From: Taylor Blau Date: Tue, 6 Aug 2024 15:37:27 +0000 (-0400) Subject: midx: teach `nth_bitmapped_pack()` about incremental MIDXs X-Git-Tag: v2.47.0-rc0~115^2~13 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=60750e1eb967c8622e7140037ec018a87577132b;p=thirdparty%2Fgit.git midx: teach `nth_bitmapped_pack()` about incremental MIDXs In a similar fashion as in previous commits, teach the function `nth_bitmapped_pack()` about incremental MIDXs by translating the given `pack_int_id` from the concatenated lexical order to a MIDX-local lexical position. When accessing the containing MIDX's array of packs, use the local pack ID. Likewise, when reading the 'BTMP' chunk, use the MIDX-local offset when accessing the data within that chunk. (Note that the both the call to prepare_midx_pack() and the assignment of bp->pack_int_id both care about the global pack_int_id, so avoid shadowing the given 'pack_int_id' parameter). Signed-off-by: Taylor Blau Signed-off-by: Junio C Hamano --- diff --git a/midx.c b/midx.c index 64a051cca1..25350152f1 100644 --- a/midx.c +++ b/midx.c @@ -311,17 +311,19 @@ int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, int nth_bitmapped_pack(struct repository *r, struct multi_pack_index *m, struct bitmapped_pack *bp, uint32_t pack_int_id) { + uint32_t local_pack_int_id = midx_for_pack(&m, pack_int_id); + if (!m->chunk_bitmapped_packs) return error(_("MIDX does not contain the BTMP chunk")); if (prepare_midx_pack(r, m, pack_int_id)) return error(_("could not load bitmapped pack %"PRIu32), pack_int_id); - bp->p = m->packs[pack_int_id]; + bp->p = m->packs[local_pack_int_id]; bp->bitmap_pos = get_be32((char *)m->chunk_bitmapped_packs + - MIDX_CHUNK_BITMAPPED_PACKS_WIDTH * pack_int_id); + MIDX_CHUNK_BITMAPPED_PACKS_WIDTH * local_pack_int_id); bp->bitmap_nr = get_be32((char *)m->chunk_bitmapped_packs + - MIDX_CHUNK_BITMAPPED_PACKS_WIDTH * pack_int_id + + MIDX_CHUNK_BITMAPPED_PACKS_WIDTH * local_pack_int_id + sizeof(uint32_t)); bp->pack_int_id = pack_int_id;