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<?php
/**
* Autoloader
*
* @package Less
* @subpackage autoload
*/
class Less_Autoloader {
/**
* Registered flag
*
* @var boolean
*/
protected static $registered = false;
/**
* Library directory
*
* @var string
*/
protected static $libDir;
/**
* Register the autoloader in the spl autoloader
*
* @return void
* @throws Exception If there was an error in registration
*/
public static function register() {
if ( self::$registered ) {
return;
}
self::$libDir = dirname( __FILE__ );
if ( false === spl_autoload_register( array( 'Less_Autoloader', 'loadClass' ) ) ) {
throw new Exception( 'Unable to register Less_Autoloader::loadClass as an autoloading method.' );
}
self::$registered = true;
}
/**
* Unregisters the autoloader
*
* @return void
*/
public static function unregister() {
spl_autoload_unregister( array( 'Less_Autoloader', 'loadClass' ) );
self::$registered = false;
}
/**
* Loads the class
*
* @param string $className The class to load
*/
public static function loadClass( $className ) {
// handle only package classes
if ( strpos( $className, 'Less_' ) !== 0 ) {
return;
}
$className = substr( $className, 5 );
$fileName = self::$libDir . DIRECTORY_SEPARATOR . str_replace( '_', DIRECTORY_SEPARATOR, $className ) . '.php';
if ( file_exists( $fileName ) ) {
require $fileName;
return true;
} else {
throw new Exception( 'file not loadable '.$fileName );
}
}
}
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