merge: expose multiple merge basescmn/oidarray

We always calculate multiple merge bases, but up to now we had only
exposed the "best" merge base.

Introduce git_oidarray which analogously to git_strarray lets us return
multiple ids.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/oidarray.c b/src/oidarray.c
new file mode 100644
index 000000000..1d51a2958
--- /dev/null
+++ b/src/oidarray.c
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "git2/oidarray.h"
+#include "oidarray.h"
+#include "array.h"
+
+void git_oidarray_free(git_oidarray *arr)
+{
+	git__free(arr->ids);
+}
+
+void git_oidarray__from_array(git_oidarray *arr, git_array_oid_t *array)
+{
+	arr->count = array->size;
+	arr->ids = array->ptr;
+}