Andrew's git - gitweb.git/blob

   1#ifndef OBJECT_STORE_H
   2#define OBJECT_STORE_H
   3
   4struct alternate_object_database {
   5        struct alternate_object_database *next;
   6
   7        /* see alt_scratch_buf() */
   8        struct strbuf scratch;
   9        size_t base_len;
  10
  11        /*
  12         * Used to store the results of readdir(3) calls when searching
  13         * for unique abbreviated hashes.  This cache is never
  14         * invalidated, thus it's racy and not necessarily accurate.
  15         * That's fine for its purpose; don't use it for tasks requiring
  16         * greater accuracy!
  17         */
  18        char loose_objects_subdir_seen[256];
  19        struct oid_array loose_objects_cache;
  20
  21        char path[FLEX_ARRAY];
  22};
  23void prepare_alt_odb(void);
  24char *compute_alternate_path(const char *path, struct strbuf *err);
  25typedef int alt_odb_fn(struct alternate_object_database *, void *);
  26int foreach_alt_odb(alt_odb_fn, void*);
  27
  28/*
  29 * Allocate a "struct alternate_object_database" but do _not_ actually
  30 * add it to the list of alternates.
  31 */
  32struct alternate_object_database *alloc_alt_odb(const char *dir);
  33
  34/*
  35 * Add the directory to the on-disk alternates file; the new entry will also
  36 * take effect in the current process.
  37 */
  38void add_to_alternates_file(const char *dir);
  39
  40/*
  41 * Add the directory to the in-memory list of alternates (along with any
  42 * recursive alternates it points to), but do not modify the on-disk alternates
  43 * file.
  44 */
  45void add_to_alternates_memory(const char *dir);
  46
  47/*
  48 * Returns a scratch strbuf pre-filled with the alternate object directory,
  49 * including a trailing slash, which can be used to access paths in the
  50 * alternate. Always use this over direct access to alt->scratch, as it
  51 * cleans up any previous use of the scratch buffer.
  52 */
  53struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
  54
  55struct raw_object_store {
  56        /*
  57         * Path to the repository's object store.
  58         * Cannot be NULL after initialization.
  59         */
  60        char *objectdir;
  61
  62        /* Path to extra alternate object database if not NULL */
  63        char *alternate_db;
  64
  65        struct alternate_object_database *alt_odb_list;
  66        struct alternate_object_database **alt_odb_tail;
  67};
  68
  69struct raw_object_store *raw_object_store_new(void);
  70void raw_object_store_clear(struct raw_object_store *o);
  71
  72#endif /* OBJECT_STORE_H */