#include <stdio.h>


#ifdef DEBUG

#define LOG(l, f, ...)  fprintf(stderr, l ": " DEBUG ": " f "\n" __VA_OPT__(,) __VA_ARGS__)

#else // !DEBUG

#define LOG(...)

#endif // DEBUG


#define LOGE(f, ...) LOG("E", f, __VA_ARGS__)
#define LOGW(f, ...) LOG("W", f, __VA_ARGS__)
#define LOGI(f, ...) LOG("I", f, __VA_ARGS__)
#define LOGD(f, ...) LOG("D", f, __VA_ARGS__)
#define LOGV(f, ...) LOG("V", f, __VA_ARGS__)