/// <summary>
/// Read the metadata describing a git object. If the actual object
/// contents are not needed this may be more performant than reading
/// the entire object, depending on the object database backend.
/// </summary>
/// <param name="id">The object ID to lookup</param>
/// <exception cref="Dogged.NotFoundException">Thrown when the object is not found in the database</exception>
/// <returns>An OdbObjectHeader on success</returns>
public unsafe (long size, ObjectType type) ReadHeader(ObjectId id)
{
UIntPtr size = UIntPtr.Zero;
git_object_t type = git_object_t.GIT_OBJECT_INVALID;
Ensure.ArgumentNotNull(id, "id");
git_oid oid = id.ToNative();
Ensure.NativeSuccess(() => libgit2.git_odb_read_header(out size, out type, nativeOdb, ref oid), this);
Ensure.EnumDefined(typeof(ObjectType), (int)type, "object type");
return(Ensure.CastToLong(size, "size"), (ObjectType)type);
}
private unsafe ObjectDatabaseObject(git_odb_object *nativeObject)
{
Ensure.NativePointerNotNull(nativeObject);
this.nativeObject = nativeObject;
id = new LazyNative <ObjectId>(() => {
git_oid *oid = libgit2.git_odb_object_id(nativeObject);
Ensure.NativePointerNotNull(oid);
return(ObjectId.FromNative(*oid));
}, this);
type = new LazyNative <ObjectType>(() => {
git_object_t type = libgit2.git_odb_object_type(nativeObject);
Ensure.EnumDefined(typeof(ObjectType), (int)type, "object type");
return((ObjectType)type);
}, this);
size = new LazyNative <long>(() => {
UIntPtr size = libgit2.git_odb_object_size(nativeObject);
return(Ensure.CastToLong(size, "size"));
}, this);
}
public static extern unsafe int git_odb_read_header(out UIntPtr len_out, out git_object_t type, git_odb *odb, ref git_oid id);
public static extern unsafe int git_odb_write(ref git_oid id, git_odb *odb, byte *data, UIntPtr len, git_object_t type);
public static extern unsafe int git_object_lookup(out git_object *obj, git_repository *repo, ref git_oid id, git_object_t type);
