ref: c60e048f3aba852710b9763a6fb24adad2017f40
dir: /src/utils/log.h/
/*
Copyright (C) 2016 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio 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 3 of the License, or
(at your option) any later version.
aubio 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.
You should have received a copy of the GNU General Public License
along with aubio. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef AUBIO_LOG_H
#define AUBIO_LOG_H
#ifdef __cplusplus
extern "C" {
#endif
/** \file
Logging features
This file specifies ::aubio_log_set_function and
::aubio_log_set_level_function, which let you define one or several custom
logging functions to redirect warnings and errors from aubio to your
application. The custom function should have the prototype defined in
::aubio_log_function_t.
After a call to ::aubio_log_set_level_function, ::aubio_log_reset can be used
to reset each logging functions to the default ones.
\example utils/test-log.c
*/
/** list of logging levels */
enum aubio_log_level {
AUBIO_LOG_ERR, /**< critical errors */
AUBIO_LOG_INF, /**< infos */
AUBIO_LOG_MSG, /**< general messages */
AUBIO_LOG_DBG, /**< debug messages */
AUBIO_LOG_WRN, /**< warnings */
AUBIO_LOG_LAST_LEVEL, /**< number of valid levels */
};
/** Logging function prototype, to be passed to ::aubio_log_set_function
\param level log level
\param message text to log
\param data optional closure used by the callback
See @ref utils/test-log.c for an example of logging function.
*/
typedef void (*aubio_log_function_t)(sint_t level, const char_t *message, void
*data);
/** Set logging function for all levels
\param fun the function to be used to log, of type ::aubio_log_function_t
\param data optional closure to be passed to the function (can be NULL if
nothing to pass)
*/
void aubio_log_set_function(aubio_log_function_t fun, void* data);
/** Set logging function for a given level
\param level the level for which to set the logging function
\param fun the function to be used to log, of type ::aubio_log_function_t
\param data optional closure to be passed to the function (can be NULL if
nothing to pass)
*/
aubio_log_function_t aubio_log_set_level_function(sint_t level,
aubio_log_function_t fun, void* data);
/** Reset all logging functions to the default one
After calling this function, the default logging function will be used to
print error, warning, normal, and debug messages to `stdout` or `stderr`.
*/
void aubio_log_reset(void);
#ifdef __cplusplus
}
#endif
#endif /* AUBIO_LOG_H */