- * save memory. If the true distance was truncated,
- * this will give the distance to the rank of a suffix
- * that is lexicographically closer to the current
- * suffix than the desired suffix, but appears *later*
- * in the window and hence cannot be used as the basis
- * for a LZ77 match. */
+ * save memory; or, 0 if no such suffix exists. If the
+ * true distance was truncated, this will give the
+ * distance to the rank of a suffix that is
+ * lexicographically closer to the current suffix than
+ * the desired suffix, but appears *later* in the window
+ * and hence cannot be used as the basis for an LZ77
+ * match. */