text: /*
   * Copyright (C) 2008 Martin Willi
   * Hochschule fuer Technik Rapperswil
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License as published by the
   * Free Software Foundation; either version 2 of the License, or (at your
   * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   *
   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * for more details.
   */
  
  /**
   * @defgroup fetcher_manager fetcher_manager
   * @{ @ingroup fetcher
   */
  
  #ifndef FETCHER_MANAGER_H_
  #define FETCHER_MANAGER_H_
  
  typedef struct fetcher_manager_t fetcher_manager_t;
  
  #include <fetcher/fetcher.h>
  
  /**
   * Fetches from URIs using registered fetcher_t instances.
   */
  struct fetcher_manager_t {
  
  	/**
  	 * Fetch data from URI.
  	 *
  	 * The variable argument list contains fetcher_option_t's, followed
  	 * by a option specific data argument.
  	 * If no FETCH_CALLBACK function is given as option, userdata must be
  	 * a chunk_t*. This chunk gets allocated, accumulated data using the
  	 * fetcher_default_callback() function.
  	 *
  	 * @param uri			URI to fetch from
  	 * @param userdata		userdata to pass to callback function.
  	 * @param options		FETCH_END terminated fetcher_option_t arguments
  	 * @return				status indicating result of fetch
  	 */
  	status_t (*fetch)(fetcher_manager_t *this, char *url, void *userdata, ...);
  
  	/**
  	 * Register a fetcher implementation.
  	 *
  	 * @param constructor	fetcher constructor function
  	 * @param url			URL type this fetcher fetches, e.g. "http://"
  	 */
  	void (*add_fetcher)(fetcher_manager_t *this,
  						fetcher_constructor_t constructor, char *url);
  
  	/**
  	 * Unregister a previously registered fetcher implementation.
  	 *
  	 * @param constructor	fetcher constructor function to unregister
  	 */
  	void (*remove_fetcher)(fetcher_manager_t *this,
  						   fetcher_constructor_t constructor);
  
  	/**
  	 * Destroy a fetcher_manager instance.
  	 */
  	void (*destroy)(fetcher_manager_t *this);
  };
  
  /**
   * Create a fetcher_manager instance.
   */
  fetcher_manager_t *fetcher_manager_create();
  
  #endif /** FETCHER_MANAGER_H_ @}*/
  