Struct faiss::DirectMap

struct faiss::DirectMap

Direct map: a way to map back from ids to inverted lists

Public Types

enum Type

Values:

enumerator NoMap
enumerator Array
enumerator Hashtable
typedef Index::idx_t idx_t

Public Functions

DirectMap()
void set_type(Type new_type, const InvertedLists *invlists, size_t ntotal)

set type and initialize

idx_t get(idx_t id) const

get an entry

inline bool no() const

for quick checks

void check_can_add(const idx_t *ids)

throw if Array and ids is not NULL

update the direct_map

void add_single_id(idx_t id, idx_t list_no, size_t offset)

non thread-safe version

void clear()

remove all entries

size_t remove_ids(const IDSelector &sel, InvertedLists *invlists)

remove ids from the InvertedLists, possibly using the direct map

operations on inverted lists that require translation with a DirectMap

void update_codes(InvertedLists *invlists, int n, const idx_t *ids, const idx_t *list_nos, const uint8_t *codes)

update entries, using the direct map

Public Members

Type type
std::vector<idx_t> array

map for direct access to the elements. Map ids to LO-encoded entries.

std::unordered_map<idx_t, idx_t> hashtable