thodg/libgit2

diff --git a/src/checkout.c b/src/checkout.c
index a251c08..0b38522 100644
--- a/src/checkout.c
+++ b/src/checkout.c
@@ -279,17 +279,17 @@ static int checkout_action_wd_only(
 	if (data->index != NULL) {
 		size_t pos;
 
-		error = git_index__find(
+		error = git_index__find_pos(
 			&pos, data->index, wd->path, 0, GIT_INDEX_STAGE_ANY);
 
 		if (wd->mode != GIT_FILEMODE_TREE) {
-			if (!error) { /* found by git_index__find call */
+			if (!error) { /* found by git_index__find_pos call */
 				notify = GIT_CHECKOUT_NOTIFY_DIRTY;
 				remove = ((data->strategy & GIT_CHECKOUT_FORCE) != 0);
 			} else if (error != GIT_ENOTFOUND)
 				return error;
 			else
-				error = 0; /* git_index__find does not set error msg */
+				error = 0; /* git_index__find_pos does not set error msg */
 		} else {
 			/* for tree entries, we have to see if there are any index
 			 * entries that are contained inside that tree
diff --git a/src/index.c b/src/index.c
index 094328b..10fb1fe 100644
--- a/src/index.c
+++ b/src/index.c
@@ -342,6 +342,28 @@ static int index_sort_if_needed(git_index *index, bool need_lock)
 	return 0;
 }
 
+GIT_INLINE(int) index_find_in_entries(
+	size_t *out, git_vector *entries, git_vector_cmp entry_srch,
+	const char *path, size_t path_len, int stage)
+{
+	struct entry_srch_key srch_key;
+	srch_key.path = path;
+	srch_key.pathlen = !path_len ? strlen(path) : path_len;
+	srch_key.stage = stage;
+	return git_vector_bsearch2(out, entries, entry_srch, &srch_key);
+}
+
+GIT_INLINE(int) index_find(
+	size_t *out, git_index *index,
+	const char *path, size_t path_len, int stage, bool need_lock)
+{
+	if (index_sort_if_needed(index, need_lock) < 0)
+		return -1;
+
+	return index_find_in_entries(
+		out, &index->entries, index->entries_search, path, path_len, stage);
+}
+
 void git_index__set_ignore_case(git_index *index, bool ignore_case)
 {
 	index->ignore_case = ignore_case;
@@ -687,16 +709,6 @@ size_t git_index_entrycount(const git_index *index)
 	return index->entries.length;
 }
 
-GIT_INLINE(int) git_index__find_internal(
-	size_t *out, git_index *index, const char *path, size_t path_len, int stage,
-	bool need_lock)
-{
-	if (index_sort_if_needed(index, need_lock) < 0)
-		return -1;
-	return git_index__find_in_entries(
-		out, &index->entries, index->entries_search, path, path_len, stage);
-}
-
 const git_index_entry *git_index_get_byindex(
 	git_index *index, size_t n)
 {
@@ -713,7 +725,7 @@ const git_index_entry *git_index_get_bypath(
 
 	assert(index);
 
-	if (git_index__find_internal(&pos, index, path, 0, stage, true) < 0) {
+	if (index_find(&pos, index, path, 0, stage, true) < 0) {
 		giterr_set(GITERR_INDEX, "Index does not contain %s", path);
 		return NULL;
 	}
@@ -896,7 +908,7 @@ static int has_dir_name(git_index *index,
 		}
 		len = slash - name;
 
-		if (!git_index__find_internal(&pos, index, name, len, stage, false)) {
+		if (!index_find(&pos, index, name, len, stage, false)) {
 			retval = -1;
 			if (!ok_to_replace)
 				break;
@@ -976,7 +988,7 @@ static int index_insert(
 	git_vector_sort(&index->entries);
 
 	/* look if an entry with this path already exists */
-	if (!git_index__find_internal(
+	if (!index_find(
 			&position, index, entry->path, 0, GIT_IDXENTRY_STAGE(entry), false)) {
 		existing = index->entries.contents[position];
 		/* update filemode to existing values if stat is not trusted */
@@ -1098,7 +1110,7 @@ int git_index_remove(git_index *index, const char *path, int stage)
 		return -1;
 	}
 
-	if (git_index__find_internal(&position, index, path, 0, stage, false) < 0) {
+	if (index_find(&position, index, path, 0, stage, false) < 0) {
 		giterr_set(
 			GITERR_INDEX, "Index does not contain %s at stage %d", path, stage);
 		error = GIT_ENOTFOUND;
@@ -1124,8 +1136,7 @@ int git_index_remove_directory(git_index *index, const char *dir, int stage)
 
 	if (!(error = git_buf_sets(&pfx, dir)) &&
 		!(error = git_path_to_dir(&pfx)))
-		git_index__find_internal(
-			&pos, index, pfx.ptr, pfx.size, GIT_INDEX_STAGE_ANY, false);
+		index_find(&pos, index, pfx.ptr, pfx.size, GIT_INDEX_STAGE_ANY, false);
 
 	while (!error) {
 		entry = git_vector_get(&index->entries, pos);
@@ -1148,22 +1159,11 @@ int git_index_remove_directory(git_index *index, const char *dir, int stage)
 	return error;
 }
 
-int git_index__find_in_entries(
-	size_t *out, git_vector *entries, git_vector_cmp entry_srch,
-	const char *path, size_t path_len, int stage)
-{
-	struct entry_srch_key srch_key;
-	srch_key.path = path;
-	srch_key.pathlen = !path_len ? strlen(path) : path_len;
-	srch_key.stage = stage;
-	return git_vector_bsearch2(out, entries, entry_srch, &srch_key);
-}
-
-int git_index__find(
+int git_index__find_pos(
 	size_t *out, git_index *index, const char *path, size_t path_len, int stage)
 {
 	assert(index && path);
-	return git_index__find_internal(out, index, path, path_len, stage, true);
+	return index_find(out, index, path, path_len, stage, true);
 }
 
 int git_index_find(size_t *at_pos, git_index *index, const char *path)
@@ -1177,7 +1177,8 @@ int git_index_find(size_t *at_pos, git_index *index, const char *path)
 		return -1;
 	}
 
-	if (git_vector_bsearch2(&pos, &index->entries, index->entries_search_path, path) < 0) {
+	if (git_vector_bsearch2(
+			&pos, &index->entries, index->entries_search_path, path) < 0) {
 		git_mutex_unlock(&index->lock);
 		giterr_set(GITERR_INDEX, "Index does not contain %s", path);
 		return GIT_ENOTFOUND;
@@ -1186,13 +1187,11 @@ int git_index_find(size_t *at_pos, git_index *index, const char *path)
 	/* Since our binary search only looked at path, we may be in the
 	 * middle of a list of stages.
 	 */
-	while (pos > 0) {
-		const git_index_entry *prev = git_vector_get(&index->entries, pos-1);
+	for (; pos > 0; --pos) {
+		const git_index_entry *prev = git_vector_get(&index->entries, pos - 1);
 
 		if (index->entries_cmp_path(prev->path, path) != 0)
 			break;
-
-		--pos;
 	}
 
 	if (at_pos)
@@ -2269,7 +2268,7 @@ static int read_tree_cb(
 
 	/* look for corresponding old entry and copy data to new entry */
 	if (data->old_entries != NULL &&
-		!git_index__find_in_entries(
+		!index_find_in_entries(
 			&pos, data->old_entries, data->entry_cmp, path.ptr, 0, 0) &&
 		(old_entry = git_vector_get(data->old_entries, pos)) != NULL &&
 		entry->mode == old_entry->mode &&
@@ -2394,7 +2393,7 @@ int git_index_add_all(
 		/* skip ignored items that are not already in the index */
 		if ((flags & GIT_INDEX_ADD_FORCE) == 0 &&
 			git_iterator_current_is_ignored(wditer) &&
-			git_index__find(&existing, index, wd->path, 0, 0) < 0)
+			index_find(&existing, index, wd->path, 0, 0, true) < 0)
 			continue;
 
 		/* issue notification callback if requested */
@@ -2556,7 +2555,7 @@ int git_index_update_all(
 	return error;
 }
 
-int git_index__snapshot(git_vector *entries, git_index *index)
+int git_index_snapshot_new(git_vector *snap, git_index *index)
 {
 	int error;
 
@@ -2570,7 +2569,7 @@ int git_index__snapshot(git_vector *entries, git_index *index)
 	git_atomic_inc(&index->readers);
 	git_vector_sort(&index->entries);
 
-	error = git_vector_dup(entries, &index->entries, index->entries._cmp);
+	error = git_vector_dup(snap, &index->entries, index->entries._cmp);
 
 	git_mutex_unlock(&index->lock);
 
@@ -2580,8 +2579,10 @@ int git_index__snapshot(git_vector *entries, git_index *index)
 	return error;
 }
 
-void git_index__release_snapshot(git_index *index)
+void git_index_snapshot_release(git_vector *snap, git_index *index)
 {
+	git_vector_free(snap);
+
 	git_atomic_dec(&index->readers);
 
 	if (!git_mutex_lock(&index->lock)) {
@@ -2591,3 +2592,10 @@ void git_index__release_snapshot(git_index *index)
 
 	git_index_free(index);
 }
+
+int git_index_snapshot_find(
+	size_t *out, git_vector *entries, git_vector_cmp entry_srch,
+	const char *path, size_t path_len, int stage)
+{
+	return index_find_in_entries(out, entries, entry_srch, path, path_len, stage);
+}
diff --git a/src/index.h b/src/index.h
index cb44258..50a0b4b 100644
--- a/src/index.h
+++ b/src/index.h
@@ -61,11 +61,13 @@ extern int git_index_entry_icmp(const void *a, const void *b);
 extern int git_index_entry_srch(const void *a, const void *b);
 extern int git_index_entry_isrch(const void *a, const void *b);
 
-/* Search index for `path`, returning GIT_ENOTFOUND if it does not exist.
+/* Search index for `path`, returning GIT_ENOTFOUND if it does not exist
+ * (but not setting an error message).
+ *
  * `at_pos` is set to the position where it is or would be inserted.
  * Pass `path_len` as strlen of path or 0 to call strlen internally.
  */
-extern int git_index__find(
+extern int git_index__find_pos(
 	size_t *at_pos, git_index *index, const char *path, size_t path_len, int stage);
 
 extern void git_index__set_ignore_case(git_index *index, bool ignore_case);
@@ -82,13 +84,13 @@ extern int git_index__changed_relative_to(git_index *index, const git_futils_fil
 /* Copy the current entries vector *and* increment the index refcount.
  * Call `git_index__release_snapshot` when done.
  */
-extern int git_index__snapshot(git_vector *entries, git_index *index);
-extern void git_index__release_snapshot(git_index *index);
+extern int git_index_snapshot_new(git_vector *snap, git_index *index);
+extern void git_index_snapshot_release(git_vector *snap, git_index *index);
 
 /* Allow searching in a snapshot; entries must already be sorted! */
-extern int git_index__find_in_entries(
-	size_t *at_pos,
-	git_vector *entries, git_vector_cmp entry_srch,
+extern int git_index_snapshot_find(
+	size_t *at_pos, git_vector *snap, git_vector_cmp entry_srch,
 	const char *path, size_t path_len, int stage);
 
+
 #endif
diff --git a/src/iterator.c b/src/iterator.c
index 53ef278..63c14f9 100644
--- a/src/iterator.c
+++ b/src/iterator.c
@@ -820,7 +820,7 @@ static int index_iterator__reset(
 	ii->current = 0;
 
 	if (ii->base.start)
-		git_index__find_in_entries(
+		git_index_snapshot_find(
 			&ii->current, &ii->entries, ii->entry_srch, ii->base.start, 0, 0);
 
 	if ((ie = index_iterator__skip_conflicts(ii)) == NULL)
@@ -846,9 +846,8 @@ static int index_iterator__reset(
 static void index_iterator__free(git_iterator *self)
 {
 	index_iterator *ii = (index_iterator *)self;
-	git_index__release_snapshot(ii->index);
+	git_index_snapshot_release(&ii->entries, ii->index);
 	ii->index = NULL;
-	git_vector_free(&ii->entries);
 	git_buf_free(&ii->partial);
 }
 
@@ -863,7 +862,7 @@ int git_iterator_for_index(
 	index_iterator *ii = git__calloc(1, sizeof(index_iterator));
 	GITERR_CHECK_ALLOC(ii);
 
-	if ((error = git_index__snapshot(&ii->entries, index)) < 0) {
+	if ((error = git_index_snapshot_new(&ii->entries, index)) < 0) {
 		git__free(ii);
 		return error;
 	}
diff --git a/src/pathspec.c b/src/pathspec.c
index 4714884..09650de 100644
--- a/src/pathspec.c
+++ b/src/pathspec.c
@@ -445,7 +445,7 @@ static int pathspec_match_from_iterator(
 		/* check if path is ignored and untracked */
 		if (index != NULL &&
 			git_iterator_current_is_ignored(iter) &&
-			git_index__find(NULL, index, entry->path, 0, GIT_INDEX_STAGE_ANY) < 0)
+			git_index__find_pos(NULL, index, entry->path, 0, GIT_INDEX_STAGE_ANY) < 0)
 			continue;
 
 		/* mark the matched pattern as used */