Print the file name, line number and function name of a calling function – C Prog

I’d pass the data to the function through parameters (maybe get the help of a macro)

int info(const char *fname, int lineno, const char *fxname, ...) { /* ... */ }
int debug(const char *fname, int lineno, const char *fxname, ...) { /* ... */ }
int error(const char *fname, int lineno, const char *fxname, ...) { /* ... */ }

And to call them

info(__FILE__, __LINE__, __func__, ...);
debug(__FILE__, __LINE__, __func__, ...);
error(__FILE__, __LINE__, __func__, ...);

Note: __func__ is C99; gcc, in mode C89 has __FUNCTION__