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/*

* 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.

*/

#ifndef INCLUDE_git_graph_h__

#define INCLUDE_git_graph_h__

#include "common.h"

#include "types.h"

#include "oid.h"

/**

* @file git2/graph.h

* @brief Git graph traversal routines

* @defgroup git_revwalk Git graph traversal routines

* @ingroup Git

* @{

*/

GIT_BEGIN_DECL

/**

* Count the number of unique commits between two commit objects

*

* There is no need for branches containing the commits to have any

* upstream relationship, but it helps to think of one as a branch and

* the other as its upstream, the `ahead` and `behind` values will be

* what git would report for the branches.

*

* @param ahead number of unique from commits in `upstream`

* @param behind number of unique from commits in `local`

* @param repo the repository where the commits exist

* @param local the commit for local

* @param upstream the commit for upstream

*/

GIT_EXTERN(int) git_graph_ahead_behind(size_t *ahead, size_t *behind, git_repository *repo, const git_oid *local, const git_oid *upstream);

/** @} */

GIT_END_DECL

#endif