text: /* FluidSynth - A Software Synthesizer
   *
   * Copyright (C) 2003  Peter Hanappe and others.
   *
   * This library 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 library 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 library; if not, write to the Free
   * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   * 02110-1301, USA
   */
  
  #ifndef _FLUIDSYNTH_LOG_H
  #define _FLUIDSYNTH_LOG_H
  
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  
  /**
   * @file log.h
   * @brief Logging interface
   *
   * The default logging function of the fluidsynth prints its messages
   * to the stderr. The synthesizer uses five level of messages: #FLUID_PANIC,
   * #FLUID_ERR, #FLUID_WARN, #FLUID_INFO, and #FLUID_DBG.
   *
   * A client application can install a new log function to handle the
   * messages differently. In the following example, the application
   * sets a callback function to display #FLUID_PANIC messages in a dialog,
   * and ignores all other messages by setting the log function to
   * NULL:
   *
   * @code
   *   fluid_set_log_function(FLUID_PANIC, show_dialog, (void*) root_window);
   *   fluid_set_log_function(FLUID_ERR, NULL, NULL);
   *   fluid_set_log_function(FLUID_WARN, NULL, NULL);
   *   fluid_set_log_function(FLUID_DBG, NULL, NULL);
   * @endcode
   */
  
  /**
   * FluidSynth log levels.
   */
  enum fluid_log_level { 
    FLUID_PANIC,   /**< The synth can't function correctly any more */
    FLUID_ERR,     /**< Serious error occurred */
    FLUID_WARN,    /**< Warning */
    FLUID_INFO,    /**< Verbose informational messages */
    FLUID_DBG,     /**< Debugging messages */
    LAST_LOG_LEVEL /**< @deprecated As of 1.1.7 this enum value is deprecated and will be removed in a future release, because it prevents adding new enum values without breaking ABI compatibility. */
  };
  
  /**
   * Log function handler callback type used by fluid_set_log_function().
   * @param level Log level (#fluid_log_level)
   * @param message Log message text
   * @param data User data pointer supplied to fluid_set_log_function().
   */
  typedef void (*fluid_log_function_t)(int level, char* message, void* data);
  
  FLUIDSYNTH_API 
  fluid_log_function_t fluid_set_log_function(int level, fluid_log_function_t fun, void* data);
  
  FLUIDSYNTH_API void fluid_default_log_function(int level, char* message, void* data);
  
  FLUIDSYNTH_API int fluid_log(int level, const char *fmt, ...);
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* _FLUIDSYNTH_LOG_H */
  