A small debug print header

dbg.h

/*
    Small debug print header file inspired from book 'Learn C the Hard Way'
    Usage:
        - To use `dbg_debug()`, add -DDBG as compiler flag
        - `dbg_info`, `dbg_warn`, `dbg_error` is for logging
        - `dbg_test(EXPR, MESSAGE, ...)` tests EXPR, if not true, then it print MESSAGE and jump to label `error`,
            where you can handle the failed test.
        - `dbg_test_panic(EXPR, MESSAGE, ...)` tests EXPR, if not true, then it print MESSAGE and aborts.
        - Example code:
            #include "dbg.h"

            int main(int argc, char* argv[]){
                int x = 5;
                int y = 5;

                dbg_test(x == y, "X == Y"); // jumps to error label if x != y
                dbg_debug("X: %d, Y: %d", 5, 5);
                dbg_info("Some information%c", '!');
                dbg_warn("WARNINGIN!");
                dbg_error("*(^*&435GUYGUG&^$^YTFG564&!");
                dbg_test_panic(x == y, "hmmmmmm"); // aborts if x != y
                return 0;

                error:
                    fprintf(stderr, "Oh dear\n");
                    return -1;
            }
*/

#ifndef DBG_H
#define DBG_H

#include <stdlib.h>
#include <errno.h>
#include <string.h>

#ifdef DBG
    #define dbg_debug(M, ...) fprintf(stderr, "[DEBUG]:\n    %s: %s: %d: " M "\n",\
        __FILE__, __func__, __LINE__, ##__VA_ARGS__)
#else
    #define dbg_debug(M, ...)
#endif

#define get_error_str() (errno == 0 ? "NONE" : strerror(errno))

#define blue(M) "\033[96m" M "\033[0m"
#define yellow(M) "\033[93m" M "\033[0m"
#define red(M) "\033[31m" M "\033[0m"

#define dbg_info(M, ...) fprintf(stderr, blue("[INFO]") ":\n    %s: %s: %d: " M "\n",\
        __FILE__, __func__, __LINE__, ##__VA_ARGS__)

#define dbg_warn(M, ...) fprintf(stderr, yellow("[WARN, ERRNO: %s]") ":\n    %s: %s: %d: " M "\n",\
        get_error_str(), __FILE__, __func__, __LINE__, ##__VA_ARGS__)

#define dbg_error(M, ...) fprintf(stderr, red("[ERROR, ERRNO: %s]") ":\n    %s: %s: %d: " M "\n",\
        get_error_str(), __FILE__, __func__, __LINE__, ##__VA_ARGS__)

#define dbg_test(B, M, ...) if(!(B)){\
        fprintf(stderr, red("[TEST] '" #B "' failed") ":\n    %s: %s: %d: " M "\n",\
        __FILE__, __func__, __LINE__, ##__VA_ARGS__); errno = 0; goto error;}

#define dbg_test_panic(B, M, ...) if(!(B)){\
        fprintf(stderr, red("[TEST PANIC] '" #B "' failed") ":\n    %s: %s: %d: " M "\n",\
        __FILE__, __func__, __LINE__, ##__VA_ARGS__); abort();}

#endif