Proxy.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Threading;
using LibGit2Sharp.Core.Handles;
using LibGit2Sharp.Handlers;

// ReSharper disable InconsistentNaming
namespace LibGit2Sharp.Core
{
    internal class Proxy
    {
        #region giterr_

        public static void giterr_set_str(GitErrorCategory error_class, Exception exception)
        {
            if (exception is OutOfMemoryException)
            {
                NativeMethods.giterr_set_oom();
            }
            else
            {
                NativeMethods.giterr_set_str(error_class, exception.Message);
            }
        }

        public static void giterr_set_str(GitErrorCategory error_class, String errorString)
        {
            NativeMethods.giterr_set_str(error_class, errorString);
        }

        #endregion

        #region git_blame_

        public static BlameSafeHandle git_blame_file(
            RepositorySafeHandle repo,
            FilePath path,
            GitBlameOptions options)
        {
            using (ThreadAffinity())
            {
                BlameSafeHandle handle;
                int res = NativeMethods.git_blame_file(out handle, repo, path, options);
                Ensure.ZeroResult(res);
                return handle;
            }
        }

        public static GitBlameHunk git_blame_get_hunk_byindex(BlameSafeHandle blame, uint idx)
        {
            return NativeMethods.git_blame_get_hunk_byindex(blame, idx).MarshalAs<GitBlameHunk>(false);
        }

        public static void git_blame_free(IntPtr blame)
        {
            NativeMethods.git_blame_free(blame);
        }

        #endregion

        #region git_blob_

        public static ObjectId git_blob_create_fromchunks(RepositorySafeHandle repo, FilePath hintpath, NativeMethods.source_callback fileCallback)
        {
            using (ThreadAffinity())
            {
                var oid = new GitOid();
                int res = NativeMethods.git_blob_create_fromchunks(ref oid, repo, hintpath, fileCallback, IntPtr.Zero);

                if (res == (int)GitErrorCode.User)
                {
                    throw new EndOfStreamException("The stream ended unexpectedly");
                }

                Ensure.ZeroResult(res);

                return oid;
            }
        }

        public static ObjectId git_blob_create_fromdisk(RepositorySafeHandle repo, FilePath path)
        {
            using (ThreadAffinity())
            {
                var oid = new GitOid();
                int res = NativeMethods.git_blob_create_fromdisk(ref oid, repo, path);
                Ensure.ZeroResult(res);

                return oid;
            }
        }

        public static ObjectId git_blob_create_fromfile(RepositorySafeHandle repo, FilePath path)
        {
            using (ThreadAffinity())
            {
                var oid = new GitOid();
                int res = NativeMethods.git_blob_create_fromworkdir(ref oid, repo, path);
                Ensure.ZeroResult(res);

                return oid;
            }
        }

        public static UnmanagedMemoryStream git_blob_filtered_content_stream(RepositorySafeHandle repo, ObjectId id, FilePath path, bool check_for_binary_data)
        {
            var buf = new GitBuf();
            var handle = new ObjectSafeWrapper(id, repo).ObjectPtr;

            return new RawContentStream(handle, h =>
            {
                Ensure.ZeroResult(NativeMethods.git_blob_filtered_content(buf, h, path, check_for_binary_data));
                return buf.ptr;
            },
            h => (long)buf.size,
            new[] { buf });
        }

        public static UnmanagedMemoryStream git_blob_rawcontent_stream(RepositorySafeHandle repo, ObjectId id, Int64 size)
        {
            var handle = new ObjectSafeWrapper(id, repo).ObjectPtr;
            return new RawContentStream(handle, NativeMethods.git_blob_rawcontent, h => size);
        }

        public static Int64 git_blob_rawsize(GitObjectSafeHandle obj)
        {
            return NativeMethods.git_blob_rawsize(obj);
        }

        public static bool git_blob_is_binary(GitObjectSafeHandle obj)
        {
            int res = NativeMethods.git_blob_is_binary(obj);
            Ensure.BooleanResult(res);

            return (res == 1);
        }

        #endregion

        #region git_branch_

        public static ReferenceSafeHandle git_branch_create(RepositorySafeHandle repo, string branch_name, ObjectId targetId, bool force,
            Signature signature, string logMessage)
        {
            using (ThreadAffinity())
            using (var osw = new ObjectSafeWrapper(targetId, repo))
            using (var sigHandle = signature.BuildHandle())
            {
                ReferenceSafeHandle reference;
                int res = NativeMethods.git_branch_create(out reference, repo, branch_name, osw.ObjectPtr, force, sigHandle, logMessage);
                Ensure.ZeroResult(res);
                return reference;
            }
        }

        public static void git_branch_delete(ReferenceSafeHandle reference)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_branch_delete(reference);
                Ensure.ZeroResult(res);
            }
        }

        public static IEnumerable<Branch> git_branch_iterator(Repository repo, GitBranchType branchType)
        {
            return git_iterator(
                (out BranchIteratorSafeHandle iter_out) =>
                NativeMethods.git_branch_iterator_new(out iter_out, repo.Handle, branchType),
                (BranchIteratorSafeHandle iter, out ReferenceSafeHandle ref_out, out int res) =>
                    {
                        GitBranchType type_out;
                        res = NativeMethods.git_branch_next(out ref_out, out type_out, iter);
                        return new { BranchType = type_out };
                    },
                (handle, payload) =>
                    {
                        var reference = Reference.BuildFromPtr<Reference>(handle, repo);
                        return new Branch(repo, reference, reference.CanonicalName);
                    }
                );
        }

        public static void git_branch_iterator_free(IntPtr iter)
        {
            NativeMethods.git_branch_iterator_free(iter);
        }

        public static ReferenceSafeHandle git_branch_move(ReferenceSafeHandle reference, string new_branch_name, bool force,
            Signature signature, string logMessage)
        {
            using (ThreadAffinity())
            using (var sigHandle = signature.BuildHandle())
            {
                ReferenceSafeHandle ref_out;
                int res = NativeMethods.git_branch_move(out ref_out, reference, new_branch_name, force, sigHandle, logMessage);
                Ensure.ZeroResult(res);
                return ref_out;
            }
        }

        public static string git_branch_remote_name(RepositorySafeHandle repo, string canonical_branch_name)
        {
            using (ThreadAffinity())
            using (var buf = new GitBuf())
            {
                int res = NativeMethods.git_branch_remote_name(buf, repo, canonical_branch_name);
                Ensure.Int32Result(res);

                return LaxUtf8Marshaler.FromNative(buf.ptr) ?? string.Empty;
            }
        }

        public static string git_branch_upstream_name(RepositorySafeHandle handle, string canonicalReferenceName)
        {
            using (ThreadAffinity())
            using (var buf = new GitBuf())
            {
                int res = NativeMethods.git_branch_upstream_name(buf, handle, canonicalReferenceName);
                if (res == (int) GitErrorCode.NotFound)
                {
                    return null;
                }

                Ensure.ZeroResult(res);
                return LaxUtf8Marshaler.FromNative(buf.ptr);
            }
        }

        #endregion

        #region git_buf_

        public static void git_buf_free(GitBuf buf)
        {
            NativeMethods.git_buf_free(buf);
        }

        #endregion

        #region git_checkout_

        public static void git_checkout_tree(
            RepositorySafeHandle repo,
            ObjectId treeId,
            ref GitCheckoutOpts opts)
        {
            using (ThreadAffinity())
            using (var osw = new ObjectSafeWrapper(treeId, repo))
            {
                int res = NativeMethods.git_checkout_tree(repo, osw.ObjectPtr, ref opts);
                Ensure.ZeroResult(res);
            }
        }

        public static void git_checkout_index(RepositorySafeHandle repo, GitObjectSafeHandle treeish, ref GitCheckoutOpts opts)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_checkout_index(repo, treeish, ref opts);
                Ensure.ZeroResult(res);
            }
        }

        #endregion

        #region git_cherry_pick_

        internal static void git_cherrypick(RepositorySafeHandle repo, ObjectId commit, GitCherryPickOptions options)
        {
            using (ThreadAffinity())
            using (var nativeCommit = git_object_lookup(repo, commit, GitObjectType.Commit))
            {
                int res = NativeMethods.git_cherrypick(repo, nativeCommit, options);
                Ensure.ZeroResult(res);
            }
        }
        #endregion

        #region git_clone_

        public static RepositorySafeHandle git_clone(
            string url,
            string workdir,
            ref GitCloneOptions opts)
        {
            using (ThreadAffinity())
            {
                RepositorySafeHandle repo;
                int res = NativeMethods.git_clone(out repo, url, workdir, ref opts);
                Ensure.ZeroResult(res);
                return repo;
            }
        }

        #endregion

        #region git_commit_

        public static Signature git_commit_author(GitObjectSafeHandle obj)
        {
            return new Signature(NativeMethods.git_commit_author(obj));
        }

        public static Signature git_commit_committer(GitObjectSafeHandle obj)
        {
            return new Signature(NativeMethods.git_commit_committer(obj));
        }

        public static ObjectId git_commit_create(
            RepositorySafeHandle repo,
            string referenceName,
            Signature author,
            Signature committer,
            string message,
            Tree tree,
            GitOid[] parentIds)
        {
            using (ThreadAffinity())
            using (SignatureSafeHandle authorHandle = author.BuildHandle())
            using (SignatureSafeHandle committerHandle = committer.BuildHandle())
            using (var parentPtrs = new ArrayMarshaler<GitOid>(parentIds))
            {
                GitOid commitOid;

                var treeOid = tree.Id.Oid;

                int res = NativeMethods.git_commit_create_from_ids(
                    out commitOid, repo, referenceName, authorHandle,
                    committerHandle, null, message,
                    ref treeOid, (UIntPtr)parentPtrs.Count, parentPtrs.ToArray());

                Ensure.ZeroResult(res);

                return commitOid;
            }
        }

        public static string git_commit_message(GitObjectSafeHandle obj)
        {
            return NativeMethods.git_commit_message(obj);
        }

        public static string git_commit_summary(GitObjectSafeHandle obj)
        {
            return NativeMethods.git_commit_summary(obj);
        }

        public static string git_commit_message_encoding(GitObjectSafeHandle obj)
        {
            return NativeMethods.git_commit_message_encoding(obj);
        }

        public static ObjectId git_commit_parent_id(GitObjectSafeHandle obj, uint i)
        {
            return NativeMethods.git_commit_parent_id(obj, i).MarshalAsObjectId();
        }

        public static int git_commit_parentcount(RepositorySafeHandle repo, ObjectId id)
        {
            using (var obj = new ObjectSafeWrapper(id, repo))
            {
                return git_commit_parentcount(obj);
            }
        }

        public static int git_commit_parentcount(ObjectSafeWrapper obj)
        {
            return (int)NativeMethods.git_commit_parentcount(obj.ObjectPtr);
        }

        public static ObjectId git_commit_tree_id(GitObjectSafeHandle obj)
        {
            return NativeMethods.git_commit_tree_id(obj).MarshalAsObjectId();
        }

        #endregion

        #region git_config_

        public static void git_config_add_file_ondisk(ConfigurationSafeHandle config, FilePath path, ConfigurationLevel level)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_config_add_file_ondisk(config, path, (uint)level, true);
                Ensure.ZeroResult(res);
            }
        }

        public static bool git_config_delete(ConfigurationSafeHandle config, string name)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_config_delete_entry(config, name);

                if (res == (int)GitErrorCode.NotFound)
                {
                    return false;
                }

                Ensure.ZeroResult(res);
                return true;
            }
        }

        public static FilePath git_config_find_global()
        {
            return ConvertPath(NativeMethods.git_config_find_global);
        }

        public static FilePath git_config_find_system()
        {
            return ConvertPath(NativeMethods.git_config_find_system);
        }

        public static FilePath git_config_find_xdg()
        {
            return ConvertPath(NativeMethods.git_config_find_xdg);
        }

        public static void git_config_free(IntPtr config)
        {
            NativeMethods.git_config_free(config);
        }

        public static ConfigurationEntry<T> git_config_get_entry<T>(ConfigurationSafeHandle config, string key)
        {
            GitConfigEntryHandle handle;

            if (!configurationParser.ContainsKey(typeof(T)))
            {
                throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Generic Argument of type '{0}' is not supported.", typeof(T).FullName));
            }

            using (ThreadAffinity())
            {
                var res = NativeMethods.git_config_get_entry(out handle, config, key);
                if (res == (int)GitErrorCode.NotFound)
                {
                    return null;
                }

                Ensure.ZeroResult(res);
            }

            GitConfigEntry entry = handle.MarshalAsGitConfigEntry();

            return new ConfigurationEntry<T>(LaxUtf8Marshaler.FromNative(entry.namePtr),
                (T)configurationParser[typeof(T)](LaxUtf8Marshaler.FromNative(entry.valuePtr)),
                (ConfigurationLevel)entry.level);
        }

        public static ConfigurationSafeHandle git_config_new()
        {
            using (ThreadAffinity())
            {
                ConfigurationSafeHandle handle;
                int res = NativeMethods.git_config_new(out handle);
                Ensure.ZeroResult(res);

                return handle;
            }
        }

        public static ConfigurationSafeHandle git_config_open_level(ConfigurationSafeHandle parent, ConfigurationLevel level)
        {
            using (ThreadAffinity())
            {
                ConfigurationSafeHandle handle;
                int res = NativeMethods.git_config_open_level(out handle, parent, (uint)level);

                if (res == (int)GitErrorCode.NotFound)
                {
                    return null;
                }

                Ensure.ZeroResult(res);

                return handle;
            }
        }

        public static bool git_config_parse_bool(string value)
        {
            using (ThreadAffinity())
            {
                bool outVal;
                var res = NativeMethods.git_config_parse_bool(out outVal, value);

                Ensure.ZeroResult(res);
                return outVal;
            }
        }

        public static int git_config_parse_int32(string value)
        {
            using (ThreadAffinity())
            {
                int outVal;
                var res = NativeMethods.git_config_parse_int32(out outVal, value);

                Ensure.ZeroResult(res);
                return outVal;
            }
        }

        public static long git_config_parse_int64(string value)
        {
            using (ThreadAffinity())
            {
                long outVal;
                var res = NativeMethods.git_config_parse_int64(out outVal, value);

                Ensure.ZeroResult(res);
                return outVal;
            }
        }

        public static void git_config_set_bool(ConfigurationSafeHandle config, string name, bool value)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_config_set_bool(config, name, value);
                Ensure.ZeroResult(res);
            }
        }

        public static void git_config_set_int32(ConfigurationSafeHandle config, string name, int value)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_config_set_int32(config, name, value);
                Ensure.ZeroResult(res);
            }
        }

        public static void git_config_set_int64(ConfigurationSafeHandle config, string name, long value)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_config_set_int64(config, name, value);
                Ensure.ZeroResult(res);
            }
        }

        public static void git_config_set_string(ConfigurationSafeHandle config, string name, string value)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_config_set_string(config, name, value);
                Ensure.ZeroResult(res);
            }
        }

        public static ICollection<TResult> git_config_foreach<TResult>(
            ConfigurationSafeHandle config,
            Func<IntPtr, TResult> resultSelector)
        {
            return git_foreach(resultSelector, c => NativeMethods.git_config_foreach(config, (e, p) => c(e, p), IntPtr.Zero));
        }

        public static IEnumerable<ConfigurationEntry<string>> git_config_iterator_glob(
            ConfigurationSafeHandle config,
            string regexp,
            Func<IntPtr, ConfigurationEntry<string>> resultSelector)
        {
            return git_iterator(
                (out ConfigurationIteratorSafeHandle iter) =>
                NativeMethods.git_config_iterator_glob_new(out iter, config, regexp),
                (ConfigurationIteratorSafeHandle iter, out SafeHandleBase handle, out int res) =>
                    {
                        handle = null;

                        IntPtr entry;
                        res = NativeMethods.git_config_next(out entry, iter);
                        return new { EntryPtr = entry };
                    },
                (handle, payload) => resultSelector(payload.EntryPtr)
                );
        }

        public static void git_config_iterator_free(IntPtr iter)
        {
            NativeMethods.git_config_iterator_free(iter);
        }

        public static ConfigurationSafeHandle git_config_snapshot(ConfigurationSafeHandle config)
        {
            using (ThreadAffinity())
            {
                ConfigurationSafeHandle handle;
                int res = NativeMethods.git_config_snapshot(out handle, config);
                Ensure.ZeroResult(res);

                return handle;
            }
        }

        #endregion

        #region git_diff_

        public static void git_diff_blobs(
            RepositorySafeHandle repo,
            ObjectId oldBlob,
            ObjectId newBlob,
            GitDiffOptions options,
            NativeMethods.git_diff_file_cb fileCallback,
            NativeMethods.git_diff_hunk_cb hunkCallback,
            NativeMethods.git_diff_line_cb lineCallback)
        {
            using (ThreadAffinity())
            using (var osw1 = new ObjectSafeWrapper(oldBlob, repo, true))
            using (var osw2 = new ObjectSafeWrapper(newBlob, repo, true))
            {
                int res = NativeMethods.git_diff_blobs(
                    osw1.ObjectPtr, null, osw2.ObjectPtr, null,
                    options, fileCallback, hunkCallback, lineCallback, IntPtr.Zero);

                Ensure.ZeroResult(res);
            }
        }

        public static void git_diff_foreach(
            DiffSafeHandle diff,
            NativeMethods.git_diff_file_cb fileCallback,
            NativeMethods.git_diff_hunk_cb hunkCallback,
            NativeMethods.git_diff_line_cb lineCallback)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_diff_foreach(diff, fileCallback, hunkCallback, lineCallback, IntPtr.Zero);
                Ensure.ZeroResult(res);
            }
        }

        public static DiffSafeHandle git_diff_tree_to_index(
            RepositorySafeHandle repo,
            IndexSafeHandle index,
            ObjectId oldTree,
            GitDiffOptions options)
        {
            using (ThreadAffinity())
            using (var osw = new ObjectSafeWrapper(oldTree, repo, true))
            {
                DiffSafeHandle diff;
                int res = NativeMethods.git_diff_tree_to_index(out diff, repo, osw.ObjectPtr, index, options);
                Ensure.ZeroResult(res);

                return diff;
            }
        }

        public static void git_diff_free(IntPtr diff)
        {
            NativeMethods.git_diff_free(diff);
        }

        public static void git_diff_merge(DiffSafeHandle onto, DiffSafeHandle from)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_diff_merge(onto, from);
                Ensure.ZeroResult(res);
            }
        }

        public static DiffSafeHandle git_diff_tree_to_tree(
            RepositorySafeHandle repo,
            ObjectId oldTree,
            ObjectId newTree,
            GitDiffOptions options)
        {
            using (ThreadAffinity())
            using (var osw1 = new ObjectSafeWrapper(oldTree, repo, true))
            using (var osw2 = new ObjectSafeWrapper(newTree, repo, true))
            {
                DiffSafeHandle diff;
                int res = NativeMethods.git_diff_tree_to_tree(out diff, repo, osw1.ObjectPtr, osw2.ObjectPtr, options);
                Ensure.ZeroResult(res);

                return diff;
            }
        }

        public static DiffSafeHandle git_diff_index_to_workdir(
            RepositorySafeHandle repo,
            IndexSafeHandle index,
            GitDiffOptions options)
        {
            using (ThreadAffinity())
            {
                DiffSafeHandle diff;
                int res = NativeMethods.git_diff_index_to_workdir(out diff, repo, index, options);
                Ensure.ZeroResult(res);

                return diff;
            }
        }

        public static DiffSafeHandle git_diff_tree_to_workdir(
           RepositorySafeHandle repo,
           ObjectId oldTree,
           GitDiffOptions options)
        {
            using (ThreadAffinity())
            using (var osw = new ObjectSafeWrapper(oldTree, repo, true))
            {
                DiffSafeHandle diff;
                int res = NativeMethods.git_diff_tree_to_workdir(out diff, repo, osw.ObjectPtr, options);
                Ensure.ZeroResult(res);

                return diff;
            }
        }

        public static void git_diff_find_similar(DiffSafeHandle diff, GitDiffFindOptions options)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_diff_find_similar(diff, options);
                Ensure.ZeroResult(res);
            }
        }

        public static int git_diff_num_deltas(DiffSafeHandle diff)
        {
            return (int)NativeMethods.git_diff_num_deltas(diff);
        }

        public static GitDiffDelta git_diff_get_delta(DiffSafeHandle diff, int idx)
        {
            return NativeMethods.git_diff_get_delta(diff, (UIntPtr) idx).MarshalAs<GitDiffDelta>(false);
        }

        #endregion

        #region git_graph_

        public static Tuple<int?, int?> git_graph_ahead_behind(RepositorySafeHandle repo, Commit first, Commit second)
        {
            if (first == null || second == null)
            {
                return new Tuple<int?, int?>(null, null);
            }

            GitOid oid1 = first.Id.Oid;
            GitOid oid2 = second.Id.Oid;

            using (ThreadAffinity())
            {
                UIntPtr ahead;
                UIntPtr behind;

                int res = NativeMethods.git_graph_ahead_behind(out ahead, out behind, repo, ref oid1, ref oid2);

                Ensure.ZeroResult(res);

                return new Tuple<int?, int?>((int)ahead, (int)behind);
            }
        }

        public static bool git_graph_descendant_of(RepositorySafeHandle repo, ObjectId commitId, ObjectId ancestorId)
        {
            GitOid oid1 = commitId.Oid;
            GitOid oid2 = ancestorId.Oid;

            using (ThreadAffinity())
            {
                int res = NativeMethods.git_graph_descendant_of(repo, ref oid1, ref oid2);

                Ensure.BooleanResult(res);

                return (res == 1);
            }
        }

        #endregion

        #region git_ignore_

        public static void git_ignore_add_rule(RepositorySafeHandle repo, string rules)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_ignore_add_rule(repo, rules);
                Ensure.ZeroResult(res);
            }
        }

        public static void git_ignore_clear_internal_rules(RepositorySafeHandle repo)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_ignore_clear_internal_rules(repo);
                Ensure.ZeroResult(res);
            }
        }

        public static bool git_ignore_path_is_ignored(RepositorySafeHandle repo, string path)
        {
            using (ThreadAffinity())
            {
                int ignored;
                int res = NativeMethods.git_ignore_path_is_ignored(out ignored, repo, path);
                Ensure.ZeroResult(res);

                return (ignored != 0);
            }
        }

        #endregion

        #region git_index_

        public static void git_index_add(IndexSafeHandle index, GitIndexEntry entry)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_index_add(index, entry);
                Ensure.ZeroResult(res);
            }
        }

        public static void git_index_add_bypath(IndexSafeHandle index, FilePath path)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_index_add_bypath(index, path);
                Ensure.ZeroResult(res);
            }
        }

        public static Conflict git_index_conflict_get(
            IndexSafeHandle index,
            Repository repo,
            FilePath path)
        {
            IndexEntrySafeHandle ancestor, ours, theirs;

            int res = NativeMethods.git_index_conflict_get(
                out ancestor, out ours, out theirs, index, path);

            if (res == (int)GitErrorCode.NotFound)
            {
                return null;
            }

            Ensure.ZeroResult(res);

            return new Conflict(
                IndexEntry.BuildFromPtr(ancestor),
                IndexEntry.BuildFromPtr(ours),
                IndexEntry.BuildFromPtr(theirs));
        }

        public static int git_index_entrycount(IndexSafeHandle index)
        {
            UIntPtr count = NativeMethods.git_index_entrycount(index);
            if ((long)count > int.MaxValue)
            {
                throw new LibGit2SharpException("Index entry count exceeds size of int");
            }
            return (int)count;
        }

        public static StageLevel git_index_entry_stage(IndexEntrySafeHandle index)
        {
            return (StageLevel)NativeMethods.git_index_entry_stage(index);
        }

        public static void git_index_free(IntPtr index)
        {
            NativeMethods.git_index_free(index);
        }

        public static IndexEntrySafeHandle git_index_get_byindex(IndexSafeHandle index, UIntPtr n)
        {
            return NativeMethods.git_index_get_byindex(index, n);
        }

        public static IndexEntrySafeHandle git_index_get_bypath(IndexSafeHandle index, FilePath path, int stage)
        {
            IndexEntrySafeHandle handle = NativeMethods.git_index_get_bypath(index, path, stage);

            return handle.IsZero ? null : handle;
        }

        public static bool git_index_has_conflicts(IndexSafeHandle index)
        {
            int res = NativeMethods.git_index_has_conflicts(index);
            Ensure.BooleanResult(res);

            return res != 0;
        }

        public static int git_index_name_entrycount(IndexSafeHandle index)
        {
            uint count = NativeMethods.git_index_name_entrycount(index);
            if ((long)count > int.MaxValue)
            {
                throw new LibGit2SharpException("Index name entry count exceeds size of int");
            }
            return (int)count;
        }

        public static IndexNameEntrySafeHandle git_index_name_get_byindex(IndexSafeHandle index, UIntPtr n)
        {
            return NativeMethods.git_index_name_get_byindex(index, n);
        }

        public static IndexSafeHandle git_index_open(FilePath indexpath)
        {
            using (ThreadAffinity())
            {
                IndexSafeHandle handle;
                int res = NativeMethods.git_index_open(out handle, indexpath);
                Ensure.ZeroResult(res);

                return handle;
            }
        }

        public static void git_index_read(IndexSafeHandle index)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_index_read(index, false);
                Ensure.ZeroResult(res);
            }
        }

        public static void git_index_remove_bypath(IndexSafeHandle index, FilePath path)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_index_remove_bypath(index, path);
                Ensure.ZeroResult(res);
            }
        }

        public static int git_index_reuc_entrycount(IndexSafeHandle index)
        {
            uint count = NativeMethods.git_index_reuc_entrycount(index);
            if ((long)count > int.MaxValue)
            {
                throw new LibGit2SharpException("Index REUC entry count exceeds size of int");
            }
            return (int)count;
        }

        public static IndexReucEntrySafeHandle git_index_reuc_get_byindex(IndexSafeHandle index, UIntPtr n)
        {
            return NativeMethods.git_index_reuc_get_byindex(index, n);
        }

        public static IndexReucEntrySafeHandle git_index_reuc_get_bypath(IndexSafeHandle index, string path)
        {
            return NativeMethods.git_index_reuc_get_bypath(index, path);
        }

        public static void git_index_write(IndexSafeHandle index)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_index_write(index);
                Ensure.ZeroResult(res);
            }
        }

        public static ObjectId git_tree_create_fromindex(Index index)
        {
            using (ThreadAffinity())
            {
                GitOid treeOid;
                int res = NativeMethods.git_index_write_tree(out treeOid, index.Handle);
                Ensure.ZeroResult(res);

                return treeOid;
            }
        }

        public static void git_index_read_fromtree(Index index, GitObjectSafeHandle tree)
        {
            using (ThreadAffinity())
            {
                int res = NativeMethods.git_index_read_tree(index.Handle, tree);
                Ensure.ZeroResult(res);
            }
        }

        #endregion

        #region git_merge_

        public static ObjectId git_merge_base_many(RepositorySafeHandle repo, GitOid[] commitIds)