log.h
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1 /*
2  * Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
3  *
4  * This file is subject to the terms and conditions of the GNU Lesser
5  * General Public License v2.1. See the file LICENSE in the top level
6  * directory for more details.
7  */
8 
33 #ifndef LOG_H
34 #define LOG_H
35 
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
39 
52 enum {
53  LOG_NONE,
54  LOG_ERROR,
57  LOG_WARNING,
59  LOG_INFO,
62  LOG_DEBUG,
64  LOG_ALL
65 };
66 
67 #ifndef LOG_LEVEL
71 #define LOG_LEVEL LOG_INFO
72 #endif
73 
77 #ifdef __clang__ /* following pragmas required for clang 3.8.0 */
78 #define LOG(level, ...) do { \
79  _Pragma("clang diagnostic push") \
80  _Pragma("clang diagnostic ignored \"-Wtautological-compare\"") \
81  if ((level) <= LOG_LEVEL) log_write((level), __VA_ARGS__); } while (0U) \
82  _Pragma("clang diagnostic pop")
83 #else
84 #define LOG(level, ...) do { \
85  if ((level) <= LOG_LEVEL) log_write((level), __VA_ARGS__); } while (0U)
86 #endif /* __clang__ */
87 
92 #define LOG_ERROR(...) LOG(LOG_ERROR, __VA_ARGS__)
93 #define LOG_WARNING(...) LOG(LOG_WARNING, __VA_ARGS__)
94 #define LOG_INFO(...) LOG(LOG_INFO, __VA_ARGS__)
109 #define LOG_DEBUG(...) LOG(LOG_DEBUG, __VA_ARGS__)
112 #ifdef MODULE_LOG
113 #include "log_module.h"
114 #else
115 #include <stdio.h>
116 
120 #define log_write(level, ...) printf(__VA_ARGS__)
121 #endif
122 
123 #ifdef __cplusplus
124 }
125 #endif
126 
127 #endif /* LOG_H */
LOG_INFO
#define LOG_INFO(...)
for the curious
Definition: log.h:94
LOG_DEBUG
#define LOG_DEBUG(...)
Print a log message, if LOG_LEVEL is defined to be at least LOG_DEBUG
Definition: log.h:109
LOG_NONE
@ LOG_NONE
Lowest log level, will output nothing.
Definition: log.h:53
LOG_ALL
@ LOG_ALL
print everything
Definition: log.h:64
LOG_ERROR
#define LOG_ERROR(...)
log an error
Definition: log.h:92
LOG_WARNING
#define LOG_WARNING(...)
log a warning
Definition: log.h:93
stdio.h
stdio wrapper to extend the C libs stdio