function _compile_source($resource_name, &$source_content, &$compiled_content, $cache_include_path=null)
	{
		if (file_exists(SMARTY_DIR . $this->compiler_file)) {
			require_once(SMARTY_DIR . $this->compiler_file);
		} else {
			// use include_path
			require_once($this->compiler_file);
		}


		$smarty_compiler = new $this->compiler_class;

		$smarty_compiler->template_dir      = $this->template_dir;
		$smarty_compiler->compile_dir       = $this->compile_dir;
		$smarty_compiler->plugins_dir       = $this->plugins_dir;
		$smarty_compiler->config_dir        = $this->config_dir;
		$smarty_compiler->force_compile     = $this->force_compile;
		$smarty_compiler->caching           = $this->caching;
		$smarty_compiler->php_handling      = $this->php_handling;
		$smarty_compiler->left_delimiter    = $this->left_delimiter;
		$smarty_compiler->right_delimiter   = $this->right_delimiter;
		$smarty_compiler->_version          = $this->_version;
		$smarty_compiler->security          = $this->security;
		$smarty_compiler->secure_dir        = $this->secure_dir;
		$smarty_compiler->security_settings = $this->security_settings;
		$smarty_compiler->trusted_dir       = $this->trusted_dir;
		$smarty_compiler->use_sub_dirs      = $this->use_sub_dirs;
		$smarty_compiler->_reg_objects      = &$this->_reg_objects;
		$smarty_compiler->_plugins          = &$this->_plugins;
		$smarty_compiler->_tpl_vars         = &$this->_tpl_vars;
		$smarty_compiler->default_modifiers = $this->default_modifiers;
		$smarty_compiler->compile_id        = $this->_compile_id;
		$smarty_compiler->_config            = $this->_config;
		$smarty_compiler->request_use_auto_globals  = $this->request_use_auto_globals;

		if (isset($cache_include_path) && isset($this->_cache_serials[$cache_include_path])) {
			$smarty_compiler->_cache_serial = $this->_cache_serials[$cache_include_path];
		}
		$smarty_compiler->_cache_include = $cache_include_path;


		$_results = $smarty_compiler->_compile_file($resource_name, $source_content, $compiled_content);

		if ($smarty_compiler->_cache_serial) {
			$this->_cache_include_info = array(
                'cache_serial'=>$smarty_compiler->_cache_serial
			,'plugins_code'=>$smarty_compiler->_plugins_code
			,'include_file_path' => $cache_include_path);

		} else {
			$this->_cache_include_info = null;

		}

		return $_results;
	}