How to use `containsRange` in roaring64

[MochiXu]

How to use `containsRange` in roaring64

[SLieve]

Roaring64Map internally uses a std::map of uint32_t for the high 32 bits of values, to a 32-bit Roaring bitmap containing the low 32 bits of values with the associated high 32 bits. This means that using roaring_bitmap_contains_range will only determine whether a specific 32-bit Roaring bitmap contains a given 32-bit range.

To determine whether a 64-bit range is fully present in the Roaring64Map, we would need to loop over all different high 32 bits of the range, and check the corresponding 32-bit Roaring bitmaps for subranges. See a similar implementation here.