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Add the git_odb_exists() object query function

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This function determines if the given object can be found
in the object database. At present, only the local object
database is searched.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This commit is contained in:
Ramsay Jones 2009-02-10 21:49:48 +00:00 committed by Shawn O. Pearce
parent e9f5e87781
commit 82324ac1a5
2 changed files with 71 additions and 0 deletions
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11
src/git/odb.h
View File

@ -152,6 +152,17 @@ GIT_EXTERN(int) git_obj__loose_object_type(git_otype type);
*/
GIT_EXTERN(int) git_obj_hash(git_oid *id, git_obj *obj);
/**
* Determine if the given object can be found in the object database.
*
* @param db database to be searched for the given object.
* @param id the object to search for.
* @return
* - true, if the object was found
* - false, otherwise
*/
GIT_EXTERN(int) git_odb_exists(git_odb *db, const git_oid *id);
/** @} */
GIT_END_DECL
#endif

60
src/odb.c
View File

@ -819,6 +819,66 @@ static git_packlist *packlist_get(git_odb *db)
return pl;
}
static int search_packs(git_pack **p, off_t *offset, git_odb *db, const git_oid *id)
{
git_packlist *pl = packlist_get(db);
size_t j;
if (!pl)
return GIT_ENOTFOUND;
for (j = 0; j < pl->n_packs; j++) {
git_pack *pack = pl->packs[j];
off_t pos;
int res;
if (pack_openidx(pack))
continue;
res = pack->idx_search(&pos, pack, id);
pack_decidx(pack);
if (!res) {
packlist_dec(db,pl);
if (p)
*p = pack;
if (offset)
*offset = pos;
return GIT_SUCCESS;
}
}
packlist_dec(db,pl);
return GIT_ENOTFOUND;
}
static int exists_packed(git_odb *db, const git_oid *id)
{
return !search_packs(NULL, NULL, db, id);
}
static int exists_loose(git_odb *db, const git_oid *id)
{
char file[GIT_PATH_MAX];
if (object_file_name(file, sizeof(file), db->objects_dir, id) < 0)
return 0;
if (gitfo_exists(file) < 0)
return 0;
return 1;
}
int git_odb_exists(git_odb *db, const git_oid *id)
{
/* TODO: extend to search alternate db's */
if (exists_packed(db, id))
return 1;
return exists_loose(db, id);
}
int git_odb_open(git_odb **out, const char *objects_dir)
{
git_odb *db = git__calloc(1, sizeof(*db));