+ case 'S': {
+ const string_t *str = va_arg(ap, const string_t*);
+ for (size_t i = 0; i < str->size; ++i) {
+ fputc(str->begin[i], stderr);
+ }
+ break;
+ }
+
+ case 'u': {
+ const unsigned int val = va_arg(ap, unsigned int);
+ fprintf(stderr, "%u", val);
+ break;
+ }
+