<?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()
{
$autoload = array('HTMLPurifier_Bootstrap', 'autoload');
if (spl_autoload_functions() === false) {
spl_autoload_register($autoload);
} else {
// prepend flag exists, no need for shenanigans
spl_autoload_register($autoload, true, true);
}
}
}
// vim: et sw=4 sts=4
