- s1 = index_query(mappedfile, xi1, t);
- s2 = index_query(mappedfile, xi2, t);
+ if (xi2 - xi1 == 1) {
+ /*
+ * We are querying an individual file, so we should not
+ * depend on the index entries either side of the node,
+ * since they almost certainly don't both exist. Instead,
+ * just look up the file's size and atime in the main trie.
+ */
+ const struct trie_file *f = trie_getfile(mappedfile, xi1);
+ if (f->atime < t)
+ size = f->size;
+ else
+ size = 0;
+ } else {
+ unsigned long long s1, s2;
+ s1 = index_query(mappedfile, xi1, t);
+ s2 = index_query(mappedfile, xi2, t);
+ size = s2 - s1;
+ }