2 Copyright (C) 2016 Paul Brossier <piem@aubio.org>
4 This file is part of aubio.
6 aubio is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 aubio is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with aubio. If not, see <http://www.gnu.org/licenses/>.
32 This file specifies ::aubio_log_set_function and
33 ::aubio_log_set_level_function, which let you define one or several custom
34 logging functions to redirect warnings and errors from aubio to your
35 application. The custom function should have the prototype defined in
36 ::aubio_log_function_t.
38 After a call to ::aubio_log_set_level_function, ::aubio_log_reset can be used
39 to reset each logging functions to the default ones.
41 \example utils/test-log.c
45 /** list of logging levels */
46 enum aubio_log_level {
47 AUBIO_LOG_ERR, /**< critical errors */
48 AUBIO_LOG_WRN, /**< warnings */
49 AUBIO_LOG_MSG, /**< general messages */
50 AUBIO_LOG_DBG, /**< debug messages */
51 AUBIO_LOG_LAST_LEVEL, /**< number of valid levels */
54 /** Logging function prototype, to be passed to ::aubio_log_set_function
56 \param level log level
57 \param message text to log
58 \param data optional closure used by the callback
60 See @ref utils/test-log.c for an example of logging function.
63 typedef void (*aubio_log_function_t)(sint_t level, const char_t *message, void
66 /** Set logging function for all levels
68 \param fun the function to be used to log, of type ::aubio_log_function_t
69 \param data optional closure to be passed to the function (can be NULL if
73 void aubio_log_set_function(aubio_log_function_t fun, void* data);
75 /** Set logging function for a given level
77 \param level the level for which to set the logging function
78 \param fun the function to be used to log, of type ::aubio_log_function_t
79 \param data optional closure to be passed to the function (can be NULL if
83 aubio_log_function_t aubio_log_set_level_function(sint_t level,
84 aubio_log_function_t fun, void* data);
86 /** Reset all logging functions to the default one
88 After calling this function, the default logging function will be used to
89 print error, warning, normal, and debug messages to `stdout` or `stderr`.
92 void aubio_log_reset(void);
98 #endif /* AUBIO_LOG_H */