Struct MidxReuseTables 

pub struct MidxReuseTables {
    pub oids: Vec<ObjectId>,
    pub pack_and_offset: Vec<(u32, u64)>,
    pub rid_order: Vec<u32>,
    pub oid_idx_to_rank: Vec<u32>,
}

OID rows from the active multi-pack-index, plus reverse-index order for pack-reuse bitmap bits.

Git assigns each object a global bitmap bit equal to its position in the MIDX reverse index (RIDX chunk) traversal order — not its position in the pack .idx file. Helpers on this struct map ObjectId → global bit the same way as midx-write.c (midx_pack_order).

Fields

oids: Vec<ObjectId>

OIDs in MIDX lexicographic order (same order as the OID lookup chunk).

pack_and_offset: Vec<(u32, u64)>

(pack_int_id, in-pack offset) parallel to oids.

rid_order: Vec<u32>

rid_order[rank] is the OID-table index of the object at global bitmap rank rank.

oid_idx_to_rank: Vec<u32>

Inverse map: global bitmap rank for each OID-table index.

Implementations

impl MidxReuseTables

pub fn global_bitmap_bit(&self, oid: &ObjectId) -> Option<u32>

Global pseudo-bitmap index for oid, or None if the object is not in this MIDX.

pub fn canonical_pack(&self, oid: &ObjectId) -> Option<u32>

MIDX-canonical pack id for oid (the single copy the MIDX selected after deduplication), or None if the object is not in this MIDX. Used to reject cross-pack delta reuse: a delta is only reusable verbatim when its base resolves to the same pack the delta lives in, mirroring Git’s midx_pair_to_pack_pos check in try_partial_reuse.

Trait Implementations

impl Clone for MidxReuseTables

fn clone(&self) -> MidxReuseTables

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MidxReuseTables

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.