- * Find the item, if any, with the given key and assign *x with its
- * address. Returns 1 on success and 0 on failure to find the keyed
- * item. Note that when the function returns 0, *x is unchanged.
+ * \brief Find next keyed item at or after the given index.
+ * \param hv is the hasvector concerned
+ * \param index is a pointer to the index to advance
+ * \param key is the query key
+ * \returns the next matching item, or 0 if none, with the index updated.