int snprintf (char *, size_t, const char *, ...) PRINTF_FORMAT (3, 4);
int vprintf (const char *, va_list) PRINTF_FORMAT (1, 0);
int snprintf (char *, size_t, const char *, ...) PRINTF_FORMAT (3, 4);
int vprintf (const char *, va_list) PRINTF_FORMAT (1, 0);