98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/* FluidSynth - A Software Synthesizer
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*
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* Copyright (C) 2003 Peter Hanappe and others.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#ifndef _FLUIDSYNTH_LOG_H
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#define _FLUIDSYNTH_LOG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @defgroup logging Logging
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*
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* Logging interface
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*
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* The default logging function of the fluidsynth prints its messages to the
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* stderr. The synthesizer uses five level of messages: #FLUID_PANIC,
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* #FLUID_ERR, #FLUID_WARN, #FLUID_INFO, and #FLUID_DBG.
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*
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* A client application can install a new log function to handle the messages
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* differently. In the following example, the application sets a callback
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* function to display #FLUID_PANIC messages in a dialog, and ignores all other
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* messages by setting the log function to NULL:
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*
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* @code
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* fluid_set_log_function(FLUID_PANIC, show_dialog, (void*) root_window);
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* fluid_set_log_function(FLUID_ERR, NULL, NULL);
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* fluid_set_log_function(FLUID_WARN, NULL, NULL);
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* fluid_set_log_function(FLUID_DBG, NULL, NULL);
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* @endcode
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*
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* @note The logging configuration is global and not tied to a specific
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* synthesizer instance. That means that all synthesizer instances created in
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* the same process share the same logging configuration.
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*
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* @{
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*/
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/**
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* FluidSynth log levels.
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*/
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enum fluid_log_level
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{
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FLUID_PANIC, /**< The synth can't function correctly any more */
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FLUID_ERR, /**< Serious error occurred */
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FLUID_WARN, /**< Warning */
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FLUID_INFO, /**< Verbose informational messages */
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FLUID_DBG, /**< Debugging messages */
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LAST_LOG_LEVEL /**< @internal This symbol is not part of the public API and ABI
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stability guarantee and may change at any time! */
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};
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/**
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* Log function handler callback type used by fluid_set_log_function().
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*
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* @param level Log level (#fluid_log_level)
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* @param message Log message text
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* @param data User data pointer supplied to fluid_set_log_function().
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*/
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typedef void (*fluid_log_function_t)(int level, const char *message, void *data);
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FLUIDSYNTH_API
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fluid_log_function_t fluid_set_log_function(int level, fluid_log_function_t fun, void *data);
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FLUIDSYNTH_API void fluid_default_log_function(int level, const char *message, void *data);
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FLUIDSYNTH_API int fluid_log(int level, const char *fmt, ...)
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#if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__)
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__attribute__ ((format (printf, 2, 3)))
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#endif
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;
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/* @} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FLUIDSYNTH_LOG_H */
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