array element. Properties begin with '#'.
+ */
+function element_properties($element) {
+  return array_filter(array_keys((array) $element), 'element_property');
+}
+
+/**
+ * Check if the key is a child.
+ */
+function element_child($key) {
+  return !isset($key[0]) || $key[0] != '#';
+}
+
+/**
+ * Get keys of a structured array tree element that are not properties (i.e., do not begin with '#').
+ */
+function element_children($element) {
+  return array_filter(array_keys((array) $element), 'element_child');
+}
+
+/**
+ * Provide theme registration for themes across .inc files.
+ */
+function drupal_common_theme() {
+  return array(
+    // theme.inc
+    'placeholder' => array(
+      'arguments' => array('text' => NULL)
+    ),
+    'page' => array(
+      'arguments' => array('content' => NULL, 'show_blocks' => TRUE, 'show_messages' => TRUE),
+      'template' => 'page',
+    ),
+    'maintenance_page' => array(
+      'arguments' => array('content' => NULL, 'show_blocks' => TRUE, 'show_messages' => TRUE),
+      'template' => 'maintenance-page',
+    ),
+    'update_page' => array(
+      'arguments' => array('content' => NULL, 'show_messages' => TRUE),
+    ),
+    'install_page' => array(
+      'arguments' => array('content' => NULL),
+    ),
+    'task_list' => array(
+      'arguments' => array('items' => NULL, 'active' => NULL),
+    ),
+    'status_messages' => array(
+      'arguments' => array('display' => NULL),
+    ),
+    'links' => array(
+      'arguments' => array('links' => NULL, 'attributes' => array('class' => 'links')),
+    ),
+    'image' => array(
+      'arguments' => array('path' => NULL, 'alt' => '', 'title' => '', 'attributes' => NULL, 'getsize' => TRUE),
+    ),
+    'breadcrumb' => array(
+      'arguments' => array('breadcrumb' => NULL),
+    ),
+    'help' => array(
+      'arguments' => array(),
+    ),
+    'submenu' => array(
+      'arguments' => array('links' => NULL),
+    ),
+    'table' => array(
+      'arguments' => array('header' => NULL, 'rows' => NULL, 'attributes' => array(), 'caption' => NULL),
+    ),
+    'table_select_header_cell' => array(
+      'arguments' => array(),
+    ),
+    'tablesort_indicator' => array(
+      'arguments' => array('style' => NULL),
+    ),
+    'box' => array(
+      'arguments' => array('title' => NULL, 'content' => NULL, 'region' => 'main'),
+      'template' => 'box',
+    ),
+    'block' => array(
+      'arguments' => array('block' => NULL),
+      'template' => 'block',
+    ),
+    'mark' => array(
+      'arguments' => array('type' => MARK_NEW),
+    ),
+    'item_list' => array(
+      'arguments' => array('items' => array(), 'title' => NULL, 'type' => 'ul', 'attributes' => NULL),
+    ),
+    'more_help_link' => array(
+      'arguments' => array('url' => NULL),
+    ),
+    'xml_icon' => array(
+      'arguments' => array('url' => NULL),
+    ),
+    'feed_icon' => array(
+      'arguments' => array('url' => NULL, 'title' => NULL),
+    ),
+    'more_link' => array(
+      'arguments' => array('url' => NULL, 'title' => NULL)
+    ),
+    'closure' => array(
+      'arguments' => array('main' => 0),
+    ),
+    'blocks' => array(
+      'arguments' => array('region' => NULL),
+    ),
+    'username' => array(
+      'arguments' => array('object' => NULL),
+    ),
+    'progress_bar' => array(
+      'arguments' => array('percent' => NULL, 'message' => NULL),
+    ),
+    'indentation' => array(
+      'arguments' => array('size' => 1),
+    ),
+    // from pager.inc
+    'pager' => array(
+      'arguments' => array('tags' => array(), 'limit' => 10, 'element' => 0, 'parameters' => array()),
+    ),
+    'pager_first' => array(
+      'arguments' => array('text' => NULL, 'limit' => NULL, 'element' => 0, 'parameters' => array()),
+    ),
+    'pager_previous' => array(
+      'arguments' => array('text' => NULL, 'limit' => NULL, 'element' => 0, 'interval' => 1, 'parameters' => array()),
+    ),
+    'pager_next' => array(
+      'arguments' => array('text' => NULL, 'limit' => NULL, 'element' => 0, 'interval' => 1, 'parameters' => array()),
+    ),
+    'pager_last' => array(
+      'arguments' => array('text' => NULL, 'limit' => NULL, 'element' => 0, 'parameters' => array()),
+    ),
+    'pager_link' => array(
+      'arguments' => array('text' => NULL, 'page_new' => NULL, 'element' => NULL, 'parameters' => array(), 'attributes' => array()),
+    ),
+    // from locale.inc
+    'locale_admin_manage_screen' => array(
+      'arguments' => array('form' => NULL),
+    ),
+    // from menu.inc
+    'menu_item_link' => array(
+      'arguments' => array('item' => NULL),
+    ),
+    'menu_tree' => array(
+      'arguments' => array('tree' => NULL),
+    ),
+    'menu_item' => array(
+      'arguments' => array('link' => NULL, 'has_children' => NULL, 'menu' => ''),
+    ),
+    'menu_local_task' => array(
+      'arguments' => array('link' => NULL, 'active' => FALSE),
+    ),
+    'menu_local_tasks' => array(
+      'arguments' => array(),
+    ),
+    // from form.inc
+    'select' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'fieldset' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'radio' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'radios' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'password_confirm' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'date' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'item' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'checkbox' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'checkboxes' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'submit' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'button' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'image_button' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'hidden' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'token' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'textfield' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'form' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'textarea' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'markup' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'password' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'file' => array(
+      'arguments' => array('element' => NULL),
+    ),
+    'form_element' => array(
+      'arguments' => array('element' => NULL, 'value' => NULL),
+    ),
+  );
+}
+
+/**
+ * @ingroup schemaapi
+ * @{
+ */
+
+/**
+ * Get the schema definition of a table, or the whole database schema.
+ *
+ * The returned schema will include any modifications made by any
+ * module that implements hook_schema_alter().
+ *
+ * @param $table
+ *   The name of the table. If not given, the schema of all tables is returned.
+ * @param $rebuild
+ *   If true, the schema will be rebuilt instead of retrieved from the cache.
+ */
+function drupal_get_schema($table = NULL, $rebuild = FALSE) {
+  static $schema = array();
+
+  if (empty($schema) || $rebuild) {
+    // Try to load the schema from cache.
+    if (!$rebuild && $cached = cache_get('schema')) {
+      $schema = $cached->data;
+    }
+    // Otherwise, rebuild the schema cache.
+    else {
+      $schema = array();
+      // Load the .install files to get hook_schema.
+      module_load_all_includes('install');
+
+      // Invoke hook_schema for all modules.
+      foreach (module_implements('schema') as $module) {
+        $current = module_invoke($module, 'schema');
+        _drupal_initialize_schema($module, $current);
+        $schema = array_merge($schema, $current);
+      }
+
+      drupal_alter('schema', $schema);
+      cache_set('schema', $schema);
+    }
+  }
+
+  if (!isset($table)) {
+    return $schema;
+  }
+  elseif (isset($schema[$table])) {
+    return $schema[$table];
+  }
+  else {
+    return FALSE;
+  }
+}
+
+/**
+ * Create all tables that a module defines in its hook_schema().
+ *
+ * Note: This function does not pass the module's schema through
+ * hook_schema_alter(). The module's tables will be created exactly as the
+ * module defines them.
+ *
+ * @param $module
+ *   The module for which the tables will be created.
+ * @return
+ *   An array of arrays with the following key/value pairs:
+ *    - success: a boolean indicating whether the query succeeded.
+ *    - query: the SQL query(s) executed, passed through check_plain().
+ */
+function drupal_install_schema($module) {
+  $schema = drupal_get_schema_unprocessed($module);
+  _drupal_initialize_schema($module, $schema);
+
+  $ret = array();
+  foreach ($schema as $name => $table) {
+    db_create_table($ret, $name, $table);
+  }
+  return $ret;
+}
+
+/**
+ * Remove all tables that a module defines in its hook_schema().
+ *
+ * Note: This function does not pass the module's schema through
+ * hook_schema_alter(). The module's tables will be created exactly as the
+ * module defines them.
+ *
+ * @param $module
+ *   The module for which the tables will be removed.
+ * @return
+ *   An array of arrays with the following key/value pairs:
+ *    - success: a boolean indicating whether the query succeeded.
+ *    - query: the SQL query(s) executed, passed through check_plain().
+ */
+function drupal_uninstall_schema($module) {
+  $schema = drupal_get_schema_unprocessed($module);
+  _drupal_initialize_schema($module, $schema);
+
+  $ret = array();
+  foreach ($schema as $table) {
+    db_drop_table($ret, $table['name']);
+  }
+  return $ret;
+}
+
+/**
+ * Returns the unprocessed and unaltered version of a module's schema.
+ *
+ * Use this function only if you explicitly need the original
+ * specification of a schema, as it was defined in a module's
+ * hook_schema(). No additional default values will be set,
+ * hook_schema_alter() is not invoked and these unprocessed
+ * definitions won't be cached.
+ *
+ * This function can be used to retrieve a schema specification in
+ * hook_schema(), so it allows you to derive your tables from existing
+ * specifications.
+ *
+ * It is also used by drupal_install_schema() and
+ * drupal_uninstall_schema() to ensure that a module's tables are
+ * created exactly as specified without any changes introduced by a
+ * module that implements hook_schema_alter().
+ *
+ * @param $module
+ *   The module to which the table belongs.
+ * @param $table
+ *   The name of the table. If not given, the module's complete schema
+ *   is returned.
+ */
+function drupal_get_schema_unprocessed($module, $table = NULL) {
+  // Load the .install file to get hook_schema.
+  module_load_include('install', $module);
+  $schema = module_invoke($module, 'schema');
+
+  if (!is_null($table) && isset($schema[$table])) {
+    return $schema[$table];
+  }
+  else {
+    return $schema;
+  }
+}
+
+/**
+ * Fill in required default values for table definitions returned by hook_schema().
+ *
+ * @param $module
+ *   The module for which hook_schema() was invoked.
+ * @param $schema
+ *   The schema definition array as it was returned by the module's
+ *   hook_schema().
+ */
+function _drupal_initialize_schema($module, &$schema) {
+  // Set the name and module key for all tables.
+  foreach ($schema as $name => $table) {
+    if (empty($table['module'])) {
+      $schema[$name]['module'] = $module;
+    }
+    if (!isset($table['name'])) {
+      $schema[$name]['name'] = $name;
+    }
+  }
+}
+
+/**
+ * Retrieve a list of fields from a table schema. The list is suitable for use in a SQL query.
+ *
+ * @param $table
+ *   The name of the table from which to retrieve fields.
+ * @param
+ *   An optional prefix to to all fields.
+ *
+ * @return An array of fields.
+ **/
+function drupal_schema_fields_sql($table, $prefix = NULL) {
+  $schema = drupal_get_schema($table);
+  $fields = array_keys($schema['fields']);
+  if ($prefix) {
+    $columns = array();
+    foreach ($fields as $field) {
+      $columns[] = "$prefix.$field";
+    }
+    return $columns;
+  }
+  else {
+    return $fields;
+  }
+}
+
+/**
+ * Save a record to the database based upon the schema.
+ *
+ * Default values are filled in for missing items, and 'serial' (auto increment)
+ * types are filled in with IDs.
+ *
+ * @param $table
+ *   The name of the table; this must exist in schema API.
+ * @param $object
+ *   The object to write. This is a reference, as defaults according to
+ *   the schema may be filled in on the object, as well as ID on the serial
+ *   type(s). Both array an object types may be passed.
+ * @param $update
+ *   If this is an update, specify the primary keys' field names. It is the
+ *   caller's responsibility to know if a record for this object already
+ *   exists in the database. If there is only 1 key, you may pass a simple string.
+ * @return
+ *   Failure to write a record will return FALSE. Otherwise SAVED_NEW or
+ *   SAVED_UPDATED is returned depending on the operation performed. The
+ *   $object parameter contains values for any serial fields defined by
+ *   the $table. For example, $object->nid will be populated after inserting
+ *   a new node.
+ */
+function drupal_write_record($table, &$object, $update = array()) {
+  // Standardize $update to an array.
+  if (is_string($update)) {
+    $update = array($update);
+  }
+
+  $schema = drupal_get_schema($table);
+  if (empty($schema)) {
+    return FALSE;
+  }
+
+  // Convert to an object if needed.
+  if (is_array($object)) {
+    $object = (object) $object;
+    $array = TRUE;
+  }
+  else {
+    $array = FALSE;
+  }
+
+  $fields = $defs = $values = $serials = $placeholders = array();
+
+  // Go through our schema, build SQL, and when inserting, fill in defaults for
+  // fields that are not set.
+  foreach ($schema['fields'] as $field => $info) {
+    // Special case -- skip serial types if we are updating.
+    if ($info['type'] == 'serial' && count($update)) {
+      continue;
+    }
+
+    // For inserts, populate defaults from Schema if not already provided
+    if (!isset($object->$field) && !count($update) && isset($info['default'])) {
+      $object->$field = $info['default'];
+    }
+
+    // Track serial fields so we can helpfully populate them after the query.
+    if ($info['type'] == 'serial') {
+      $serials[] = $field;
+      // Ignore values for serials when inserting data. Unsupported.
+      unset($object->$field);
+    }
+
+    // Build arrays for the fields, placeholders, and values in our query.
+    if (isset($object->$field)) {
+      $fields[] = $field;
+      $placeholders[] = db_type_placeholder($info['type']);
+
+      if (empty($info['serialize'])) {
+        $values[] = $object->$field;
+      }
+      else {
+        $values[] = serialize($object->$field);
+      }
+    }
+  }
+
+  // Build the SQL.
+  $query = '';
+  if (!count($update)) {
+    $query = "INSERT INTO {". $table ."} (". implode(', ', $fields) .') VALUES ('. implode(', ', $placeholders) .')';
+    $return = SAVED_NEW;
+  }
+  else {
+    $query = '';
+    foreach ($fields as $id => $field) {
+      if ($query) {
+        $query .= ', ';
+      }
+      $query .= $field .' = '. $placeholders[$id];
+    }
+
+    foreach ($update as $key){
+      $conditions[] = "$key = ". db_type_placeholder($schema['fields'][$key]['type']);
+      $values[] = $object->$key;
+    }
+
+    $query = "UPDATE {". $table ."} SET $query WHERE ". implode(' AND ', $conditions);
+    $return = SAVED_UPDATED;
+  }
+
+  // Execute the SQL.
+  if (db_query($query, $values)) {
+    if ($serials) {
+      // Get last insert ids and fill them in.
+      foreach ($serials as $field) {
+        $object->$field = db_last_insert_id($table, $field);
+      }
+    }
+  }
+  else {
+    $return = FALSE;
+  }
+
+  // If we began with an array, convert back so we don't surprise the caller.
+  if ($array) {
+    $object = (array) $object;
+  }
+
+  return $return;
+}
+
+/**
+ * @} End of "ingroup schemaapi".
+ */
+
+/**
+ * Parse Drupal info file format.
+ *
+ * Files should use an ini-like format to specify values.
+ * White-space generally doesn't matter, except inside values.
+ * e.g.
+ *
+ * @verbatim
+ *   key = value
+ *   key = "value"
+ *   key = 'value'
+ *   key = "multi-line
+ *
+ *   value"
+ *   key = 'multi-line
+ *
+ *   value'
+ *   key
+ *   =
+ *   'value'
+ * @endverbatim
+ *
+ * Arrays are created using a GET-like syntax:
+ *
+ * @verbatim
+ *   key[] = "numeric array"
+ *   key[index] = "associative array"
+ *   key[index][] = "nested numeric array"
+ *   key[index][index] = "nested associative array"
+ * @endverbatim
+ *
+ * PHP constants are substituted in, but only when used as the entire value:
+ *
+ * Comments should start with a semi-colon at the beginning of a line.
+ *
+ * This function is NOT for placing arbitrary module-specific settings. Use
+ * variable_get() and variable_set() for that.
+ *
+ * Information stored in the module.info file:
+ * - name: The real name of the module for display purposes.
+ * - description: A brief description of the module.
+ * - dependencies: An array of shortnames of other modules this module depends on.
+ * - package: The name of the package of modules this module belongs to.
+ *
+ * Example of .info file:
+ * @verbatim
+ *   name = Forum
+ *   description = Enables threaded discussions about general topics.
+ *   dependencies[] = taxonomy
+ *   dependencies[] = comment
+ *   package = Core - optional
+ *   version = VERSION
+ * @endverbatim
+ *
+ * @param $filename
+ *   The file we are parsing. Accepts file with relative or absolute path.
+ * @return
+ *   The info array.
+ */
+function drupal_parse_info_file($filename) {
+  $info = array();
+
+  if (!file_exists($filename)) {
+    return $info;
+  }
+
+  $data = file_get_contents($filename);
+  if (preg_match_all('
+    @^\s*                           # Start at the beginning of a line, ignoring leading whitespace
+    ((?:
+      [^=;\[\]]|                    # Key names cannot contain equal signs, semi-colons or square brackets,
+      \[[^\[\]]*\]                  # unless they are balanced and not nested
+    )+?)
+    \s*=\s*                         # Key/value pairs are separated by equal signs (ignoring white-space)
+    (?:
+      ("(?:[^"]|(?<=\\\\)")*")|     # Double-quoted string, which may contain slash-escaped quotes/slashes
+      (\'(?:[^\']|(?<=\\\\)\')*\')| # Single-quoted string, which may contain slash-escaped quotes/slashes
+      ([^\r\n]*?)                   # Non-quoted string
+    )\s*$                           # Stop at the next end of a line, ignoring trailing whitespace
+    @msx', $data, $matches, PREG_SET_ORDER)) {
+    foreach ($matches as $match) {
+      // Fetch the key and value string
+      $i = 0;
+      foreach (array('key', 'value1', 'value2', 'value3') as $var) {
+        $$var = isset($match[++$i]) ? $match[$i] : '';
+      }
+      $value = stripslashes(substr($value1, 1, -1)) . stripslashes(substr($value2, 1, -1)) . $value3;
+
+      // Parse array syntax
+      $keys = preg_split('/\]?\[/', rtrim($key, ']'));
+      $last = array_pop($keys);
+      $parent = &$info;
+
+      // Create nested arrays
+      foreach ($keys as $key) {
+        if ($key == '') {
+          $key = count($parent);
+        }
+        if (!isset($parent[$key]) || !is_array($parent[$key])) {
+          $parent[$key] = array();
+        }
+        $parent = &$parent[$key];
+      }
+
+      // Handle PHP constants
+      if (defined($value)) {
+        $value = constant($value);
+      }
+
+      // Insert actual value
+      if ($last == '') {
+        $last = count($parent);
+      }
+      $parent[$last] = $value;
+    }
+  }
+
+  return $info;
+}
+
+/**
+ * @return
+ *   Array of the possible severity levels for log messages.
+ *
+ * @see watchdog
+ */
+function watchdog_severity_levels() {
+  return array(
+    WATCHDOG_EMERG    => t('emergency'),
+    WATCHDOG_ALERT    => t('alert'),
+    WATCHDOG_CRITICAL => t('critical'),
+    WATCHDOG_ERROR    => t('error'),
+    WATCHDOG_WARNING  => t('warning'),
+    WATCHDOG_NOTICE   => t('notice'),
+    WATCHDOG_INFO     => t('info'),
+    WATCHDOG_DEBUG    => t('debug'),
+  );
+}
+
+
+/**
+ * Explode a string of given tags into an array.
+ */
+function drupal_explode_tags($tags) {
+  // This regexp allows the following types of user input:
+  // this, "somecompany, llc", "and ""this"" w,o.rks", foo bar
+  $regexp = '%(?:^|,\ *)("(?>[^"]*)(?>""[^"]* )*"|(?: [^",]*))%x';
+  preg_match_all($regexp, $tags, $matches);
+  $typed_tags = array_unique($matches[1]);
+
+  $tags = array();
+  foreach ($typed_tags as $tag) {
+    // If a user has escaped a term (to demonstrate that it is a group,
+    // or includes a comma or quote character), we remove the escape
+    // formatting so to save the term into the database as the user intends.
+    $tag = trim(str_replace('""', '"', preg_replace('/^"(.*)"$/', '\1', $tag)));
+    if ($tag != "") {
+      $tags[] = $tag;
+    }
+  }
+
+  return $tags;
+}
+
+/**
+ * Implode an array of tags into a string.
+ */
+function drupal_implode_tags($tags) {
+  $encoded_tags = array();
+  foreach ($tags as $tag) {
+    // Commas and quotes in tag names are special cases, so encode them.
+    if (strpos($tag, ',') !== FALSE || strpos($tag, '"') !== FALSE) {
+      $tag = '"'. str_replace('"', '""', $tag) .'"';
+    }
+
+    $encoded_tags[] = $tag;
+  }
+  return implode(', ', $encoded_tags);
+}
+
+/**
+ * Flush all cached data on the site.
+ *
+ * Empties cache tables, rebuilds the menu cache and theme registries, and
+ * invokes a hook so that other modules' cache data can be cleared as well.
+ */
+function drupal_flush_all_caches() {
+  // Change query-strings on css/js files to enforce reload for all users.
+  _drupal_flush_css_js();
+
+  drupal_clear_css_cache();
+  drupal_clear_js_cache();
+
+  // If invoked from update.php, we must not update the theme information in the
+  // database, or this will result in all themes being disabled.
+  if (defined('MAINTENANCE_MODE') && MAINTENANCE_MODE == 'update') {
+    _system_theme_data();
+  }
+  else {
+    system_theme_data();
+  }
+
+  drupal_rebuild_theme_registry();
+  menu_rebuild();
+  node_types_rebuild();
+  // Don't clear cache_form - in-progress form submissions may break.
+  // Ordered so clearing the page cache will always be the last action.
+  $core = array('cache', 'cache_block', 'cache_filter', 'cache_page');
+  $cache_tables = array_merge(module_invoke_all('flush_caches'), $core);
+  foreach ($cache_tables as $table) {
+    cache_clear_all('*', $table, TRUE);
+  }
+}
+
+/**
+ * Helper function to change query-strings on css/js files.
+ *
+ * Changes the character added to all css/js files as dummy query-string,
+ * so that all browsers are forced to reload fresh files. We keep
+ * 20 characters history (FIFO) to avoid repeats, but only the first
+ * (newest) character is actually used on urls, to keep them short.
+ * This is also called from update.php.
+ */
+function _drupal_flush_css_js() {
+  $string_history = variable_get('css_js_query_string', '00000000000000000000');
+  $new_character = $string_history[0];
+  // Not including 'q' to allow certain JavaScripts to re-use query string.
+  $characters = 'abcdefghijklmnoprstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+  while (strpos($string_history, $new_character) !== FALSE) {
+    $new_character = $characters[mt_rand(0, strlen($characters) - 1)];
+  }
+  variable_set('css_js_query_string', $new_character . substr($string_history, 0, 19));
+}