Function path_join

ds4_server.c:8348–8350

    if (index >= ts->ids_cap) {
        int old = ts->ids_cap;
        int cap = old ? old : 4;
        while (cap <= index) cap *= 2;
        ts->ids = xrealloc(ts->ids, (size_t)cap * sizeof(ts->ids[0]));
        memset(ts->ids + old, 0, (size_t)(cap - old) * sizeof(ts->ids[0]));
        ts->ids_cap = cap;
    }