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 
9 #pragma once
10 
35 #ifdef __cplusplus
36 extern "C" {
37 #endif
38 
51 enum {
52  LOG_NONE,
53  LOG_ERROR,
56  LOG_WARNING,
58  LOG_INFO,
61  LOG_DEBUG,
63  LOG_ALL
64 };
65 
66 #ifndef LOG_LEVEL
70 #define LOG_LEVEL LOG_INFO
71 #endif
72 
76 #ifdef __clang__ /* following pragmas required for clang 3.8.0 */
77 #define LOG(level, ...) do { \
78  _Pragma("clang diagnostic push") \
79  _Pragma("clang diagnostic ignored \"-Wtautological-compare\"") \
80  if ((level) <= LOG_LEVEL) log_write((level), __VA_ARGS__); } while (0U) \
81  _Pragma("clang diagnostic pop")
82 #else
83 #define LOG(level, ...) do { \
84  if ((level) <= LOG_LEVEL) log_write((level), __VA_ARGS__); } while (0U)
85 #endif /* __clang__ */
86 
91 #define LOG_ERROR(...) LOG(LOG_ERROR, __VA_ARGS__)
92 #define LOG_WARNING(...) LOG(LOG_WARNING, __VA_ARGS__)
93 #define LOG_INFO(...) LOG(LOG_INFO, __VA_ARGS__)
108 #define LOG_DEBUG(...) LOG(LOG_DEBUG, __VA_ARGS__)
111 #ifdef MODULE_LOG
112 #include "log_module.h"
113 #else
114 #include <stdio.h>
115 
119 #define log_write(level, ...) printf(__VA_ARGS__)
120 #endif
121 
122 #ifdef __cplusplus
123 }
124 #endif
125 
LOG_INFO
#define LOG_INFO(...)
for the curious
Definition: log.h:93
LOG_DEBUG
#define LOG_DEBUG(...)
Print a log message, if LOG_LEVEL is defined to be at least LOG_DEBUG
Definition: log.h:108
LOG_NONE
@ LOG_NONE
Lowest log level, will output nothing.
Definition: log.h:52
LOG_ALL
@ LOG_ALL
print everything
Definition: log.h:63
LOG_ERROR
#define LOG_ERROR(...)
log an error
Definition: log.h:91
LOG_WARNING
#define LOG_WARNING(...)
log a warning
Definition: log.h:92