Debugging Macros for C

gistfile1.c

// Define debugging macros. Because actual code shouldn't be littered with
// debugging printfs and sanity check assertations.
#ifdef DEBUG
#define debug_assert(...) assert(__VA_ARGS__)
#define debug_printf(...) printf(__VA_ARGS__)
#else
#define debug_assert(...) ;
#define debug_printf(...) ;
#endif

Some notes: debug_assert is useful for some assert functions, including the one I'm using in my malloc code. It's probably not needed if you're using <assert.h>, since if NDEBUG is defined before assert.h is included, the assert function is replaced with a NOP.