+static void delete_dive_renumber(struct dive **dives, int i, int nr)
+{
+ struct dive *dive = dives[i];
+ int number = dive->number, j;
+
+ if (!number)
+ return;
+
+ /*
+ * Check that all numbered dives after the deleted
+ * ones are consecutive, return without renumbering
+ * if that is not the case.
+ */
+ for (j = i+1; j < nr; j++) {
+ struct dive *next = dives[j];
+ if (!next->number)
+ break;
+ number++;
+ if (next->number != number)
+ return;
+ }
+
+ /*
+ * Ok, we hit the end of the dives or a unnumbered
+ * dive - renumber.
+ */
+ for (j = i+1 ; j < nr; j++) {
+ struct dive *next = dives[j];
+ if (!next->number)
+ break;
+ next->number--;
+ }
+}
+