log.h

#ifndef __LOG_H__
#define __LOG_H__

#include <stdio.h>
#include <stdlib.h> // exit()
#include <stdint.h> // uint8_t
#include <stdbool.h> // bool, true, false
#include <string.h> // strerror()
#include <time.h> // time(), strftime(), localtime()
#include <errno.h> // errno

#define TIME_FORMAT "%Y-%m-%d %H:%M:%S" // e.g. 2021-01-04 01:10:38

#define logger(fmt, ...)                                    \
    do {                                                    \
        time_t now = time(NULL);                            \
        char timestr[20];                                   \
        strftime(timestr, 20, TIME_FORMAT, localtime(&now));\
        printf("%s " fmt "\n", timestr, ##__VA_ARGS__);     \
    } while (0)

#define error(fmt, ...) logger("ERROR: %s:%d %s(): " fmt ": %s", __FILE__, __LINE__, __FUNCTION__, ##__VA_ARGS__, strerror(errno))
#define warn(fmt, ...)  logger("WARN: %s:%d %s(): " fmt, __FILE__, __LINE__, __FUNCTION__, ##__VA_ARGS__)
#define info(fmt, ...)  logger("INFO: %s:%d %s(): " fmt, __FILE__, __LINE__, __FUNCTION__, ##__VA_ARGS__)
#define info_mem(p, l)  memdump(p, l);

#ifdef DEBUG
#define debug(fmt, ...) logger("DEBUG: %s:%d %s(): " fmt, __FILE__, __LINE__, __FUNCTION__, ##__VA_ARGS__)
#define debug_mem(p, l) memdump(p, l);
#else
#define debug(fmt, ...)
#define debug_mem(p, l)
#endif

#define breakpoint()                         \
    do {                                     \
        puts("Press any key to continue...");\
        getchar();                           \
    } while (0)

#endif /* __LOG_H__ */