Debug Macro

January 10, 2013

Code slice

#define debug(fmt,...) do {                                             \
    fprintf(stderr,"[ DEBUG ] : [ %s, %d ] ",__FILE__,__LINE__);    \
    fprintf(stderr,fmt,##__VA_ARGS__);                              \
    fprintf(stderr,"\n");                                           \
} while(0)

How to use

#include <stdio.h>

#define debug(fmt,...) do {                                             \
    fprintf(stderr,"[ DEBUG ] : [ %s, %d ] ",__FILE__,__LINE__);    \
    fprintf(stderr,fmt,##__VA_ARGS__);                              \
    fprintf(stderr,"\n");                                           \
} while(0)

int main(int argc, char** argv)
{
    debug("this is a debug sample with <%d> args", argc);
    debug("debug sample exit.");
    return 0;
}

Output of the sample

[ DEBUG ] : [ main.cpp, 12 ] this is a debug sample with <1> args
[ DEBUG ] : [ main.cpp, 13 ] debug sample exit.