+static void opt_blocks (ISAMC is, struct isc_merge_block *mb, int ptr, int last)
+{
+ int i, no_dirty = 0;
+ for (i = 0; i<ptr; i++)
+ if (mb[i].dirty)
+ no_dirty++;
+ if (no_dirty*4 < ptr*3)
+ return;
+ /* bubble-sort it */
+ for (i = 0; i<ptr; i++)
+ {
+ int tmp, j, j_min = -1;
+ for (j = i; j<ptr; j++)
+ {
+ if (j_min < 0 || mb[j_min].block > mb[j].block)
+ j_min = j;
+ }
+ assert (j_min >= 0);
+ tmp = mb[j_min].block;
+ mb[j_min].block = mb[i].block;
+ mb[i].block = tmp;
+ mb[i].dirty = 1;
+ }
+ if (!last)
+ mb[i].dirty = 1;
+}
+