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log.h
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1/*
2 * SPDX-FileCopyrightText: 2015 Kaspar Schleiser <kaspar@schleiser.de>
3 * SPDX-License-Identifier: LGPL-2.1-only
4 */
5
6#pragma once
7
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
51enum {
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
78#ifdef LOG_UNIT
79# define LOG_WRITE(level, fmt, ...) log_write((level), "%s: "fmt, LOG_UNIT, ##__VA_ARGS__)
80#else
81# define LOG_WRITE(level, ...) log_write((level), __VA_ARGS__)
82#endif
83
87#ifdef __clang__ /* following pragmas required for clang 3.8.0 */
88#define LOG(level, ...) do { \
89 _Pragma("clang diagnostic push") \
90 _Pragma("clang diagnostic ignored \"-Wtautological-compare\"") \
91 if ((level) <= LOG_LEVEL) LOG_WRITE((level), __VA_ARGS__); } while (0U) \
92 _Pragma("clang diagnostic pop")
93#else
94#define LOG(level, ...) do { \
95 if ((level) <= LOG_LEVEL) LOG_WRITE((level), __VA_ARGS__); } while (0U)
96#endif /* __clang__ */
97
102#define LOG_ERROR(...) LOG(LOG_ERROR, __VA_ARGS__)
103#define LOG_WARNING(...) LOG(LOG_WARNING, __VA_ARGS__)
104#define LOG_INFO(...) LOG(LOG_INFO, __VA_ARGS__)
119#define LOG_DEBUG(...) LOG(LOG_DEBUG, __VA_ARGS__)
121
122#ifdef MODULE_LOG
123#include "log_module.h"
124#else
125#include <stdio.h>
126
130#define log_write(level, ...) printf(__VA_ARGS__)
131#endif
132
133#ifdef __cplusplus
134}
135#endif
136
LOG_INFO
#define LOG_INFO(...)
for the curious
Definition log.h:104
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_DEBUG
#define LOG_DEBUG(...)
Print a log message, if LOG_LEVEL is defined to be at least LOG_DEBUG
Definition log.h:119
LOG_ERROR
#define LOG_ERROR(...)
log an error
Definition log.h:102
LOG_WARNING
#define LOG_WARNING(...)
log a warning
Definition log.h:103