5d0ee3f675
Commit307d75bbe6(midx: implement `midx_locate_pack()`, 2023-12-14) introduced `midx_locate_pack()`, which was described at the time as a complement to the function `midx_contains_pack()` which allowed callers to determine where in the MIDX lexical order a pack appeared, as opposed to whether or not it was simply contained.307d75bbe6suggests that future patches would be added which would introduce callers for this new function, but none ever were, meaning the function has gone unused since its introduction. Clean this up by in effect reverting307d75bbe6, which removes the unused functions and inlines its definition back into `midx_contains_pack()`. (Looking back through the list archives when307d75bbe6was written, this was in preparation for this[1] patch from back when we had the concept of "disjoint" packs while developing multi-pack verbatim reuse. That concept was abandoned before the series was merged, but I never dropped what would become307d75bbe6from the series, leading to the state prior to this commit). [1]: https://lore.kernel.org/git/3019738b52ba8cd78ea696a3b800fa91e722eb66.1701198172.git.me@ttaylorr.com/ Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
#ifndef MIDX_H
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#define MIDX_H
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#include "string-list.h"
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struct object_id;
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struct pack_entry;
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struct repository;
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struct bitmapped_pack;
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#define MIDX_SIGNATURE 0x4d494458 /* "MIDX" */
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#define MIDX_VERSION 1
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#define MIDX_BYTE_FILE_VERSION 4
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#define MIDX_BYTE_HASH_VERSION 5
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#define MIDX_BYTE_NUM_CHUNKS 6
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#define MIDX_BYTE_NUM_PACKS 8
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#define MIDX_HEADER_SIZE 12
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#define MIDX_CHUNK_ALIGNMENT 4
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#define MIDX_CHUNKID_PACKNAMES 0x504e414d /* "PNAM" */
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#define MIDX_CHUNKID_BITMAPPEDPACKS 0x42544d50 /* "BTMP" */
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#define MIDX_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
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#define MIDX_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */
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#define MIDX_CHUNKID_OBJECTOFFSETS 0x4f4f4646 /* "OOFF" */
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#define MIDX_CHUNKID_LARGEOFFSETS 0x4c4f4646 /* "LOFF" */
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#define MIDX_CHUNKID_REVINDEX 0x52494458 /* "RIDX" */
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#define MIDX_CHUNK_OFFSET_WIDTH (2 * sizeof(uint32_t))
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#define MIDX_LARGE_OFFSET_NEEDED 0x80000000
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#define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX"
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#define GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP \
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"GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP"
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struct multi_pack_index {
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struct multi_pack_index *next;
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const unsigned char *data;
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size_t data_len;
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const uint32_t *revindex_data;
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const uint32_t *revindex_map;
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size_t revindex_len;
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uint32_t signature;
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unsigned char version;
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unsigned char hash_len;
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unsigned char num_chunks;
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uint32_t num_packs;
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uint32_t num_objects;
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int preferred_pack_idx;
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int local;
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const unsigned char *chunk_pack_names;
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size_t chunk_pack_names_len;
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const uint32_t *chunk_bitmapped_packs;
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size_t chunk_bitmapped_packs_len;
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const uint32_t *chunk_oid_fanout;
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const unsigned char *chunk_oid_lookup;
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const unsigned char *chunk_object_offsets;
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const unsigned char *chunk_large_offsets;
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size_t chunk_large_offsets_len;
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const unsigned char *chunk_revindex;
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size_t chunk_revindex_len;
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struct multi_pack_index *base_midx;
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uint32_t num_objects_in_base;
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uint32_t num_packs_in_base;
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const char **pack_names;
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struct packed_git **packs;
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char object_dir[FLEX_ARRAY];
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};
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#define MIDX_PROGRESS (1 << 0)
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#define MIDX_WRITE_REV_INDEX (1 << 1)
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#define MIDX_WRITE_BITMAP (1 << 2)
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#define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3)
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#define MIDX_WRITE_BITMAP_LOOKUP_TABLE (1 << 4)
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#define MIDX_EXT_REV "rev"
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#define MIDX_EXT_BITMAP "bitmap"
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const unsigned char *get_midx_checksum(struct multi_pack_index *m);
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void get_midx_filename(struct strbuf *out, const char *object_dir);
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void get_midx_filename_ext(struct strbuf *out, const char *object_dir,
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const unsigned char *hash, const char *ext);
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struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local);
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int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id);
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int nth_bitmapped_pack(struct repository *r, struct multi_pack_index *m,
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struct bitmapped_pack *bp, uint32_t pack_int_id);
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int bsearch_one_midx(const struct object_id *oid, struct multi_pack_index *m,
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uint32_t *result);
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int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m,
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uint32_t *result);
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off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos);
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uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos);
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struct object_id *nth_midxed_object_oid(struct object_id *oid,
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struct multi_pack_index *m,
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uint32_t n);
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int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m);
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int midx_contains_pack(struct multi_pack_index *m,
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const char *idx_or_pack_name);
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int midx_preferred_pack(struct multi_pack_index *m, uint32_t *pack_int_id);
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int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local);
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/*
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* Variant of write_midx_file which writes a MIDX containing only the packs
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* specified in packs_to_include.
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*/
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int write_midx_file(const char *object_dir,
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const char *preferred_pack_name,
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const char *refs_snapshot,
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unsigned flags);
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int write_midx_file_only(const char *object_dir,
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struct string_list *packs_to_include,
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const char *preferred_pack_name,
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const char *refs_snapshot,
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unsigned flags);
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void clear_midx_file(struct repository *r);
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int verify_midx_file(struct repository *r, const char *object_dir, unsigned flags);
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int expire_midx_packs(struct repository *r, const char *object_dir, unsigned flags);
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int midx_repack(struct repository *r, const char *object_dir, size_t batch_size, unsigned flags);
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void close_midx(struct multi_pack_index *m);
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#endif
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