File indexing completed on 2024-04-28 05:58:53

 <?php
 
 // constants are slow, so we use as few as possible
 if (!defined('HTMLPURIFIER_PREFIX')) {
     define('HTMLPURIFIER_PREFIX', realpath(dirname(__FILE__) . '/..'));
 }
 
 // accomodations for versions earlier than 5.0.2
 // borrowed from PHP_Compat, LGPL licensed, by Aidan Lister <aidan@php.net>
 if (!defined('PHP_EOL')) {
     switch (strtoupper(substr(PHP_OS, 0, 3))) {
         case 'WIN':
             define('PHP_EOL', "\r\n");
             break;
         case 'DAR':
             define('PHP_EOL', "\r");
             break;
         default:
             define('PHP_EOL', "\n");
     }
 }
 
 /**
  * Bootstrap class that contains meta-functionality for HTML Purifier such as
  * the autoload function.
  *
  * @note
  *      This class may be used without any other files from HTML Purifier.
  */
 class HTMLPurifier_Bootstrap
 {
 
     /**
      * Autoload function for HTML Purifier
      * @param string $class Class to load
      * @return bool
      */
     public static function autoload($class)
     {
         $file = HTMLPurifier_Bootstrap::getPath($class);
         if (!$file) {
             return false;
         }
         // Technically speaking, it should be ok and more efficient to
         // just do 'require', but Antonio Parraga reports that with
         // Zend extensions such as Zend debugger and APC, this invariant
         // may be broken.  Since we have efficient alternatives, pay
         // the cost here and avoid the bug.
         require_once HTMLPURIFIER_PREFIX . '/' . $file;
         return true;
     }
 
     /**
      * Returns the path for a specific class.
      * @param string $class Class path to get
      * @return string
      */
     public static function getPath($class)
     {
         if (strncmp('HTMLPurifier', $class, 12) !== 0) {
             return false;
         }
         // Custom implementations
         if (strncmp('HTMLPurifier_Language_', $class, 22) === 0) {
             $code = str_replace('_', '-', substr($class, 22));
             $file = 'HTMLPurifier/Language/classes/' . $code . '.php';
         } else {
             $file = str_replace('_', '/', $class) . '.php';
         }
         if (!file_exists(HTMLPURIFIER_PREFIX . '/' . $file)) {
             return false;
         }
         return $file;
     }
 
     /**
      * "Pre-registers" our autoloader on the SPL stack.
      */
     public static function registerAutoload()
     {
         $autoload = array('HTMLPurifier_Bootstrap', 'autoload');
         if (($funcs = spl_autoload_functions()) === false) {
             spl_autoload_register($autoload);
         } elseif (function_exists('spl_autoload_unregister')) {
             if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
                 // prepend flag exists, no need for shenanigans
                 spl_autoload_register($autoload, true, true);
             } else {
                 $buggy  = version_compare(PHP_VERSION, '5.2.11', '<');
                 $compat = version_compare(PHP_VERSION, '5.1.2', '<=') &&
                           version_compare(PHP_VERSION, '5.1.0', '>=');
                 foreach ($funcs as $func) {
                     if ($buggy && is_array($func)) {
                         // :TRICKY: There are some compatibility issues and some
                         // places where we need to error out
                         $reflector = new ReflectionMethod($func[0], $func[1]);
                         if (!$reflector->isStatic()) {
                             throw new Exception(
                                 'HTML Purifier autoloader registrar is not compatible
                                 with non-static object methods due to PHP Bug #44144;
                                 Please do not use HTMLPurifier.autoload.php (or any
                                 file that includes this file); instead, place the code:
                                 spl_autoload_register(array(\'HTMLPurifier_Bootstrap\', \'autoload\'))
                                 after your own autoloaders.'
                             );
                         }
                         // Suprisingly, spl_autoload_register supports the
                         // Class::staticMethod callback format, although call_user_func doesn't
                         if ($compat) {
                             $func = implode('::', $func);
                         }
                     }
                     spl_autoload_unregister($func);
                 }
                 spl_autoload_register($autoload);
                 foreach ($funcs as $func) {
                     spl_autoload_register($func);
                 }
             }
         }
     }
 }
 
 // vim: et sw=4 sts=4