a macro logger for c

logger.c

#include "logger.h"


int DebugLevel = DEBUG_WARN;

int main(void)
{
	DBGPRINT(DEBUG_WARN, ("hello,debug=%s\n", "aaa"));
	return 0;
}

logger.h

#ifndef LOGGER_H
#define LOGGER_H

#include <stdio.h>

//want to enable debug
#ifndef DBG
#define DBG
#endif

// Debug information verbosity: lower values indicate higher urgency
#define DEBUG_OFF 0
#define DEBUG_ERROR 1
#define DEBUG_WARN 2
#define DEBUG_TRACE 3
#define DEBUG_INFO 4
#define DEBUG_VERB 5

#ifdef DBG
extern int DebugLevel;

#define DBGPRINT_RAW(Level, Fmt) \
do { \
    if (Level <= DebugLevel) \
    { \
        printf Fmt; \
    } \
} while(0)

#define DBGPRINT(Level, Fmt) DBGPRINT_RAW(Level, Fmt)

#define DBGPRINT_ERR(Fmt) \
{ \
    printf("ERROR!!! "); \
    printf Fmt; \
}


#else

#define DBGPRINT(Level, Fmt)
#define DBGPRINT_RAW(Level, Fmt)
#define DBGPRINT_ERR(Fmt)

#endif

#endif