log.h

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#ifndef CFG_LOG_H
#define CFG_LOG_H

#include <cfg/debug.h>

// Use a default setting if nobody defined a log level
#ifndef LOG_LEVEL
#define LOG_LEVEL       LOG_LVL_ERR
#endif

// Use a default setting if nobody defined a log format
#ifndef LOG_FORMAT
#define LOG_FORMAT      LOG_FMT_TERSE
#endif

#define LOG_LVL_NONE      0
#define LOG_LVL_ERR       1
#define LOG_LVL_WARN      2
#define LOG_LVL_INFO      3

#define LOG_FMT_VERBOSE   1
#define LOG_FMT_TERSE     0

#if LOG_FORMAT == LOG_FMT_VERBOSE
    #define LOG_PRINT(str_level, str,...)    kprintf("%s():%d:%s: " str, __func__, __LINE__, str_level, ## __VA_ARGS__)
#elif LOG_FORMAT == LOG_FMT_TERSE
    #define LOG_PRINT(str_level, str,...)    kprintf("%s: " str, str_level, ## __VA_ARGS__)
#else
    #error No LOG_FORMAT defined
#endif

#if LOG_LEVEL >= LOG_LVL_ERR

    #define LOG_ERR(str,...)       LOG_PRINT("ERR", str, ## __VA_ARGS__)

    #define LOG_ERRB(x)            x
#else
    INLINE void LOG_ERR(UNUSED_ARG(const char *, fmt), ...) { /* nop */ }
    #define LOG_ERRB(x)            /* Nothing */
#endif

#if LOG_LEVEL >= LOG_LVL_WARN

    #define LOG_WARN(str,...)       LOG_PRINT("WARN", str, ## __VA_ARGS__)

    #define LOG_WARNB(x)            x
#else
    INLINE void LOG_WARN(UNUSED_ARG(const char *, fmt), ...) { /* nop */ }
    #define LOG_WARNB(x)            /* Nothing */
#endif

#if LOG_LEVEL >= LOG_LVL_INFO

    #define LOG_INFO(str,...)       LOG_PRINT("INFO", str, ## __VA_ARGS__)

    #define LOG_INFOB(x)            x
#else
    INLINE void LOG_INFO(UNUSED_ARG(const char *, fmt), ...) { /* nop */ }
    #define LOG_INFOB(x)            /* Nothing */
#endif

#endif /* CFG_LOG_H */