- char buf[2] = { ptr[0], 0 };
- qstring_append(str, buf);
+ if (ptr[0] <= 0x1F) {
+ char escape[7];
+ snprintf(escape, sizeof(escape), "\\u%04X", ptr[0]);
+ qstring_append(str, escape);
+ } else {
+ char buf[2] = { ptr[0], 0 };
+ qstring_append(str, buf);
+ }