text: /*****************************************************************************
   * vlc_messages.h: messages interface
   * This library provides basic functions for threads to interact with user
   * interface, such as message output.
   *****************************************************************************
   * Copyright (C) 1999, 2000, 2001, 2002 VLC authors and VideoLAN
   * $Id: f746f61c09afd91f89dee61340a1d090bd96416c $
   *
   * Authors: Vincent Seguin <seguin@via.ecp.fr>
   *          Samuel Hocevar <sam@zoy.org>
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * 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 Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with this program; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
   *****************************************************************************/
  
  #ifndef VLC_MESSAGES_H_
  #define VLC_MESSAGES_H_
  
  /**
   * \file
   * This file defines structures and functions to handle messages and statistics gathering
   */
  
  #include <stdarg.h>
  
  /**
   * \defgroup messages Messages
   * This library provides basic functions for threads to interact with user
   * interface, such as message output.
   *
   * @{
   */
  
  /** Message types */
  enum vlc_log_type
  {
      VLC_MSG_INFO=0, /**< Important information */
      VLC_MSG_ERR,    /**< Error */
      VLC_MSG_WARN,   /**< Warning */
      VLC_MSG_DBG,    /**< Debug */
  };
  
  /**
   * Log message
   */
  typedef struct vlc_log_t
  {
      uintptr_t   i_object_id; /**< Emitter (temporaly) unique object ID or 0 */
      const char *psz_object_type; /**< Emitter object type name */
      const char *psz_module; /**< Emitter module (source code) */
      const char *psz_header; /**< Additional header (used by VLM media) */
  } vlc_log_t;
  
  VLC_API void vlc_Log(vlc_object_t *, int,
                       const char *, const char *, ...) VLC_FORMAT( 4, 5 );
  VLC_API void vlc_vaLog(vlc_object_t *, int,
                         const char *, const char *, va_list);
  #define msg_GenericVa(a, b, c, d, e) vlc_vaLog(VLC_OBJECT(a), b, c, d, e)
  
  #define msg_Info( p_this, ... ) \
      vlc_Log( VLC_OBJECT(p_this), VLC_MSG_INFO, MODULE_STRING, __VA_ARGS__ )
  #define msg_Err( p_this, ... ) \
      vlc_Log( VLC_OBJECT(p_this), VLC_MSG_ERR,  MODULE_STRING, __VA_ARGS__ )
  #define msg_Warn( p_this, ... ) \
      vlc_Log( VLC_OBJECT(p_this), VLC_MSG_WARN, MODULE_STRING, __VA_ARGS__ )
  #define msg_Dbg( p_this, ... ) \
      vlc_Log( VLC_OBJECT(p_this), VLC_MSG_DBG,  MODULE_STRING, __VA_ARGS__ )
  
  #ifndef MODULE_STRING
  # define MODULE_STRING __FILE__
  #endif
  
  VLC_API const char *vlc_strerror(int);
  VLC_API const char *vlc_strerror_c(int);
  
  /**
   * @}
   */
  #endif
  