This is a minimal Count-Min sketch implementation:

sketch_new()
sketch_free()
sketch_add()
sketch_count()

sketch_clone()
sketch_merge()

sketch_compress()
sketch_values()

And a minimal bloom-filter implementation:

bfilter_new()
bfilter_free()
bfilter_add()
bfilter_exists()

bfilter_clone()
bfilter_merge()

bfilter_compress()