1#ifndef OBJECT_STORE_H 2#define OBJECT_STORE_H 3 4#include"oidmap.h" 5 6struct alternate_object_database { 7struct alternate_object_database *next; 8 9/* see alt_scratch_buf() */ 10struct strbuf scratch; 11size_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 */ 20char loose_objects_subdir_seen[256]; 21struct 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 */ 27char path[FLEX_ARRAY]; 28}; 29voidprepare_alt_odb(struct repository *r); 30char*compute_alternate_path(const char*path,struct strbuf *err); 31typedefintalt_odb_fn(struct alternate_object_database *,void*); 32intforeach_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 */ 44voidadd_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 */ 51voidadd_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 { 62struct packed_git *next; 63struct list_head mru; 64struct pack_window *windows; 65 off_t pack_size; 66const void*index_data; 67size_t index_size; 68uint32_t num_objects; 69uint32_t num_bad_objects; 70unsigned char*bad_object_sha1; 71int index_version; 72time_t mtime; 73int pack_fd; 74unsigned pack_local:1, 75 pack_keep:1, 76 pack_keep_in_core:1, 77 freshened:1, 78 do_not_close:1, 79 pack_promisor:1; 80unsigned char sha1[20]; 81struct revindex_entry *revindex; 82/* something like ".git/objects/pack/xxxxx.pack" */ 83char pack_name[FLEX_ARRAY];/* more */ 84}; 85 86struct raw_object_store { 87/* 88 * Path to the repository's object store. 89 * Cannot be NULL after initialization. 90 */ 91char*objectdir; 92 93/* Path to extra alternate object database if not NULL */ 94char*alternate_db; 95 96struct alternate_object_database *alt_odb_list; 97struct alternate_object_database **alt_odb_tail; 98 99/* 100 * Objects that should be substituted by other objects 101 * (see git-replace(1)). 102 */ 103struct oidmap *replace_map; 104 105/* 106 * private data 107 * 108 * should only be accessed directly by packfile.c 109 */ 110 111struct packed_git *packed_git; 112/* A most-recently-used ordered version of the packed_git list. */ 113struct list_head packed_git_mru; 114 115/* 116 * A fast, rough count of the number of objects in the repository. 117 * These two fields are not meant for direct access. Use 118 * approximate_object_count() instead. 119 */ 120unsigned long approximate_object_count; 121unsigned approximate_object_count_valid :1; 122 123/* 124 * Whether packed_git has already been populated with this repository's 125 * packs. 126 */ 127unsigned packed_git_initialized :1; 128}; 129 130struct raw_object_store *raw_object_store_new(void); 131voidraw_object_store_clear(struct raw_object_store *o); 132 133/* 134 * Put in `buf` the name of the file in the local object database that 135 * would be used to store a loose object with the specified sha1. 136 */ 137voidsha1_file_name(struct repository *r,struct strbuf *buf,const unsigned char*sha1); 138 139void*map_sha1_file(struct repository *r,const unsigned char*sha1,unsigned long*size); 140 141#endif/* OBJECT_STORE_H */