#define SPF_DEFAULT_DEBUG_HANDLER
void(* SPF_warning_handler)(const char *, int, const char *)
void(* SPF_debug_handler)(const char *, int, const char *)
#define SPF_DEFAULT_ERROR_HANDLER
#define SPF_DEFAULT_INFO_HANDLER
void(* SPF_info_handler)(const char *, int, const char *)
void(* SPF_error_handler)(const char *, int, const char *) __attribute__((noreturn))
#define SPF_DEFAULT_WARNING_HANDLER