C debug macros

dbg.h

#ifndef DBG_H
#define DBG_H

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

#ifdef NDEBUG
#  define DEBUG(M, ...)
#else
#  define DEBUG(M, ...) fprintf( \
        stderr, \
        "DEBUG %s:%d: " M "\n", \
        __FILE__, \
        __LINE__, \
        ##__VA_ARGS__ \
   )
#endif

#define CLEAN_ERRNO() (errno == 0 ? "None" : strerror(errno))

#define LOG_ERR(M, ...) fprintf( \
        stderr, \
        "[ERROR] (%s:%d: errno: %s) " M "\n", \
        __FILE__, \
        __LINE__, \
        CLEAN_ERRNO(), \
        ##__VA_ARGS__  \
   )

#define LOG_WARN(M, ...) fprintf( \
        stderr, \
        "[WARN] (%s:%d: errno: %s) " M "\n", \
        __FILE__, \
        __LINE__, \
        CLEAN_ERRNO(), \
        ##__VA_ARGS__ \
   )

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

#define CHECK(A, M, ...) if(!(A)) { \
        LOG_ERR(M, ##__VA_ARGS__); \
        errno = 0; \
        goto error; \
    }

#define SENTINEL(M, ...) { \
        LOG_ERR(M, ##__VA_ARGS__); \
        errno = 0; \
        goto error; \
    }

#define CHECK_MEM(A) CHECK((A), "Out of memory.")

#define CHECK_DEBUG(A, M, ...) if(!(A)) { \
        DEBUG(M, ##__VA_ARGS__); \
        errno = 0; \
        goto error; \
    }

#endif // DBG_H