1#ifndef OBJECT_STORE_H 2#define OBJECT_STORE_H 3 4#include "oidmap.h" 5 6struct alternate_object_database { 7 struct alternate_object_database *next; 8 9 /* see alt_scratch_buf() */ 10 struct strbuf scratch; 11 size_t base_len; 12 13 /* 14 * Used to store the results of readdir(3) calls when searching 15 * for unique abbreviated hashes. This cache is never 16 * invalidated, thus it's racy and not necessarily accurate. 17 * That's fine for its purpose; don't use it for tasks requiring 18 * greater accuracy! 19 */ 20 char loose_objects_subdir_seen[256]; 21 struct oid_array loose_objects_cache; 22 23 /* 24 * Path to the alternative object store. If this is a relative path, 25 * it is relative to the current working directory. 26 */ 27 char path[FLEX_ARRAY]; 28}; 29void prepare_alt_odb(struct repository *r); 30char *compute_alternate_path(const char *path, struct strbuf *err); 31typedef int alt_odb_fn(struct alternate_object_database *, void *); 32int foreach_alt_odb(alt_odb_fn, void*); 33 34/* 35 * Allocate a "struct alternate_object_database" but do _not_ actually 36 * add it to the list of alternates. 37 */ 38struct alternate_object_database *alloc_alt_odb(const char *dir); 39 40/* 41 * Add the directory to the on-disk alternates file; the new entry will also 42 * take effect in the current process. 43 */ 44void add_to_alternates_file(const char *dir); 45 46/* 47 * Add the directory to the in-memory list of alternates (along with any 48 * recursive alternates it points to), but do not modify the on-disk alternates 49 * file. 50 */ 51void add_to_alternates_memory(const char *dir); 52 53/* 54 * Returns a scratch strbuf pre-filled with the alternate object directory, 55 * including a trailing slash, which can be used to access paths in the 56 * alternate. Always use this over direct access to alt->scratch, as it 57 * cleans up any previous use of the scratch buffer. 58 */ 59struct strbuf *alt_scratch_buf(struct alternate_object_database *alt); 60 61struct packed_git { 62 struct packed_git *next; 63 struct list_head mru; 64 struct pack_window *windows; 65 off_t pack_size; 66 const void *index_data; 67 size_t index_size; 68 uint32_t num_objects; 69 uint32_t num_bad_objects; 70 unsigned char *bad_object_sha1; 71 int index_version; 72 time_t mtime; 73 int pack_fd; 74 int index; /* for builtin/pack-objects.c */ 75 unsigned pack_local:1, 76 pack_keep:1, 77 pack_keep_in_core:1, 78 freshened:1, 79 do_not_close:1, 80 pack_promisor:1; 81 unsigned char sha1[20]; 82 struct revindex_entry *revindex; 83 /* something like ".git/objects/pack/xxxxx.pack" */ 84 char pack_name[FLEX_ARRAY]; /* more */ 85}; 86 87struct multi_pack_index; 88 89struct raw_object_store { 90 /* 91 * Path to the repository's object store. 92 * Cannot be NULL after initialization. 93 */ 94 char *objectdir; 95 96 /* Path to extra alternate object database if not NULL */ 97 char *alternate_db; 98 99 struct alternate_object_database *alt_odb_list; 100 struct alternate_object_database **alt_odb_tail; 101 102 /* 103 * Objects that should be substituted by other objects 104 * (see git-replace(1)). 105 */ 106 struct oidmap *replace_map; 107 108 /* 109 * private data 110 * 111 * should only be accessed directly by packfile.c 112 */ 113 114 struct packed_git *packed_git; 115 /* A most-recently-used ordered version of the packed_git list. */ 116 struct list_head packed_git_mru; 117 118 /* 119 * A fast, rough count of the number of objects in the repository. 120 * These two fields are not meant for direct access. Use 121 * approximate_object_count() instead. 122 */ 123 unsigned long approximate_object_count; 124 unsigned approximate_object_count_valid : 1; 125 126 /* 127 * Whether packed_git has already been populated with this repository's 128 * packs. 129 */ 130 unsigned packed_git_initialized : 1; 131}; 132 133struct raw_object_store *raw_object_store_new(void); 134void raw_object_store_clear(struct raw_object_store *o); 135 136/* 137 * Put in `buf` the name of the file in the local object database that 138 * would be used to store a loose object with the specified sha1. 139 */ 140void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1); 141 142void *map_sha1_file(struct repository *r, const unsigned char *sha1, unsigned long *size); 143 144#endif /* OBJECT_STORE_H */