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-rw-r--r--object-store.h142
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+#ifndef OBJECT_STORE_H
+#define OBJECT_STORE_H
+
+#include "oidmap.h"
+
+struct alternate_object_database {
+ struct alternate_object_database *next;
+
+ /* see alt_scratch_buf() */
+ struct strbuf scratch;
+ size_t base_len;
+
+ /*
+ * Used to store the results of readdir(3) calls when searching
+ * for unique abbreviated hashes. This cache is never
+ * invalidated, thus it's racy and not necessarily accurate.
+ * That's fine for its purpose; don't use it for tasks requiring
+ * greater accuracy!
+ */
+ char loose_objects_subdir_seen[256];
+ struct oid_array loose_objects_cache;
+
+ /*
+ * Path to the alternative object store. If this is a relative path,
+ * it is relative to the current working directory.
+ */
+ char path[FLEX_ARRAY];
+};
+void prepare_alt_odb(struct repository *r);
+char *compute_alternate_path(const char *path, struct strbuf *err);
+typedef int alt_odb_fn(struct alternate_object_database *, void *);
+int foreach_alt_odb(alt_odb_fn, void*);
+
+/*
+ * Allocate a "struct alternate_object_database" but do _not_ actually
+ * add it to the list of alternates.
+ */
+struct alternate_object_database *alloc_alt_odb(const char *dir);
+
+/*
+ * Add the directory to the on-disk alternates file; the new entry will also
+ * take effect in the current process.
+ */
+void add_to_alternates_file(const char *dir);
+
+/*
+ * Add the directory to the in-memory list of alternates (along with any
+ * recursive alternates it points to), but do not modify the on-disk alternates
+ * file.
+ */
+void add_to_alternates_memory(const char *dir);
+
+/*
+ * Returns a scratch strbuf pre-filled with the alternate object directory,
+ * including a trailing slash, which can be used to access paths in the
+ * alternate. Always use this over direct access to alt->scratch, as it
+ * cleans up any previous use of the scratch buffer.
+ */
+struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
+
+struct packed_git {
+ struct packed_git *next;
+ struct list_head mru;
+ struct pack_window *windows;
+ off_t pack_size;
+ const void *index_data;
+ size_t index_size;
+ uint32_t num_objects;
+ uint32_t num_bad_objects;
+ unsigned char *bad_object_sha1;
+ int index_version;
+ time_t mtime;
+ int pack_fd;
+ int index; /* for builtin/pack-objects.c */
+ unsigned pack_local:1,
+ pack_keep:1,
+ pack_keep_in_core:1,
+ freshened:1,
+ do_not_close:1,
+ pack_promisor:1;
+ unsigned char sha1[20];
+ struct revindex_entry *revindex;
+ /* something like ".git/objects/pack/xxxxx.pack" */
+ char pack_name[FLEX_ARRAY]; /* more */
+};
+
+struct raw_object_store {
+ /*
+ * Path to the repository's object store.
+ * Cannot be NULL after initialization.
+ */
+ char *objectdir;
+
+ /* Path to extra alternate object database if not NULL */
+ char *alternate_db;
+
+ struct alternate_object_database *alt_odb_list;
+ struct alternate_object_database **alt_odb_tail;
+
+ /*
+ * Objects that should be substituted by other objects
+ * (see git-replace(1)).
+ */
+ struct oidmap *replace_map;
+
+ /*
+ * private data
+ *
+ * should only be accessed directly by packfile.c
+ */
+
+ struct packed_git *packed_git;
+ /* A most-recently-used ordered version of the packed_git list. */
+ struct list_head packed_git_mru;
+
+ /*
+ * A fast, rough count of the number of objects in the repository.
+ * These two fields are not meant for direct access. Use
+ * approximate_object_count() instead.
+ */
+ unsigned long approximate_object_count;
+ unsigned approximate_object_count_valid : 1;
+
+ /*
+ * Whether packed_git has already been populated with this repository's
+ * packs.
+ */
+ unsigned packed_git_initialized : 1;
+};
+
+struct raw_object_store *raw_object_store_new(void);
+void raw_object_store_clear(struct raw_object_store *o);
+
+/*
+ * Put in `buf` the name of the file in the local object database that
+ * would be used to store a loose object with the specified sha1.
+ */
+void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1);
+
+void *map_sha1_file(struct repository *r, const unsigned char *sha1, unsigned long *size);
+
+#endif /* OBJECT_STORE_H */