clibs_logging.h

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#ifndef CLIBS_LOGGING_H
#define CLIBS_LOGGING_H
 
#include <stdio.h>
 
#ifdef __cplusplus
extern "C" {
#endif

#define CLIBS_LOG_LEVEL_NONE   0
#define CLIBS_LOG_LEVEL_FATAL  1
#define CLIBS_LOG_LEVEL_ERROR  2
#define CLIBS_LOG_LEVEL_WARN   3
#define CLIBS_LOG_LEVEL_INFO   4
#define CLIBS_LOG_LEVEL_DEBUG  5

#ifndef CLIBS_LOG_LEVEL
#define CLIBS_LOG_LEVEL CLIBS_LOG_LEVEL_NONE
#endif

void clibs_set_output(FILE *out, FILE *err);

FILE *clibs_get_out(void);

FILE *clibs_get_err(void);

#if CLIBS_LOG_LEVEL >= CLIBS_LOG_LEVEL_DEBUG
#define CLIBS_LOG_DEBUG(fmt, ...)                                           \
    do {                                                                    \
        fprintf(clibs_get_err(), "[DEBUG] (%s:%d) " fmt "\n",               \
                __FILE__, __LINE__, ##__VA_ARGS__);                         \
    } while (0)
#else
#define CLIBS_LOG_DEBUG(...) ((void)0)
#endif

#if CLIBS_LOG_LEVEL >= CLIBS_LOG_LEVEL_INFO
#define CLIBS_LOG_INFO(fmt, ...)                                            \
    do {                                                                    \
        fprintf(clibs_get_err(), "[INFO] " fmt "\n", ##__VA_ARGS__);        \
    } while (0)
#else
#define CLIBS_LOG_INFO(...) ((void)0)
#endif

#if CLIBS_LOG_LEVEL >= CLIBS_LOG_LEVEL_WARN
#define CLIBS_LOG_WARN(fmt, ...)                                            \
    do {                                                                    \
        fprintf(clibs_get_err(), "[WARN] " fmt "\n", ##__VA_ARGS__);        \
    } while (0)
#else
#define CLIBS_LOG_WARN(...) ((void)0)
#endif

#if CLIBS_LOG_LEVEL >= CLIBS_LOG_LEVEL_ERROR
#define CLIBS_LOG_ERROR(fmt, ...)                                           \
    do {                                                                    \
        fprintf(clibs_get_err(), "[ERROR] " fmt "\n", ##__VA_ARGS__);       \
    } while (0)
#else
#define CLIBS_LOG_ERROR(...) ((void)0)
#endif

#if CLIBS_LOG_LEVEL >= CLIBS_LOG_LEVEL_FATAL
#define CLIBS_LOG_FATAL(fmt, ...)                                           \
    do {                                                                    \
        fprintf(clibs_get_err(), "[FATAL] (%s:%d) " fmt "\n",               \
                __FILE__, __LINE__, ##__VA_ARGS__);                         \
    } while (0)
#else
#define CLIBS_LOG_FATAL(...) ((void)0)
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif /* CLIBS_LOGGING_H */